Hi,
here is the next version of changes to enable Linux to run as an SEV-ES
guest. The code was rebased to v5.7-rc3 and got a fair number of changes
since the last version.
What is SEV-ES
=============
SEV-ES is an acronym for 'Secure Encrypted Virtualization - Encrypted
State' and means a hardware feature of AMD processors which hides the
register state of VCPUs to the hypervisor by encrypting it. The
hypervisor can't read or make changes to the guests register state.
Most intercepts set by the hypervisor do not cause a #VMEXIT of the
guest anymore, but turn into a VMM Communication Exception (#VC
exception, vector 29) inside the guest. The error-code of this exception
is the intercept exit-code that caused the exception. The guest handles
the #VC exception by communicating with the hypervisor through a shared
data structure, the 'Guest-Hypervisor-Communication-Block'.
With SEV-ES an untrusted hypervisor can no longer steal secrets from a
guest via inspecting guest memory or guest register contents. A
malicious hypervisor can still interfere with guest operations, but the
SEV-ES client code does its best to detect such situations and crash the
VM if it happens.
More information about the implementation details can be found in the
cover letter of the initial post of these patches:
https://lore.kernel.org/lkml/20200211135256.24617-1-joro at 8bytes.org/
Current State of the Patches
===========================
The patches posted here are considered feature complete and survived a
good amount of functional testing:
1) Booting an SEV-ES guest VM to the graphical desktop.
2) Running a 16-vcpu SEV-ES VM with 'perf top' and the x86
selftests shipped with the kernel source in a loop in
parallel for 18 hours showed no issues.
3) Various compile testing has been done, including
allno/allmod/allyes/defconfig for x86-64 and i386.
4) Compiled every single commit (single .config only) to check
if they build and do not introduce new warnings.
5) Boot-tested the changes on various machines, including
bare-metal on an AMD (with and without mem_encrypt=on) and
Intel machine.
A git-tree with these patches applied can be found here:
https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git/log/?h=sev-es-client-v5.7-rc3
Changes to the previous version
==============================
Here is an incomplete list of changes to the previous version of this
patch-set. There have been so many small changes that I havn't kept
track of all, but the most important ones are listed:
- Rebased to v5.7-rc3
- Changes the #VC exception handler to use an IST stack. This
includes a couple of additional patches to set up and map the
IST stack, to make dumpstack aware of them and to fix a race
with the NMI handler when shifting the #VC handlers IST entry.
- The NMI_Complete message to the hypervisor the re-open the NMI
window is now sent at the very beginning of do_nmi().
- The GHCB used in the pre-decompression code is now re-mapped
encrypted and flushed from the cache before jumping to the
decompressed kernel image. This is needed to make sure the
running kernel can safely re-use the page. Actually the page
is also unmapped after being re-encrypted to catch any
use-after-remap.
- Added CPUID caching.
- Mapped the GHCBs to the EFI page-tables as the UEFI BIOS
expects to be able to re-use the OS GHCBs.
- RDTSC and RDTSCP are now also handled in the pre-decompression
boot code. These instructions are used by KASLR and some
hypervisors might intercept them.
- Re-implemented nested GHCB handling by keeping a backup GHCB
around. This supports one level of GHCB nesting, which is
sufficient for now.
- Moved all SEV-ES related per-cpu data into
'struct sev_es_runtime_data'. This struct is allocated and
initialized at boot per cpu.
- Correctly set the protocol and ghcb_usage information when
talking to the hypervisor.
The previous version of the patch-set can be found here:
https://lore.kernel.org/lkml/20200319091407.1481-1-joro at 8bytes.org/
Please review.
Thanks,
Joerg
Borislav Petkov (1):
KVM: SVM: Use __packed shorthand
Doug Covelli (1):
x86/vmware: Add VMware specific handling for VMMCALL under SEV-ES
Joerg Roedel (53):
KVM: SVM: Add GHCB Accessor functions
x86/traps: Move some definitions to <asm/trap_defs.h>
x86/insn: Make inat-tables.c suitable for pre-decompression code
x86/umip: Factor out instruction fetch
x86/umip: Factor out instruction decoding
x86/insn: Add insn_get_modrm_reg_off()
x86/insn: Add insn_rep_prefix() helper
x86/boot/compressed/64: Disable red-zone usage
x86/boot/compressed/64: Switch to __KERNEL_CS after GDT is loaded
x86/boot/compressed/64: Add IDT Infrastructure
x86/boot/compressed/64: Rename kaslr_64.c to ident_map_64.c
x86/boot/compressed/64: Add page-fault handler
x86/boot/compressed/64: Always switch to own page-table
x86/boot/compressed/64: Don't pre-map memory in KASLR code
x86/boot/compressed/64: Change add_identity_map() to take start and
end
x86/boot/compressed/64: Add stage1 #VC handler
x86/boot/compressed/64: Call set_sev_encryption_mask earlier
x86/boot/compressed/64: Check return value of
kernel_ident_mapping_init()
x86/boot/compressed/64: Add set_page_en/decrypted() helpers
x86/boot/compressed/64: Setup GHCB Based VC Exception handler
x86/boot/compressed/64: Unmap GHCB page before booting the kernel
x86/fpu: Move xgetbv()/xsetbv() into separate header
x86/idt: Move IDT to data segment
x86/idt: Split idt_data setup out of set_intr_gate()
x86/idt: Move two function from k/idt.c to i/a/desc.h
x86/head/64: Install boot GDT
x86/head/64: Reload GDT after switch to virtual addresses
x86/head/64: Load segment registers earlier
x86/head/64: Switch to initial stack earlier
x86/head/64: Build k/head64.c with -fno-stack-protector
x86/head/64: Load IDT earlier
x86/head/64: Move early exception dispatch to C code
x86/sev-es: Add SEV-ES Feature Detection
x86/sev-es: Print SEV-ES info into kernel log
x86/sev-es: Compile early handler code into kernel image
x86/sev-es: Setup early #VC handler
x86/sev-es: Setup GHCB based boot #VC handler
x86/sev-es: Allocate and Map IST stacks for #VC handler
x86/dumpstack/64: Handle #VC exception stacks
x86/sev-es: Shift #VC IST Stack in nmi_enter()/nmi_exit()
x86/sev-es: Wire up existing #VC exit-code handlers
x86/sev-es: Handle instruction fetches from user-space
x86/sev-es: Do not crash on #VC exceptions from user-space
x86/sev-es: Handle MMIO String Instructions
x86/sev-es: Handle #AC Events
x86/sev-es: Handle #DB Events
x86/paravirt: Allow hypervisor specific VMMCALL handling under SEV-ES
x86/realmode: Add SEV-ES specific trampoline entry point
x86/head/64: Setup TSS early for secondary CPUs
x86/head/64: Don't call verify_cpu() on starting APs
x86/head/64: Rename start_cpu0
x86/sev-es: Support CPU offline/online
x86/sev-es: Handle NMI State
Mike Stunes (1):
x86/sev-es: Cache CPUID results for improved performance
Tom Lendacky (19):
KVM: SVM: Add GHCB definitions
x86/cpufeatures: Add SEV-ES CPU feature
x86/sev-es: Add support for handling IOIO exceptions
x86/sev-es: Add CPUID handling to #VC handler
x86/sev-es: Setup per-cpu GHCBs for the runtime handler
x86/sev-es: Add Runtime #VC Exception Handler
x86/sev-es: Handle MMIO events
x86/sev-es: Handle MSR events
x86/sev-es: Handle DR7 read/write events
x86/sev-es: Handle WBINVD Events
x86/sev-es: Handle RDTSC(P) Events
x86/sev-es: Handle RDPMC Events
x86/sev-es: Handle INVD Events
x86/sev-es: Handle MONITOR/MONITORX Events
x86/sev-es: Handle MWAIT/MWAITX Events
x86/sev-es: Handle VMMCALL Events
x86/kvm: Add KVM specific VMMCALL handling under SEV-ES
x86/realmode: Setup AP jump table
x86/efi: Add GHCB mappings when SEV-ES is active
arch/x86/Kconfig | 1 +
arch/x86/boot/Makefile | 2 +-
arch/x86/boot/compressed/Makefile | 9 +-
arch/x86/boot/compressed/head_64.S | 40 +-
arch/x86/boot/compressed/ident_map_64.c | 339 +++++
arch/x86/boot/compressed/idt_64.c | 53 +
arch/x86/boot/compressed/idt_handlers_64.S | 76 ++
arch/x86/boot/compressed/kaslr.c | 36 +-
arch/x86/boot/compressed/kaslr_64.c | 153 ---
arch/x86/boot/compressed/misc.c | 7 +
arch/x86/boot/compressed/misc.h | 45 +-
arch/x86/boot/compressed/sev-es.c | 210 +++
arch/x86/entry/entry_64.S | 4 +
arch/x86/include/asm/cpu.h | 2 +-
arch/x86/include/asm/cpu_entry_area.h | 62 +
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/desc.h | 30 +
arch/x86/include/asm/desc_defs.h | 10 +
arch/x86/include/asm/fpu/internal.h | 29 +-
arch/x86/include/asm/fpu/xcr.h | 32 +
arch/x86/include/asm/hardirq.h | 14 +
arch/x86/include/asm/insn-eval.h | 6 +
arch/x86/include/asm/mem_encrypt.h | 5 +
arch/x86/include/asm/msr-index.h | 3 +
arch/x86/include/asm/page_64_types.h | 1 +
arch/x86/include/asm/pgtable.h | 2 +-
arch/x86/include/asm/processor.h | 1 +
arch/x86/include/asm/realmode.h | 4 +
arch/x86/include/asm/segment.h | 2 +-
arch/x86/include/asm/setup.h | 1 -
arch/x86/include/asm/sev-es.h | 107 ++
arch/x86/include/asm/stacktrace.h | 4 +
arch/x86/include/asm/svm.h | 115 +-
arch/x86/include/asm/trap_defs.h | 50 +
arch/x86/include/asm/traps.h | 51 +-
arch/x86/include/asm/x86_init.h | 16 +-
arch/x86/include/uapi/asm/svm.h | 11 +
arch/x86/kernel/Makefile | 5 +
arch/x86/kernel/asm-offsets_64.c | 1 +
arch/x86/kernel/cpu/amd.c | 3 +-
arch/x86/kernel/cpu/common.c | 1 +
arch/x86/kernel/cpu/scattered.c | 1 +
arch/x86/kernel/cpu/vmware.c | 50 +-
arch/x86/kernel/dumpstack_64.c | 47 +
arch/x86/kernel/head64.c | 70 +-
arch/x86/kernel/head_32.S | 4 +-
arch/x86/kernel/head_64.S | 176 ++-
arch/x86/kernel/idt.c | 52 +-
arch/x86/kernel/kvm.c | 35 +-
arch/x86/kernel/nmi.c | 8 +
arch/x86/kernel/sev-es-shared.c | 479 +++++++
arch/x86/kernel/sev-es.c | 1428 ++++++++++++++++++++
arch/x86/kernel/smpboot.c | 4 +-
arch/x86/kernel/traps.c | 3 +
arch/x86/kernel/umip.c | 49 +-
arch/x86/lib/insn-eval.c | 130 ++
arch/x86/mm/extable.c | 1 +
arch/x86/mm/mem_encrypt.c | 39 +-
arch/x86/mm/mem_encrypt_identity.c | 3 +
arch/x86/platform/efi/efi_64.c | 10 +
arch/x86/realmode/init.c | 12 +
arch/x86/realmode/rm/header.S | 3 +
arch/x86/realmode/rm/trampoline_64.S | 20 +
arch/x86/tools/gen-insn-attr-x86.awk | 50 +-
tools/arch/x86/tools/gen-insn-attr-x86.awk | 50 +-
65 files changed, 3842 insertions(+), 426 deletions(-)
create mode 100644 arch/x86/boot/compressed/ident_map_64.c
create mode 100644 arch/x86/boot/compressed/idt_64.c
create mode 100644 arch/x86/boot/compressed/idt_handlers_64.S
delete mode 100644 arch/x86/boot/compressed/kaslr_64.c
create mode 100644 arch/x86/boot/compressed/sev-es.c
create mode 100644 arch/x86/include/asm/fpu/xcr.h
create mode 100644 arch/x86/include/asm/sev-es.h
create mode 100644 arch/x86/include/asm/trap_defs.h
create mode 100644 arch/x86/kernel/sev-es-shared.c
create mode 100644 arch/x86/kernel/sev-es.c
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Extend the vmcb_safe_area with SEV-ES fields and add a new
'struct ghcb' which will be used for guest-hypervisor communication.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/svm.h | 42 ++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 6ece8561ba66..f36288c659b5 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -201,6 +201,48 @@ struct __attribute__ ((__packed__)) vmcb_save_area {
u64 br_to;
u64 last_excp_from;
u64 last_excp_to;
+
+ /*
+ * The following part of the save area is valid only for
+ * SEV-ES guests when referenced through the GHCB.
+ */
+ u8 reserved_7[104];
+ u64 reserved_8; /* rax already available at 0x01f8 */
+ u64 rcx;
+ u64 rdx;
+ u64 rbx;
+ u64 reserved_9; /* rsp already available at 0x01d8 */
+ u64 rbp;
+ u64 rsi;
+ u64 rdi;
+ u64 r8;
+ u64 r9;
+ u64 r10;
+ u64 r11;
+ u64 r12;
+ u64 r13;
+ u64 r14;
+ u64 r15;
+ u8 reserved_10[16];
+ u64 sw_exit_code;
+ u64 sw_exit_info_1;
+ u64 sw_exit_info_2;
+ u64 sw_scratch;
+ u8 reserved_11[56];
+ u64 xcr0;
+ u8 valid_bitmap[16];
+ u64 x87_state_gpa;
+ u8 reserved_12[1016];
+};
+
+struct __attribute__ ((__packed__)) ghcb {
+ struct vmcb_save_area save;
+
+ u8 shared_buffer[2032];
+
+ u8 reserved_1[10];
+ u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */
+ u32 ghcb_usage;
};
struct __attribute__ ((__packed__)) vmcb {
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
Building a correct GHCB for the hypervisor requires setting valid bits
in the GHCB. Simplify that process by providing accessor functions to
set values and to update the valid bitmap.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/svm.h | 61 ++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index f36288c659b5..e4e9f6bacfaa 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -333,4 +333,65 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
+/* GHCB Accessor functions */
+
+#define DEFINE_GHCB_INDICES(field) \
+ u16 idx = offsetof(struct vmcb_save_area, field) / 8; \
+ u16 byte_idx = idx / 8; \
+ u16 bit_idx = idx % 8; \
+ BUILD_BUG_ON(byte_idx > ARRAY_SIZE(ghcb->save.valid_bitmap));
+
+#define GHCB_SET_VALID(ghcb, field) \
+ { \
+ DEFINE_GHCB_INDICES(field) \
+ (ghcb)->save.valid_bitmap[byte_idx] |= BIT(bit_idx); \
+ }
+
+#define DEFINE_GHCB_SETTER(field) \
+ static inline void \
+ ghcb_set_##field(struct ghcb *ghcb, u64 value) \
+ { \
+ GHCB_SET_VALID(ghcb, field) \
+ (ghcb)->save.field = value; \
+ }
+
+#define DEFINE_GHCB_ACCESSORS(field) \
+ static inline bool ghcb_is_valid_##field(const struct ghcb *ghcb) \
+ { \
+ DEFINE_GHCB_INDICES(field) \
+ return !!((ghcb)->save.valid_bitmap[byte_idx] \
+ & BIT(bit_idx)); \
+ } \
+ \
+ static inline void \
+ ghcb_set_##field(struct ghcb *ghcb, u64 value) \
+ { \
+ GHCB_SET_VALID(ghcb, field) \
+ (ghcb)->save.field = value; \
+ }
+
+DEFINE_GHCB_ACCESSORS(cpl)
+DEFINE_GHCB_ACCESSORS(rip)
+DEFINE_GHCB_ACCESSORS(rsp)
+DEFINE_GHCB_ACCESSORS(rax)
+DEFINE_GHCB_ACCESSORS(rcx)
+DEFINE_GHCB_ACCESSORS(rdx)
+DEFINE_GHCB_ACCESSORS(rbx)
+DEFINE_GHCB_ACCESSORS(rbp)
+DEFINE_GHCB_ACCESSORS(rsi)
+DEFINE_GHCB_ACCESSORS(rdi)
+DEFINE_GHCB_ACCESSORS(r8)
+DEFINE_GHCB_ACCESSORS(r9)
+DEFINE_GHCB_ACCESSORS(r10)
+DEFINE_GHCB_ACCESSORS(r11)
+DEFINE_GHCB_ACCESSORS(r12)
+DEFINE_GHCB_ACCESSORS(r13)
+DEFINE_GHCB_ACCESSORS(r14)
+DEFINE_GHCB_ACCESSORS(r15)
+DEFINE_GHCB_ACCESSORS(sw_exit_code)
+DEFINE_GHCB_ACCESSORS(sw_exit_info_1)
+DEFINE_GHCB_ACCESSORS(sw_exit_info_2)
+DEFINE_GHCB_ACCESSORS(sw_scratch)
+DEFINE_GHCB_ACCESSORS(xcr0)
+
#endif
--
2.17.1
From: Borislav Petkov <bp at alien8.de>
I guess we can do that ontop.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/svm.h | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index e4e9f6bacfaa..9adbf69f003c 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -151,14 +151,14 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
#define SVM_NESTED_CTL_NP_ENABLE BIT(0)
#define SVM_NESTED_CTL_SEV_ENABLE BIT(1)
-struct __attribute__ ((__packed__)) vmcb_seg {
+struct vmcb_seg {
u16 selector;
u16 attrib;
u32 limit;
u64 base;
-};
+} __packed;
-struct __attribute__ ((__packed__)) vmcb_save_area {
+struct vmcb_save_area {
struct vmcb_seg es;
struct vmcb_seg cs;
struct vmcb_seg ss;
@@ -233,9 +233,9 @@ struct __attribute__ ((__packed__)) vmcb_save_area {
u8 valid_bitmap[16];
u64 x87_state_gpa;
u8 reserved_12[1016];
-};
+} __packed;
-struct __attribute__ ((__packed__)) ghcb {
+struct ghcb {
struct vmcb_save_area save;
u8 shared_buffer[2032];
@@ -243,12 +243,12 @@ struct __attribute__ ((__packed__)) ghcb {
u8 reserved_1[10];
u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */
u32 ghcb_usage;
-};
+} __packed;
-struct __attribute__ ((__packed__)) vmcb {
+struct vmcb {
struct vmcb_control_area control;
struct vmcb_save_area save;
-};
+} __packed;
#define SVM_CPUID_FUNC 0x8000000a
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 04/75] x86/cpufeatures: Add SEV-ES CPU feature
From: Tom Lendacky <thomas.lendacky at amd.com>
Add CPU feature detection for Secure Encrypted Virtualization with
Encrypted State. This feature enhances SEV by also encrypting the
guest register state, making it in-accessible to the hypervisor.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/kernel/cpu/amd.c | 3 ++-
arch/x86/kernel/cpu/scattered.c | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/cpufeatures.h
b/arch/x86/include/asm/cpufeatures.h
index db189945e9b0..ade59fca283a 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -234,6 +234,7 @@
#define X86_FEATURE_EPT_AD ( 8*32+17) /* Intel Extended Page Table
access-dirty bit */
#define X86_FEATURE_VMCALL ( 8*32+18) /* "" Hypervisor supports the
VMCALL instruction */
#define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* "" VMware prefers
VMMCALL hypercall instruction */
+#define X86_FEATURE_SEV_ES ( 8*32+20) /* AMD Secure Encrypted Virtualization -
Encrypted State */
/* Intel-defined CPU features, CPUID level 0x00000007:0 (EBX), word 9 */
#define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* RDFSBASE, WRFSBASE, RDGSBASE,
WRGSBASE instructions*/
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 547ad7bbf0e0..6b036291b9b3 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -610,7 +610,7 @@ static void early_detect_mem_encrypt(struct cpuinfo_x86 *c)
* If BIOS has not enabled SME then don't advertise the
* SME feature (set in scattered.c).
* For SEV: If BIOS has not enabled SEV then don't advertise the
- * SEV feature (set in scattered.c).
+ * SEV and SEV_ES feature (set in scattered.c).
*
* In all cases, since support for SME and SEV requires long mode,
* don't advertise the feature under CONFIG_X86_32.
@@ -641,6 +641,7 @@ static void early_detect_mem_encrypt(struct cpuinfo_x86 *c)
setup_clear_cpu_cap(X86_FEATURE_SME);
clear_sev:
setup_clear_cpu_cap(X86_FEATURE_SEV);
+ setup_clear_cpu_cap(X86_FEATURE_SEV_ES);
}
}
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 62b137c3c97a..30f354989cf1 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -41,6 +41,7 @@ static const struct cpuid_bit cpuid_bits[] = {
{ X86_FEATURE_MBA, CPUID_EBX, 6, 0x80000008, 0 },
{ X86_FEATURE_SME, CPUID_EAX, 0, 0x8000001f, 0 },
{ X86_FEATURE_SEV, CPUID_EAX, 1, 0x8000001f, 0 },
+ { X86_FEATURE_SEV_ES, CPUID_EAX, 3, 0x8000001f, 0 },
{ 0, 0, 0, 0, 0 }
};
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 05/75] x86/traps: Move some definitions to <asm/trap_defs.h>
From: Joerg Roedel <jroedel at suse.de>
Move the definition of x86 trap vector numbers and the page-fault
error code bits to the new header file asm/trap_defs.h. This makes it
easier to include them into pre-decompression boot code. No functional
changes.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/trap_defs.h | 49 ++++++++++++++++++++++++++++++++
arch/x86/include/asm/traps.h | 44 +---------------------------
2 files changed, 50 insertions(+), 43 deletions(-)
create mode 100644 arch/x86/include/asm/trap_defs.h
diff --git a/arch/x86/include/asm/trap_defs.h b/arch/x86/include/asm/trap_defs.h
new file mode 100644
index 000000000000..488f82ac36da
--- /dev/null
+++ b/arch/x86/include/asm/trap_defs.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_TRAP_DEFS_H
+#define _ASM_X86_TRAP_DEFS_H
+
+/* Interrupts/Exceptions */
+enum {
+ X86_TRAP_DE = 0, /* 0, Divide-by-zero */
+ X86_TRAP_DB, /* 1, Debug */
+ X86_TRAP_NMI, /* 2, Non-maskable Interrupt */
+ X86_TRAP_BP, /* 3, Breakpoint */
+ X86_TRAP_OF, /* 4, Overflow */
+ X86_TRAP_BR, /* 5, Bound Range Exceeded */
+ X86_TRAP_UD, /* 6, Invalid Opcode */
+ X86_TRAP_NM, /* 7, Device Not Available */
+ X86_TRAP_DF, /* 8, Double Fault */
+ X86_TRAP_OLD_MF, /* 9, Coprocessor Segment Overrun */
+ X86_TRAP_TS, /* 10, Invalid TSS */
+ X86_TRAP_NP, /* 11, Segment Not Present */
+ X86_TRAP_SS, /* 12, Stack Segment Fault */
+ X86_TRAP_GP, /* 13, General Protection Fault */
+ X86_TRAP_PF, /* 14, Page Fault */
+ X86_TRAP_SPURIOUS, /* 15, Spurious Interrupt */
+ X86_TRAP_MF, /* 16, x87 Floating-Point Exception */
+ X86_TRAP_AC, /* 17, Alignment Check */
+ X86_TRAP_MC, /* 18, Machine Check */
+ X86_TRAP_XF, /* 19, SIMD Floating-Point Exception */
+ X86_TRAP_IRET = 32, /* 32, IRET Exception */
+};
+
+/*
+ * Page fault error code bits:
+ *
+ * bit 0 == 0: no page found 1: protection fault
+ * bit 1 == 0: read access 1: write access
+ * bit 2 == 0: kernel-mode access 1: user-mode access
+ * bit 3 == 1: use of reserved bit detected
+ * bit 4 == 1: fault was an instruction fetch
+ * bit 5 == 1: protection keys block access
+ */
+enum x86_pf_error_code {
+ X86_PF_PROT = 1 << 0,
+ X86_PF_WRITE = 1 << 1,
+ X86_PF_USER = 1 << 2,
+ X86_PF_RSVD = 1 << 3,
+ X86_PF_INSTR = 1 << 4,
+ X86_PF_PK = 1 << 5,
+};
+
+#endif /* _ASM_X86_TRAP_DEFS_H */
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index c26a7e1d8a2c..104991c05425 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -5,6 +5,7 @@
#include <linux/context_tracking_state.h>
#include <linux/kprobes.h>
+#include <asm/trap_defs.h>
#include <asm/debugreg.h>
#include <asm/siginfo.h> /* TRAP_TRACE, ... */
@@ -129,47 +130,4 @@ void __noreturn handle_stack_overflow(const char *message,
unsigned long fault_address);
#endif
-/* Interrupts/Exceptions */
-enum {
- X86_TRAP_DE = 0, /* 0, Divide-by-zero */
- X86_TRAP_DB, /* 1, Debug */
- X86_TRAP_NMI, /* 2, Non-maskable Interrupt */
- X86_TRAP_BP, /* 3, Breakpoint */
- X86_TRAP_OF, /* 4, Overflow */
- X86_TRAP_BR, /* 5, Bound Range Exceeded */
- X86_TRAP_UD, /* 6, Invalid Opcode */
- X86_TRAP_NM, /* 7, Device Not Available */
- X86_TRAP_DF, /* 8, Double Fault */
- X86_TRAP_OLD_MF, /* 9, Coprocessor Segment Overrun */
- X86_TRAP_TS, /* 10, Invalid TSS */
- X86_TRAP_NP, /* 11, Segment Not Present */
- X86_TRAP_SS, /* 12, Stack Segment Fault */
- X86_TRAP_GP, /* 13, General Protection Fault */
- X86_TRAP_PF, /* 14, Page Fault */
- X86_TRAP_SPURIOUS, /* 15, Spurious Interrupt */
- X86_TRAP_MF, /* 16, x87 Floating-Point Exception */
- X86_TRAP_AC, /* 17, Alignment Check */
- X86_TRAP_MC, /* 18, Machine Check */
- X86_TRAP_XF, /* 19, SIMD Floating-Point Exception */
- X86_TRAP_IRET = 32, /* 32, IRET Exception */
-};
-
-/*
- * Page fault error code bits:
- *
- * bit 0 == 0: no page found 1: protection fault
- * bit 1 == 0: read access 1: write access
- * bit 2 == 0: kernel-mode access 1: user-mode access
- * bit 3 == 1: use of reserved bit detected
- * bit 4 == 1: fault was an instruction fetch
- * bit 5 == 1: protection keys block access
- */
-enum x86_pf_error_code {
- X86_PF_PROT = 1 << 0,
- X86_PF_WRITE = 1 << 1,
- X86_PF_USER = 1 << 2,
- X86_PF_RSVD = 1 << 3,
- X86_PF_INSTR = 1 << 4,
- X86_PF_PK = 1 << 5,
-};
#endif /* _ASM_X86_TRAPS_H */
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 06/75] x86/insn: Make inat-tables.c suitable for pre-decompression code
From: Joerg Roedel <jroedel at suse.de>
The inat-tables.c file has some arrays in it that contain pointers to
other arrays. These pointers need to be relocated when the kernel
image is moved to a different location.
The pre-decompression boot-code has no support for applying ELF
relocations, so initialize these arrays at runtime in the
pre-decompression code to make sure all pointers are correctly
initialized.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/tools/gen-insn-attr-x86.awk | 50 +++++++++++++++++++++-
tools/arch/x86/tools/gen-insn-attr-x86.awk | 50 +++++++++++++++++++++-
2 files changed, 98 insertions(+), 2 deletions(-)
diff --git a/arch/x86/tools/gen-insn-attr-x86.awk
b/arch/x86/tools/gen-insn-attr-x86.awk
index a42015b305f4..af38469afd14 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -362,6 +362,9 @@ function convert_operands(count,opnd, i,j,imm,mod)
END {
if (awkchecked != "")
exit 1
+
+ print "#ifndef __BOOT_COMPRESSED\n"
+
# print escape opcode map's array
print "/* Escape opcode map array */"
print "const insn_attr_t * const inat_escape_tables[INAT_ESC_MAX +
1]" \
@@ -388,6 +391,51 @@ END {
for (j = 0; j < max_lprefix; j++)
if (atable[i,j])
print " ["i"]["j"] =
"atable[i,j]","
- print "};"
+ print "};\n"
+
+ print "#else /* !__BOOT_COMPRESSED */\n"
+
+ print "/* Escape opcode map array */"
+ print "static const insn_attr_t *inat_escape_tables[INAT_ESC_MAX +
1]" \
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "/* Group opcode map array */"
+ print "static const insn_attr_t *inat_group_tables[INAT_GRP_MAX +
1]"\
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "/* AVX opcode map array */"
+ print "static const insn_attr_t *inat_avx_tables[X86_VEX_M_MAX +
1]"\
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "static void inat_init_tables(void)"
+ print "{"
+
+ # print escape opcode map's array
+ print "\t/* Print Escape opcode map array */"
+ for (i = 0; i < geid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (etable[i,j])
+ print "\tinat_escape_tables["i"]["j"] =
"etable[i,j]";"
+ print ""
+
+ # print group opcode map's array
+ print "\t/* Print Group opcode map array */"
+ for (i = 0; i < ggid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (gtable[i,j])
+ print "\tinat_group_tables["i"]["j"] =
"gtable[i,j]";"
+ print ""
+ # print AVX opcode map's array
+ print "\t/* Print AVX opcode map array */"
+ for (i = 0; i < gaid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (atable[i,j])
+ print "\tinat_avx_tables["i"]["j"] =
"atable[i,j]";"
+
+ print "}"
+ print "#endif"
}
diff --git a/tools/arch/x86/tools/gen-insn-attr-x86.awk
b/tools/arch/x86/tools/gen-insn-attr-x86.awk
index a42015b305f4..af38469afd14 100644
--- a/tools/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/tools/arch/x86/tools/gen-insn-attr-x86.awk
@@ -362,6 +362,9 @@ function convert_operands(count,opnd, i,j,imm,mod)
END {
if (awkchecked != "")
exit 1
+
+ print "#ifndef __BOOT_COMPRESSED\n"
+
# print escape opcode map's array
print "/* Escape opcode map array */"
print "const insn_attr_t * const inat_escape_tables[INAT_ESC_MAX +
1]" \
@@ -388,6 +391,51 @@ END {
for (j = 0; j < max_lprefix; j++)
if (atable[i,j])
print " ["i"]["j"] =
"atable[i,j]","
- print "};"
+ print "};\n"
+
+ print "#else /* !__BOOT_COMPRESSED */\n"
+
+ print "/* Escape opcode map array */"
+ print "static const insn_attr_t *inat_escape_tables[INAT_ESC_MAX +
1]" \
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "/* Group opcode map array */"
+ print "static const insn_attr_t *inat_group_tables[INAT_GRP_MAX +
1]"\
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "/* AVX opcode map array */"
+ print "static const insn_attr_t *inat_avx_tables[X86_VEX_M_MAX +
1]"\
+ "[INAT_LSTPFX_MAX + 1];"
+ print ""
+
+ print "static void inat_init_tables(void)"
+ print "{"
+
+ # print escape opcode map's array
+ print "\t/* Print Escape opcode map array */"
+ for (i = 0; i < geid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (etable[i,j])
+ print "\tinat_escape_tables["i"]["j"] =
"etable[i,j]";"
+ print ""
+
+ # print group opcode map's array
+ print "\t/* Print Group opcode map array */"
+ for (i = 0; i < ggid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (gtable[i,j])
+ print "\tinat_group_tables["i"]["j"] =
"gtable[i,j]";"
+ print ""
+ # print AVX opcode map's array
+ print "\t/* Print AVX opcode map array */"
+ for (i = 0; i < gaid; i++)
+ for (j = 0; j < max_lprefix; j++)
+ if (atable[i,j])
+ print "\tinat_avx_tables["i"]["j"] =
"atable[i,j]";"
+
+ print "}"
+ print "#endif"
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 07/75] x86/umip: Factor out instruction fetch
From: Joerg Roedel <jroedel at suse.de>
Factor out the code to fetch the instruction from user-space to a helper
function.
No functional changes.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/insn-eval.h | 2 ++
arch/x86/kernel/umip.c | 26 +++++-----------------
arch/x86/lib/insn-eval.c | 38 ++++++++++++++++++++++++++++++++
3 files changed, 46 insertions(+), 20 deletions(-)
diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
index 2b6ccf2c49f1..b8b9ef1bbd06 100644
--- a/arch/x86/include/asm/insn-eval.h
+++ b/arch/x86/include/asm/insn-eval.h
@@ -19,5 +19,7 @@ void __user *insn_get_addr_ref(struct insn *insn, struct
pt_regs *regs);
int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
int insn_get_code_seg_params(struct pt_regs *regs);
+int insn_fetch_from_user(struct pt_regs *regs,
+ unsigned char buf[MAX_INSN_SIZE]);
#endif /* _ASM_X86_INSN_EVAL_H */
diff --git a/arch/x86/kernel/umip.c b/arch/x86/kernel/umip.c
index 8d5cbe1bbb3b..c9e5345da793 100644
--- a/arch/x86/kernel/umip.c
+++ b/arch/x86/kernel/umip.c
@@ -317,11 +317,11 @@ static void force_sig_info_umip_fault(void __user *addr,
struct pt_regs *regs)
*/
bool fixup_umip_exception(struct pt_regs *regs)
{
- int not_copied, nr_copied, reg_offset, dummy_data_size, umip_inst;
- unsigned long seg_base = 0, *reg_addr;
+ int nr_copied, reg_offset, dummy_data_size, umip_inst;
/* 10 bytes is the maximum size of the result of UMIP instructions */
unsigned char dummy_data[10] = { 0 };
unsigned char buf[MAX_INSN_SIZE];
+ unsigned long *reg_addr;
void __user *uaddr;
struct insn insn;
int seg_defs;
@@ -329,26 +329,12 @@ bool fixup_umip_exception(struct pt_regs *regs)
if (!regs)
return false;
- /*
- * If not in user-space long mode, a custom code segment could be in
- * use. This is true in protected mode (if the process defined a local
- * descriptor table), or virtual-8086 mode. In most of the cases
- * seg_base will be zero as in USER_CS.
- */
- if (!user_64bit_mode(regs))
- seg_base = insn_get_seg_base(regs, INAT_SEG_REG_CS);
-
- if (seg_base == -1L)
- return false;
-
- not_copied = copy_from_user(buf, (void __user *)(seg_base + regs->ip),
- sizeof(buf));
- nr_copied = sizeof(buf) - not_copied;
+ nr_copied = insn_fetch_from_user(regs, buf);
/*
- * The copy_from_user above could have failed if user code is protected
- * by a memory protection key. Give up on emulation in such a case.
- * Should we issue a page fault?
+ * The insn_fetch_from_user above could have failed if user code
+ * is protected by a memory protection key. Give up on emulation
+ * in such a case. Should we issue a page fault?
*/
if (!nr_copied)
return false;
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 31600d851fd8..0c4f7ebc261b 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -1369,3 +1369,41 @@ void __user *insn_get_addr_ref(struct insn *insn, struct
pt_regs *regs)
return (void __user *)-1L;
}
}
+
+/**
+ * insn_fetch_from_user() - Copy instruction bytes from user-space memory
+ * @regs: Structure with register values as seen when entering kernel mode
+ * @buf: Array to store the fetched instruction
+ *
+ * Gets the linear address of the instruction and copies the instruction bytes
+ * to the buf.
+ *
+ * Returns:
+ *
+ * Number of instruction bytes copied.
+ *
+ * 0 if nothing was copied.
+ */
+int insn_fetch_from_user(struct pt_regs *regs, unsigned char
buf[MAX_INSN_SIZE])
+{
+ unsigned long seg_base = 0;
+ int not_copied;
+
+ /*
+ * If not in user-space long mode, a custom code segment could be in
+ * use. This is true in protected mode (if the process defined a local
+ * descriptor table), or virtual-8086 mode. In most of the cases
+ * seg_base will be zero as in USER_CS.
+ */
+ if (!user_64bit_mode(regs)) {
+ seg_base = insn_get_seg_base(regs, INAT_SEG_REG_CS);
+ if (seg_base == -1L)
+ return 0;
+ }
+
+
+ not_copied = copy_from_user(buf, (void __user *)(seg_base + regs->ip),
+ MAX_INSN_SIZE);
+
+ return MAX_INSN_SIZE - not_copied;
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 08/75] x86/umip: Factor out instruction decoding
From: Joerg Roedel <jroedel at suse.de>
Factor out the code used to decode an instruction with the correct
address and operand sizes to a helper function.
No functional changes.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/insn-eval.h | 2 ++
arch/x86/kernel/umip.c | 23 +---------------
arch/x86/lib/insn-eval.c | 45 ++++++++++++++++++++++++++++++++
3 files changed, 48 insertions(+), 22 deletions(-)
diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
index b8b9ef1bbd06..b4ff3e3316d1 100644
--- a/arch/x86/include/asm/insn-eval.h
+++ b/arch/x86/include/asm/insn-eval.h
@@ -21,5 +21,7 @@ unsigned long insn_get_seg_base(struct pt_regs *regs, int
seg_reg_idx);
int insn_get_code_seg_params(struct pt_regs *regs);
int insn_fetch_from_user(struct pt_regs *regs,
unsigned char buf[MAX_INSN_SIZE]);
+bool insn_decode(struct pt_regs *regs, struct insn *insn,
+ unsigned char buf[MAX_INSN_SIZE], int buf_size);
#endif /* _ASM_X86_INSN_EVAL_H */
diff --git a/arch/x86/kernel/umip.c b/arch/x86/kernel/umip.c
index c9e5345da793..47d4d32e9cad 100644
--- a/arch/x86/kernel/umip.c
+++ b/arch/x86/kernel/umip.c
@@ -324,7 +324,6 @@ bool fixup_umip_exception(struct pt_regs *regs)
unsigned long *reg_addr;
void __user *uaddr;
struct insn insn;
- int seg_defs;
if (!regs)
return false;
@@ -339,27 +338,7 @@ bool fixup_umip_exception(struct pt_regs *regs)
if (!nr_copied)
return false;
- insn_init(&insn, buf, nr_copied, user_64bit_mode(regs));
-
- /*
- * Override the default operand and address sizes with what is specified
- * in the code segment descriptor. The instruction decoder only sets
- * the address size it to either 4 or 8 address bytes and does nothing
- * for the operand bytes. This OK for most of the cases, but we could
- * have special cases where, for instance, a 16-bit code segment
- * descriptor is used.
- * If there is an address override prefix, the instruction decoder
- * correctly updates these values, even for 16-bit defaults.
- */
- seg_defs = insn_get_code_seg_params(regs);
- if (seg_defs == -EINVAL)
- return false;
-
- insn.addr_bytes = INSN_CODE_SEG_ADDR_SZ(seg_defs);
- insn.opnd_bytes = INSN_CODE_SEG_OPND_SZ(seg_defs);
-
- insn_get_length(&insn);
- if (nr_copied < insn.length)
+ if (!insn_decode(regs, &insn, buf, nr_copied))
return false;
umip_inst = identify_insn(&insn);
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 0c4f7ebc261b..0bbb814d4851 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -1407,3 +1407,48 @@ int insn_fetch_from_user(struct pt_regs *regs, unsigned
char buf[MAX_INSN_SIZE])
return MAX_INSN_SIZE - not_copied;
}
+
+/**
+ * insn_decode() - Decode an instruction
+ * @regs: Structure with register values as seen when entering kernel mode
+ * @insn: Structure to store decoded instruction
+ * @buf: Buffer containing the instruction bytes
+ * @buf_size: Number of instruction bytes available in buf
+ *
+ * Decodes the instruction provided in buf and stores the decoding results in
+ * insn. Also determines the correct address and operand sizes.
+ *
+ * Returns:
+ *
+ * True if instruction was decoded, False otherwise.
+ */
+bool insn_decode(struct pt_regs *regs, struct insn *insn,
+ unsigned char buf[MAX_INSN_SIZE], int buf_size)
+{
+ int seg_defs;
+
+ insn_init(insn, buf, buf_size, user_64bit_mode(regs));
+
+ /*
+ * Override the default operand and address sizes with what is specified
+ * in the code segment descriptor. The instruction decoder only sets
+ * the address size it to either 4 or 8 address bytes and does nothing
+ * for the operand bytes. This OK for most of the cases, but we could
+ * have special cases where, for instance, a 16-bit code segment
+ * descriptor is used.
+ * If there is an address override prefix, the instruction decoder
+ * correctly updates these values, even for 16-bit defaults.
+ */
+ seg_defs = insn_get_code_seg_params(regs);
+ if (seg_defs == -EINVAL)
+ return false;
+
+ insn->addr_bytes = INSN_CODE_SEG_ADDR_SZ(seg_defs);
+ insn->opnd_bytes = INSN_CODE_SEG_OPND_SZ(seg_defs);
+
+ insn_get_length(insn);
+ if (buf_size < insn->length)
+ return false;
+
+ return true;
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 09/75] x86/insn: Add insn_get_modrm_reg_off()
From: Joerg Roedel <jroedel at suse.de>
Add a function to the instruction decoder which returns the pt_regs
offset of the register specified in the reg field of the modrm byte.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
Acked-by: Masami Hiramatsu <mhiramat at kernel.org>
---
arch/x86/include/asm/insn-eval.h | 1 +
arch/x86/lib/insn-eval.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
index b4ff3e3316d1..1e343010129e 100644
--- a/arch/x86/include/asm/insn-eval.h
+++ b/arch/x86/include/asm/insn-eval.h
@@ -17,6 +17,7 @@
void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs);
int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
+int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx);
int insn_get_code_seg_params(struct pt_regs *regs);
int insn_fetch_from_user(struct pt_regs *regs,
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 0bbb814d4851..371da15f1343 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -20,6 +20,7 @@
enum reg_type {
REG_TYPE_RM = 0,
+ REG_TYPE_REG,
REG_TYPE_INDEX,
REG_TYPE_BASE,
};
@@ -441,6 +442,13 @@ static int get_reg_offset(struct insn *insn, struct pt_regs
*regs,
regno += 8;
break;
+ case REG_TYPE_REG:
+ regno = X86_MODRM_REG(insn->modrm.value);
+
+ if (X86_REX_R(insn->rex_prefix.value))
+ regno += 8;
+ break;
+
case REG_TYPE_INDEX:
regno = X86_SIB_INDEX(insn->sib.value);
if (X86_REX_X(insn->rex_prefix.value))
@@ -809,6 +817,21 @@ int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs
*regs)
return get_reg_offset(insn, regs, REG_TYPE_RM);
}
+/**
+ * insn_get_modrm_reg_off() - Obtain register in reg part of the ModRM byte
+ * @insn: Instruction containing the ModRM byte
+ * @regs: Register values as seen when entering kernel mode
+ *
+ * Returns:
+ *
+ * The register indicated by the reg part of the ModRM byte. The
+ * register is obtained as an offset from the base of pt_regs.
+ */
+int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs)
+{
+ return get_reg_offset(insn, regs, REG_TYPE_REG);
+}
+
/**
* get_seg_base_limit() - obtain base address and limit of a segment
* @insn: Instruction. Must be valid.
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 10/75] x86/insn: Add insn_rep_prefix() helper
From: Joerg Roedel <jroedel at suse.de>
Add a function to check whether an instruction has a REP prefix.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/insn-eval.h | 1 +
arch/x86/lib/insn-eval.c | 24 ++++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/arch/x86/include/asm/insn-eval.h b/arch/x86/include/asm/insn-eval.h
index 1e343010129e..a63b29466032 100644
--- a/arch/x86/include/asm/insn-eval.h
+++ b/arch/x86/include/asm/insn-eval.h
@@ -15,6 +15,7 @@
#define INSN_CODE_SEG_OPND_SZ(params) (params & 0xf)
#define INSN_CODE_SEG_PARAMS(oper_sz, addr_sz) (oper_sz | (addr_sz << 4))
+bool insn_has_rep_prefix(struct insn *insn);
void __user *insn_get_addr_ref(struct insn *insn, struct pt_regs *regs);
int insn_get_modrm_rm_off(struct insn *insn, struct pt_regs *regs);
int insn_get_modrm_reg_off(struct insn *insn, struct pt_regs *regs);
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 371da15f1343..18e33dff6aae 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -53,6 +53,30 @@ static bool is_string_insn(struct insn *insn)
}
}
+/**
+ * insn_has_rep_prefix() - Determine if instruction has a REP prefix
+ * @insn: Instruction containing the prefix to inspect
+ *
+ * Returns:
+ *
+ * true if the instruction has a REP prefix, false if not.
+ */
+bool insn_has_rep_prefix(struct insn *insn)
+{
+ int i;
+
+ insn_get_prefixes(insn);
+
+ for (i = 0; i < insn->prefixes.nbytes; i++) {
+ insn_byte_t p = insn->prefixes.bytes[i];
+
+ if (p == 0xf2 || p == 0xf3)
+ return true;
+ }
+
+ return false;
+}
+
/**
* get_seg_reg_override_idx() - obtain segment register override index
* @insn: Valid instruction with segment override prefixes
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 11/75] x86/boot/compressed/64: Disable red-zone usage
From: Joerg Roedel <jroedel at suse.de> The x86-64 ABI defines a red-zone on the stack: The 128-byte area beyond the location pointed to by %rsp is considered to be reserved and shall not be modified by signal or interrupt handlers. Therefore, functions may use this area for temporary data that is not needed across function calls. In particular, leaf functions may use this area for their entire stack frame, rather than adjusting the stack pointer in the prologue and epilogue. This area is known as the red zone. This is not compatible with exception handling, because the IRET frame written by the hardware at the stack pointer and the functions to handle the exception will overwrite the temporary variables of the interrupted function, causing undefined behavior. So disable red-zones for the pre-decompression boot code. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/boot/Makefile | 2 +- arch/x86/boot/compressed/Makefile | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index e17be90ab312..93f1320fc7bf 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -65,7 +65,7 @@ clean-files += cpustr.h # --------------------------------------------------------------------------- -KBUILD_CFLAGS := $(REALMODE_CFLAGS) -D_SETUP +KBUILD_CFLAGS := $(REALMODE_CFLAGS) -D_SETUP -mno-red-zone KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) KBUILD_CFLAGS += -fno-asynchronous-unwind-tables diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 5f7c262bcc99..085d5f083f50 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -30,7 +30,7 @@ KBUILD_CFLAGS := -m$(BITS) -O2 KBUILD_CFLAGS += -fno-strict-aliasing $(call cc-option, -fPIE, -fPIC) KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING cflags-$(CONFIG_X86_32) := -march=i386 -cflags-$(CONFIG_X86_64) := -mcmodel=small +cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone KBUILD_CFLAGS += $(cflags-y) KBUILD_CFLAGS += -mno-mmx -mno-sse KBUILD_CFLAGS += $(call cc-option,-ffreestanding) -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 12/75] x86/boot/compressed/64: Switch to __KERNEL_CS after GDT is loaded
From: Joerg Roedel <jroedel at suse.de> When the pre-decompression code loads its first GDT in startup_64, it is still running on the CS value of the previous GDT. In the case of SEV-ES this is the EFI GDT. To make exception handling work (especially IRET) the CPU needs to switch to a CS value in the current GDT, so jump to __KERNEL_CS after the first GDT is loaded. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/boot/compressed/head_64.S | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 4f7e6b84be07..6b11060c3a0f 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -393,6 +393,14 @@ SYM_CODE_START(startup_64) addq %rax, 2(%rax) lgdt (%rax) + /* Reload CS so IRET returns to a CS actually in the GDT */ + pushq $__KERNEL_CS + leaq .Lon_kernel_cs(%rip), %rax + pushq %rax + lretq + +.Lon_kernel_cs: + /* * paging_prepare() sets up the trampoline and checks if we need to * enable 5-level paging. -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 13/75] x86/boot/compressed/64: Add IDT Infrastructure
From: Joerg Roedel <jroedel at suse.de>
Add code needed to setup an IDT in the early pre-decompression
boot-code. The IDT is loaded first in startup_64, which is after
EfiExitBootServices() has been called, and later reloaded when the
kernel image has been relocated to the end of the decompression area.
This allows to setup different IDT handlers before and after the
relocation.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/Makefile | 1 +
arch/x86/boot/compressed/head_64.S | 25 +++++++-
arch/x86/boot/compressed/idt_64.c | 43 ++++++++++++++
arch/x86/boot/compressed/idt_handlers_64.S | 69 ++++++++++++++++++++++
arch/x86/boot/compressed/misc.h | 5 ++
arch/x86/include/asm/desc_defs.h | 3 +
6 files changed, 145 insertions(+), 1 deletion(-)
create mode 100644 arch/x86/boot/compressed/idt_64.c
create mode 100644 arch/x86/boot/compressed/idt_handlers_64.S
diff --git a/arch/x86/boot/compressed/Makefile
b/arch/x86/boot/compressed/Makefile
index 085d5f083f50..954842333d1d 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -82,6 +82,7 @@ vmlinux-objs-$(CONFIG_EARLY_PRINTK) +=
$(obj)/early_serial_console.o
vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o
ifdef CONFIG_X86_64
vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr_64.o
+ vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
vmlinux-objs-y += $(obj)/mem_encrypt.o
vmlinux-objs-y += $(obj)/pgtable_64.o
endif
diff --git a/arch/x86/boot/compressed/head_64.S
b/arch/x86/boot/compressed/head_64.S
index 6b11060c3a0f..089b9e676498 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -33,6 +33,7 @@
#include <asm/processor-flags.h>
#include <asm/asm-offsets.h>
#include <asm/bootparam.h>
+#include <asm/desc_defs.h>
#include "pgtable.h"
/*
@@ -401,6 +402,10 @@ SYM_CODE_START(startup_64)
.Lon_kernel_cs:
+ pushq %rsi
+ call load_stage1_idt
+ popq %rsi
+
/*
* paging_prepare() sets up the trampoline and checks if we need to
* enable 5-level paging.
@@ -528,6 +533,13 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated)
shrq $3, %rcx
rep stosq
+/*
+ * Load stage2 IDT
+ */
+ pushq %rsi
+ call load_stage2_idt
+ popq %rsi
+
/*
* Do the extraction, and jump to the new kernel..
*/
@@ -681,10 +693,21 @@ SYM_DATA_START_LOCAL(gdt)
.quad 0x0000000000000000 /* TS continued */
SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end)
+SYM_DATA_START(boot_idt_desc)
+ .word boot_idt_end - boot_idt
+ .quad 0
+SYM_DATA_END(boot_idt_desc)
+ .balign 8
+SYM_DATA_START(boot_idt)
+ .rept BOOT_IDT_ENTRIES
+ .quad 0
+ .quad 0
+ .endr
+SYM_DATA_END_LABEL(boot_idt, SYM_L_GLOBAL, boot_idt_end)
+
#ifdef CONFIG_EFI_STUB
SYM_DATA(image_offset, .long 0)
#endif
-
#ifdef CONFIG_EFI_MIXED
SYM_DATA_LOCAL(efi32_boot_args, .long 0, 0, 0)
SYM_DATA(efi_is64, .byte 1)
diff --git a/arch/x86/boot/compressed/idt_64.c
b/arch/x86/boot/compressed/idt_64.c
new file mode 100644
index 000000000000..46ecea671b90
--- /dev/null
+++ b/arch/x86/boot/compressed/idt_64.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <asm/trap_defs.h>
+#include <asm/segment.h>
+#include "misc.h"
+
+static void set_idt_entry(int vector, void (*handler)(void))
+{
+ unsigned long address = (unsigned long)handler;
+ gate_desc entry;
+
+ memset(&entry, 0, sizeof(entry));
+
+ entry.offset_low = (u16)(address & 0xffff);
+ entry.segment = __KERNEL_CS;
+ entry.bits.type = GATE_TRAP;
+ entry.bits.p = 1;
+ entry.offset_middle = (u16)((address >> 16) & 0xffff);
+ entry.offset_high = (u32)(address >> 32);
+
+ memcpy(&boot_idt[vector], &entry, sizeof(entry));
+}
+
+/* Have this here so we don't need to include <asm/desc.h> */
+static void load_boot_idt(const struct desc_ptr *dtr)
+{
+ asm volatile("lidt %0"::"m" (*dtr));
+}
+
+/* Setup IDT before kernel jumping to .Lrelocated */
+void load_stage1_idt(void)
+{
+ boot_idt_desc.address = (unsigned long)boot_idt;
+
+ load_boot_idt(&boot_idt_desc);
+}
+
+/* Setup IDT after kernel jumping to .Lrelocated */
+void load_stage2_idt(void)
+{
+ boot_idt_desc.address = (unsigned long)boot_idt;
+
+ load_boot_idt(&boot_idt_desc);
+}
diff --git a/arch/x86/boot/compressed/idt_handlers_64.S
b/arch/x86/boot/compressed/idt_handlers_64.S
new file mode 100644
index 000000000000..f86ea872d860
--- /dev/null
+++ b/arch/x86/boot/compressed/idt_handlers_64.S
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Early IDT handler entry points
+ *
+ * Copyright (C) 2019 SUSE
+ *
+ * Author: Joerg Roedel <jroedel at suse.de>
+ */
+
+#include <asm/segment.h>
+
+#include "../../entry/calling.h"
+
+.macro EXCEPTION_HANDLER name function error_code=0
+SYM_FUNC_START(\name)
+
+ /* Build pt_regs */
+ .if \error_code == 0
+ pushq $0
+ .endif
+
+ pushq %rdi
+ pushq %rsi
+ pushq %rdx
+ pushq %rcx
+ pushq %rax
+ pushq %r8
+ pushq %r9
+ pushq %r10
+ pushq %r11
+ pushq %rbx
+ pushq %rbp
+ pushq %r12
+ pushq %r13
+ pushq %r14
+ pushq %r15
+
+ /* Call handler with pt_regs */
+ movq %rsp, %rdi
+ /* Error code is second parameter */
+ movq ORIG_RAX(%rsp), %rsi
+ call \function
+
+ /* Restore regs */
+ popq %r15
+ popq %r14
+ popq %r13
+ popq %r12
+ popq %rbp
+ popq %rbx
+ popq %r11
+ popq %r10
+ popq %r9
+ popq %r8
+ popq %rax
+ popq %rcx
+ popq %rdx
+ popq %rsi
+ popq %rdi
+
+ /* Remove error code and return */
+ addq $8, %rsp
+
+ iretq
+SYM_FUNC_END(\name)
+ .endm
+
+ .text
+ .code64
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 726e264410ff..062ae3ae6930 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -23,6 +23,7 @@
#include <asm/page.h>
#include <asm/boot.h>
#include <asm/bootparam.h>
+#include <asm/desc_defs.h>
#define BOOT_CTYPE_H
#include <linux/acpi.h>
@@ -133,4 +134,8 @@ int count_immovable_mem_regions(void);
static inline int count_immovable_mem_regions(void) { return 0; }
#endif
+/* idt_64.c */
+extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
+extern struct desc_ptr boot_idt_desc;
+
#endif /* BOOT_COMPRESSED_MISC_H */
diff --git a/arch/x86/include/asm/desc_defs.h b/arch/x86/include/asm/desc_defs.h
index a91f3b6e4f2a..5621fb3f2d1a 100644
--- a/arch/x86/include/asm/desc_defs.h
+++ b/arch/x86/include/asm/desc_defs.h
@@ -109,6 +109,9 @@ struct desc_ptr {
#endif /* !__ASSEMBLY__ */
+/* Boot IDT definitions */
+#define BOOT_IDT_ENTRIES 32
+
/* Access rights as returned by LAR */
#define AR_TYPE_RODATA (0 * (1 << 9))
#define AR_TYPE_RWDATA (1 * (1 << 9))
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 14/75] x86/boot/compressed/64: Rename kaslr_64.c to ident_map_64.c
From: Joerg Roedel <jroedel at suse.de>
The file contains only code related to identity mapped page-tables.
Rename the file and compile it always in.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/Makefile | 2 +-
.../boot/compressed/{kaslr_64.c => ident_map_64.c} | 12 ++++++++++++
arch/x86/boot/compressed/kaslr.c | 9 ---------
arch/x86/boot/compressed/misc.h | 8 ++++++++
4 files changed, 21 insertions(+), 10 deletions(-)
rename arch/x86/boot/compressed/{kaslr_64.c => ident_map_64.c} (93%)
diff --git a/arch/x86/boot/compressed/Makefile
b/arch/x86/boot/compressed/Makefile
index 954842333d1d..c6909d10a6b9 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -81,7 +81,7 @@ vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o
$(obj)/head_$(BITS).o
vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o
vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o
ifdef CONFIG_X86_64
- vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr_64.o
+ vmlinux-objs-y += $(obj)/ident_map_64.o
vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
vmlinux-objs-y += $(obj)/mem_encrypt.o
vmlinux-objs-y += $(obj)/pgtable_64.o
diff --git a/arch/x86/boot/compressed/kaslr_64.c
b/arch/x86/boot/compressed/ident_map_64.c
similarity index 93%
rename from arch/x86/boot/compressed/kaslr_64.c
rename to arch/x86/boot/compressed/ident_map_64.c
index 9557c5a15b91..3a2115582920 100644
--- a/arch/x86/boot/compressed/kaslr_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -29,6 +29,18 @@
#define __PAGE_OFFSET __PAGE_OFFSET_BASE
#include "../../mm/ident_map.c"
+#ifdef CONFIG_X86_5LEVEL
+unsigned int __pgtable_l5_enabled;
+unsigned int pgdir_shift = 39;
+unsigned int ptrs_per_p4d = 1;
+#endif
+
+/* Used by PAGE_KERN* macros: */
+pteval_t __default_kernel_pte_mask __read_mostly = ~0;
+
+/* Used by pgtable.h asm code to force instruction serialization. */
+unsigned long __force_order;
+
/* Used to track our page table allocation area. */
struct alloc_pgt_data {
unsigned char *pgt_buf;
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index d7408af55738..7c61a8c5b9cf 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -43,17 +43,8 @@
#define STATIC
#include <linux/decompress/mm.h>
-#ifdef CONFIG_X86_5LEVEL
-unsigned int __pgtable_l5_enabled;
-unsigned int pgdir_shift __ro_after_init = 39;
-unsigned int ptrs_per_p4d __ro_after_init = 1;
-#endif
-
extern unsigned long get_cmd_line_ptr(void);
-/* Used by PAGE_KERN* macros: */
-pteval_t __default_kernel_pte_mask __read_mostly = ~0;
-
/* Simplified build-specific string for starting entropy. */
static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY
"@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION;
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 062ae3ae6930..3a030a878d53 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -134,6 +134,14 @@ int count_immovable_mem_regions(void);
static inline int count_immovable_mem_regions(void) { return 0; }
#endif
+/* ident_map_64.c */
+#ifdef CONFIG_X86_5LEVEL
+extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
+#endif
+
+/* Used by PAGE_KERN* macros: */
+extern pteval_t __default_kernel_pte_mask;
+
/* idt_64.c */
extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
extern struct desc_ptr boot_idt_desc;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 15/75] x86/boot/compressed/64: Add page-fault handler
From: Joerg Roedel <jroedel at suse.de>
Install a page-fault handler to add an identity mapping to addresses
not yet mapped. Also do some checking whether the error code is sane.
This makes non SEV-ES machines use the exception handling
infrastructure in the pre-decompressions boot code too, making it less
likely to break in the future.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 33 ++++++++++++++++++++++
arch/x86/boot/compressed/idt_64.c | 2 ++
arch/x86/boot/compressed/idt_handlers_64.S | 2 ++
arch/x86/boot/compressed/misc.h | 6 ++++
4 files changed, 43 insertions(+)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 3a2115582920..33bdf923cbab 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -19,11 +19,13 @@
/* No PAGE_TABLE_ISOLATION support needed either: */
#undef CONFIG_PAGE_TABLE_ISOLATION
+#include "error.h"
#include "misc.h"
/* These actually do the work of building the kernel identity maps. */
#include <asm/init.h>
#include <asm/pgtable.h>
+#include <asm/trap_defs.h>
/* Use the static base for this part of the boot process */
#undef __PAGE_OFFSET
#define __PAGE_OFFSET __PAGE_OFFSET_BASE
@@ -163,3 +165,34 @@ void finalize_identity_maps(void)
{
write_cr3(top_level_pgt);
}
+
+void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
+{
+ unsigned long address = native_read_cr2();
+
+ /*
+ * Check for unexpected error codes. Unexpected are:
+ * - Faults on present pages
+ * - User faults
+ * - Reserved bits set
+ */
+ if (error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) {
+ /* Print some information for debugging */
+ error_putstr("Unexpected page-fault:");
+ error_putstr("\nError Code: ");
+ error_puthex(error_code);
+ error_putstr("\nCR2: 0x");
+ error_puthex(address);
+ error_putstr("\nRIP relative to _head: 0x");
+ error_puthex(regs->ip - (unsigned long)_head);
+ error_putstr("\n");
+
+ error("Stopping.\n");
+ }
+
+ /*
+ * Error code is sane - now identity map the 2M region around
+ * the faulting address.
+ */
+ add_identity_map(address & PMD_MASK, PMD_SIZE);
+}
diff --git a/arch/x86/boot/compressed/idt_64.c
b/arch/x86/boot/compressed/idt_64.c
index 46ecea671b90..99cc78062684 100644
--- a/arch/x86/boot/compressed/idt_64.c
+++ b/arch/x86/boot/compressed/idt_64.c
@@ -39,5 +39,7 @@ void load_stage2_idt(void)
{
boot_idt_desc.address = (unsigned long)boot_idt;
+ set_idt_entry(X86_TRAP_PF, boot_page_fault);
+
load_boot_idt(&boot_idt_desc);
}
diff --git a/arch/x86/boot/compressed/idt_handlers_64.S
b/arch/x86/boot/compressed/idt_handlers_64.S
index f86ea872d860..eda50cbdafa0 100644
--- a/arch/x86/boot/compressed/idt_handlers_64.S
+++ b/arch/x86/boot/compressed/idt_handlers_64.S
@@ -67,3 +67,5 @@ SYM_FUNC_END(\name)
.text
.code64
+
+EXCEPTION_HANDLER boot_page_fault do_boot_page_fault error_code=1
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 3a030a878d53..345c90fbc500 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -37,6 +37,9 @@
#define memptr unsigned
#endif
+/* boot/compressed/vmlinux start and end markers */
+extern char _head[], _end[];
+
/* misc.c */
extern memptr free_mem_ptr;
extern memptr free_mem_end_ptr;
@@ -146,4 +149,7 @@ extern pteval_t __default_kernel_pte_mask;
extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
extern struct desc_ptr boot_idt_desc;
+/* IDT Entry Points */
+void boot_page_fault(void);
+
#endif /* BOOT_COMPRESSED_MISC_H */
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 16/75] x86/boot/compressed/64: Always switch to own page-table
From: Joerg Roedel <jroedel at suse.de>
When booted through startup_64 the kernel keeps running on the EFI
page-table until the KASLR code sets up its own page-table. Without
KASLR the pre-decompression boot code never switches off the EFI
page-table. Change that by unconditionally switching to a kernel
controlled page-table after relocation.
This makes sure we can make changes to the mapping when necessary, for
example map pages unencrypted in SEV and SEV-ES guests.
Also remove the debug_putstr() calls in initialize_identity_maps()
because the function now runs before console_init() is called.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/head_64.S | 3 +-
arch/x86/boot/compressed/ident_map_64.c | 51 +++++++++++++++----------
arch/x86/boot/compressed/kaslr.c | 3 --
3 files changed, 32 insertions(+), 25 deletions(-)
diff --git a/arch/x86/boot/compressed/head_64.S
b/arch/x86/boot/compressed/head_64.S
index 089b9e676498..af571127c9ba 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -534,10 +534,11 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated)
rep stosq
/*
- * Load stage2 IDT
+ * Load stage2 IDT and switch to our own page-table
*/
pushq %rsi
call load_stage2_idt
+ call initialize_identity_maps
popq %rsi
/*
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 33bdf923cbab..aa55e7b5cade 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -88,9 +88,31 @@ phys_addr_t physical_mask = (1ULL <<
__PHYSICAL_MASK_SHIFT) - 1;
*/
static struct x86_mapping_info mapping_info;
+/*
+ * Adds the specified range to what will become the new identity mappings.
+ * Once all ranges have been added, the new mapping is activated by calling
+ * finalize_identity_maps() below.
+ */
+void add_identity_map(unsigned long start, unsigned long size)
+{
+ unsigned long end = start + size;
+
+ /* Align boundary to 2M. */
+ start = round_down(start, PMD_SIZE);
+ end = round_up(end, PMD_SIZE);
+ if (start >= end)
+ return;
+
+ /* Build the mapping. */
+ kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt,
+ start, end);
+}
+
/* Locates and clears a region for a new top level page table. */
void initialize_identity_maps(void)
{
+ unsigned long start, size;
+
/* If running as an SEV guest, the encryption mask is required. */
set_sev_encryption_mask();
@@ -123,37 +145,24 @@ void initialize_identity_maps(void)
*/
top_level_pgt = read_cr3_pa();
if (p4d_offset((pgd_t *)top_level_pgt, 0) == (p4d_t *)_pgtable) {
- debug_putstr("booted via startup_32()\n");
pgt_data.pgt_buf = _pgtable + BOOT_INIT_PGT_SIZE;
pgt_data.pgt_buf_size = BOOT_PGT_SIZE - BOOT_INIT_PGT_SIZE;
memset(pgt_data.pgt_buf, 0, pgt_data.pgt_buf_size);
} else {
- debug_putstr("booted via startup_64()\n");
pgt_data.pgt_buf = _pgtable;
pgt_data.pgt_buf_size = BOOT_PGT_SIZE;
memset(pgt_data.pgt_buf, 0, pgt_data.pgt_buf_size);
top_level_pgt = (unsigned long)alloc_pgt_page(&pgt_data);
}
-}
-/*
- * Adds the specified range to what will become the new identity mappings.
- * Once all ranges have been added, the new mapping is activated by calling
- * finalize_identity_maps() below.
- */
-void add_identity_map(unsigned long start, unsigned long size)
-{
- unsigned long end = start + size;
-
- /* Align boundary to 2M. */
- start = round_down(start, PMD_SIZE);
- end = round_up(end, PMD_SIZE);
- if (start >= end)
- return;
-
- /* Build the mapping. */
- kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt,
- start, end);
+ /*
+ * New page-table is set up - map the kernel image and load it
+ * into cr3.
+ */
+ start = (unsigned long)_head;
+ size = _end - _head;
+ add_identity_map(start, size);
+ write_cr3(top_level_pgt);
}
/*
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 7c61a8c5b9cf..856dc1c9bb0d 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -903,9 +903,6 @@ void choose_random_location(unsigned long input,
boot_params->hdr.loadflags |= KASLR_FLAG;
- /* Prepare to add new identity pagetables on demand. */
- initialize_identity_maps();
-
/* Record the various known unsafe memory ranges. */
mem_avoid_init(input, input_size, *output);
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 17/75] x86/boot/compressed/64: Don't pre-map memory in KASLR code
From: Joerg Roedel <jroedel at suse.de>
With the page-fault handler in place the identity mapping can be built
on-demand. So remove the code which manually creates the mappings and
unexport/remove the functions used for it.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 16 ++--------------
arch/x86/boot/compressed/kaslr.c | 24 +-----------------------
arch/x86/boot/compressed/misc.h | 10 ----------
3 files changed, 3 insertions(+), 47 deletions(-)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index aa55e7b5cade..9f6606184797 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -89,11 +89,9 @@ phys_addr_t physical_mask = (1ULL <<
__PHYSICAL_MASK_SHIFT) - 1;
static struct x86_mapping_info mapping_info;
/*
- * Adds the specified range to what will become the new identity mappings.
- * Once all ranges have been added, the new mapping is activated by calling
- * finalize_identity_maps() below.
+ * Adds the specified range to the identity mappings.
*/
-void add_identity_map(unsigned long start, unsigned long size)
+static void add_identity_map(unsigned long start, unsigned long size)
{
unsigned long end = start + size;
@@ -165,16 +163,6 @@ void initialize_identity_maps(void)
write_cr3(top_level_pgt);
}
-/*
- * This switches the page tables to the new level4 that has been built
- * via calls to add_identity_map() above. If booted via startup_32(),
- * this is effectively a no-op.
- */
-void finalize_identity_maps(void)
-{
- write_cr3(top_level_pgt);
-}
-
void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
{
unsigned long address = native_read_cr2();
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 856dc1c9bb0d..c466fb738de0 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -399,8 +399,6 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
*/
mem_avoid[MEM_AVOID_ZO_RANGE].start = input;
mem_avoid[MEM_AVOID_ZO_RANGE].size = (output + init_size) - input;
- add_identity_map(mem_avoid[MEM_AVOID_ZO_RANGE].start,
- mem_avoid[MEM_AVOID_ZO_RANGE].size);
/* Avoid initrd. */
initrd_start = (u64)boot_params->ext_ramdisk_image << 32;
@@ -420,14 +418,10 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
;
mem_avoid[MEM_AVOID_CMDLINE].start = cmd_line;
mem_avoid[MEM_AVOID_CMDLINE].size = cmd_line_size;
- add_identity_map(mem_avoid[MEM_AVOID_CMDLINE].start,
- mem_avoid[MEM_AVOID_CMDLINE].size);
/* Avoid boot parameters. */
mem_avoid[MEM_AVOID_BOOTPARAMS].start = (unsigned long)boot_params;
mem_avoid[MEM_AVOID_BOOTPARAMS].size = sizeof(*boot_params);
- add_identity_map(mem_avoid[MEM_AVOID_BOOTPARAMS].start,
- mem_avoid[MEM_AVOID_BOOTPARAMS].size);
/* We don't need to set a mapping for setup_data. */
@@ -436,11 +430,6 @@ static void mem_avoid_init(unsigned long input, unsigned
long input_size,
/* Enumerate the immovable memory regions */
num_immovable_mem = count_immovable_mem_regions();
-
-#ifdef CONFIG_X86_VERBOSE_BOOTUP
- /* Make sure video RAM can be used. */
- add_identity_map(0, PMD_SIZE);
-#endif
}
/*
@@ -919,19 +908,8 @@ void choose_random_location(unsigned long input,
warn("Physical KASLR disabled: no suitable memory region!");
} else {
/* Update the new physical address location. */
- if (*output != random_addr) {
- add_identity_map(random_addr, output_size);
+ if (*output != random_addr)
*output = random_addr;
- }
-
- /*
- * This loads the identity mapping page table.
- * This should only be done if a new physical address
- * is found for the kernel, otherwise we should keep
- * the old page table to make it be like the "nokaslr"
- * case.
- */
- finalize_identity_maps();
}
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 345c90fbc500..ea6174bad699 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -98,17 +98,7 @@ static inline void choose_random_location(unsigned long
input,
#endif
#ifdef CONFIG_X86_64
-void initialize_identity_maps(void);
-void add_identity_map(unsigned long start, unsigned long size);
-void finalize_identity_maps(void);
extern unsigned char _pgtable[];
-#else
-static inline void initialize_identity_maps(void)
-{ }
-static inline void add_identity_map(unsigned long start, unsigned long size)
-{ }
-static inline void finalize_identity_maps(void)
-{ }
#endif
#ifdef CONFIG_EARLY_PRINTK
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 18/75] x86/boot/compressed/64: Change add_identity_map() to take start and end
From: Joerg Roedel <jroedel at suse.de>
Changing the function to take start and end as parameters instead of
start and size simplifies the callers, which don't need to calculate
the size if they already have start and end.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 9f6606184797..83385a551f01 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -91,10 +91,8 @@ static struct x86_mapping_info mapping_info;
/*
* Adds the specified range to the identity mappings.
*/
-static void add_identity_map(unsigned long start, unsigned long size)
+static void add_identity_map(unsigned long start, unsigned long end)
{
- unsigned long end = start + size;
-
/* Align boundary to 2M. */
start = round_down(start, PMD_SIZE);
end = round_up(end, PMD_SIZE);
@@ -109,8 +107,6 @@ static void add_identity_map(unsigned long start, unsigned
long size)
/* Locates and clears a region for a new top level page table. */
void initialize_identity_maps(void)
{
- unsigned long start, size;
-
/* If running as an SEV guest, the encryption mask is required. */
set_sev_encryption_mask();
@@ -157,15 +153,14 @@ void initialize_identity_maps(void)
* New page-table is set up - map the kernel image and load it
* into cr3.
*/
- start = (unsigned long)_head;
- size = _end - _head;
- add_identity_map(start, size);
+ add_identity_map((unsigned long)_head, (unsigned long)_end);
write_cr3(top_level_pgt);
}
void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
{
- unsigned long address = native_read_cr2();
+ unsigned long address = native_read_cr2() & PMD_MASK;
+ unsigned long end = address + PMD_SIZE;
/*
* Check for unexpected error codes. Unexpected are:
@@ -191,5 +186,5 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long
error_code)
* Error code is sane - now identity map the 2M region around
* the faulting address.
*/
- add_identity_map(address & PMD_MASK, PMD_SIZE);
+ add_identity_map(address, end);
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 19/75] x86/boot/compressed/64: Add stage1 #VC handler
From: Joerg Roedel <jroedel at suse.de>
Add the first handler for #VC exceptions. At stage 1 there is no GHCB
yet becaue we might still be on the EFI page table and thus can't map
memory unencrypted.
The stage 1 handler is limited to the MSR based protocol to talk to
the hypervisor and can only support CPUID exit-codes, but that is
enough to get to stage 2.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/Makefile | 1 +
arch/x86/boot/compressed/idt_64.c | 4 ++
arch/x86/boot/compressed/idt_handlers_64.S | 4 ++
arch/x86/boot/compressed/misc.h | 1 +
arch/x86/boot/compressed/sev-es.c | 45 +++++++++++++++
arch/x86/include/asm/msr-index.h | 1 +
arch/x86/include/asm/sev-es.h | 37 ++++++++++++
arch/x86/include/asm/trap_defs.h | 1 +
arch/x86/kernel/sev-es-shared.c | 65 ++++++++++++++++++++++
9 files changed, 159 insertions(+)
create mode 100644 arch/x86/boot/compressed/sev-es.c
create mode 100644 arch/x86/include/asm/sev-es.h
create mode 100644 arch/x86/kernel/sev-es-shared.c
diff --git a/arch/x86/boot/compressed/Makefile
b/arch/x86/boot/compressed/Makefile
index c6909d10a6b9..a7847a1ef63a 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -85,6 +85,7 @@ ifdef CONFIG_X86_64
vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
vmlinux-objs-y += $(obj)/mem_encrypt.o
vmlinux-objs-y += $(obj)/pgtable_64.o
+ vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev-es.o
endif
vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
diff --git a/arch/x86/boot/compressed/idt_64.c
b/arch/x86/boot/compressed/idt_64.c
index 99cc78062684..f8295d68b3e1 100644
--- a/arch/x86/boot/compressed/idt_64.c
+++ b/arch/x86/boot/compressed/idt_64.c
@@ -31,6 +31,10 @@ void load_stage1_idt(void)
{
boot_idt_desc.address = (unsigned long)boot_idt;
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ set_idt_entry(X86_TRAP_VC, boot_stage1_vc);
+#endif
+
load_boot_idt(&boot_idt_desc);
}
diff --git a/arch/x86/boot/compressed/idt_handlers_64.S
b/arch/x86/boot/compressed/idt_handlers_64.S
index eda50cbdafa0..8473bf88e64e 100644
--- a/arch/x86/boot/compressed/idt_handlers_64.S
+++ b/arch/x86/boot/compressed/idt_handlers_64.S
@@ -69,3 +69,7 @@ SYM_FUNC_END(\name)
.code64
EXCEPTION_HANDLER boot_page_fault do_boot_page_fault error_code=1
+
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+EXCEPTION_HANDLER boot_stage1_vc do_vc_no_ghcb error_code=1
+#endif
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index ea6174bad699..65da40777bc1 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -141,5 +141,6 @@ extern struct desc_ptr boot_idt_desc;
/* IDT Entry Points */
void boot_page_fault(void);
+void boot_stage1_vc(void);
#endif /* BOOT_COMPRESSED_MISC_H */
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
new file mode 100644
index 000000000000..bb91cbb5920e
--- /dev/null
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD Encrypted Register State Support
+ *
+ * Author: Joerg Roedel <jroedel at suse.de>
+ */
+
+/*
+ * misc.h needs to be first because it knows how to include the other kernel
+ * headers in the pre-decompression code in a way that does not break
+ * compilation.
+ */
+#include "misc.h"
+
+#include <asm/sev-es.h>
+#include <asm/msr-index.h>
+#include <asm/ptrace.h>
+#include <asm/svm.h>
+
+static inline u64 sev_es_rd_ghcb_msr(void)
+{
+ unsigned long low, high;
+
+ asm volatile("rdmsr\n" : "=a" (low), "=d" (high)
:
+ "c" (MSR_AMD64_SEV_ES_GHCB));
+
+ return ((high << 32) | low);
+}
+
+static inline void sev_es_wr_ghcb_msr(u64 val)
+{
+ u32 low, high;
+
+ low = val & 0xffffffffUL;
+ high = val >> 32;
+
+ asm volatile("wrmsr\n" : : "c" (MSR_AMD64_SEV_ES_GHCB),
+ "a"(low), "d" (high) : "memory");
+}
+
+#undef __init
+#define __init
+
+/* Include code for early handlers */
+#include "../../kernel/sev-es-shared.c"
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 12c9684d59ba..198aa06778ce 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -441,6 +441,7 @@
#define MSR_AMD64_IBSBRTARGET 0xc001103b
#define MSR_AMD64_IBSOPDATA4 0xc001103d
#define MSR_AMD64_IBS_REG_COUNT_MAX 8 /* includes MSR_AMD64_IBSBRTARGET */
+#define MSR_AMD64_SEV_ES_GHCB 0xc0010130
#define MSR_AMD64_SEV 0xc0010131
#define MSR_AMD64_SEV_ENABLED_BIT 0
#define MSR_AMD64_SEV_ENABLED BIT_ULL(MSR_AMD64_SEV_ENABLED_BIT)
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
new file mode 100644
index 000000000000..5d49a8a429d3
--- /dev/null
+++ b/arch/x86/include/asm/sev-es.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * AMD Encrypted Register State Support
+ *
+ * Author: Joerg Roedel <jroedel at suse.de>
+ */
+
+#ifndef __ASM_ENCRYPTED_STATE_H
+#define __ASM_ENCRYPTED_STATE_H
+
+#include <linux/types.h>
+
+#define GHCB_SEV_CPUID_REQ 0x004UL
+#define GHCB_CPUID_REQ_EAX 0
+#define GHCB_CPUID_REQ_EBX 1
+#define GHCB_CPUID_REQ_ECX 2
+#define GHCB_CPUID_REQ_EDX 3
+#define GHCB_CPUID_REQ(fn, reg) (GHCB_SEV_CPUID_REQ | \
+ (((unsigned long)reg & 3) << 30) | \
+ (((unsigned long)fn) << 32))
+
+#define GHCB_SEV_CPUID_RESP 0x005UL
+#define GHCB_SEV_TERMINATE 0x100UL
+
+#define GHCB_SEV_GHCB_RESP_CODE(v) ((v) & 0xfff)
+#define VMGEXIT() { asm volatile("rep; vmmcall\n\r"); }
+
+void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code);
+
+static inline u64 lower_bits(u64 val, unsigned int bits)
+{
+ u64 mask = (1ULL << bits) - 1;
+
+ return (val & mask);
+}
+
+#endif
diff --git a/arch/x86/include/asm/trap_defs.h b/arch/x86/include/asm/trap_defs.h
index 488f82ac36da..af45d65f0458 100644
--- a/arch/x86/include/asm/trap_defs.h
+++ b/arch/x86/include/asm/trap_defs.h
@@ -24,6 +24,7 @@ enum {
X86_TRAP_AC, /* 17, Alignment Check */
X86_TRAP_MC, /* 18, Machine Check */
X86_TRAP_XF, /* 19, SIMD Floating-Point Exception */
+ X86_TRAP_VC = 29, /* 29, VMM Communication Exception */
X86_TRAP_IRET = 32, /* 32, IRET Exception */
};
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
new file mode 100644
index 000000000000..5927152487ad
--- /dev/null
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD Encrypted Register State Support
+ *
+ * Author: Joerg Roedel <jroedel at suse.de>
+ *
+ * This file is not compiled stand-alone. It contains code shared
+ * between the pre-decompression boot code and the running Linux kernel
+ * and is included directly into both code-bases.
+ */
+
+/*
+ * Boot VC Handler - This is the first VC handler during boot, there is no GHCB
+ * page yet, so it only supports the MSR based communication with the
+ * hypervisor and only the CPUID exit-code.
+ */
+void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
+{
+ unsigned int fn = lower_bits(regs->ax, 32);
+ unsigned long val;
+
+ /* Only CPUID is supported via MSR protocol */
+ if (exit_code != SVM_EXIT_CPUID)
+ goto fail;
+
+ sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EAX));
+ VMGEXIT();
+ val = sev_es_rd_ghcb_msr();
+ if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP)
+ goto fail;
+ regs->ax = val >> 32;
+
+ sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EBX));
+ VMGEXIT();
+ val = sev_es_rd_ghcb_msr();
+ if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP)
+ goto fail;
+ regs->bx = val >> 32;
+
+ sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_ECX));
+ VMGEXIT();
+ val = sev_es_rd_ghcb_msr();
+ if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP)
+ goto fail;
+ regs->cx = val >> 32;
+
+ sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EDX));
+ VMGEXIT();
+ val = sev_es_rd_ghcb_msr();
+ if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP)
+ goto fail;
+ regs->dx = val >> 32;
+
+ regs->ip += 2;
+
+ return;
+
+fail:
+ sev_es_wr_ghcb_msr(GHCB_SEV_TERMINATE);
+ VMGEXIT();
+
+ /* Shouldn't get here - if we do halt the machine */
+ while (true)
+ asm volatile("hlt\n");
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 20/75] x86/boot/compressed/64: Call set_sev_encryption_mask earlier
From: Joerg Roedel <jroedel at suse.de>
Call set_sev_encryption_mask() while still on the stage 1 #VC-handler,
because the stage 2 handler needs our own page-tables to be set up, to
which calling set_sev_encryption_mask() is a prerequisite.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/head_64.S | 8 +++++++-
arch/x86/boot/compressed/ident_map_64.c | 3 ---
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/boot/compressed/head_64.S
b/arch/x86/boot/compressed/head_64.S
index af571127c9ba..940d44149a29 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -534,9 +534,15 @@ SYM_FUNC_START_LOCAL_NOALIGN(.Lrelocated)
rep stosq
/*
- * Load stage2 IDT and switch to our own page-table
+ * If running as an SEV guest, the encryption mask is required in the
+ * page-table setup code below. When the guest also has SEV-ES enabled
+ * set_sev_encryption_mask() will cause #VC exceptions, but the stage2
+ * handler can't map its GHCB because the page-table is not set up yet.
+ * So set up the encryption mask here while still on the stage1 #VC
+ * handler. Then load stage2 IDT and switch to our own page-table.
*/
pushq %rsi
+ call set_sev_encryption_mask
call load_stage2_idt
call initialize_identity_maps
popq %rsi
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 83385a551f01..6ee089fdc65a 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -107,9 +107,6 @@ static void add_identity_map(unsigned long start, unsigned
long end)
/* Locates and clears a region for a new top level page table. */
void initialize_identity_maps(void)
{
- /* If running as an SEV guest, the encryption mask is required. */
- set_sev_encryption_mask();
-
/* Exclude the encryption mask from __PHYSICAL_MASK */
physical_mask &= ~sme_me_mask;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 21/75] x86/boot/compressed/64: Check return value of kernel_ident_mapping_init()
From: Joerg Roedel <jroedel at suse.de>
The function can fail to create an identity mapping, check for that
and bail out if it happens.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 6ee089fdc65a..5d8b0bffe421 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -93,6 +93,8 @@ static struct x86_mapping_info mapping_info;
*/
static void add_identity_map(unsigned long start, unsigned long end)
{
+ int ret;
+
/* Align boundary to 2M. */
start = round_down(start, PMD_SIZE);
end = round_up(end, PMD_SIZE);
@@ -100,8 +102,9 @@ static void add_identity_map(unsigned long start, unsigned
long end)
return;
/* Build the mapping. */
- kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt,
- start, end);
+ ret = kernel_ident_mapping_init(&mapping_info, (pgd_t *)top_level_pgt,
start, end);
+ if (ret)
+ error("Error: kernel_ident_mapping_init() failed\n");
}
/* Locates and clears a region for a new top level page table. */
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 22/75] x86/boot/compressed/64: Add set_page_en/decrypted() helpers
From: Joerg Roedel <jroedel at suse.de>
The functions are needed to map the GHCB for SEV-ES guests. The GHCB is
used for communication with the hypervisor, so its content must not be
encrypted. After the GHCB is not needed anymore it must be mapped
encrypted again so that the running kernel image can safely re-use the
memory.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 134 ++++++++++++++++++++++++
arch/x86/boot/compressed/misc.h | 2 +
2 files changed, 136 insertions(+)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index 5d8b0bffe421..bb68e9c9d87a 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -26,6 +26,7 @@
#include <asm/init.h>
#include <asm/pgtable.h>
#include <asm/trap_defs.h>
+#include <asm/cmpxchg.h>
/* Use the static base for this part of the boot process */
#undef __PAGE_OFFSET
#define __PAGE_OFFSET __PAGE_OFFSET_BASE
@@ -157,6 +158,139 @@ void initialize_identity_maps(void)
write_cr3(top_level_pgt);
}
+static pte_t *split_large_pmd(struct x86_mapping_info *info,
+ pmd_t *pmdp, unsigned long __address)
+{
+ unsigned long page_flags;
+ unsigned long address;
+ pte_t *pte;
+ pmd_t pmd;
+ int i;
+
+ pte = (pte_t *)info->alloc_pgt_page(info->context);
+ if (!pte)
+ return NULL;
+
+ address = __address & PMD_MASK;
+ /* No large page - clear PSE flag */
+ page_flags = info->page_flag & ~_PAGE_PSE;
+
+ /* Populate the PTEs */
+ for (i = 0; i < PTRS_PER_PMD; i++) {
+ set_pte(&pte[i], __pte(address | page_flags));
+ address += PAGE_SIZE;
+ }
+
+ /*
+ * Ideally we need to clear the large PMD first and do a TLB
+ * flush before we write the new PMD. But the 2M range of the
+ * PMD might contain the code we execute and/or the stack
+ * we are on, so we can't do that. But that should be safe here
+ * because we are going from large to small mappings and we are
+ * also the only user of the page-table, so there is no chance
+ * of a TLB multihit.
+ */
+ pmd = __pmd((unsigned long)pte | info->kernpg_flag);
+ set_pmd(pmdp, pmd);
+ /* Flush TLB to establish the new PMD */
+ write_cr3(top_level_pgt);
+
+ return pte + pte_index(__address);
+}
+
+static void clflush_page(unsigned long address)
+{
+ unsigned int flush_size;
+ char *cl, *start, *end;
+
+ /*
+ * Hardcode cl-size to 64 - CPUID can't be used here because that might
+ * cause another #VC exception and the GHCB is not ready to use yet.
+ */
+ flush_size = 64;
+ start = (char *)(address & PAGE_MASK);
+ end = start + PAGE_SIZE;
+
+ /*
+ * First make sure there are no pending writes on the cache-lines to
+ * flush.
+ */
+ asm volatile("mfence" : : : "memory");
+
+ for (cl = start; cl != end; cl += flush_size)
+ clflush(cl);
+}
+
+static int set_clr_page_flags(struct x86_mapping_info *info,
+ unsigned long address,
+ pteval_t set, pteval_t clr)
+{
+ unsigned long scratch, *target;
+ pgd_t *pgdp = (pgd_t *)top_level_pgt;
+ p4d_t *p4dp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep, pte;
+
+ /*
+ * First make sure there is a PMD mapping for 'address'.
+ * It should already exist, but keep things generic.
+ *
+ * To map the page just read from it and fault it in if there is no
+ * mapping yet. add_identity_map() can't be called here because that
+ * would unconditionally map the address on PMD level, destroying any
+ * PTE-level mappings that might already exist. Also do something
+ * useless with 'scratch' so the access won't be optimized away.
+ */
+ target = (unsigned long *)address;
+ scratch = *target;
+ arch_cmpxchg(target, scratch, scratch);
+
+ /*
+ * The page is mapped at least with PMD size - so skip checks and walk
+ * directly to the PMD.
+ */
+ p4dp = p4d_offset(pgdp, address);
+ pudp = pud_offset(p4dp, address);
+ pmdp = pmd_offset(pudp, address);
+
+ if (pmd_large(*pmdp))
+ ptep = split_large_pmd(info, pmdp, address);
+ else
+ ptep = pte_offset_kernel(pmdp, address);
+
+ if (!ptep)
+ return -ENOMEM;
+
+ /*
+ * Changing encryption attributes of a page requires to flush it from
+ * the caches.
+ */
+ if ((set | clr) & _PAGE_ENC)
+ clflush_page(address);
+
+ /* Update PTE */
+ pte = *ptep;
+ pte = pte_set_flags(pte, set);
+ pte = pte_clear_flags(pte, clr);
+ set_pte(ptep, pte);
+
+ /* Flush TLB after changing encryption attribute */
+ write_cr3(top_level_pgt);
+
+ return 0;
+}
+
+int set_page_decrypted(unsigned long address)
+{
+ return set_clr_page_flags(&mapping_info, address, 0, _PAGE_ENC);
+}
+
+int set_page_encrypted(unsigned long address)
+{
+ return set_clr_page_flags(&mapping_info, address, _PAGE_ENC, 0);
+}
+
void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
{
unsigned long address = native_read_cr2() & PMD_MASK;
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 65da40777bc1..5e569e8a7d75 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -98,6 +98,8 @@ static inline void choose_random_location(unsigned long input,
#endif
#ifdef CONFIG_X86_64
+extern int set_page_decrypted(unsigned long address);
+extern int set_page_encrypted(unsigned long address);
extern unsigned char _pgtable[];
#endif
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 23/75] x86/boot/compressed/64: Setup GHCB Based VC Exception handler
From: Joerg Roedel <jroedel at suse.de>
Install an exception handler for #VC exception that uses a GHCB. Also
add the infrastructure for handling different exit-codes by decoding
the instruction that caused the exception and error handling.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/Kconfig | 1 +
arch/x86/boot/compressed/Makefile | 3 +
arch/x86/boot/compressed/idt_64.c | 4 +
arch/x86/boot/compressed/idt_handlers_64.S | 3 +-
arch/x86/boot/compressed/misc.c | 7 +
arch/x86/boot/compressed/misc.h | 7 +
arch/x86/boot/compressed/sev-es.c | 110 +++++++++++++++
arch/x86/include/asm/sev-es.h | 39 ++++++
arch/x86/include/uapi/asm/svm.h | 1 +
arch/x86/kernel/sev-es-shared.c | 154 +++++++++++++++++++++
10 files changed, 328 insertions(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1197b5596d5a..2ba5f74f186d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1523,6 +1523,7 @@ config AMD_MEM_ENCRYPT
select DYNAMIC_PHYSICAL_MASK
select ARCH_USE_MEMREMAP_PROT
select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select INSTRUCTION_DECODER
---help---
Say yes to enable support for the encryption of system memory.
This requires an AMD processor that supports Secure Memory
diff --git a/arch/x86/boot/compressed/Makefile
b/arch/x86/boot/compressed/Makefile
index a7847a1ef63a..8372b85c9c0e 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -41,6 +41,9 @@ KBUILD_CFLAGS += -Wno-pointer-sign
KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+# sev-es.c inludes generated $(objtree)/arch/x86/lib/inat-tables.c
+CFLAGS_sev-es.o += -I$(objtree)/arch/x86/lib/
+
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
GCOV_PROFILE := n
UBSAN_SANITIZE :=n
diff --git a/arch/x86/boot/compressed/idt_64.c
b/arch/x86/boot/compressed/idt_64.c
index f8295d68b3e1..44d20c4f47c9 100644
--- a/arch/x86/boot/compressed/idt_64.c
+++ b/arch/x86/boot/compressed/idt_64.c
@@ -45,5 +45,9 @@ void load_stage2_idt(void)
set_idt_entry(X86_TRAP_PF, boot_page_fault);
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ set_idt_entry(X86_TRAP_VC, boot_stage2_vc);
+#endif
+
load_boot_idt(&boot_idt_desc);
}
diff --git a/arch/x86/boot/compressed/idt_handlers_64.S
b/arch/x86/boot/compressed/idt_handlers_64.S
index 8473bf88e64e..bd058aa21e4f 100644
--- a/arch/x86/boot/compressed/idt_handlers_64.S
+++ b/arch/x86/boot/compressed/idt_handlers_64.S
@@ -71,5 +71,6 @@ SYM_FUNC_END(\name)
EXCEPTION_HANDLER boot_page_fault do_boot_page_fault error_code=1
#ifdef CONFIG_AMD_MEM_ENCRYPT
-EXCEPTION_HANDLER boot_stage1_vc do_vc_no_ghcb error_code=1
+EXCEPTION_HANDLER boot_stage1_vc do_vc_no_ghcb error_code=1
+EXCEPTION_HANDLER boot_stage2_vc do_boot_stage2_vc error_code=1
#endif
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 9652d5c2afda..dba49e75095a 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -441,6 +441,13 @@ asmlinkage __visible void *extract_kernel(void *rmode,
memptr heap,
parse_elf(output);
handle_relocations(output, output_len, virt_addr);
debug_putstr("done.\nBooting the kernel.\n");
+
+ /*
+ * Flush GHCB from cache and map it encrypted again when running as
+ * SEV-ES guest.
+ */
+ sev_es_shutdown_ghcb();
+
return output;
}
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 5e569e8a7d75..4d37a28370ed 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -115,6 +115,12 @@ static inline void console_init(void)
void set_sev_encryption_mask(void);
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+void sev_es_shutdown_ghcb(void);
+#else
+static inline void sev_es_shutdown_ghcb(void) { }
+#endif
+
/* acpi.c */
#ifdef CONFIG_ACPI
acpi_physical_address get_rsdp_addr(void);
@@ -144,5 +150,6 @@ extern struct desc_ptr boot_idt_desc;
/* IDT Entry Points */
void boot_page_fault(void);
void boot_stage1_vc(void);
+void boot_stage2_vc(void);
#endif /* BOOT_COMPRESSED_MISC_H */
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index bb91cbb5920e..940d72571fc9 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -13,10 +13,16 @@
#include "misc.h"
#include <asm/sev-es.h>
+#include <asm/trap_defs.h>
#include <asm/msr-index.h>
#include <asm/ptrace.h>
#include <asm/svm.h>
+#include "error.h"
+
+struct ghcb boot_ghcb_page __aligned(PAGE_SIZE);
+struct ghcb *boot_ghcb;
+
static inline u64 sev_es_rd_ghcb_msr(void)
{
unsigned long low, high;
@@ -38,8 +44,112 @@ static inline void sev_es_wr_ghcb_msr(u64 val)
"a"(low), "d" (high) : "memory");
}
+static enum es_result vc_decode_insn(struct es_em_ctxt *ctxt)
+{
+ char buffer[MAX_INSN_SIZE];
+ enum es_result ret;
+
+ memcpy(buffer, (unsigned char *)ctxt->regs->ip, MAX_INSN_SIZE);
+
+ insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE, 1);
+ insn_get_length(&ctxt->insn);
+
+ ret = ctxt->insn.immediate.got ? ES_OK : ES_DECODE_FAILED;
+
+ return ret;
+}
+
+static enum es_result vc_write_mem(struct es_em_ctxt *ctxt,
+ void *dst, char *buf, size_t size)
+{
+ memcpy(dst, buf, size);
+
+ return ES_OK;
+}
+
+static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
+ void *src, char *buf, size_t size)
+{
+ memcpy(buf, src, size);
+
+ return ES_OK;
+}
+
#undef __init
+#undef __pa
#define __init
+#define __pa(x) ((unsigned long)(x))
+
+#define __BOOT_COMPRESSED
+
+/* Basic instruction decoding support needed */
+#include "../../lib/inat.c"
+#include "../../lib/insn.c"
/* Include code for early handlers */
#include "../../kernel/sev-es-shared.c"
+
+static bool sev_es_setup_ghcb(void)
+{
+ if (!sev_es_negotiate_protocol())
+ sev_es_terminate(GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED);
+
+ if (set_page_decrypted((unsigned long)&boot_ghcb_page))
+ return false;
+
+ /* Page is now mapped decrypted, clear it */
+ memset(&boot_ghcb_page, 0, sizeof(boot_ghcb_page));
+
+ boot_ghcb = &boot_ghcb_page;
+
+ /* Initialize lookup tables for the instruction decoder */
+ inat_init_tables();
+
+ return true;
+}
+
+void sev_es_shutdown_ghcb(void)
+{
+ if (!boot_ghcb)
+ return;
+
+ /*
+ * GHCB Page must be flushed from the cache and mapped encrypted again.
+ * Otherwise the running kernel will see strange cache effects when
+ * trying to use that page.
+ */
+ if (set_page_encrypted((unsigned long)&boot_ghcb_page))
+ error("Can't map GHCB page encrypted");
+}
+
+void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
+{
+ struct es_em_ctxt ctxt;
+ enum es_result result;
+
+ if (!boot_ghcb && !sev_es_setup_ghcb())
+ sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
+
+ vc_ghcb_invalidate(boot_ghcb);
+ result = vc_init_em_ctxt(&ctxt, regs, exit_code);
+ if (result != ES_OK)
+ goto finish;
+
+ switch (exit_code) {
+ default:
+ result = ES_UNSUPPORTED;
+ break;
+ }
+
+finish:
+ if (result == ES_OK) {
+ vc_finish_insn(&ctxt);
+ } else if (result != ES_RETRY) {
+ /*
+ * For now, just halt the machine. That makes debugging easier,
+ * later we just call sev_es_terminate() here.
+ */
+ while (true)
+ asm volatile("hlt\n");
+ }
+}
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index 5d49a8a429d3..7c0807b84546 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -9,7 +9,14 @@
#define __ASM_ENCRYPTED_STATE_H
#include <linux/types.h>
+#include <asm/insn.h>
+#define GHCB_SEV_INFO 0x001UL
+#define GHCB_SEV_INFO_REQ 0x002UL
+#define GHCB_INFO(v) ((v) & 0xfffUL)
+#define GHCB_PROTO_MAX(v) (((v) >> 48) & 0xffffUL)
+#define GHCB_PROTO_MIN(v) (((v) >> 32) & 0xffffUL)
+#define GHCB_PROTO_OUR 0x0001UL
#define GHCB_SEV_CPUID_REQ 0x004UL
#define GHCB_CPUID_REQ_EAX 0
#define GHCB_CPUID_REQ_EBX 1
@@ -19,12 +26,44 @@
(((unsigned long)reg & 3) << 30) | \
(((unsigned long)fn) << 32))
+#define GHCB_PROTOCOL_MAX 0x0001UL
+#define GHCB_DEFAULT_USAGE 0x0000UL
+
#define GHCB_SEV_CPUID_RESP 0x005UL
#define GHCB_SEV_TERMINATE 0x100UL
+#define GHCB_SEV_TERMINATE_REASON(reason_set, reason_val) \
+ (((((u64)reason_set) & 0x7) << 12) | \
+ ((((u64)reason_val) & 0xff) << 16))
+#define GHCB_SEV_ES_REASON_GENERAL_REQUEST 0
+#define GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED 1
#define GHCB_SEV_GHCB_RESP_CODE(v) ((v) & 0xfff)
#define VMGEXIT() { asm volatile("rep; vmmcall\n\r"); }
+enum es_result {
+ ES_OK, /* All good */
+ ES_UNSUPPORTED, /* Requested operation not supported */
+ ES_VMM_ERROR, /* Unexpected state from the VMM */
+ ES_DECODE_FAILED, /* Instruction decoding failed */
+ ES_EXCEPTION, /* Instruction caused exception */
+ ES_RETRY, /* Retry instruction emulation */
+};
+
+struct es_fault_info {
+ unsigned long vector;
+ unsigned long error_code;
+ unsigned long cr2;
+};
+
+struct pt_regs;
+
+/* ES instruction emulation context */
+struct es_em_ctxt {
+ struct pt_regs *regs;
+ struct insn insn;
+ struct es_fault_info fi;
+};
+
void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code);
static inline u64 lower_bits(u64 val, unsigned int bits)
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
index 2e8a30f06c74..c68d1618c9b0 100644
--- a/arch/x86/include/uapi/asm/svm.h
+++ b/arch/x86/include/uapi/asm/svm.h
@@ -29,6 +29,7 @@
#define SVM_EXIT_WRITE_DR6 0x036
#define SVM_EXIT_WRITE_DR7 0x037
#define SVM_EXIT_EXCP_BASE 0x040
+#define SVM_EXIT_LAST_EXCP 0x05f
#define SVM_EXIT_INTR 0x060
#define SVM_EXIT_NMI 0x061
#define SVM_EXIT_SMI 0x062
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 5927152487ad..22eb3ed89186 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -9,6 +9,118 @@
* and is included directly into both code-bases.
*/
+static void sev_es_terminate(unsigned int reason)
+{
+ u64 val = GHCB_SEV_TERMINATE;
+
+ /*
+ * Tell the hypervisor what went wrong - only reason-set 0 is
+ * currently supported.
+ */
+ val |= GHCB_SEV_TERMINATE_REASON(0, reason);
+
+ /* Request Guest Termination from Hypvervisor */
+ sev_es_wr_ghcb_msr(val);
+ VMGEXIT();
+
+ while (true)
+ asm volatile("hlt\n" : : : "memory");
+}
+
+static bool sev_es_negotiate_protocol(void)
+{
+ u64 val;
+
+ /* Do the GHCB protocol version negotiation */
+ sev_es_wr_ghcb_msr(GHCB_SEV_INFO_REQ);
+ VMGEXIT();
+ val = sev_es_rd_ghcb_msr();
+
+ if (GHCB_INFO(val) != GHCB_SEV_INFO)
+ return false;
+
+ if (GHCB_PROTO_MAX(val) < GHCB_PROTO_OUR ||
+ GHCB_PROTO_MIN(val) > GHCB_PROTO_OUR)
+ return false;
+
+ return true;
+}
+
+static void vc_ghcb_invalidate(struct ghcb *ghcb)
+{
+ memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
+}
+
+static bool vc_decoding_needed(unsigned long exit_code)
+{
+ /* Exceptions don't require to decode the instruction */
+ return !(exit_code >= SVM_EXIT_EXCP_BASE &&
+ exit_code <= SVM_EXIT_LAST_EXCP);
+}
+
+static enum es_result vc_init_em_ctxt(struct es_em_ctxt *ctxt,
+ struct pt_regs *regs,
+ unsigned long exit_code)
+{
+ enum es_result ret = ES_OK;
+
+ memset(ctxt, 0, sizeof(*ctxt));
+ ctxt->regs = regs;
+
+ if (vc_decoding_needed(exit_code))
+ ret = vc_decode_insn(ctxt);
+
+ return ret;
+}
+
+static void vc_finish_insn(struct es_em_ctxt *ctxt)
+{
+ ctxt->regs->ip += ctxt->insn.length;
+}
+
+static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ u64 exit_code, u64 exit_info_1,
+ u64 exit_info_2)
+{
+ enum es_result ret;
+
+ /* Fill in protocol and format specifiers */
+ ghcb->protocol_version = GHCB_PROTOCOL_MAX;
+ ghcb->ghcb_usage = GHCB_DEFAULT_USAGE;
+
+ ghcb_set_sw_exit_code(ghcb, exit_code);
+ ghcb_set_sw_exit_info_1(ghcb, exit_info_1);
+ ghcb_set_sw_exit_info_2(ghcb, exit_info_2);
+
+ sev_es_wr_ghcb_msr(__pa(ghcb));
+ VMGEXIT();
+
+ if ((ghcb->save.sw_exit_info_1 & 0xffffffff) == 1) {
+ u64 info = ghcb->save.sw_exit_info_2;
+ unsigned long v;
+
+ info = ghcb->save.sw_exit_info_2;
+ v = info & SVM_EVTINJ_VEC_MASK;
+
+ /* Check if exception information from hypervisor is sane. */
+ if ((info & SVM_EVTINJ_VALID) &&
+ ((v == X86_TRAP_GP) || (v == X86_TRAP_UD)) &&
+ ((info & SVM_EVTINJ_TYPE_MASK) == SVM_EVTINJ_TYPE_EXEPT)) {
+ ctxt->fi.vector = v;
+ if (info & SVM_EVTINJ_VALID_ERR)
+ ctxt->fi.error_code = info >> 32;
+ ret = ES_EXCEPTION;
+ } else {
+ ret = ES_VMM_ERROR;
+ }
+ } else {
+ ret = ES_OK;
+ }
+
+ return ret;
+}
+
/*
* Boot VC Handler - This is the first VC handler during boot, there is no GHCB
* page yet, so it only supports the MSR based communication with the
@@ -63,3 +175,45 @@ void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned
long exit_code)
while (true)
asm volatile("hlt\n");
}
+
+static enum es_result vc_insn_string_read(struct es_em_ctxt *ctxt,
+ void *src, char *buf,
+ unsigned int data_size,
+ unsigned int count,
+ bool backwards)
+{
+ int i, b = backwards ? -1 : 1;
+ enum es_result ret = ES_OK;
+
+ for (i = 0; i < count; i++) {
+ void *s = src + (i * data_size * b);
+ char *d = buf + (i * data_size);
+
+ ret = vc_read_mem(ctxt, s, d, data_size);
+ if (ret != ES_OK)
+ break;
+ }
+
+ return ret;
+}
+
+static enum es_result vc_insn_string_write(struct es_em_ctxt *ctxt,
+ void *dst, char *buf,
+ unsigned int data_size,
+ unsigned int count,
+ bool backwards)
+{
+ int i, s = backwards ? -1 : 1;
+ enum es_result ret = ES_OK;
+
+ for (i = 0; i < count; i++) {
+ void *d = dst + (i * data_size * s);
+ char *b = buf + (i * data_size);
+
+ ret = vc_write_mem(ctxt, d, b, data_size);
+ if (ret != ES_OK)
+ break;
+ }
+
+ return ret;
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 24/75] x86/boot/compressed/64: Unmap GHCB page before booting the kernel
From: Joerg Roedel <jroedel at suse.de>
Force a page-fault on any further accesses to the GHCB page when they
shouldn't happen anymore. This will catch the bugs where a #VC exception
is raised when no one is expected anymore.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/ident_map_64.c | 23 +++++++++++++++++++----
arch/x86/boot/compressed/misc.h | 6 ++++++
arch/x86/boot/compressed/sev-es.c | 14 ++++++++++++++
3 files changed, 39 insertions(+), 4 deletions(-)
diff --git a/arch/x86/boot/compressed/ident_map_64.c
b/arch/x86/boot/compressed/ident_map_64.c
index bb68e9c9d87a..d3771d455249 100644
--- a/arch/x86/boot/compressed/ident_map_64.c
+++ b/arch/x86/boot/compressed/ident_map_64.c
@@ -291,10 +291,21 @@ int set_page_encrypted(unsigned long address)
return set_clr_page_flags(&mapping_info, address, _PAGE_ENC, 0);
}
+int set_page_non_present(unsigned long address)
+{
+ return set_clr_page_flags(&mapping_info, address, 0, _PAGE_PRESENT);
+}
+
void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code)
{
- unsigned long address = native_read_cr2() & PMD_MASK;
- unsigned long end = address + PMD_SIZE;
+ unsigned long address = native_read_cr2();
+ unsigned long end;
+ bool ghcb_fault;
+
+ ghcb_fault = sev_es_check_ghcb_fault(address);
+
+ address &= PMD_MASK;
+ end = address + PMD_SIZE;
/*
* Check for unexpected error codes. Unexpected are:
@@ -302,9 +313,13 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long
error_code)
* - User faults
* - Reserved bits set
*/
- if (error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) {
+ if (ghcb_fault ||
+ error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) {
/* Print some information for debugging */
- error_putstr("Unexpected page-fault:");
+ if (ghcb_fault)
+ error_putstr("Page-fault on GHCB page:");
+ else
+ error_putstr("Unexpected page-fault:");
error_putstr("\nError Code: ");
error_puthex(error_code);
error_putstr("\nCR2: 0x");
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 4d37a28370ed..2e5f82acc122 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -100,6 +100,7 @@ static inline void choose_random_location(unsigned long
input,
#ifdef CONFIG_X86_64
extern int set_page_decrypted(unsigned long address);
extern int set_page_encrypted(unsigned long address);
+extern int set_page_non_present(unsigned long address);
extern unsigned char _pgtable[];
#endif
@@ -117,8 +118,13 @@ void set_sev_encryption_mask(void);
#ifdef CONFIG_AMD_MEM_ENCRYPT
void sev_es_shutdown_ghcb(void);
+extern bool sev_es_check_ghcb_fault(unsigned long address);
#else
static inline void sev_es_shutdown_ghcb(void) { }
+static inline bool sev_es_check_ghcb_fault(unsigned long address)
+{
+ return false;
+}
#endif
/* acpi.c */
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index 940d72571fc9..1241697dd156 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -120,6 +120,20 @@ void sev_es_shutdown_ghcb(void)
*/
if (set_page_encrypted((unsigned long)&boot_ghcb_page))
error("Can't map GHCB page encrypted");
+
+ /*
+ * GHCB page is mapped encrypted again and flushed from the cache.
+ * Mark it non-present now to catch bugs when #VC exceptions trigger
+ * after this point.
+ */
+ if (set_page_non_present((unsigned long)&boot_ghcb_page))
+ error("Can't unmap GHCB page");
+}
+
+bool sev_es_check_ghcb_fault(unsigned long address)
+{
+ /* Check whether the fault was on the GHCB page */
+ return ((address & PAGE_MASK) == (unsigned long)&boot_ghcb_page);
}
void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 25/75] x86/sev-es: Add support for handling IOIO exceptions
From: Tom Lendacky <thomas.lendacky at amd.com>
Add support for decoding and handling #VC exceptions for IOIO events.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapted code to #VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/sev-es.c | 32 +++++
arch/x86/kernel/sev-es-shared.c | 202 ++++++++++++++++++++++++++++++
2 files changed, 234 insertions(+)
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index 1241697dd156..17765e471e28 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -23,6 +23,35 @@
struct ghcb boot_ghcb_page __aligned(PAGE_SIZE);
struct ghcb *boot_ghcb;
+/*
+ * Copy a version of this function here - insn-eval.c can't be used in
+ * pre-decompression code.
+ */
+static bool insn_has_rep_prefix(struct insn *insn)
+{
+ int i;
+
+ insn_get_prefixes(insn);
+
+ for (i = 0; i < insn->prefixes.nbytes; i++) {
+ insn_byte_t p = insn->prefixes.bytes[i];
+
+ if (p == 0xf2 || p == 0xf3)
+ return true;
+ }
+
+ return false;
+}
+
+/*
+ * Only a dummy for insn_get_seg_base() - Early boot-code is 64bit only and
+ * doesn't use segments.
+ */
+static unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx)
+{
+ return 0UL;
+}
+
static inline u64 sev_es_rd_ghcb_msr(void)
{
unsigned long low, high;
@@ -150,6 +179,9 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long
exit_code)
goto finish;
switch (exit_code) {
+ case SVM_EXIT_IOIO:
+ result = vc_handle_ioio(boot_ghcb, &ctxt);
+ break;
default:
result = ES_UNSUPPORTED;
break;
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 22eb3ed89186..5d4d0e2b7777 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -217,3 +217,205 @@ static enum es_result vc_insn_string_write(struct
es_em_ctxt *ctxt,
return ret;
}
+
+#define IOIO_TYPE_STR BIT(2)
+#define IOIO_TYPE_IN 1
+#define IOIO_TYPE_INS (IOIO_TYPE_IN | IOIO_TYPE_STR)
+#define IOIO_TYPE_OUT 0
+#define IOIO_TYPE_OUTS (IOIO_TYPE_OUT | IOIO_TYPE_STR)
+
+#define IOIO_REP BIT(3)
+
+#define IOIO_ADDR_64 BIT(9)
+#define IOIO_ADDR_32 BIT(8)
+#define IOIO_ADDR_16 BIT(7)
+
+#define IOIO_DATA_32 BIT(6)
+#define IOIO_DATA_16 BIT(5)
+#define IOIO_DATA_8 BIT(4)
+
+#define IOIO_SEG_ES (0 << 10)
+#define IOIO_SEG_DS (3 << 10)
+
+static enum es_result vc_ioio_exitinfo(struct es_em_ctxt *ctxt, u64 *exitinfo)
+{
+ struct insn *insn = &ctxt->insn;
+ *exitinfo = 0;
+
+ switch (insn->opcode.bytes[0]) {
+ /* INS opcodes */
+ case 0x6c:
+ case 0x6d:
+ *exitinfo |= IOIO_TYPE_INS;
+ *exitinfo |= IOIO_SEG_ES;
+ *exitinfo |= (ctxt->regs->dx & 0xffff) << 16;
+ break;
+
+ /* OUTS opcodes */
+ case 0x6e:
+ case 0x6f:
+ *exitinfo |= IOIO_TYPE_OUTS;
+ *exitinfo |= IOIO_SEG_DS;
+ *exitinfo |= (ctxt->regs->dx & 0xffff) << 16;
+ break;
+
+ /* IN immediate opcodes */
+ case 0xe4:
+ case 0xe5:
+ *exitinfo |= IOIO_TYPE_IN;
+ *exitinfo |= insn->immediate.value << 16;
+ break;
+
+ /* OUT immediate opcodes */
+ case 0xe6:
+ case 0xe7:
+ *exitinfo |= IOIO_TYPE_OUT;
+ *exitinfo |= insn->immediate.value << 16;
+ break;
+
+ /* IN register opcodes */
+ case 0xec:
+ case 0xed:
+ *exitinfo |= IOIO_TYPE_IN;
+ *exitinfo |= (ctxt->regs->dx & 0xffff) << 16;
+ break;
+
+ /* OUT register opcodes */
+ case 0xee:
+ case 0xef:
+ *exitinfo |= IOIO_TYPE_OUT;
+ *exitinfo |= (ctxt->regs->dx & 0xffff) << 16;
+ break;
+
+ default:
+ return ES_DECODE_FAILED;
+ }
+
+ switch (insn->opcode.bytes[0]) {
+ case 0x6c:
+ case 0x6e:
+ case 0xe4:
+ case 0xe6:
+ case 0xec:
+ case 0xee:
+ /* Single byte opcodes */
+ *exitinfo |= IOIO_DATA_8;
+ break;
+ default:
+ /* Length determined by instruction parsing */
+ *exitinfo |= (insn->opnd_bytes == 2) ? IOIO_DATA_16
+ : IOIO_DATA_32;
+ }
+ switch (insn->addr_bytes) {
+ case 2:
+ *exitinfo |= IOIO_ADDR_16;
+ break;
+ case 4:
+ *exitinfo |= IOIO_ADDR_32;
+ break;
+ case 8:
+ *exitinfo |= IOIO_ADDR_64;
+ break;
+ }
+
+ if (insn_has_rep_prefix(insn))
+ *exitinfo |= IOIO_REP;
+
+ return ES_OK;
+}
+
+static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt
*ctxt)
+{
+ struct pt_regs *regs = ctxt->regs;
+ u64 exit_info_1, exit_info_2;
+ enum es_result ret;
+
+ ret = vc_ioio_exitinfo(ctxt, &exit_info_1);
+ if (ret != ES_OK)
+ return ret;
+
+ if (exit_info_1 & IOIO_TYPE_STR) {
+ int df = (regs->flags & X86_EFLAGS_DF) ? -1 : 1;
+ unsigned int io_bytes, exit_bytes;
+ unsigned int ghcb_count, op_count;
+ unsigned long es_base;
+ u64 sw_scratch;
+
+ /*
+ * For the string variants with rep prefix the amount of in/out
+ * operations per #VC exception is limited so that the kernel
+ * has a chance to take interrupts an re-schedule while the
+ * instruction is emulated.
+ */
+ io_bytes = (exit_info_1 >> 4) & 0x7;
+ ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes;
+
+ op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1;
+ exit_info_2 = min(op_count, ghcb_count);
+ exit_bytes = exit_info_2 * io_bytes;
+
+ es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES);
+
+ if (!(exit_info_1 & IOIO_TYPE_IN)) {
+ ret = vc_insn_string_read(ctxt,
+ (void *)(es_base + regs->si),
+ ghcb->shared_buffer, io_bytes,
+ exit_info_2, df);
+ if (ret)
+ return ret;
+ }
+
+ sw_scratch = __pa(ghcb) + offsetof(struct ghcb, shared_buffer);
+ ghcb_set_sw_scratch(ghcb, sw_scratch);
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO,
+ exit_info_1, exit_info_2);
+ if (ret != ES_OK)
+ return ret;
+
+ /* Everything went well, write back results */
+ if (exit_info_1 & IOIO_TYPE_IN) {
+ ret = vc_insn_string_write(ctxt,
+ (void *)(es_base + regs->di),
+ ghcb->shared_buffer, io_bytes,
+ exit_info_2, df);
+ if (ret)
+ return ret;
+
+ if (df)
+ regs->di -= exit_bytes;
+ else
+ regs->di += exit_bytes;
+ } else {
+ if (df)
+ regs->si -= exit_bytes;
+ else
+ regs->si += exit_bytes;
+ }
+
+ if (exit_info_1 & IOIO_REP)
+ regs->cx -= exit_info_2;
+
+ ret = regs->cx ? ES_RETRY : ES_OK;
+
+ } else {
+ int bits = (exit_info_1 & 0x70) >> 1;
+ u64 rax = 0;
+
+ if (!(exit_info_1 & IOIO_TYPE_IN))
+ rax = lower_bits(regs->ax, bits);
+
+ ghcb_set_rax(ghcb, rax);
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO, exit_info_1, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (exit_info_1 & IOIO_TYPE_IN) {
+ if (!ghcb_is_valid_rax(ghcb))
+ return ES_VMM_ERROR;
+ regs->ax = lower_bits(ghcb->save.rax, bits);
+ }
+ }
+
+ return ret;
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 26/75] x86/fpu: Move xgetbv()/xsetbv() into separate header
From: Joerg Roedel <jroedel at suse.de>
The xgetbv() function is needed in pre-decompression boot code, but
asm/fpu/internal.h can't be included there directly. Doing so opens
the door to include-hell due to various include-magic in
boot/compressed/misc.h.
Avoid that by moving xgetbv()/xsetbv() to a separate header file and
include this instead.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/fpu/internal.h | 29 +-------------------------
arch/x86/include/asm/fpu/xcr.h | 32 +++++++++++++++++++++++++++++
2 files changed, 33 insertions(+), 28 deletions(-)
create mode 100644 arch/x86/include/asm/fpu/xcr.h
diff --git a/arch/x86/include/asm/fpu/internal.h
b/arch/x86/include/asm/fpu/internal.h
index 44c48e34d799..795fc049988e 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -19,6 +19,7 @@
#include <asm/user.h>
#include <asm/fpu/api.h>
#include <asm/fpu/xstate.h>
+#include <asm/fpu/xcr.h>
#include <asm/cpufeature.h>
#include <asm/trace/fpu.h>
@@ -614,32 +615,4 @@ static inline void switch_fpu_finish(struct fpu *new_fpu)
}
__write_pkru(pkru_val);
}
-
-/*
- * MXCSR and XCR definitions:
- */
-
-extern unsigned int mxcsr_feature_mask;
-
-#define XCR_XFEATURE_ENABLED_MASK 0x00000000
-
-static inline u64 xgetbv(u32 index)
-{
- u32 eax, edx;
-
- asm volatile(".byte 0x0f,0x01,0xd0" /* xgetbv */
- : "=a" (eax), "=d" (edx)
- : "c" (index));
- return eax + ((u64)edx << 32);
-}
-
-static inline void xsetbv(u32 index, u64 value)
-{
- u32 eax = value;
- u32 edx = value >> 32;
-
- asm volatile(".byte 0x0f,0x01,0xd1" /* xsetbv */
- : : "a" (eax), "d" (edx), "c" (index));
-}
-
#endif /* _ASM_X86_FPU_INTERNAL_H */
diff --git a/arch/x86/include/asm/fpu/xcr.h b/arch/x86/include/asm/fpu/xcr.h
new file mode 100644
index 000000000000..91ee45712737
--- /dev/null
+++ b/arch/x86/include/asm/fpu/xcr.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_FPU_XCR_H
+#define _ASM_X86_FPU_XCR_H
+
+/*
+ * MXCSR and XCR definitions:
+ */
+
+extern unsigned int mxcsr_feature_mask;
+
+#define XCR_XFEATURE_ENABLED_MASK 0x00000000
+
+static inline u64 xgetbv(u32 index)
+{
+ u32 eax, edx;
+
+ asm volatile(".byte 0x0f,0x01,0xd0" /* xgetbv */
+ : "=a" (eax), "=d" (edx)
+ : "c" (index));
+ return eax + ((u64)edx << 32);
+}
+
+static inline void xsetbv(u32 index, u64 value)
+{
+ u32 eax = value;
+ u32 edx = value >> 32;
+
+ asm volatile(".byte 0x0f,0x01,0xd1" /* xsetbv */
+ : : "a" (eax), "d" (edx), "c" (index));
+}
+
+#endif /* _ASM_X86_FPU_XCR_H */
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 27/75] x86/sev-es: Add CPUID handling to #VC handler
From: Tom Lendacky <thomas.lendacky at amd.com>
Handle #VC exceptions caused by CPUID instructions. These happen in
early boot code when the KASLR code checks for RDTSC.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/sev-es.c | 4 ++++
arch/x86/kernel/sev-es-shared.c | 35 +++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index 17765e471e28..05ba1dcdd103 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -15,6 +15,7 @@
#include <asm/sev-es.h>
#include <asm/trap_defs.h>
#include <asm/msr-index.h>
+#include <asm/fpu/xcr.h>
#include <asm/ptrace.h>
#include <asm/svm.h>
@@ -182,6 +183,9 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long
exit_code)
case SVM_EXIT_IOIO:
result = vc_handle_ioio(boot_ghcb, &ctxt);
break;
+ case SVM_EXIT_CPUID:
+ result = vc_handle_cpuid(boot_ghcb, &ctxt);
+ break;
default:
result = ES_UNSUPPORTED;
break;
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 5d4d0e2b7777..3d645662ff10 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -419,3 +419,38 @@ static enum es_result vc_handle_ioio(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
return ret;
}
+
+static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ struct pt_regs *regs = ctxt->regs;
+ u32 cr4 = native_read_cr4();
+ enum es_result ret;
+
+ ghcb_set_rax(ghcb, regs->ax);
+ ghcb_set_rcx(ghcb, regs->cx);
+
+ if (cr4 & X86_CR4_OSXSAVE)
+ /* Safe to read xcr0 */
+ ghcb_set_xcr0(ghcb, xgetbv(XCR_XFEATURE_ENABLED_MASK));
+ else
+ /* xgetbv will cause #GP - use reset value for xcr0 */
+ ghcb_set_xcr0(ghcb, 1);
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_CPUID, 0, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (!(ghcb_is_valid_rax(ghcb) &&
+ ghcb_is_valid_rbx(ghcb) &&
+ ghcb_is_valid_rcx(ghcb) &&
+ ghcb_is_valid_rdx(ghcb)))
+ return ES_VMM_ERROR;
+
+ regs->ax = ghcb->save.rax;
+ regs->bx = ghcb->save.rbx;
+ regs->cx = ghcb->save.rcx;
+ regs->dx = ghcb->save.rdx;
+
+ return ES_OK;
+}
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
With SEV-ES, exception handling is needed very early, even before the
kernel has cleared the bss segment. In order to prevent clearing the
currently used IDT, move the IDT to the data segment.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/idt.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 87ef69a72c52..a8fc01ea602a 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -165,8 +165,12 @@ static const __initconst struct idt_data dbg_idts[] = {
};
#endif
-/* Must be page-aligned because the real IDT is used in a fixmap. */
-gate_desc idt_table[IDT_ENTRIES] __page_aligned_bss;
+/*
+ * Must be page-aligned because the real IDT is used in a fixmap.
+ * Also needs to be in the .data segment, because the idt_table is
+ * needed before the kernel clears the .bss segment.
+ */
+gate_desc idt_table[IDT_ENTRIES] __page_aligned_data;
struct desc_ptr idt_descr __ro_after_init = {
.size = (IDT_ENTRIES * 2 * sizeof(unsigned long)) - 1,
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 29/75] x86/idt: Split idt_data setup out of set_intr_gate()
From: Joerg Roedel <jroedel at suse.de>
The code to setup idt_data is needed for early exception handling, but
set_intr_gate() can't be used that early because it has pv-ops in its
code path, which don't work that early.
Split out the idt_data initialization part from set_intr_gate() so
that it can be used separatly.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/idt.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index a8fc01ea602a..c752027abc9e 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -231,18 +231,24 @@ idt_setup_from_table(gate_desc *idt, const struct idt_data
*t, int size, bool sy
}
}
+static void init_idt_data(struct idt_data *data, unsigned int n,
+ const void *addr)
+{
+ BUG_ON(n > 0xFF);
+
+ memset(data, 0, sizeof(*data));
+ data->vector = n;
+ data->addr = addr;
+ data->segment = __KERNEL_CS;
+ data->bits.type = GATE_INTERRUPT;
+ data->bits.p = 1;
+}
+
static void set_intr_gate(unsigned int n, const void *addr)
{
struct idt_data data;
- BUG_ON(n > 0xFF);
-
- memset(&data, 0, sizeof(data));
- data.vector = n;
- data.addr = addr;
- data.segment = __KERNEL_CS;
- data.bits.type = GATE_INTERRUPT;
- data.bits.p = 1;
+ init_idt_data(&data, n, addr);
idt_setup_from_table(idt_table, &data, 1, false);
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 30/75] x86/idt: Move two function from k/idt.c to i/a/desc.h
From: Joerg Roedel <jroedel at suse.de>
Move these two functions from kernel/idt.c to include/asm/desc.h:
* init_idt_data()
* idt_init_desc()
These functions are needed to setup IDT entries very early and need to
be called from head64.c. To be usable this early these functions need to
be compiled without instrumentation and the stack-protector feature.
These features need to be kept enabled for kernel/idt.c, so head64.c
must use its own versions.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/desc.h | 27 +++++++++++++++++++++++++
arch/x86/include/asm/desc_defs.h | 7 +++++++
arch/x86/kernel/idt.c | 34 --------------------------------
3 files changed, 34 insertions(+), 34 deletions(-)
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index 68a99d2a5f33..80bf63c08007 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -389,6 +389,33 @@ static inline void set_desc_limit(struct desc_struct *desc,
unsigned long limit)
void update_intr_gate(unsigned int n, const void *addr);
void alloc_intr_gate(unsigned int n, const void *addr);
+static inline void init_idt_data(struct idt_data *data, unsigned int n,
+ const void *addr)
+{
+ BUG_ON(n > 0xFF);
+
+ memset(data, 0, sizeof(*data));
+ data->vector = n;
+ data->addr = addr;
+ data->segment = __KERNEL_CS;
+ data->bits.type = GATE_INTERRUPT;
+ data->bits.p = 1;
+}
+
+static inline void idt_init_desc(gate_desc *gate, const struct idt_data *d)
+{
+ unsigned long addr = (unsigned long) d->addr;
+
+ gate->offset_low = (u16) addr;
+ gate->segment = (u16) d->segment;
+ gate->bits = d->bits;
+ gate->offset_middle = (u16) (addr >> 16);
+#ifdef CONFIG_X86_64
+ gate->offset_high = (u32) (addr >> 32);
+ gate->reserved = 0;
+#endif
+}
+
extern unsigned long system_vectors[];
#ifdef CONFIG_X86_64
diff --git a/arch/x86/include/asm/desc_defs.h b/arch/x86/include/asm/desc_defs.h
index 5621fb3f2d1a..f7e7099af595 100644
--- a/arch/x86/include/asm/desc_defs.h
+++ b/arch/x86/include/asm/desc_defs.h
@@ -74,6 +74,13 @@ struct idt_bits {
p : 1;
} __attribute__((packed));
+struct idt_data {
+ unsigned int vector;
+ unsigned int segment;
+ struct idt_bits bits;
+ const void *addr;
+};
+
struct gate_struct {
u16 offset_low;
u16 segment;
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index c752027abc9e..4a2c7791c697 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -9,13 +9,6 @@
#include <asm/desc.h>
#include <asm/hw_irq.h>
-struct idt_data {
- unsigned int vector;
- unsigned int segment;
- struct idt_bits bits;
- const void *addr;
-};
-
#define DPL0 0x0
#define DPL3 0x3
@@ -204,20 +197,6 @@ const struct desc_ptr debug_idt_descr = {
};
#endif
-static inline void idt_init_desc(gate_desc *gate, const struct idt_data *d)
-{
- unsigned long addr = (unsigned long) d->addr;
-
- gate->offset_low = (u16) addr;
- gate->segment = (u16) d->segment;
- gate->bits = d->bits;
- gate->offset_middle = (u16) (addr >> 16);
-#ifdef CONFIG_X86_64
- gate->offset_high = (u32) (addr >> 32);
- gate->reserved = 0;
-#endif
-}
-
static void
idt_setup_from_table(gate_desc *idt, const struct idt_data *t, int size, bool
sys)
{
@@ -231,19 +210,6 @@ idt_setup_from_table(gate_desc *idt, const struct idt_data
*t, int size, bool sy
}
}
-static void init_idt_data(struct idt_data *data, unsigned int n,
- const void *addr)
-{
- BUG_ON(n > 0xFF);
-
- memset(data, 0, sizeof(*data));
- data->vector = n;
- data->addr = addr;
- data->segment = __KERNEL_CS;
- data->bits.type = GATE_INTERRUPT;
- data->bits.p = 1;
-}
-
static void set_intr_gate(unsigned int n, const void *addr)
{
struct idt_data data;
--
2.17.1
From: Joerg Roedel <jroedel at suse.de> Handling exceptions during boot requires a working GDT. The kernel GDT is not yet ready for use, so install a temporary boot GDT. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/head_64.S | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 4bbc770af632..11a28c1fb51f 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -72,6 +72,26 @@ SYM_CODE_START_NOALIGN(startup_64) /* Set up the stack for verify_cpu(), similar to initial_stack below */ leaq (__end_init_task - SIZEOF_PTREGS)(%rip), %rsp + /* Setup boot GDT descriptor and load boot GDT */ + leaq boot_gdt(%rip), %rax + movq %rax, boot_gdt_base(%rip) + lgdt boot_gdt_descr(%rip) + + /* New GDT is live - reload data segment registers */ + movl $__KERNEL_DS, %eax + movl %eax, %ds + movl %eax, %ss + movl %eax, %es + + /* Now switch to __KERNEL_CS so IRET works reliably */ + pushq $__KERNEL_CS + leaq .Lon_kernel_cs(%rip), %rax + pushq %rax + lretq + +.Lon_kernel_cs: + UNWIND_HINT_EMPTY + /* Sanitize CPU configuration */ call verify_cpu @@ -480,6 +500,22 @@ SYM_DATA_LOCAL(early_gdt_descr_base, .quad INIT_PER_CPU_VAR(gdt_page)) SYM_DATA(phys_base, .quad 0x0) EXPORT_SYMBOL(phys_base) +/* Boot GDT used when kernel addresses are not mapped yet */ +SYM_DATA_LOCAL(boot_gdt_descr, .word boot_gdt_end - boot_gdt) +SYM_DATA_LOCAL(boot_gdt_base, .quad 0) +SYM_DATA_START(boot_gdt) + .quad 0 + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */ + .quad 0x00af9a000000ffff /* __KERNEL_CS */ + .quad 0x00cf92000000ffff /* __KERNEL_DS */ + .quad 0 /* __USER32_CS - unused */ + .quad 0 /* __USER_DS - unused */ + .quad 0 /* __USER_CS - unused */ + .quad 0 /* unused */ + .quad 0x0080890000000000 /* TSS descriptor */ + .quad 0x0000000000000000 /* TSS continued */ +SYM_DATA_END_LABEL(boot_gdt, SYM_L_LOCAL, boot_gdt_end) + #include "../../x86/xen/xen-head.S" __PAGE_ALIGNED_BSS -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 32/75] x86/head/64: Reload GDT after switch to virtual addresses
From: Joerg Roedel <jroedel at suse.de> Reload the GDT after switching to virtual addresses to make sure it will not go away when the lower mappings are removed. This will also reload the GDT for booting APs, which will need a working GDT too to handle #VC exceptions. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/head_64.S | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 11a28c1fb51f..20a9df062088 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -163,6 +163,11 @@ SYM_CODE_START(secondary_startup_64) 1: UNWIND_HINT_EMPTY + /* Setup boot GDT descriptor and load boot GDT */ + leaq boot_gdt(%rip), %rax + movq %rax, boot_gdt_base(%rip) + lgdt boot_gdt_descr(%rip) + /* Check if nx is implemented */ movl $0x80000001, %eax cpuid -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 33/75] x86/head/64: Load segment registers earlier
From: Joerg Roedel <jroedel at suse.de> Make sure segments are properly set up before setting up an IDT and doing anything that might cause a #VC exception. This is later needed for early exception handling. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/head_64.S | 52 +++++++++++++++++++-------------------- 1 file changed, 26 insertions(+), 26 deletions(-) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 20a9df062088..b5ff38bb32f2 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -168,6 +168,32 @@ SYM_CODE_START(secondary_startup_64) movq %rax, boot_gdt_base(%rip) lgdt boot_gdt_descr(%rip) + /* set up data segments */ + xorl %eax,%eax + movl %eax,%ds + movl %eax,%ss + movl %eax,%es + + /* + * We don't really need to load %fs or %gs, but load them anyway + * to kill any stale realmode selectors. This allows execution + * under VT hardware. + */ + movl %eax,%fs + movl %eax,%gs + + /* Set up %gs. + * + * The base of %gs always points to fixed_percpu_data. If the + * stack protector canary is enabled, it is located at %gs:40. + * Note that, on SMP, the boot cpu uses init data section until + * the per cpu areas are set up. + */ + movl $MSR_GS_BASE,%ecx + movl initial_gs(%rip),%eax + movl initial_gs+4(%rip),%edx + wrmsr + /* Check if nx is implemented */ movl $0x80000001, %eax cpuid @@ -203,32 +229,6 @@ SYM_CODE_START(secondary_startup_64) */ lgdt early_gdt_descr(%rip) - /* set up data segments */ - xorl %eax,%eax - movl %eax,%ds - movl %eax,%ss - movl %eax,%es - - /* - * We don't really need to load %fs or %gs, but load them anyway - * to kill any stale realmode selectors. This allows execution - * under VT hardware. - */ - movl %eax,%fs - movl %eax,%gs - - /* Set up %gs. - * - * The base of %gs always points to fixed_percpu_data. If the - * stack protector canary is enabled, it is located at %gs:40. - * Note that, on SMP, the boot cpu uses init data section until - * the per cpu areas are set up. - */ - movl $MSR_GS_BASE,%ecx - movl initial_gs(%rip),%eax - movl initial_gs+4(%rip),%edx - wrmsr - /* rsi is pointer to real mode structure with interesting info. pass it to C */ movq %rsi, %rdi -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 34/75] x86/head/64: Switch to initial stack earlier
From: Joerg Roedel <jroedel at suse.de> Make sure there is a stack once the kernel runs from virual addresses. At this stage any secondary CPU which boots will have lost its stack because the kernel switched to a new page-table which does not map the real-mode stack anymore. This is needed for handling early #VC exceptions caused by instructions like CPUID. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/head_64.S | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index b5ff38bb32f2..301a76f317f3 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -194,6 +194,12 @@ SYM_CODE_START(secondary_startup_64) movl initial_gs+4(%rip),%edx wrmsr + /* + * Setup a boot time stack - Any secondary CPU will have lost its stack + * by now because the cr3-switch above unmaps the real-mode stack + */ + movq initial_stack(%rip), %rsp + /* Check if nx is implemented */ movl $0x80000001, %eax cpuid @@ -214,9 +220,6 @@ SYM_CODE_START(secondary_startup_64) /* Make changes effective */ movq %rax, %cr0 - /* Setup a boot time stack */ - movq initial_stack(%rip), %rsp - /* zero EFLAGS after setting rsp */ pushq $0 popfq -- 2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 35/75] x86/head/64: Build k/head64.c with -fno-stack-protector
From: Joerg Roedel <jroedel at suse.de> The code inserted by the stack protector does not work in the early boot environment because it uses the GS segment, at least with memory encryption enabled. Make sure the early code is compiled without this feature enabled. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index ba89cabe5fcf..1192de38fa56 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -35,6 +35,10 @@ ifdef CONFIG_FRAME_POINTER OBJECT_FILES_NON_STANDARD_ftrace_$(BITS).o := y endif +# make sure head64.c is built without stack protector +nostackp := $(call cc-option, -fno-stack-protector) +CFLAGS_head64.o := $(nostackp) + # If instrumentation of this dir is enabled, boot hangs during first second. # Probably could be more selective here, but note that files related to irqs, # boot, dumpstack/stacktrace, etc are either non-interesting or can lead to -- 2.17.1
From: Joerg Roedel <jroedel at suse.de>
Load the IDT right after switching to virtual addresses in head_64.S
so that the kernel can handle #VC exceptions.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/head64.c | 15 +++++++++++++++
arch/x86/kernel/head_64.S | 17 +++++++++++++++++
2 files changed, 32 insertions(+)
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 206a4b6144c2..0ecdf28291fc 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -489,3 +489,18 @@ void __init x86_64_start_reservations(char *real_mode_data)
start_kernel();
}
+
+void __head early_idt_setup_early_handler(unsigned long physaddr)
+{
+ gate_desc *idt = fixup_pointer(idt_table, physaddr);
+ int i;
+
+ for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) {
+ struct idt_data data;
+ gate_desc desc;
+
+ init_idt_data(&data, i, early_idt_handler_array[i]);
+ idt_init_desc(&desc, &data);
+ native_write_idt_entry(idt, i, &desc);
+ }
+}
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 301a76f317f3..c63e6bd432da 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -104,6 +104,20 @@ SYM_CODE_START_NOALIGN(startup_64)
leaq _text(%rip), %rdi
pushq %rsi
call __startup_64
+ /* Save return value */
+ pushq %rax
+
+ /*
+ * Load IDT with early handlers - needed for SEV-ES
+ * Do this here because this must only happen on the boot CPU
+ * and the code below is shared with secondary CPU bringup.
+ */
+ leaq _text(%rip), %rdi
+ call early_idt_setup_early_handler
+
+ /* Restore __startup_64 return value*/
+ popq %rax
+ /* Restore pointer to real_mode_data */
popq %rsi
/* Form the CR3 value being sure to include the CR3 modifier */
@@ -200,6 +214,9 @@ SYM_CODE_START(secondary_startup_64)
*/
movq initial_stack(%rip), %rsp
+ /* Load IDT */
+ lidt idt_descr(%rip)
+
/* Check if nx is implemented */
movl $0x80000001, %eax
cpuid
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 37/75] x86/head/64: Move early exception dispatch to C code
From: Joerg Roedel <jroedel at suse.de>
Move the assembly coded dispatch between page-faults and all other
exceptions to C code to make it easier to maintain and extend.
Also change the return-type of early_make_pgtable() to bool and make it
static.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/pgtable.h | 2 +-
arch/x86/include/asm/setup.h | 1 -
arch/x86/kernel/head64.c | 19 +++++++++++++++----
arch/x86/kernel/head_64.S | 11 +----------
4 files changed, 17 insertions(+), 16 deletions(-)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 4d02e64af1b3..1ffb4707e3e3 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -28,7 +28,7 @@
#include <asm-generic/pgtable_uffd.h>
extern pgd_t early_top_pgt[PTRS_PER_PGD];
-int __init __early_make_pgtable(unsigned long address, pmdval_t pmd);
+bool __init __early_make_pgtable(unsigned long address, pmdval_t pmd);
void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm);
void ptdump_walk_pgd_level_debugfs(struct seq_file *m, struct mm_struct *mm,
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index ed8ec011a9fd..d8a39d45f182 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -48,7 +48,6 @@ extern void reserve_standard_io_resources(void);
extern void i386_reserve_resources(void);
extern unsigned long __startup_64(unsigned long physaddr, struct boot_params
*bp);
extern unsigned long __startup_secondary_64(void);
-extern int early_make_pgtable(unsigned long address);
#ifdef CONFIG_X86_INTEL_MID
extern void x86_intel_mid_early_setup(void);
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 0ecdf28291fc..474f121d50f6 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -36,6 +36,8 @@
#include <asm/microcode.h>
#include <asm/kasan.h>
#include <asm/fixmap.h>
+#include <asm/extable.h>
+#include <asm/trap_defs.h>
/*
* Manage page tables very early on.
@@ -297,7 +299,7 @@ static void __init reset_early_page_tables(void)
}
/* Create a new PMD entry */
-int __init __early_make_pgtable(unsigned long address, pmdval_t pmd)
+bool __init __early_make_pgtable(unsigned long address, pmdval_t pmd)
{
unsigned long physaddr = address - __PAGE_OFFSET;
pgdval_t pgd, *pgd_p;
@@ -307,7 +309,7 @@ int __init __early_make_pgtable(unsigned long address,
pmdval_t pmd)
/* Invalid address or early pgt is done ? */
if (physaddr >= MAXMEM || read_cr3_pa() != __pa_nodebug(early_top_pgt))
- return -1;
+ return false;
again:
pgd_p = &early_top_pgt[pgd_index(address)].pgd;
@@ -364,10 +366,10 @@ int __init __early_make_pgtable(unsigned long address,
pmdval_t pmd)
}
pmd_p[pmd_index(address)] = pmd;
- return 0;
+ return true;
}
-int __init early_make_pgtable(unsigned long address)
+static bool __init early_make_pgtable(unsigned long address)
{
unsigned long physaddr = address - __PAGE_OFFSET;
pmdval_t pmd;
@@ -377,6 +379,15 @@ int __init early_make_pgtable(unsigned long address)
return __early_make_pgtable(address, pmd);
}
+void __init do_early_exception(struct pt_regs *regs, int trapnr)
+{
+ if (trapnr == X86_TRAP_PF &&
+ early_make_pgtable(native_read_cr2()))
+ return;
+
+ early_fixup_exception(regs, trapnr);
+}
+
/* Don't add a printk in there. printk relies on the PDA which is not
initialized
yet. */
static void __init clear_bss(void)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index c63e6bd432da..aca3beb336ce 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -363,18 +363,9 @@ SYM_CODE_START_LOCAL(early_idt_handler_common)
pushq %r15 /* pt_regs->r15 */
UNWIND_HINT_REGS
- cmpq $14,%rsi /* Page fault? */
- jnz 10f
- GET_CR2_INTO(%rdi) /* can clobber %rax if pv */
- call early_make_pgtable
- andl %eax,%eax
- jz 20f /* All good */
-
-10:
movq %rsp,%rdi /* RDI = pt_regs; RSI is already trapnr */
- call early_fixup_exception
+ call do_early_exception
-20:
decl early_recursion_flag(%rip)
jmp restore_regs_and_return_to_kernel
SYM_CODE_END(early_idt_handler_common)
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 38/75] x86/sev-es: Add SEV-ES Feature Detection
From: Joerg Roedel <jroedel at suse.de>
Add the sev_es_active function for checking whether SEV-ES is enabled.
Also cache the value of MSR_AMD64_SEV at boot to speed up the feature
checking in the running code.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/mem_encrypt.h | 3 +++
arch/x86/include/asm/msr-index.h | 2 ++
arch/x86/mm/mem_encrypt.c | 10 +++++++++-
arch/x86/mm/mem_encrypt_identity.c | 3 +++
4 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/mem_encrypt.h
b/arch/x86/include/asm/mem_encrypt.h
index 848ce43b9040..6f61bb93366a 100644
--- a/arch/x86/include/asm/mem_encrypt.h
+++ b/arch/x86/include/asm/mem_encrypt.h
@@ -19,6 +19,7 @@
#ifdef CONFIG_AMD_MEM_ENCRYPT
extern u64 sme_me_mask;
+extern u64 sev_status;
extern bool sev_enabled;
void sme_encrypt_execute(unsigned long encrypted_kernel_vaddr,
@@ -49,6 +50,7 @@ void __init mem_encrypt_free_decrypted_mem(void);
bool sme_active(void);
bool sev_active(void);
+bool sev_es_active(void);
#define __bss_decrypted
__attribute__((__section__(".bss..decrypted")))
@@ -71,6 +73,7 @@ static inline void __init sme_enable(struct boot_params *bp) {
}
static inline bool sme_active(void) { return false; }
static inline bool sev_active(void) { return false; }
+static inline bool sev_es_active(void) { return false; }
static inline int __init
early_set_memory_decrypted(unsigned long vaddr, unsigned long size) { return 0;
}
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 198aa06778ce..22b35e15b8e0 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -444,7 +444,9 @@
#define MSR_AMD64_SEV_ES_GHCB 0xc0010130
#define MSR_AMD64_SEV 0xc0010131
#define MSR_AMD64_SEV_ENABLED_BIT 0
+#define MSR_AMD64_SEV_ES_ENABLED_BIT 1
#define MSR_AMD64_SEV_ENABLED BIT_ULL(MSR_AMD64_SEV_ENABLED_BIT)
+#define MSR_AMD64_SEV_ES_ENABLED BIT_ULL(MSR_AMD64_SEV_ES_ENABLED_BIT)
#define MSR_AMD64_VIRT_SPEC_CTRL 0xc001011f
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index a03614bd3e1a..3e59fcd7f9ac 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -38,6 +38,7 @@
* section is later cleared.
*/
u64 sme_me_mask __section(.data) = 0;
+u64 sev_status __section(.data) = 0;
EXPORT_SYMBOL(sme_me_mask);
DEFINE_STATIC_KEY_FALSE(sev_enable_key);
EXPORT_SYMBOL_GPL(sev_enable_key);
@@ -347,9 +348,16 @@ bool sme_active(void)
bool sev_active(void)
{
- return sme_me_mask && sev_enabled;
+ return !!(sev_status & MSR_AMD64_SEV_ENABLED);
}
+bool sev_es_active(void)
+{
+ return !!(sev_status & MSR_AMD64_SEV_ES_ENABLED);
+}
+EXPORT_SYMBOL_GPL(sev_es_active);
+
+
/* Override for DMA direct allocation check - ARCH_HAS_FORCE_DMA_UNENCRYPTED */
bool force_dma_unencrypted(struct device *dev)
{
diff --git a/arch/x86/mm/mem_encrypt_identity.c
b/arch/x86/mm/mem_encrypt_identity.c
index e2b0e2ac07bb..68d75379e06a 100644
--- a/arch/x86/mm/mem_encrypt_identity.c
+++ b/arch/x86/mm/mem_encrypt_identity.c
@@ -540,6 +540,9 @@ void __init sme_enable(struct boot_params *bp)
if (!(msr & MSR_AMD64_SEV_ENABLED))
return;
+ /* Save SEV_STATUS to avoid reading MSR again */
+ sev_status = msr;
+
/* SEV state cannot be controlled by a command line option */
sme_me_mask = me_mask;
sev_enabled = true;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 39/75] x86/sev-es: Print SEV-ES info into kernel log
From: Joerg Roedel <jroedel at suse.de>
Refactor the message printed to the kernel log which indicates whether
SEV or SME is active to print a list of enabled encryption features.
This will scale better in the future when more memory encryption
features might be added. Also add SEV-ES to the list of features.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/mm/mem_encrypt.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 3e59fcd7f9ac..c8d8eabfa1bc 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -409,6 +409,31 @@ void __init mem_encrypt_free_decrypted_mem(void)
free_init_pages("unused decrypted", vaddr, vaddr_end);
}
+static void print_mem_encrypt_feature_info(void)
+{
+ pr_info("AMD Memory Encryption Features active:");
+
+ /* Secure Memory Encryption */
+ if (sme_active()) {
+ /*
+ * SME is mutually exclusive with any of the SEV
+ * features below.
+ */
+ pr_cont(" SME\n");
+ return;
+ }
+
+ /* Secure Encrypted Virtualization */
+ if (sev_active())
+ pr_cont(" SEV");
+
+ /* Encrypted Register State */
+ if (sev_es_active())
+ pr_cont(" SEV-ES");
+
+ pr_cont("\n");
+}
+
void __init mem_encrypt_init(void)
{
if (!sme_me_mask)
@@ -423,8 +448,6 @@ void __init mem_encrypt_init(void)
if (sev_active())
static_branch_enable(&sev_enable_key);
- pr_info("AMD %s active\n",
- sev_active() ? "Secure Encrypted Virtualization (SEV)"
- : "Secure Memory Encryption (SME)");
+ print_mem_encrypt_feature_info();
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 40/75] x86/sev-es: Compile early handler code into kernel image
From: Joerg Roedel <jroedel at suse.de>
Setup sev-es.c and include the code from the
pre-decompression stage to also build it into the image of the running
kernel. Temporarily add __maybe_unused annotations to avoid build
warnings until the functions get used.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/sev-es-shared.c | 21 ++--
arch/x86/kernel/sev-es.c | 163 ++++++++++++++++++++++++++++++++
3 files changed, 175 insertions(+), 10 deletions(-)
create mode 100644 arch/x86/kernel/sev-es.c
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 1192de38fa56..f5a9bceb376a 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -148,6 +148,7 @@ obj-$(CONFIG_UNWINDER_ORC) += unwind_orc.o
obj-$(CONFIG_UNWINDER_FRAME_POINTER) += unwind_frame.o
obj-$(CONFIG_UNWINDER_GUESS) += unwind_guess.o
+obj-$(CONFIG_AMD_MEM_ENCRYPT) += sev-es.o
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 3d645662ff10..5703f9b17e70 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -9,7 +9,7 @@
* and is included directly into both code-bases.
*/
-static void sev_es_terminate(unsigned int reason)
+static void __maybe_unused sev_es_terminate(unsigned int reason)
{
u64 val = GHCB_SEV_TERMINATE;
@@ -27,7 +27,7 @@ static void sev_es_terminate(unsigned int reason)
asm volatile("hlt\n" : : : "memory");
}
-static bool sev_es_negotiate_protocol(void)
+static bool __maybe_unused sev_es_negotiate_protocol(void)
{
u64 val;
@@ -46,7 +46,7 @@ static bool sev_es_negotiate_protocol(void)
return true;
}
-static void vc_ghcb_invalidate(struct ghcb *ghcb)
+static void __maybe_unused vc_ghcb_invalidate(struct ghcb *ghcb)
{
memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
}
@@ -58,9 +58,9 @@ static bool vc_decoding_needed(unsigned long exit_code)
exit_code <= SVM_EXIT_LAST_EXCP);
}
-static enum es_result vc_init_em_ctxt(struct es_em_ctxt *ctxt,
- struct pt_regs *regs,
- unsigned long exit_code)
+static enum es_result __maybe_unused vc_init_em_ctxt(struct es_em_ctxt *ctxt,
+ struct pt_regs *regs,
+ unsigned long exit_code)
{
enum es_result ret = ES_OK;
@@ -73,7 +73,7 @@ static enum es_result vc_init_em_ctxt(struct es_em_ctxt *ctxt,
return ret;
}
-static void vc_finish_insn(struct es_em_ctxt *ctxt)
+static void __maybe_unused vc_finish_insn(struct es_em_ctxt *ctxt)
{
ctxt->regs->ip += ctxt->insn.length;
}
@@ -324,7 +324,8 @@ static enum es_result vc_ioio_exitinfo(struct es_em_ctxt
*ctxt, u64 *exitinfo)
return ES_OK;
}
-static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt
*ctxt)
+static enum es_result __maybe_unused
+vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
u64 exit_info_1, exit_info_2;
@@ -420,8 +421,8 @@ static enum es_result vc_handle_ioio(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
return ret;
}
-static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
- struct es_em_ctxt *ctxt)
+static enum es_result __maybe_unused vc_handle_cpuid(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
u32 cr4 = native_read_cr4();
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
new file mode 100644
index 000000000000..0d20770decce
--- /dev/null
+++ b/arch/x86/kernel/sev-es.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AMD Memory Encryption Support
+ *
+ * Copyright (C) 2019 SUSE
+ *
+ * Author: Joerg Roedel <jroedel at suse.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+
+#include <asm/trap_defs.h>
+#include <asm/sev-es.h>
+#include <asm/insn-eval.h>
+#include <asm/fpu/internal.h>
+#include <asm/processor.h>
+#include <asm/svm.h>
+
+static inline u64 sev_es_rd_ghcb_msr(void)
+{
+ return native_read_msr(MSR_AMD64_SEV_ES_GHCB);
+}
+
+static inline void sev_es_wr_ghcb_msr(u64 val)
+{
+ u32 low, high;
+
+ low = (u32)(val);
+ high = (u32)(val >> 32);
+
+ native_write_msr(MSR_AMD64_SEV_ES_GHCB, low, high);
+}
+
+static int vc_fetch_insn_kernel(struct es_em_ctxt *ctxt,
+ unsigned char *buffer)
+{
+ return probe_kernel_read(buffer, (unsigned char *)ctxt->regs->ip,
+ MAX_INSN_SIZE);
+}
+
+static enum es_result vc_decode_insn(struct es_em_ctxt *ctxt)
+{
+ char buffer[MAX_INSN_SIZE];
+ enum es_result ret;
+ int res;
+
+ res = vc_fetch_insn_kernel(ctxt, buffer);
+ if (unlikely(res == -EFAULT)) {
+ ctxt->fi.vector = X86_TRAP_PF;
+ ctxt->fi.error_code = 0;
+ ctxt->fi.cr2 = ctxt->regs->ip;
+ return ES_EXCEPTION;
+ }
+
+ insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE - res, 1);
+ insn_get_length(&ctxt->insn);
+
+ ret = ctxt->insn.immediate.got ? ES_OK : ES_DECODE_FAILED;
+
+ return ret;
+}
+
+static enum es_result vc_write_mem(struct es_em_ctxt *ctxt,
+ char *dst, char *buf, size_t size)
+{
+ unsigned long error_code = X86_PF_PROT | X86_PF_WRITE;
+ char __user *target = (char __user *)dst;
+ u64 d8;
+ u32 d4;
+ u16 d2;
+ u8 d1;
+
+ switch (size) {
+ case 1:
+ memcpy(&d1, buf, 1);
+ if (put_user(d1, target))
+ goto fault;
+ break;
+ case 2:
+ memcpy(&d2, buf, 2);
+ if (put_user(d2, target))
+ goto fault;
+ break;
+ case 4:
+ memcpy(&d4, buf, 4);
+ if (put_user(d4, target))
+ goto fault;
+ break;
+ case 8:
+ memcpy(&d8, buf, 8);
+ if (put_user(d8, target))
+ goto fault;
+ break;
+ default:
+ WARN_ONCE(1, "%s: Invalid size: %zu\n", __func__, size);
+ return ES_UNSUPPORTED;
+ }
+
+ return ES_OK;
+
+fault:
+ if (user_mode(ctxt->regs))
+ error_code |= X86_PF_USER;
+
+ ctxt->fi.vector = X86_TRAP_PF;
+ ctxt->fi.error_code = error_code;
+ ctxt->fi.cr2 = (unsigned long)dst;
+
+ return ES_EXCEPTION;
+}
+
+static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
+ char *src, char *buf, size_t size)
+{
+ unsigned long error_code = X86_PF_PROT;
+ char __user *s = (char __user *)src;
+ u64 d8;
+ u32 d4;
+ u16 d2;
+ u8 d1;
+
+ switch (size) {
+ case 1:
+ if (get_user(d1, s))
+ goto fault;
+ memcpy(buf, &d1, 1);
+ break;
+ case 2:
+ if (get_user(d2, s))
+ goto fault;
+ memcpy(buf, &d2, 2);
+ break;
+ case 4:
+ if (get_user(d4, s))
+ goto fault;
+ memcpy(buf, &d4, 4);
+ break;
+ case 8:
+ if (get_user(d8, s))
+ goto fault;
+ memcpy(buf, &d8, 8);
+ break;
+ default:
+ WARN_ONCE(1, "%s: Invalid size: %zu\n", __func__, size);
+ return ES_UNSUPPORTED;
+ }
+
+ return ES_OK;
+
+fault:
+ if (user_mode(ctxt->regs))
+ error_code |= X86_PF_USER;
+
+ ctxt->fi.vector = X86_TRAP_PF;
+ ctxt->fi.error_code = error_code;
+ ctxt->fi.cr2 = (unsigned long)src;
+
+ return ES_EXCEPTION;
+}
+
+/* Include code shared with pre-decompression boot stage */
+#include "sev-es-shared.c"
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
Setup an early handler for #VC exceptions. There is no GHCB mapped
yet, so just re-use the vc_no_ghcb_handler. It can only handle CPUID
exit-codes, but that should be enough to get the kernel through
verify_cpu() and __startup_64() until it runs on virtual addresses.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/desc.h | 1 +
arch/x86/include/asm/processor.h | 1 +
arch/x86/include/asm/sev-es.h | 2 ++
arch/x86/kernel/head64.c | 17 +++++++++++++++
arch/x86/kernel/head_64.S | 36 ++++++++++++++++++++++++++++++++
arch/x86/kernel/idt.c | 10 +++++++++
6 files changed, 67 insertions(+)
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index 80bf63c08007..30e2a0e863b6 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -388,6 +388,7 @@ static inline void set_desc_limit(struct desc_struct *desc,
unsigned long limit)
void update_intr_gate(unsigned int n, const void *addr);
void alloc_intr_gate(unsigned int n, const void *addr);
+void set_early_idt_handler(gate_desc *idt, int n, void *handler);
static inline void init_idt_data(struct idt_data *data, unsigned int n,
const void *addr)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 3bcf27caf6c9..e369271bfd33 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -757,6 +757,7 @@ extern int sysenter_setup(void);
/* Defined in head.S */
extern struct desc_ptr early_gdt_descr;
+extern struct desc_ptr early_idt_descr;
extern void switch_to_new_gdt(int);
extern void load_direct_gdt(int);
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index 7c0807b84546..b2cbcd40b52e 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -73,4 +73,6 @@ static inline u64 lower_bits(u64 val, unsigned int bits)
return (val & mask);
}
+extern void vc_no_ghcb(void);
+
#endif
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 474f121d50f6..9586522bfcb3 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -38,6 +38,7 @@
#include <asm/fixmap.h>
#include <asm/extable.h>
#include <asm/trap_defs.h>
+#include <asm/sev-es.h>
/*
* Manage page tables very early on.
@@ -515,3 +516,19 @@ void __head early_idt_setup_early_handler(unsigned long
physaddr)
native_write_idt_entry(idt, i, &desc);
}
}
+
+void __head early_idt_setup(unsigned long physbase)
+{
+ gate_desc *idt = fixup_pointer(idt_table, physbase);
+ void __maybe_unused *handler;
+
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ /* VMM Communication Exception */
+ handler = fixup_pointer(vc_no_ghcb, physbase);
+ set_early_idt_handler(idt, X86_TRAP_VC, handler);
+#endif
+
+ /* Initialize IDT descriptor and load IDT */
+ early_idt_descr.address = (unsigned long)idt;
+ native_load_idt(&early_idt_descr);
+}
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index aca3beb336ce..4d84a0c72e36 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -92,6 +92,12 @@ SYM_CODE_START_NOALIGN(startup_64)
.Lon_kernel_cs:
UNWIND_HINT_EMPTY
+ /* Setup IDT - Needed for SEV-ES */
+ leaq _text(%rip), %rdi
+ pushq %rsi
+ call early_idt_setup
+ popq %rsi
+
/* Sanitize CPU configuration */
call verify_cpu
@@ -370,6 +376,33 @@ SYM_CODE_START_LOCAL(early_idt_handler_common)
jmp restore_regs_and_return_to_kernel
SYM_CODE_END(early_idt_handler_common)
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+/*
+ * VC Exception handler used during very early boot. The
+ * early_idt_handler_array can't be used because it returns via the
+ * paravirtualized INTERRUPT_RETURN and pv-ops don't work that early.
+ */
+SYM_CODE_START_NOALIGN(vc_no_ghcb)
+ UNWIND_HINT_IRET_REGS offset=8
+
+ /* Build pt_regs */
+ PUSH_AND_CLEAR_REGS
+
+ /* Call C handler */
+ movq %rsp, %rdi
+ movq ORIG_RAX(%rsp), %rsi
+ call do_vc_no_ghcb
+
+ /* Unwind pt_regs */
+ POP_REGS
+
+ /* Remove Error Code */
+ addq $8, %rsp
+
+ /* Pure iret required here - don't use INTERRUPT_RETURN */
+ iretq
+SYM_CODE_END(vc_no_ghcb)
+#endif
#define SYM_DATA_START_PAGE_ALIGNED(name) \
SYM_START(name, SYM_L_GLOBAL, .balign PAGE_SIZE)
@@ -511,6 +544,9 @@ SYM_DATA_END(level1_fixmap_pgt)
SYM_DATA(early_gdt_descr, .word GDT_ENTRIES*8-1)
SYM_DATA_LOCAL(early_gdt_descr_base, .quad INIT_PER_CPU_VAR(gdt_page))
+SYM_DATA(early_idt_descr, .word NUM_EXCEPTION_VECTORS * 16)
+SYM_DATA_LOCAL(early_idt_descr_base, .quad 0)
+
.align 16
/* This must match the first entry in level2_kernel_pgt */
SYM_DATA(phys_base, .quad 0x0)
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 4a2c7791c697..135d208a2d38 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -341,3 +341,13 @@ void alloc_intr_gate(unsigned int n, const void *addr)
if (!test_and_set_bit(n, system_vectors))
set_intr_gate(n, addr);
}
+
+void set_early_idt_handler(gate_desc *idt, int n, void *handler)
+{
+ struct idt_data data;
+ gate_desc desc;
+
+ init_idt_data(&data, n, handler);
+ idt_init_desc(&desc, &data);
+ native_write_idt_entry(idt, n, &desc);
+}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 42/75] x86/sev-es: Setup GHCB based boot #VC handler
From: Joerg Roedel <jroedel at suse.de>
Add the infrastructure to handle #VC exceptions when the kernel runs
on virtual addresses and has a GHCB mapped. This handler will be used
until the runtime #VC handler takes over.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/segment.h | 2 +-
arch/x86/include/asm/sev-es.h | 1 +
arch/x86/kernel/head64.c | 6 ++
arch/x86/kernel/sev-es-shared.c | 14 ++--
arch/x86/kernel/sev-es.c | 116 ++++++++++++++++++++++++++++++++
arch/x86/mm/extable.c | 1 +
6 files changed, 132 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index 6669164abadc..5b648066504c 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -230,7 +230,7 @@
#define NUM_EXCEPTION_VECTORS 32
/* Bitmask of exception vectors which push an error code on the stack: */
-#define EXCEPTION_ERRCODE_MASK 0x00027d00
+#define EXCEPTION_ERRCODE_MASK 0x20027d00
#define GDT_SIZE (GDT_ENTRIES*8)
#define GDT_ENTRY_TLS_ENTRIES 3
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index b2cbcd40b52e..e1ed963a57ec 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -74,5 +74,6 @@ static inline u64 lower_bits(u64 val, unsigned int bits)
}
extern void vc_no_ghcb(void);
+extern bool vc_boot_ghcb(struct pt_regs *regs);
#endif
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 9586522bfcb3..d83d59c15548 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -386,6 +386,12 @@ void __init do_early_exception(struct pt_regs *regs, int
trapnr)
early_make_pgtable(native_read_cr2()))
return;
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ if (trapnr == X86_TRAP_VC &&
+ vc_boot_ghcb(regs))
+ return;
+#endif
+
early_fixup_exception(regs, trapnr);
}
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 5703f9b17e70..3d2299fb5e3f 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -9,7 +9,7 @@
* and is included directly into both code-bases.
*/
-static void __maybe_unused sev_es_terminate(unsigned int reason)
+static void sev_es_terminate(unsigned int reason)
{
u64 val = GHCB_SEV_TERMINATE;
@@ -27,7 +27,7 @@ static void __maybe_unused sev_es_terminate(unsigned int
reason)
asm volatile("hlt\n" : : : "memory");
}
-static bool __maybe_unused sev_es_negotiate_protocol(void)
+static bool sev_es_negotiate_protocol(void)
{
u64 val;
@@ -46,7 +46,7 @@ static bool __maybe_unused sev_es_negotiate_protocol(void)
return true;
}
-static void __maybe_unused vc_ghcb_invalidate(struct ghcb *ghcb)
+static void vc_ghcb_invalidate(struct ghcb *ghcb)
{
memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
}
@@ -58,9 +58,9 @@ static bool vc_decoding_needed(unsigned long exit_code)
exit_code <= SVM_EXIT_LAST_EXCP);
}
-static enum es_result __maybe_unused vc_init_em_ctxt(struct es_em_ctxt *ctxt,
- struct pt_regs *regs,
- unsigned long exit_code)
+static enum es_result vc_init_em_ctxt(struct es_em_ctxt *ctxt,
+ struct pt_regs *regs,
+ unsigned long exit_code)
{
enum es_result ret = ES_OK;
@@ -73,7 +73,7 @@ static enum es_result __maybe_unused vc_init_em_ctxt(struct
es_em_ctxt *ctxt,
return ret;
}
-static void __maybe_unused vc_finish_insn(struct es_em_ctxt *ctxt)
+static void vc_finish_insn(struct es_em_ctxt *ctxt)
{
ctxt->regs->ip += ctxt->insn.length;
}
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 0d20770decce..9de5bb23cb0a 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -7,7 +7,9 @@
* Author: Joerg Roedel <jroedel at suse.de>
*/
+#include <linux/sched/debug.h> /* For show_regs() */
#include <linux/kernel.h>
+#include <linux/printk.h>
#include <linux/mm.h>
#include <asm/trap_defs.h>
@@ -15,8 +17,21 @@
#include <asm/insn-eval.h>
#include <asm/fpu/internal.h>
#include <asm/processor.h>
+#include <asm/trap_defs.h>
#include <asm/svm.h>
+/* For early boot hypervisor communication in SEV-ES enabled guests */
+static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE);
+
+/*
+ * Needs to be in the .data section because we need it NULL before bss is
+ * cleared
+ */
+static struct ghcb __initdata *boot_ghcb;
+
+/* Needed in vc_early_vc_forward_exception */
+void do_early_exception(struct pt_regs *regs, int trapnr);
+
static inline u64 sev_es_rd_ghcb_msr(void)
{
return native_read_msr(MSR_AMD64_SEV_ES_GHCB);
@@ -161,3 +176,104 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
/* Include code shared with pre-decompression boot stage */
#include "sev-es-shared.c"
+
+/*
+ * This function runs on the first #VC exception after the kernel
+ * switched to virtual addresses.
+ */
+static bool __init sev_es_setup_ghcb(void)
+{
+ /* First make sure the hypervisor talks a supported protocol. */
+ if (!sev_es_negotiate_protocol())
+ return false;
+ /*
+ * Clear the boot_ghcb. The first exception comes in before the bss
+ * section is cleared.
+ */
+ memset(&boot_ghcb_page, 0, PAGE_SIZE);
+
+ /* Alright - Make the boot-ghcb public */
+ boot_ghcb = &boot_ghcb_page;
+
+ return true;
+}
+
+static void __init vc_early_vc_forward_exception(struct es_em_ctxt *ctxt)
+{
+ int trapnr = ctxt->fi.vector;
+
+ if (trapnr == X86_TRAP_PF)
+ native_write_cr2(ctxt->fi.cr2);
+
+ ctxt->regs->orig_ax = ctxt->fi.error_code;
+ do_early_exception(ctxt->regs, trapnr);
+}
+
+static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
+ struct ghcb *ghcb,
+ unsigned long exit_code)
+{
+ enum es_result result;
+
+ switch (exit_code) {
+ default:
+ /*
+ * Unexpected #VC exception
+ */
+ result = ES_UNSUPPORTED;
+ }
+
+ return result;
+}
+
+bool __init vc_boot_ghcb(struct pt_regs *regs)
+{
+ unsigned long exit_code = regs->orig_ax;
+ struct es_em_ctxt ctxt;
+ enum es_result result;
+
+ /* Do initial setup or terminate the guest */
+ if (unlikely(boot_ghcb == NULL && !sev_es_setup_ghcb()))
+ sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
+
+ vc_ghcb_invalidate(boot_ghcb);
+ result = vc_init_em_ctxt(&ctxt, regs, exit_code);
+
+ if (result == ES_OK)
+ result = vc_handle_exitcode(&ctxt, boot_ghcb, exit_code);
+
+ /* Done - now check the result */
+ switch (result) {
+ case ES_OK:
+ vc_finish_insn(&ctxt);
+ break;
+ case ES_UNSUPPORTED:
+ early_printk("PANIC: Unsupported exit-code 0x%02lx in early #VC
exception (IP: 0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_VMM_ERROR:
+ early_printk("PANIC: Failure in communication with VMM (exit-code
0x%02lx IP: 0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_DECODE_FAILED:
+ early_printk("PANIC: Failed to decode instruction (exit-code 0x%02lx IP:
0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_EXCEPTION:
+ vc_early_vc_forward_exception(&ctxt);
+ break;
+ case ES_RETRY:
+ /* Nothing to do */
+ break;
+ default:
+ BUG();
+ }
+
+ return true;
+
+fail:
+ show_regs(regs);
+
+ while (true)
+ halt();
+}
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
index b991aa4bdfae..5bcbd413b409 100644
--- a/arch/x86/mm/extable.c
+++ b/arch/x86/mm/extable.c
@@ -5,6 +5,7 @@
#include <xen/xen.h>
#include <asm/fpu/internal.h>
+#include <asm/sev-es.h>
#include <asm/traps.h>
#include <asm/kdebug.h>
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 43/75] x86/sev-es: Setup per-cpu GHCBs for the runtime handler
From: Tom Lendacky <thomas.lendacky at amd.com>
The runtime handler needs a GHCB per CPU. Set them up and map them
unencrypted.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/mem_encrypt.h | 2 ++
arch/x86/kernel/sev-es.c | 56 +++++++++++++++++++++++++++++-
arch/x86/kernel/traps.c | 3 ++
3 files changed, 60 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/mem_encrypt.h
b/arch/x86/include/asm/mem_encrypt.h
index 6f61bb93366a..af3e58aa1603 100644
--- a/arch/x86/include/asm/mem_encrypt.h
+++ b/arch/x86/include/asm/mem_encrypt.h
@@ -48,6 +48,7 @@ int __init early_set_memory_encrypted(unsigned long vaddr,
unsigned long size);
void __init mem_encrypt_init(void);
void __init mem_encrypt_free_decrypted_mem(void);
+void __init sev_es_init_vc_handling(void);
bool sme_active(void);
bool sev_active(void);
bool sev_es_active(void);
@@ -71,6 +72,7 @@ static inline void __init sme_early_init(void) { }
static inline void __init sme_encrypt_kernel(struct boot_params *bp) { }
static inline void __init sme_enable(struct boot_params *bp) { }
+static inline void sev_es_init_vc_handling(void) { }
static inline bool sme_active(void) { return false; }
static inline bool sev_active(void) { return false; }
static inline bool sev_es_active(void) { return false; }
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 9de5bb23cb0a..a43d80d5e50e 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -8,8 +8,13 @@
*/
#include <linux/sched/debug.h> /* For show_regs() */
-#include <linux/kernel.h>
+#include <linux/percpu-defs.h>
+#include <linux/mem_encrypt.h>
#include <linux/printk.h>
+#include <linux/mm_types.h>
+#include <linux/set_memory.h>
+#include <linux/memblock.h>
+#include <linux/kernel.h>
#include <linux/mm.h>
#include <asm/trap_defs.h>
@@ -29,6 +34,13 @@ static struct ghcb boot_ghcb_page __bss_decrypted
__aligned(PAGE_SIZE);
*/
static struct ghcb __initdata *boot_ghcb;
+/* #VC handler runtime per-cpu data */
+struct sev_es_runtime_data {
+ struct ghcb ghcb_page;
+};
+
+static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
+
/* Needed in vc_early_vc_forward_exception */
void do_early_exception(struct pt_regs *regs, int trapnr);
@@ -198,6 +210,48 @@ static bool __init sev_es_setup_ghcb(void)
return true;
}
+static void __init sev_es_alloc_runtime_data(int cpu)
+{
+ struct sev_es_runtime_data *data;
+
+ data = memblock_alloc(sizeof(*data), PAGE_SIZE);
+ if (!data)
+ panic("Can't allocate SEV-ES runtime data");
+
+ per_cpu(runtime_data, cpu) = data;
+}
+
+static void __init sev_es_init_ghcb(int cpu)
+{
+ struct sev_es_runtime_data *data;
+ int err;
+
+ data = per_cpu(runtime_data, cpu);
+
+ err = early_set_memory_decrypted((unsigned long)&data->ghcb_page,
+ sizeof(data->ghcb_page));
+ if (err)
+ panic("Can not map GHCBs unencrypted");
+
+ memset(&data->ghcb_page, 0, sizeof(data->ghcb_page));
+}
+
+void __init sev_es_init_vc_handling(void)
+{
+ int cpu;
+
+ BUILD_BUG_ON((offsetof(struct sev_es_runtime_data, ghcb_page) % PAGE_SIZE) !=
0);
+
+ if (!sev_es_active())
+ return;
+
+ /* Initialize per-cpu GHCB pages */
+ for_each_possible_cpu(cpu) {
+ sev_es_alloc_runtime_data(cpu);
+ sev_es_init_ghcb(cpu);
+ }
+}
+
static void __init vc_early_vc_forward_exception(struct es_em_ctxt *ctxt)
{
int trapnr = ctxt->fi.vector;
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index d54cffdc7cac..411928c38cd7 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -965,6 +965,9 @@ void __init trap_init(void)
/* Init cpu_entry_area before IST entries are set up */
setup_cpu_entry_areas();
+ /* Init GHCB memory pages when running as an SEV-ES guest */
+ sev_es_init_vc_handling();
+
idt_setup_traps();
/*
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 44/75] x86/sev-es: Allocate and Map IST stacks for #VC handler
From: Joerg Roedel <jroedel at suse.de>
Allocate and map enough stacks for the #VC handler to support sufficient
levels of nesting and the NMI-in-#VC scenario.
Also setup the IST entrys for the #VC handler on all CPUs because #VC
needs to work before cpu_init() has set up the per-cpu TSS.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/cpu_entry_area.h | 61 +++++++++++++++++++++++++++
arch/x86/include/asm/page_64_types.h | 1 +
arch/x86/kernel/cpu/common.c | 1 +
arch/x86/kernel/sev-es.c | 40 ++++++++++++++++++
4 files changed, 103 insertions(+)
diff --git a/arch/x86/include/asm/cpu_entry_area.h
b/arch/x86/include/asm/cpu_entry_area.h
index 02c0078d3787..85aac6c63653 100644
--- a/arch/x86/include/asm/cpu_entry_area.h
+++ b/arch/x86/include/asm/cpu_entry_area.h
@@ -64,6 +64,61 @@ enum exception_stack_ordering {
#define CEA_ESTACK_PAGES \
(sizeof(struct cea_exception_stacks) / PAGE_SIZE)
+/*
+ * VC Handler IST Stacks
+ *
+ * The IST stacks for the #VC handler are only allocated when SEV-ES is active,
+ * so they are not part of 'struct exception_stacks'.
+ *
+ * The VC handler uses shift_ist so that #VC can be nested. Nesting happens for
+ * example when the #VC handler has to call printk in the case of and error or
+ * when emulating 'movs' instructions.
+ *
+ * NMIs are another special case which can cause nesting of #VC handlers. The
+ * do_nmi() code path can cause #VC, e.g. for RDPMC. An NMI can also hit in
+ * the time window when the #VC handler is raised but before it has shifted its
+ * IST entry. To make sure any #VC raised from the NMI code path uses a new
+ * stack, the NMI handler unconditionally shifts the #VC handlers IST entry.
+ * This can cause one IST stack for #VC to be omitted.
+ *
+ * To support sufficient levels of nesting for the #VC handler, make the number
+ * of nesting levels configurable. It is currently set to 5 to support this
+ * scenario:
+ *
+ * #VC - IST stack 4, IST entry already shifted to 3
+ *
+ * -> NMI - shifts #VC IST entry to 2
+ *
+ * -> #VC(RDPMC) - shifts #VC IST to 1, something goes wrong, print
+ * an error message
+ *
+ * -> #VC(printk) - shifts #VC IST entry to 0, output driver
+ * uses 'movs'
+ *
+ * -> #VC(movs) - shifts IST to unmapped stack, further #VCs will
+ * cause #DF
+ *
+ */
+#define N_VC_STACKS 5
+
+#define VC_STACK_MEMBERS(guardsize, holesize) \
+ char hole[holesize]; \
+ struct { \
+ char guard[guardsize]; \
+ char stack[EXCEPTION_STKSZ]; \
+ } stacks[N_VC_STACKS]; \
+ char top_guard[guardsize]; \
+
+/* Physical storage */
+struct vmm_exception_stacks {
+ VC_STACK_MEMBERS(0, 0)
+};
+
+/* Mapping in cpu_entry_area */
+struct cea_vmm_exception_stacks {
+ VC_STACK_MEMBERS(PAGE_SIZE, EXCEPTION_STKSZ)
+};
+
#endif
#ifdef CONFIG_X86_32
@@ -110,6 +165,12 @@ struct cpu_entry_area {
* Exception stacks used for IST entries with guard pages.
*/
struct cea_exception_stacks estacks;
+
+ /*
+ * IST Exception stacks for VC handler - Only allocated and mapped when
+ * SEV-ES is active.
+ */
+ struct cea_vmm_exception_stacks vc_stacks;
#endif
/*
* Per CPU debug store for Intel performance monitoring. Wastes a
diff --git a/arch/x86/include/asm/page_64_types.h
b/arch/x86/include/asm/page_64_types.h
index 288b065955b7..d0c6c10c18a0 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -28,6 +28,7 @@
#define IST_INDEX_NMI 1
#define IST_INDEX_DB 2
#define IST_INDEX_MCE 3
+#define IST_INDEX_VC 4
/*
* Set __PAGE_OFFSET to the most negative possible address +
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index bed0cb83fe24..214765635e86 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1808,6 +1808,7 @@ static inline void tss_setup_ist(struct tss_struct *tss)
tss->x86_tss.ist[IST_INDEX_NMI] = __this_cpu_ist_top_va(NMI);
tss->x86_tss.ist[IST_INDEX_DB] = __this_cpu_ist_top_va(DB);
tss->x86_tss.ist[IST_INDEX_MCE] = __this_cpu_ist_top_va(MCE);
+ /* IST_INDEX_VC already set up for all CPUs during early boot */
}
#else /* CONFIG_X86_64 */
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index a43d80d5e50e..e5d87f2af357 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <asm/cpu_entry_area.h>
#include <asm/trap_defs.h>
#include <asm/sev-es.h>
#include <asm/insn-eval.h>
@@ -37,6 +38,9 @@ static struct ghcb __initdata *boot_ghcb;
/* #VC handler runtime per-cpu data */
struct sev_es_runtime_data {
struct ghcb ghcb_page;
+
+ /* Physical storage for the per-cpu IST stacks of the #VC handler */
+ struct vmm_exception_stacks vc_stacks __aligned(PAGE_SIZE);
};
static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
@@ -236,11 +240,46 @@ static void __init sev_es_init_ghcb(int cpu)
memset(&data->ghcb_page, 0, sizeof(data->ghcb_page));
}
+static void __init sev_es_setup_vc_stack(int cpu)
+{
+ struct vmm_exception_stacks *stack;
+ struct sev_es_runtime_data *data;
+ struct cpu_entry_area *cea;
+ struct tss_struct *tss;
+ unsigned long size;
+ char *first_stack;
+ int i;
+
+ data = per_cpu(runtime_data, cpu);
+ stack = &data->vc_stacks;
+ cea = get_cpu_entry_area(cpu);
+
+ /* Map the stacks to the cpu_entry_area */
+ for (i = 0; i < N_VC_STACKS; i++) {
+ void *vaddr = cea->vc_stacks.stacks[i].stack;
+ phys_addr_t pa = __pa(stack->stacks[i].stack);
+
+ cea_set_pte(vaddr, pa, PAGE_KERNEL);
+ }
+
+ /*
+ * The #VC handler IST stack is needed in secondary CPU bringup before
+ * cpu_init() had a chance to setup the rest of the TSS. So setup the
+ * #VC handlers stack pointer up here for all CPUs
+ */
+ first_stack = cea->vc_stacks.stacks[N_VC_STACKS - 1].stack;
+ size = sizeof(cea->vc_stacks.stacks[N_VC_STACKS - 1].stack);
+ tss = per_cpu_ptr(&cpu_tss_rw, cpu);
+
+ tss->x86_tss.ist[IST_INDEX_VC] = (unsigned long)first_stack + size;
+}
+
void __init sev_es_init_vc_handling(void)
{
int cpu;
BUILD_BUG_ON((offsetof(struct sev_es_runtime_data, ghcb_page) % PAGE_SIZE) !=
0);
+ BUILD_BUG_ON((offsetof(struct sev_es_runtime_data, vc_stacks) % PAGE_SIZE) !=
0);
if (!sev_es_active())
return;
@@ -249,6 +288,7 @@ void __init sev_es_init_vc_handling(void)
for_each_possible_cpu(cpu) {
sev_es_alloc_runtime_data(cpu);
sev_es_init_ghcb(cpu);
+ sev_es_setup_vc_stack(cpu);
}
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 45/75] x86/dumpstack/64: Handle #VC exception stacks
From: Joerg Roedel <jroedel at suse.de>
Make the stack unwinder aware of the IST stacks for the #VC exception
handler.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/cpu_entry_area.h | 1 +
arch/x86/include/asm/sev-es.h | 13 ++++++++
arch/x86/include/asm/stacktrace.h | 4 +++
arch/x86/kernel/dumpstack_64.c | 47 +++++++++++++++++++++++++++
arch/x86/kernel/sev-es.c | 26 +++++++++++++++
5 files changed, 91 insertions(+)
diff --git a/arch/x86/include/asm/cpu_entry_area.h
b/arch/x86/include/asm/cpu_entry_area.h
index 85aac6c63653..e4216caad01a 100644
--- a/arch/x86/include/asm/cpu_entry_area.h
+++ b/arch/x86/include/asm/cpu_entry_area.h
@@ -192,6 +192,7 @@ struct cpu_entry_area {
DECLARE_PER_CPU(struct cpu_entry_area *, cpu_entry_area);
DECLARE_PER_CPU(struct cea_exception_stacks *, cea_exception_stacks);
+DECLARE_PER_CPU(struct cea_vmm_exception_stacks *, cea_vmm_exception_stacks);
extern void setup_cpu_entry_areas(void);
extern void cea_set_pte(void *cea_vaddr, phys_addr_t pa, pgprot_t flags);
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index e1ed963a57ec..265da8351475 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -9,6 +9,8 @@
#define __ASM_ENCRYPTED_STATE_H
#include <linux/types.h>
+
+#include <asm/stacktrace.h>
#include <asm/insn.h>
#define GHCB_SEV_INFO 0x001UL
@@ -76,4 +78,15 @@ static inline u64 lower_bits(u64 val, unsigned int bits)
extern void vc_no_ghcb(void);
extern bool vc_boot_ghcb(struct pt_regs *regs);
+enum stack_type;
+
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+const char *vc_stack_name(enum stack_type type);
+#else /* CONFIG_AMD_MEM_ENCRYPT */
+static inline const char *vc_stack_name(enum stack_type type)
+{
+ return NULL;
+}
+#endif /* CONFIG_AMD_MEM_ENCRYPT*/
+
#endif
diff --git a/arch/x86/include/asm/stacktrace.h
b/arch/x86/include/asm/stacktrace.h
index 14db05086bbf..2f3534ef4b5f 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -21,6 +21,10 @@ enum stack_type {
STACK_TYPE_ENTRY,
STACK_TYPE_EXCEPTION,
STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1,
+#ifdef CONFIG_X86_64
+ STACK_TYPE_VC,
+ STACK_TYPE_VC_LAST = STACK_TYPE_VC + N_VC_STACKS - 1,
+#endif
};
struct stack_info {
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 87b97897a881..2468963c1424 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -18,6 +18,7 @@
#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>
+#include <asm/sev-es.h>
static const char * const exception_stack_names[] = {
[ ESTACK_DF ] = "#DF",
@@ -47,6 +48,9 @@ const char *stack_type_name(enum stack_type type)
if (type >= STACK_TYPE_EXCEPTION && type <=
STACK_TYPE_EXCEPTION_LAST)
return exception_stack_names[type - STACK_TYPE_EXCEPTION];
+ if (type >= STACK_TYPE_VC && type <= STACK_TYPE_VC_LAST)
+ return vc_stack_name(type);
+
return NULL;
}
@@ -84,6 +88,46 @@ struct estack_pages estack_pages[CEA_ESTACK_PAGES]
____cacheline_aligned = {
EPAGERANGE(MCE),
};
+static bool in_vc_exception_stack(unsigned long *stack, struct stack_info
*info)
+{
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ unsigned long begin, end, stk = (unsigned long)stack;
+ struct cea_vmm_exception_stacks *vc_stacks;
+ struct pt_regs *regs;
+ enum stack_type type;
+ int i;
+
+ vc_stacks = __this_cpu_read(cea_vmm_exception_stacks);
+
+ /* Already initialized? */
+ if (!vc_stacks)
+ return false;
+
+ for (i = 0; i < N_VC_STACKS; i++) {
+ type = STACK_TYPE_VC_LAST - i;
+ begin = (unsigned long)vc_stacks->stacks[i].stack;
+ end = begin + sizeof(vc_stacks->stacks[i].stack);
+
+ if (stk >= begin && stk < end)
+ goto found;
+ }
+
+ return false;
+
+found:
+
+ regs = (struct pt_regs *)end - 1;
+ info->type = type;
+ info->begin = (unsigned long *)begin;
+ info->end = (unsigned long *)end;
+ info->next_sp = (unsigned long *)regs->sp;
+
+ return true;
+#else
+ return false;
+#endif
+}
+
static bool in_exception_stack(unsigned long *stack, struct stack_info *info)
{
unsigned long begin, end, stk = (unsigned long)stack;
@@ -173,6 +217,9 @@ int get_stack_info(unsigned long *stack, struct task_struct
*task,
if (in_entry_stack(stack, info))
goto recursion_check;
+ if (in_vc_exception_stack(stack, info))
+ goto recursion_check;
+
goto unknown;
recursion_check:
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index e5d87f2af357..dd60d24db3d0 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <asm/cpu_entry_area.h>
+#include <asm/stacktrace.h>
#include <asm/trap_defs.h>
#include <asm/sev-es.h>
#include <asm/insn-eval.h>
@@ -34,6 +35,9 @@ static struct ghcb boot_ghcb_page __bss_decrypted
__aligned(PAGE_SIZE);
* cleared
*/
static struct ghcb __initdata *boot_ghcb;
+DEFINE_PER_CPU(struct cea_vmm_exception_stacks *, cea_vmm_exception_stacks);
+
+static char vc_stack_names[N_VC_STACKS][8];
/* #VC handler runtime per-cpu data */
struct sev_es_runtime_data {
@@ -240,6 +244,16 @@ static void __init sev_es_init_ghcb(int cpu)
memset(&data->ghcb_page, 0, sizeof(data->ghcb_page));
}
+static void __init init_vc_stack_names(void)
+{
+ int i;
+
+ for (i = 0; i < N_VC_STACKS; i++) {
+ snprintf(vc_stack_names[i], sizeof(vc_stack_names[i]),
+ "#VC%d", i);
+ }
+}
+
static void __init sev_es_setup_vc_stack(int cpu)
{
struct vmm_exception_stacks *stack;
@@ -272,6 +286,8 @@ static void __init sev_es_setup_vc_stack(int cpu)
tss = per_cpu_ptr(&cpu_tss_rw, cpu);
tss->x86_tss.ist[IST_INDEX_VC] = (unsigned long)first_stack + size;
+
+ per_cpu(cea_vmm_exception_stacks, cpu) = &cea->vc_stacks;
}
void __init sev_es_init_vc_handling(void)
@@ -290,6 +306,16 @@ void __init sev_es_init_vc_handling(void)
sev_es_init_ghcb(cpu);
sev_es_setup_vc_stack(cpu);
}
+
+ init_vc_stack_names();
+}
+
+const char *vc_stack_name(enum stack_type type)
+{
+ if (type < STACK_TYPE_VC || type > STACK_TYPE_VC_LAST)
+ return NULL;
+
+ return vc_stack_names[type - STACK_TYPE_VC];
}
static void __init vc_early_vc_forward_exception(struct es_em_ctxt *ctxt)
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 46/75] x86/sev-es: Shift #VC IST Stack in nmi_enter()/nmi_exit()
From: Joerg Roedel <jroedel at suse.de>
When an NMI hits in the #VC handler entry code before it shifted its IST
entry, then any subsequent #VC exception in the NMI code-path will
overwrite the interrupted #VC handlers stack.
Make sure this doesn't happen by explicitly shifting the #VC IST entry
in the NMI handler for the time in can cause #VC exceptions.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/hardirq.h | 14 ++++++++++++++
arch/x86/include/asm/sev-es.h | 2 ++
arch/x86/kernel/asm-offsets_64.c | 1 +
arch/x86/kernel/nmi.c | 1 +
arch/x86/kernel/sev-es.c | 21 +++++++++++++++++++++
5 files changed, 39 insertions(+)
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index 07533795b8d2..4920556dcbf8 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -80,4 +80,18 @@ static inline bool kvm_get_cpu_l1tf_flush_l1d(void)
static inline void kvm_set_cpu_l1tf_flush_l1d(void) { }
#endif /* IS_ENABLED(CONFIG_KVM_INTEL) */
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+
+#define arch_nmi_enter() \
+ do { \
+ sev_es_nmi_enter(); \
+ } while (0)
+
+#define arch_nmi_exit() \
+ do { \
+ sev_es_nmi_exit(); \
+ } while (0)
+
+#endif
+
#endif /* _ASM_X86_HARDIRQ_H */
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index 265da8351475..ca0e12cb089c 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -82,6 +82,8 @@ enum stack_type;
#ifdef CONFIG_AMD_MEM_ENCRYPT
const char *vc_stack_name(enum stack_type type);
+void sev_es_nmi_enter(void);
+void sev_es_nmi_exit(void);
#else /* CONFIG_AMD_MEM_ENCRYPT */
static inline const char *vc_stack_name(enum stack_type type)
{
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index c2a47016f243..b8b57faed147 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -60,6 +60,7 @@ int main(void)
OFFSET(TSS_ist, tss_struct, x86_tss.ist);
DEFINE(DB_STACK_OFFSET, offsetof(struct cea_exception_stacks, DB_stack) -
offsetof(struct cea_exception_stacks, DB1_stack));
+ DEFINE(VC_STACK_OFFSET, sizeof(((struct cea_vmm_exception_stacks
*)0)->stacks[0]));
BLANK();
#ifdef CONFIG_STACKPROTECTOR
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 6407ea21fa1b..27d1016ec840 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -37,6 +37,7 @@
#include <asm/reboot.h>
#include <asm/cache.h>
#include <asm/nospec-branch.h>
+#include <asm/sev-es.h>
#define CREATE_TRACE_POINTS
#include <trace/events/nmi.h>
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index dd60d24db3d0..a4fa7f351bf2 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <generated/asm-offsets.h>
#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>
#include <asm/trap_defs.h>
@@ -49,6 +50,26 @@ struct sev_es_runtime_data {
static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
+/*
+ * Shift/Unshift the IST entry for the #VC handler during
+ * nmi_enter()/nmi_exit(). This is needed when an NMI hits in the #VC handlers
+ * entry code before it has shifted its IST entry. This way #VC exceptions
+ * caused by the NMI handler are guaranteed to use a new stack.
+ */
+void sev_es_nmi_enter(void)
+{
+ struct tss_struct *tss = this_cpu_ptr(&cpu_tss_rw);
+
+ tss->x86_tss.ist[IST_INDEX_VC] -= VC_STACK_OFFSET;
+}
+
+void sev_es_nmi_exit(void)
+{
+ struct tss_struct *tss = this_cpu_ptr(&cpu_tss_rw);
+
+ tss->x86_tss.ist[IST_INDEX_VC] += VC_STACK_OFFSET;
+}
+
/* Needed in vc_early_vc_forward_exception */
void do_early_exception(struct pt_regs *regs, int trapnr);
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 47/75] x86/sev-es: Add Runtime #VC Exception Handler
From: Tom Lendacky <thomas.lendacky at amd.com>
Add the handler for #VC exceptions invoked at runtime.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/entry/entry_64.S | 4 +
arch/x86/include/asm/traps.h | 7 ++
arch/x86/kernel/idt.c | 4 +-
arch/x86/kernel/sev-es.c | 167 ++++++++++++++++++++++++++++++++++-
4 files changed, 180 insertions(+), 2 deletions(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 0e9504fabe52..4c392eb2f063 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1210,6 +1210,10 @@ idtentry async_page_fault do_async_page_fault
has_error_code=1 read_cr2=1
idtentry machine_check do_mce has_error_code=0 paranoid=1
#endif
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+idtentry vmm_communication do_vmm_communication has_error_code=1 paranoid=1
shift_ist=IST_INDEX_VC ist_offset=VC_STACK_OFFSET
+#endif
+
/*
* Save all registers in pt_regs, and switch gs if needed.
* Use slow, but surefire "are we in kernel?" check.
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 104991c05425..37f6e86ac53a 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -35,6 +35,9 @@ asmlinkage void alignment_check(void);
#ifdef CONFIG_X86_MCE
asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+asmlinkage void vmm_communication(void);
+#endif
asmlinkage void simd_coprocessor_error(void);
#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
@@ -83,6 +86,10 @@ dotraplinkage void do_spurious_interrupt_bug(struct pt_regs
*regs, long error_co
dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code);
dotraplinkage void do_alignment_check(struct pt_regs *regs, long error_code);
dotraplinkage void do_simd_coprocessor_error(struct pt_regs *regs, long
error_code);
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+dotraplinkage void do_vmm_communication_error(struct pt_regs *regs,
+ long error_code);
+#endif
#ifdef CONFIG_X86_32
dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code);
#endif
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 135d208a2d38..e32cc5f3fa94 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -88,7 +88,6 @@ static const __initconst struct idt_data def_idts[] = {
#ifdef CONFIG_X86_MCE
INTG(X86_TRAP_MC, &machine_check),
#endif
-
SYSG(X86_TRAP_OF, overflow),
#if defined(CONFIG_IA32_EMULATION)
SYSG(IA32_SYSCALL_VECTOR, entry_INT80_compat),
@@ -185,6 +184,9 @@ static const __initconst struct idt_data ist_idts[] = {
#ifdef CONFIG_X86_MCE
ISTG(X86_TRAP_MC, &machine_check, IST_INDEX_MCE),
#endif
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ ISTG(X86_TRAP_VC, vmm_communication, IST_INDEX_VC),
+#endif
};
/*
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index a4fa7f351bf2..bc3a58427028 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -10,6 +10,7 @@
#include <linux/sched/debug.h> /* For show_regs() */
#include <linux/percpu-defs.h>
#include <linux/mem_encrypt.h>
+#include <linux/lockdep.h>
#include <linux/printk.h>
#include <linux/mm_types.h>
#include <linux/set_memory.h>
@@ -25,7 +26,7 @@
#include <asm/insn-eval.h>
#include <asm/fpu/internal.h>
#include <asm/processor.h>
-#include <asm/trap_defs.h>
+#include <asm/traps.h>
#include <asm/svm.h>
/* For early boot hypervisor communication in SEV-ES enabled guests */
@@ -46,10 +47,26 @@ struct sev_es_runtime_data {
/* Physical storage for the per-cpu IST stacks of the #VC handler */
struct vmm_exception_stacks vc_stacks __aligned(PAGE_SIZE);
+
+ /* Reserve on page per CPU as backup storage for the unencrypted GHCB */
+ struct ghcb backup_ghcb;
+
+ /*
+ * Mark the per-cpu GHCBs as in-use to detect nested #VC exceptions.
+ * There is no need for it to be atomic, because nothing is written to
+ * the GHCB between the read and the write of ghcb_active. So it is safe
+ * to use it when a nested #VC exception happens before the write.
+ */
+ bool ghcb_active;
+ bool backup_ghcb_active;
};
static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
+struct ghcb_state {
+ struct ghcb *ghcb;
+};
+
/*
* Shift/Unshift the IST entry for the #VC handler during
* nmi_enter()/nmi_exit(). This is needed when an NMI hits in the #VC handlers
@@ -70,6 +87,53 @@ void sev_es_nmi_exit(void)
tss->x86_tss.ist[IST_INDEX_VC] += VC_STACK_OFFSET;
}
+static struct ghcb *sev_es_get_ghcb(struct ghcb_state *state)
+{
+ struct sev_es_runtime_data *data;
+ struct ghcb *ghcb;
+
+ data = this_cpu_read(runtime_data);
+ ghcb = &data->ghcb_page;
+
+ if (unlikely(data->ghcb_active)) {
+ /* GHCB is already in use - save its contents */
+
+ if (unlikely(data->backup_ghcb_active))
+ return NULL;
+
+ /* Mark backup_ghcb active before writing to it */
+ data->backup_ghcb_active = true;
+
+ state->ghcb = &data->backup_ghcb;
+
+ /* Backup GHCB content */
+ *state->ghcb = *ghcb;
+ } else {
+ state->ghcb = NULL;
+ data->ghcb_active = true;
+ }
+
+ return ghcb;
+}
+
+static void sev_es_put_ghcb(struct ghcb_state *state)
+{
+ struct sev_es_runtime_data *data;
+ struct ghcb *ghcb;
+
+ data = this_cpu_read(runtime_data);
+ ghcb = &data->ghcb_page;
+
+ if (state->ghcb) {
+ /* Restore GHCB from Backup */
+ *ghcb = *state->ghcb;
+ data->backup_ghcb_active = false;
+ state->ghcb = NULL;
+ } else {
+ data->ghcb_active = false;
+ }
+}
+
/* Needed in vc_early_vc_forward_exception */
void do_early_exception(struct pt_regs *regs, int trapnr);
@@ -263,6 +327,9 @@ static void __init sev_es_init_ghcb(int cpu)
panic("Can not map GHCBs unencrypted");
memset(&data->ghcb_page, 0, sizeof(data->ghcb_page));
+
+ data->ghcb_active = false;
+ data->backup_ghcb_active = false;
}
static void __init init_vc_stack_names(void)
@@ -367,6 +434,104 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
return result;
}
+static void vc_forward_exception(struct es_em_ctxt *ctxt)
+{
+ long error_code = ctxt->fi.error_code;
+ int trapnr = ctxt->fi.vector;
+
+ ctxt->regs->orig_ax = ctxt->fi.error_code;
+
+ switch (trapnr) {
+ case X86_TRAP_GP:
+ do_general_protection(ctxt->regs, error_code);
+ break;
+ case X86_TRAP_UD:
+ do_invalid_op(ctxt->regs, 0);
+ break;
+ default:
+ pr_emerg("ERROR: Unsupported exception in #VC instruction emulation -
can't continue\n");
+ BUG();
+ }
+}
+
+dotraplinkage void do_vmm_communication(struct pt_regs *regs,
+ unsigned long exit_code)
+{
+ struct sev_es_runtime_data *data = this_cpu_read(runtime_data);
+ struct ghcb_state state;
+ struct es_em_ctxt ctxt;
+ enum es_result result;
+ struct ghcb *ghcb;
+
+ lockdep_assert_irqs_disabled();
+
+ /*
+ * This is invoked through an interrupt gate, so IRQs are disabled. The
+ * code below might walk page-tables for user or kernel addresses, so
+ * keep the IRQs disabled to protect us against concurrent TLB flushes.
+ */
+
+ ghcb = sev_es_get_ghcb(&state);
+ if (!ghcb) {
+ /*
+ * Mark GHCBs inactive so that panic() is able to print the
+ * message.
+ */
+ data->ghcb_active = false;
+ data->backup_ghcb_active = false;
+
+ panic("Unable to handle #VC exception! GHCB and Backup GHCB are already
in use");
+ }
+
+ vc_ghcb_invalidate(ghcb);
+ result = vc_init_em_ctxt(&ctxt, regs, exit_code);
+
+ if (result == ES_OK)
+ result = vc_handle_exitcode(&ctxt, ghcb, exit_code);
+
+ sev_es_put_ghcb(&state);
+
+ /* Done - now check the result */
+ switch (result) {
+ case ES_OK:
+ vc_finish_insn(&ctxt);
+ break;
+ case ES_UNSUPPORTED:
+ pr_emerg("PANIC: Unsupported exit-code 0x%02lx in early #VC exception
(IP: 0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_VMM_ERROR:
+ pr_emerg("PANIC: Failure in communication with VMM (exit-code 0x%02lx
IP: 0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_DECODE_FAILED:
+ pr_emerg("PANIC: Failed to decode instruction (exit-code 0x%02lx IP:
0x%lx)\n",
+ exit_code, regs->ip);
+ goto fail;
+ case ES_EXCEPTION:
+ vc_forward_exception(&ctxt);
+ break;
+ case ES_RETRY:
+ /* Nothing to do */
+ break;
+ default:
+ pr_emerg("PANIC: Unknown result in %s():%d\n", __func__, result);
+ /*
+ * Emulating the instruction which caused the #VC exception
+ * failed - can't continue so print debug information
+ */
+ BUG();
+ }
+
+ return;
+
+fail:
+ show_regs(regs);
+
+ while (true)
+ halt();
+}
+
bool __init vc_boot_ghcb(struct pt_regs *regs)
{
unsigned long exit_code = regs->orig_ax;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 48/75] x86/sev-es: Wire up existing #VC exit-code handlers
From: Joerg Roedel <jroedel at suse.de>
Re-use the handlers for CPUID and IOIO caused #VC exceptions in the
early boot handler.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es-shared.c | 7 +++----
arch/x86/kernel/sev-es.c | 6 ++++++
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 3d2299fb5e3f..3d645662ff10 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -324,8 +324,7 @@ static enum es_result vc_ioio_exitinfo(struct es_em_ctxt
*ctxt, u64 *exitinfo)
return ES_OK;
}
-static enum es_result __maybe_unused
-vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
+static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt
*ctxt)
{
struct pt_regs *regs = ctxt->regs;
u64 exit_info_1, exit_info_2;
@@ -421,8 +420,8 @@ vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
return ret;
}
-static enum es_result __maybe_unused vc_handle_cpuid(struct ghcb *ghcb,
- struct es_em_ctxt *ctxt)
+static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
u32 cr4 = native_read_cr4();
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index bc3a58427028..85027fb4177e 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -424,6 +424,12 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
enum es_result result;
switch (exit_code) {
+ case SVM_EXIT_CPUID:
+ result = vc_handle_cpuid(ghcb, ctxt);
+ break;
+ case SVM_EXIT_IOIO:
+ result = vc_handle_ioio(ghcb, ctxt);
+ break;
default:
/*
* Unexpected #VC exception
--
2.17.1
Joerg Roedel
2020-Apr-28 15:16 UTC
[PATCH v3 49/75] x86/sev-es: Handle instruction fetches from user-space
From: Joerg Roedel <jroedel at suse.de>
When a #VC exception is triggered by user-space the instruction decoder
needs to read the instruction bytes from user addresses. Enhance
vc_decode_insn() to safely fetch kernel and user instructions.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 31 ++++++++++++++++++++++---------
1 file changed, 22 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 85027fb4177e..c2223c2a28c2 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -165,17 +165,30 @@ static enum es_result vc_decode_insn(struct es_em_ctxt
*ctxt)
enum es_result ret;
int res;
- res = vc_fetch_insn_kernel(ctxt, buffer);
- if (unlikely(res == -EFAULT)) {
- ctxt->fi.vector = X86_TRAP_PF;
- ctxt->fi.error_code = 0;
- ctxt->fi.cr2 = ctxt->regs->ip;
- return ES_EXCEPTION;
+ if (!user_mode(ctxt->regs)) {
+ res = vc_fetch_insn_kernel(ctxt, buffer);
+ if (unlikely(res == -EFAULT)) {
+ ctxt->fi.vector = X86_TRAP_PF;
+ ctxt->fi.error_code = 0;
+ ctxt->fi.cr2 = ctxt->regs->ip;
+ return ES_EXCEPTION;
+ }
+
+ insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE - res, 1);
+ insn_get_length(&ctxt->insn);
+ } else {
+ res = insn_fetch_from_user(ctxt->regs, buffer);
+ if (res == 0) {
+ ctxt->fi.vector = X86_TRAP_PF;
+ ctxt->fi.cr2 = ctxt->regs->ip;
+ ctxt->fi.error_code = X86_PF_INSTR | X86_PF_USER;
+ return ES_EXCEPTION;
+ }
+
+ if (!insn_decode(ctxt->regs, &ctxt->insn, buffer, res))
+ return ES_DECODE_FAILED;
}
- insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE - res, 1);
- insn_get_length(&ctxt->insn);
-
ret = ctxt->insn.immediate.got ? ES_OK : ES_DECODE_FAILED;
return ret;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 50/75] x86/sev-es: Do not crash on #VC exceptions from user-space
From: Joerg Roedel <jroedel at suse.de>
Send SIGBUS to the user-space process that caused the #VC exception
instead of killing the machine. Also ratelimit the error messages so
that user-space can't flood the kernel log and add a prefix the the
messages printed for SEV-ES.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 40 +++++++++++++++++++++++++++++-----------
1 file changed, 29 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index c2223c2a28c2..f4ce3b475464 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -7,6 +7,8 @@
* Author: Joerg Roedel <jroedel at suse.de>
*/
+#define pr_fmt(fmt) "SEV-ES: " fmt
+
#include <linux/sched/debug.h> /* For show_regs() */
#include <linux/percpu-defs.h>
#include <linux/mem_encrypt.h>
@@ -468,7 +470,7 @@ static void vc_forward_exception(struct es_em_ctxt *ctxt)
do_invalid_op(ctxt->regs, 0);
break;
default:
- pr_emerg("ERROR: Unsupported exception in #VC instruction emulation -
can't continue\n");
+ pr_emerg("Unsupported exception in #VC instruction emulation - can't
continue\n");
BUG();
}
}
@@ -516,16 +518,16 @@ dotraplinkage void do_vmm_communication(struct pt_regs
*regs,
vc_finish_insn(&ctxt);
break;
case ES_UNSUPPORTED:
- pr_emerg("PANIC: Unsupported exit-code 0x%02lx in early #VC exception
(IP: 0x%lx)\n",
- exit_code, regs->ip);
+ pr_err_ratelimited("Unsupported exit-code 0x%02lx in early #VC exception
(IP: 0x%lx)\n",
+ exit_code, regs->ip);
goto fail;
case ES_VMM_ERROR:
- pr_emerg("PANIC: Failure in communication with VMM (exit-code 0x%02lx
IP: 0x%lx)\n",
- exit_code, regs->ip);
+ pr_err_ratelimited("Failure in communication with VMM (exit-code 0x%02lx
IP: 0x%lx)\n",
+ exit_code, regs->ip);
goto fail;
case ES_DECODE_FAILED:
- pr_emerg("PANIC: Failed to decode instruction (exit-code 0x%02lx IP:
0x%lx)\n",
- exit_code, regs->ip);
+ pr_err_ratelimited("Failed to decode instruction (exit-code 0x%02lx IP:
0x%lx)\n",
+ exit_code, regs->ip);
goto fail;
case ES_EXCEPTION:
vc_forward_exception(&ctxt);
@@ -534,7 +536,7 @@ dotraplinkage void do_vmm_communication(struct pt_regs
*regs,
/* Nothing to do */
break;
default:
- pr_emerg("PANIC: Unknown result in %s():%d\n", __func__, result);
+ pr_emerg("Unknown result in %s():%d\n", __func__, result);
/*
* Emulating the instruction which caused the #VC exception
* failed - can't continue so print debug information
@@ -545,10 +547,26 @@ dotraplinkage void do_vmm_communication(struct pt_regs
*regs,
return;
fail:
- show_regs(regs);
+ if (user_mode(regs)) {
+ /*
+ * Do not kill the machine if user-space triggered the
+ * exception. Send SIGBUS instead and let user-space deal with
+ * it.
+ */
+ force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)0);
+ } else {
+ pr_emerg("PANIC: Unhandled #VC exception in kernel space
(result=%d)\n",
+ result);
- while (true)
- halt();
+ /* Show some debug info */
+ show_regs(regs);
+
+ /* Ask hypervisor to sev_es_terminate */
+ sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
+
+ /* If that fails and we get here - just panic */
+ panic("Returned from Terminate-Request to Hypervisor\n");
+ }
}
bool __init vc_boot_ghcb(struct pt_regs *regs)
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Add handler for VC exceptions caused by MMIO intercepts. These
intercepts come along as nested page faults on pages with reserved
bits set.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/uapi/asm/svm.h | 5 +
arch/x86/kernel/sev-es.c | 188 ++++++++++++++++++++++++++++++++
2 files changed, 193 insertions(+)
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
index c68d1618c9b0..8f36ae021a7f 100644
--- a/arch/x86/include/uapi/asm/svm.h
+++ b/arch/x86/include/uapi/asm/svm.h
@@ -81,6 +81,11 @@
#define SVM_EXIT_AVIC_INCOMPLETE_IPI 0x401
#define SVM_EXIT_AVIC_UNACCELERATED_ACCESS 0x402
+/* SEV-ES software-defined VMGEXIT events */
+#define SVM_VMGEXIT_MMIO_READ 0x80000001
+#define SVM_VMGEXIT_MMIO_WRITE 0x80000002
+#define SVM_VMGEXIT_UNSUPPORTED_EVENT 0x8000ffff
+
#define SVM_EXIT_ERR -1
#define SVM_EXIT_REASONS \
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index f4ce3b475464..e3662723ed76 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -294,6 +294,25 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
return ES_EXCEPTION;
}
+static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb, unsigned long vaddr)
+{
+ unsigned long va = (unsigned long)vaddr;
+ unsigned int level;
+ phys_addr_t pa;
+ pgd_t *pgd;
+ pte_t *pte;
+
+ pgd = pgd_offset(current->active_mm, va);
+ pte = lookup_address_in_pgd(pgd, va, &level);
+ if (!pte)
+ return 0;
+
+ pa = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT;
+ pa |= va & ~page_level_mask(level);
+
+ return pa;
+}
+
/* Include code shared with pre-decompression boot stage */
#include "sev-es-shared.c"
@@ -432,6 +451,172 @@ static void __init vc_early_vc_forward_exception(struct
es_em_ctxt *ctxt)
do_early_exception(ctxt->regs, trapnr);
}
+static long *vc_insn_get_reg(struct es_em_ctxt *ctxt)
+{
+ long *reg_array;
+ int offset;
+
+ reg_array = (long *)ctxt->regs;
+ offset = insn_get_modrm_reg_off(&ctxt->insn, ctxt->regs);
+
+ if (offset < 0)
+ return NULL;
+
+ offset /= sizeof(long);
+
+ return reg_array + offset;
+}
+
+static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
+ unsigned int bytes, bool read)
+{
+ u64 exit_code, exit_info_1, exit_info_2;
+ unsigned long ghcb_pa = __pa(ghcb);
+ void __user *ref;
+
+ ref = insn_get_addr_ref(&ctxt->insn, ctxt->regs);
+ if (ref == (void __user *)-1L)
+ return ES_UNSUPPORTED;
+
+ exit_code = read ? SVM_VMGEXIT_MMIO_READ : SVM_VMGEXIT_MMIO_WRITE;
+
+ exit_info_1 = vc_slow_virt_to_phys(ghcb, (unsigned long)ref);
+ exit_info_2 = bytes; /* Can never be greater than 8 */
+
+ ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer);
+
+ return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2);
+}
+
+static enum es_result vc_handle_mmio_twobyte_ops(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ struct insn *insn = &ctxt->insn;
+ unsigned int bytes = 0;
+ enum es_result ret;
+ int sign_byte;
+ long *reg_data;
+
+ switch (insn->opcode.bytes[1]) {
+ /* MMIO Read w/ zero-extension */
+ case 0xb6:
+ bytes = 1;
+ /* Fallthrough */
+ case 0xb7:
+ if (!bytes)
+ bytes = 2;
+
+ ret = vc_do_mmio(ghcb, ctxt, bytes, true);
+ if (ret)
+ break;
+
+ /* Zero extend based on operand size */
+ reg_data = vc_insn_get_reg(ctxt);
+ memset(reg_data, 0, insn->opnd_bytes);
+
+ memcpy(reg_data, ghcb->shared_buffer, bytes);
+ break;
+
+ /* MMIO Read w/ sign-extension */
+ case 0xbe:
+ bytes = 1;
+ /* Fallthrough */
+ case 0xbf:
+ if (!bytes)
+ bytes = 2;
+
+ ret = vc_do_mmio(ghcb, ctxt, bytes, true);
+ if (ret)
+ break;
+
+ /* Sign extend based on operand size */
+ reg_data = vc_insn_get_reg(ctxt);
+ if (bytes == 1) {
+ u8 *val = (u8 *)ghcb->shared_buffer;
+
+ sign_byte = (*val & 0x80) ? 0xff : 0x00;
+ } else {
+ u16 *val = (u16 *)ghcb->shared_buffer;
+
+ sign_byte = (*val & 0x8000) ? 0xff : 0x00;
+ }
+ memset(reg_data, sign_byte, insn->opnd_bytes);
+
+ memcpy(reg_data, ghcb->shared_buffer, bytes);
+ break;
+
+ default:
+ ret = ES_UNSUPPORTED;
+ }
+
+ return ret;
+}
+
+static enum es_result vc_handle_mmio(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ struct insn *insn = &ctxt->insn;
+ unsigned int bytes = 0;
+ enum es_result ret;
+ long *reg_data;
+
+ switch (insn->opcode.bytes[0]) {
+ /* MMIO Write */
+ case 0x88:
+ bytes = 1;
+ /* Fallthrough */
+ case 0x89:
+ if (!bytes)
+ bytes = insn->opnd_bytes;
+
+ reg_data = vc_insn_get_reg(ctxt);
+ memcpy(ghcb->shared_buffer, reg_data, bytes);
+
+ ret = vc_do_mmio(ghcb, ctxt, bytes, false);
+ break;
+
+ case 0xc6:
+ bytes = 1;
+ /* Fallthrough */
+ case 0xc7:
+ if (!bytes)
+ bytes = insn->opnd_bytes;
+
+ memcpy(ghcb->shared_buffer, insn->immediate1.bytes, bytes);
+
+ ret = vc_do_mmio(ghcb, ctxt, bytes, false);
+ break;
+
+ /* MMIO Read */
+ case 0x8a:
+ bytes = 1;
+ /* Fallthrough */
+ case 0x8b:
+ if (!bytes)
+ bytes = insn->opnd_bytes;
+
+ ret = vc_do_mmio(ghcb, ctxt, bytes, true);
+ if (ret)
+ break;
+
+ reg_data = vc_insn_get_reg(ctxt);
+ if (bytes == 4)
+ *reg_data = 0; /* Zero-extend for 32-bit operation */
+
+ memcpy(reg_data, ghcb->shared_buffer, bytes);
+ break;
+
+ /* Two-Byte Opcodes */
+ case 0x0f:
+ ret = vc_handle_mmio_twobyte_ops(ghcb, ctxt);
+ break;
+ default:
+ ret = ES_UNSUPPORTED;
+ }
+
+ return ret;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -445,6 +630,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_IOIO:
result = vc_handle_ioio(ghcb, ctxt);
break;
+ case SVM_EXIT_NPF:
+ result = vc_handle_mmio(ghcb, ctxt);
+ break;
default:
/*
* Unexpected #VC exception
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 52/75] x86/sev-es: Handle MMIO String Instructions
From: Joerg Roedel <jroedel at suse.de>
Add handling for emulation the MOVS instruction on MMIO regions, as done
by the memcpy_toio() and memcpy_fromio() functions.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 78 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index e3662723ed76..84958a82f8e0 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -552,6 +552,74 @@ static enum es_result vc_handle_mmio_twobyte_ops(struct
ghcb *ghcb,
return ret;
}
+/*
+ * The MOVS instruction has two memory operands, which raises the
+ * problem that it is not known whether the access to the source or the
+ * destination caused the #VC exception (and hence whether an MMIO read
+ * or write operation needs to be emulated).
+ *
+ * Instead of playing games with walking page-tables and trying to guess
+ * whether the source or destination is an MMIO range, this code splits
+ * the move into two operations, a read and a write with only one
+ * memory operand. This will cause a nested #VC exception on the MMIO
+ * address which can then be handled.
+ *
+ * This implementation has the benefit that it also supports MOVS where
+ * source _and_ destination are MMIO regions.
+ *
+ * It will slow MOVS on MMIO down a lot, but in SEV-ES guests it is a
+ * rare operation. If it turns out to be a performance problem the split
+ * operations can be moved to memcpy_fromio() and memcpy_toio().
+ */
+static enum es_result vc_handle_mmio_movs(struct es_em_ctxt *ctxt,
+ unsigned int bytes)
+{
+ unsigned long ds_base, es_base;
+ unsigned char *src, *dst;
+ unsigned char buffer[8];
+ enum es_result ret;
+ bool rep;
+ int off;
+
+ ds_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_DS);
+ es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES);
+
+ if (ds_base == -1L || es_base == -1L) {
+ ctxt->fi.vector = X86_TRAP_GP;
+ ctxt->fi.error_code = 0;
+ return ES_EXCEPTION;
+ }
+
+ src = ds_base + (unsigned char *)ctxt->regs->si;
+ dst = es_base + (unsigned char *)ctxt->regs->di;
+
+ ret = vc_read_mem(ctxt, src, buffer, bytes);
+ if (ret != ES_OK)
+ return ret;
+
+ ret = vc_write_mem(ctxt, dst, buffer, bytes);
+ if (ret != ES_OK)
+ return ret;
+
+ if (ctxt->regs->flags & X86_EFLAGS_DF)
+ off = -bytes;
+ else
+ off = bytes;
+
+ ctxt->regs->si += off;
+ ctxt->regs->di += off;
+
+ rep = insn_has_rep_prefix(&ctxt->insn);
+
+ if (rep)
+ ctxt->regs->cx -= 1;
+
+ if (!rep || ctxt->regs->cx == 0)
+ return ES_OK;
+ else
+ return ES_RETRY;
+}
+
static enum es_result vc_handle_mmio(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
{
@@ -606,6 +674,16 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb,
memcpy(reg_data, ghcb->shared_buffer, bytes);
break;
+ /* MOVS instruction */
+ case 0xa4:
+ bytes = 1;
+ /* Fallthrough */
+ case 0xa5:
+ if (!bytes)
+ bytes = insn->opnd_bytes;
+
+ ret = vc_handle_mmio_movs(ctxt, bytes);
+ break;
/* Two-Byte Opcodes */
case 0x0f:
ret = vc_handle_mmio_twobyte_ops(ghcb, ctxt);
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by RDMSR/WRMSR
instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 84958a82f8e0..e43bba4c7d79 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -316,6 +316,31 @@ static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb,
unsigned long vaddr)
/* Include code shared with pre-decompression boot stage */
#include "sev-es-shared.c"
+static enum es_result vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
+{
+ struct pt_regs *regs = ctxt->regs;
+ enum es_result ret;
+ u64 exit_info_1;
+
+ exit_info_1 = (ctxt->insn.opcode.bytes[1] == 0x30) ? 1 : 0;
+
+ ghcb_set_rcx(ghcb, regs->cx);
+ if (exit_info_1) {
+ ghcb_set_rax(ghcb, regs->ax);
+ ghcb_set_rdx(ghcb, regs->dx);
+ exit_info_1 = 1;
+ }
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MSR, exit_info_1, 0);
+
+ if ((ret == ES_OK) && (!exit_info_1)) {
+ regs->ax = ghcb->save.rax;
+ regs->dx = ghcb->save.rdx;
+ }
+
+ return ret;
+}
+
/*
* This function runs on the first #VC exception after the kernel
* switched to virtual addresses.
@@ -708,6 +733,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_IOIO:
result = vc_handle_ioio(ghcb, ctxt);
break;
+ case SVM_EXIT_MSR:
+ result = vc_handle_msr(ghcb, ctxt);
+ break;
case SVM_EXIT_NPF:
result = vc_handle_mmio(ghcb, ctxt);
break;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 54/75] x86/sev-es: Handle DR7 read/write events
From: Tom Lendacky <thomas.lendacky at amd.com>
Add code to handle #VC exceptions on DR7 register reads and writes.
This is needed early because show_regs() reads DR7 to print it out.
Under SEV-ES there is currently no support for saving/restoring the
DRx registers, but software expects to be able to write to the DR7
register. For now, cache the value written to DR7 and return it on
read attempts, but do not touch the real hardware DR7.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Adapt to #VC handling framework
- Support early usage ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 85 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index e43bba4c7d79..6100f8ac61d4 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -31,6 +31,8 @@
#include <asm/traps.h>
#include <asm/svm.h>
+#define DR7_RESET_VALUE 0x400
+
/* For early boot hypervisor communication in SEV-ES enabled guests */
static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE);
@@ -61,6 +63,13 @@ struct sev_es_runtime_data {
*/
bool ghcb_active;
bool backup_ghcb_active;
+
+ /*
+ * Cached DR7 value - write it on DR7 writes and return it on reads.
+ * That value will never make it to the real hardware DR7 as debugging
+ * is currently unsupported in SEV-ES guests.
+ */
+ unsigned long dr7;
};
static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data);
@@ -492,6 +501,21 @@ static long *vc_insn_get_reg(struct es_em_ctxt *ctxt)
return reg_array + offset;
}
+static long *vc_insn_get_rm(struct es_em_ctxt *ctxt)
+{
+ long *reg_array;
+ int offset;
+
+ reg_array = (long *)ctxt->regs;
+ offset = insn_get_modrm_rm_off(&ctxt->insn, ctxt->regs);
+
+ if (offset < 0)
+ return NULL;
+
+ offset /= sizeof(long);
+
+ return reg_array + offset;
+}
static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt,
unsigned int bytes, bool read)
{
@@ -720,6 +744,61 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb,
return ret;
}
+static enum es_result vc_handle_dr7_write(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ struct sev_es_runtime_data *data = this_cpu_read(runtime_data);
+ long val, *reg = vc_insn_get_rm(ctxt);
+ enum es_result ret;
+
+ if (!reg)
+ return ES_DECODE_FAILED;
+
+ val = *reg;
+
+ /* Upper 32 bits must be written as zeroes */
+ if (val >> 32) {
+ ctxt->fi.vector = X86_TRAP_GP;
+ ctxt->fi.error_code = 0;
+ return ES_EXCEPTION;
+ }
+
+ /* Clear out other reservered bits and set bit 10 */
+ val = (val & 0xffff23ffL) | BIT(10);
+
+ /* Early non-zero writes to DR7 are not supported */
+ if (!data && (val & ~DR7_RESET_VALUE))
+ return ES_UNSUPPORTED;
+
+ /* Using a value of 0 for ExitInfo1 means RAX holds the value */
+ ghcb_set_rax(ghcb, val);
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WRITE_DR7, 0, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (data)
+ data->dr7 = val;
+
+ return ES_OK;
+}
+
+static enum es_result vc_handle_dr7_read(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ struct sev_es_runtime_data *data = this_cpu_read(runtime_data);
+ long *reg = vc_insn_get_rm(ctxt);
+
+ if (!reg)
+ return ES_DECODE_FAILED;
+
+ if (data)
+ *reg = data->dr7;
+ else
+ *reg = DR7_RESET_VALUE;
+
+ return ES_OK;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -727,6 +806,12 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
enum es_result result;
switch (exit_code) {
+ case SVM_EXIT_READ_DR7:
+ result = vc_handle_dr7_read(ghcb, ctxt);
+ break;
+ case SVM_EXIT_WRITE_DR7:
+ result = vc_handle_dr7_write(ghcb, ctxt);
+ break;
case SVM_EXIT_CPUID:
result = vc_handle_cpuid(ghcb, ctxt);
break;
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by WBINVD instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 6100f8ac61d4..a8c0d865ca22 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -799,6 +799,12 @@ static enum es_result vc_handle_dr7_read(struct ghcb *ghcb,
return ES_OK;
}
+static enum es_result vc_handle_wbinvd(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WBINVD, 0, 0);
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -821,6 +827,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_MSR:
result = vc_handle_msr(ghcb, ctxt);
break;
+ case SVM_EXIT_WBINVD:
+ result = vc_handle_wbinvd(ghcb, ctxt);
+ break;
case SVM_EXIT_NPF:
result = vc_handle_mmio(ghcb, ctxt);
break;
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by RDTSC and RDTSCP
instructions. Also make it available in the pre-decompression stage
because the KASLR code used RDTSC/RDTSCP to gather entropy and some
hypervisors intercept these instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Adapt to #VC handling infrastructure
- Make it available early ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/sev-es.c | 4 ++++
arch/x86/kernel/sev-es-shared.c | 23 +++++++++++++++++++++++
arch/x86/kernel/sev-es.c | 4 ++++
3 files changed, 31 insertions(+)
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index 05ba1dcdd103..12a5d918d837 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -180,6 +180,10 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long
exit_code)
goto finish;
switch (exit_code) {
+ case SVM_EXIT_RDTSC:
+ case SVM_EXIT_RDTSCP:
+ result = vc_handle_rdtsc(boot_ghcb, &ctxt, exit_code);
+ break;
case SVM_EXIT_IOIO:
result = vc_handle_ioio(boot_ghcb, &ctxt);
break;
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 3d645662ff10..5bfc1f3030d4 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -454,3 +454,26 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
return ES_OK;
}
+
+static enum es_result vc_handle_rdtsc(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt,
+ unsigned long exit_code)
+{
+ bool rdtscp = (exit_code == SVM_EXIT_RDTSCP);
+ enum es_result ret;
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, 0, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (!(ghcb_is_valid_rax(ghcb) && ghcb_is_valid_rdx(ghcb) &&
+ (!rdtscp || ghcb_is_valid_rcx(ghcb))))
+ return ES_VMM_ERROR;
+
+ ctxt->regs->ax = ghcb->save.rax;
+ ctxt->regs->dx = ghcb->save.rdx;
+ if (rdtscp)
+ ctxt->regs->cx = ghcb->save.rcx;
+
+ return ES_OK;
+}
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index a8c0d865ca22..8b2afb9e292d 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -818,6 +818,10 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_WRITE_DR7:
result = vc_handle_dr7_write(ghcb, ctxt);
break;
+ case SVM_EXIT_RDTSC:
+ case SVM_EXIT_RDTSCP:
+ result = vc_handle_rdtsc(ghcb, ctxt, exit_code);
+ break;
case SVM_EXIT_CPUID:
result = vc_handle_cpuid(ghcb, ctxt);
break;
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by RDPMC instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 8b2afb9e292d..eb158781238b 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -805,6 +805,25 @@ static enum es_result vc_handle_wbinvd(struct ghcb *ghcb,
return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WBINVD, 0, 0);
}
+static enum es_result vc_handle_rdpmc(struct ghcb *ghcb, struct es_em_ctxt
*ctxt)
+{
+ enum es_result ret;
+
+ ghcb_set_rcx(ghcb, ctxt->regs->cx);
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_RDPMC, 0, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (!(ghcb_is_valid_rax(ghcb) && ghcb_is_valid_rdx(ghcb)))
+ return ES_VMM_ERROR;
+
+ ctxt->regs->ax = ghcb->save.rax;
+ ctxt->regs->dx = ghcb->save.rdx;
+
+ return ES_OK;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -822,6 +841,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_RDTSCP:
result = vc_handle_rdtsc(ghcb, ctxt, exit_code);
break;
+ case SVM_EXIT_RDPMC:
+ result = vc_handle_rdpmc(ghcb, ctxt);
+ break;
case SVM_EXIT_CPUID:
result = vc_handle_cpuid(ghcb, ctxt);
break;
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by INVD instructions.
Since Linux should never use INVD, just mark it as unsupported.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index eb158781238b..601554e6360f 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -844,6 +844,10 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_RDPMC:
result = vc_handle_rdpmc(ghcb, ctxt);
break;
+ case SVM_EXIT_INVD:
+ pr_err_ratelimited("#VC exception for INVD??? Seriously???\n");
+ result = ES_UNSUPPORTED;
+ break;
case SVM_EXIT_CPUID:
result = vc_handle_cpuid(ghcb, ctxt);
break;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 59/75] x86/sev-es: Handle MONITOR/MONITORX Events
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by MONITOR and MONITORX
instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 601554e6360f..1a961714cd1b 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -824,6 +824,22 @@ static enum es_result vc_handle_rdpmc(struct ghcb *ghcb,
struct es_em_ctxt *ctxt
return ES_OK;
}
+static enum es_result vc_handle_monitor(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ phys_addr_t monitor_pa;
+ pgd_t *pgd;
+
+ pgd = __va(read_cr3_pa());
+ monitor_pa = vc_slow_virt_to_phys(ghcb, ctxt->regs->ax);
+
+ ghcb_set_rax(ghcb, monitor_pa);
+ ghcb_set_rcx(ghcb, ctxt->regs->cx);
+ ghcb_set_rdx(ghcb, ctxt->regs->dx);
+
+ return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0);
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -860,6 +876,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_WBINVD:
result = vc_handle_wbinvd(ghcb, ctxt);
break;
+ case SVM_EXIT_MONITOR:
+ result = vc_handle_monitor(ghcb, ctxt);
+ break;
case SVM_EXIT_NPF:
result = vc_handle_mmio(ghcb, ctxt);
break;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 60/75] x86/sev-es: Handle MWAIT/MWAITX Events
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by MWAIT and MWAITX
instructions.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 1a961714cd1b..d5d4804d1e17 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -840,6 +840,15 @@ static enum es_result vc_handle_monitor(struct ghcb *ghcb,
return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0);
}
+static enum es_result vc_handle_mwait(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ ghcb_set_rax(ghcb, ctxt->regs->ax);
+ ghcb_set_rcx(ghcb, ctxt->regs->cx);
+
+ return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MWAIT, 0, 0);
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -879,6 +888,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_MONITOR:
result = vc_handle_monitor(ghcb, ctxt);
break;
+ case SVM_EXIT_MWAIT:
+ result = vc_handle_mwait(ghcb, ctxt);
+ break;
case SVM_EXIT_NPF:
result = vc_handle_mmio(ghcb, ctxt);
break;
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement a handler for #VC exceptions caused by VMMCALL instructions.
This patch is only a starting point, VMMCALL emulation under SEV-ES
needs further hypervisor-specific changes to provide additional state.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Adapt to #VC handling infrastructure ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index d5d4804d1e17..f807a2adcbe3 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -849,6 +849,26 @@ static enum es_result vc_handle_mwait(struct ghcb *ghcb,
return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MWAIT, 0, 0);
}
+static enum es_result vc_handle_vmmcall(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ enum es_result ret;
+
+ ghcb_set_rax(ghcb, ctxt->regs->ax);
+ ghcb_set_cpl(ghcb, user_mode(ctxt->regs) ? 3 : 0);
+
+ ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_VMMCALL, 0, 0);
+ if (ret != ES_OK)
+ return ret;
+
+ if (!ghcb_is_valid_rax(ghcb))
+ return ES_VMM_ERROR;
+
+ ctxt->regs->ax = ghcb->save.rax;
+
+ return ES_OK;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -882,6 +902,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_MSR:
result = vc_handle_msr(ghcb, ctxt);
break;
+ case SVM_EXIT_VMMCALL:
+ result = vc_handle_vmmcall(ghcb, ctxt);
+ break;
case SVM_EXIT_WBINVD:
result = vc_handle_wbinvd(ghcb, ctxt);
break;
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
Implement a handler for #VC exceptions caused by #AC exceptions. The #AC
exception is just forwarded to do_alignment_check() and not pushed down
to the hypervisor, as requested by the SEV-ES GHCB Standardization
Specification.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index f807a2adcbe3..050a15da9ae5 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -869,6 +869,19 @@ static enum es_result vc_handle_vmmcall(struct ghcb *ghcb,
return ES_OK;
}
+static enum es_result vc_handle_trap_ac(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ /*
+ * Calling do_alignment_check() directly does not work, because it
+ * enables IRQs and the GHCB is active. Forward the exception and call
+ * it later from vc_forward_exception().
+ */
+ ctxt->fi.vector = X86_TRAP_AC;
+ ctxt->fi.error_code = 0;
+ return ES_EXCEPTION;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -882,6 +895,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_WRITE_DR7:
result = vc_handle_dr7_write(ghcb, ctxt);
break;
+ case SVM_EXIT_EXCP_BASE + X86_TRAP_AC:
+ result = vc_handle_trap_ac(ghcb, ctxt);
+ break;
case SVM_EXIT_RDTSC:
case SVM_EXIT_RDTSCP:
result = vc_handle_rdtsc(ghcb, ctxt, exit_code);
@@ -941,6 +957,9 @@ static void vc_forward_exception(struct es_em_ctxt *ctxt)
case X86_TRAP_UD:
do_invalid_op(ctxt->regs, 0);
break;
+ case X86_TRAP_AC:
+ do_alignment_check(ctxt->regs, error_code);
+ break;
default:
pr_emerg("Unsupported exception in #VC instruction emulation - can't
continue\n");
BUG();
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
Handle #VC exceptions caused by #DB exceptions in the guest. Do not
forward them to the hypervisor and handle them with do_debug() instead.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 050a15da9ae5..03095bc7b563 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -882,6 +882,19 @@ static enum es_result vc_handle_trap_ac(struct ghcb *ghcb,
return ES_EXCEPTION;
}
+static enum es_result vc_handle_trap_db(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ /*
+ * Calling do_debug() directly does not work, because it might enable
+ * IRQs and the GHCB is active. Forward the exception and call it later
+ * from vc_forward_exception().
+ */
+ ctxt->fi.vector = X86_TRAP_DB;
+ ctxt->fi.error_code = 0;
+ return ES_EXCEPTION;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -895,6 +908,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
case SVM_EXIT_WRITE_DR7:
result = vc_handle_dr7_write(ghcb, ctxt);
break;
+ case SVM_EXIT_EXCP_BASE + X86_TRAP_DB:
+ result = vc_handle_trap_db(ghcb, ctxt);
+ break;
case SVM_EXIT_EXCP_BASE + X86_TRAP_AC:
result = vc_handle_trap_ac(ghcb, ctxt);
break;
@@ -960,6 +976,9 @@ static void vc_forward_exception(struct es_em_ctxt *ctxt)
case X86_TRAP_AC:
do_alignment_check(ctxt->regs, error_code);
break;
+ case X86_TRAP_DB:
+ do_debug(ctxt->regs, error_code);
+ break;
default:
pr_emerg("Unsupported exception in #VC instruction emulation - can't
continue\n");
BUG();
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
From: Mike Stunes <mstunes at vmware.com>
To avoid a future VMEXIT for a subsequent CPUID function, cache the
results returned by CPUID into an xarray.
[tl: coding standard changes, register zero extension]
Signed-off-by: Mike Stunes <mstunes at vmware.com>
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Wrapped cache handling into vc_handle_cpuid_cached()
- Used lower_32_bits() where applicable
- Moved cache_index out of struct es_em_ctxt ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es-shared.c | 12 ++--
arch/x86/kernel/sev-es.c | 119 +++++++++++++++++++++++++++++++-
2 files changed, 124 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c
index 5bfc1f3030d4..cfdafe12da4f 100644
--- a/arch/x86/kernel/sev-es-shared.c
+++ b/arch/x86/kernel/sev-es-shared.c
@@ -427,8 +427,8 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
u32 cr4 = native_read_cr4();
enum es_result ret;
- ghcb_set_rax(ghcb, regs->ax);
- ghcb_set_rcx(ghcb, regs->cx);
+ ghcb_set_rax(ghcb, lower_32_bits(regs->ax));
+ ghcb_set_rcx(ghcb, lower_32_bits(regs->cx));
if (cr4 & X86_CR4_OSXSAVE)
/* Safe to read xcr0 */
@@ -447,10 +447,10 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb,
ghcb_is_valid_rdx(ghcb)))
return ES_VMM_ERROR;
- regs->ax = ghcb->save.rax;
- regs->bx = ghcb->save.rbx;
- regs->cx = ghcb->save.rcx;
- regs->dx = ghcb->save.rdx;
+ regs->ax = lower_32_bits(ghcb->save.rax);
+ regs->bx = lower_32_bits(ghcb->save.rbx);
+ regs->cx = lower_32_bits(ghcb->save.rcx);
+ regs->dx = lower_32_bits(ghcb->save.rdx);
return ES_OK;
}
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 03095bc7b563..0303834d4811 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -19,6 +19,7 @@
#include <linux/memblock.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <linux/xarray.h>
#include <generated/asm-offsets.h>
#include <asm/cpu_entry_area.h>
@@ -33,6 +34,16 @@
#define DR7_RESET_VALUE 0x400
+struct sev_es_cpuid_cache_entry {
+ unsigned long eax;
+ unsigned long ebx;
+ unsigned long ecx;
+ unsigned long edx;
+};
+
+static struct xarray sev_es_cpuid_cache;
+static bool __ro_after_init sev_es_cpuid_cache_initialized;
+
/* For early boot hypervisor communication in SEV-ES enabled guests */
static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE);
@@ -463,6 +474,9 @@ void __init sev_es_init_vc_handling(void)
sev_es_setup_vc_stack(cpu);
}
+ xa_init_flags(&sev_es_cpuid_cache, XA_FLAGS_LOCK_IRQ);
+ sev_es_cpuid_cache_initialized = true;
+
init_vc_stack_names();
}
@@ -744,6 +758,91 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb,
return ret;
}
+static unsigned long sev_es_get_cpuid_cache_index(struct es_em_ctxt *ctxt)
+{
+ unsigned long hi, lo;
+
+ /* Don't attempt to cache until the xarray is initialized */
+ if (!sev_es_cpuid_cache_initialized)
+ return ULONG_MAX;
+
+ lo = lower_32_bits(ctxt->regs->ax);
+
+ /*
+ * CPUID 0x0000000d requires both RCX and XCR0, so it can't be
+ * cached.
+ */
+ if (lo == 0x0000000d)
+ return ULONG_MAX;
+
+ /*
+ * Some callers of CPUID don't always set RCX to zero for CPUID
+ * functions that don't require RCX, which can result in excessive
+ * cached values, so RCX needs to be manually zeroed for use as part
+ * of the cache index. Future CPUID values may need RCX, but since
+ * they can't be known, they must not be cached.
+ */
+ if (lo > 0x80000020)
+ return ULONG_MAX;
+
+ switch (lo) {
+ case 0x00000007:
+ case 0x0000000b:
+ case 0x0000000f:
+ case 0x00000010:
+ case 0x8000001d:
+ case 0x80000020:
+ hi = ctxt->regs->cx << 32;
+ break;
+ default:
+ hi = 0;
+ }
+
+ return hi | lo;
+}
+
+static bool sev_es_check_cpuid_cache(struct es_em_ctxt *ctxt,
+ unsigned long cache_index)
+{
+ struct sev_es_cpuid_cache_entry *cache_entry;
+
+ if (cache_index == ULONG_MAX)
+ return false;
+
+ cache_entry = xa_load(&sev_es_cpuid_cache, cache_index);
+ if (!cache_entry)
+ return false;
+
+ ctxt->regs->ax = cache_entry->eax;
+ ctxt->regs->bx = cache_entry->ebx;
+ ctxt->regs->cx = cache_entry->ecx;
+ ctxt->regs->dx = cache_entry->edx;
+
+ return true;
+}
+
+static void sev_es_add_cpuid_cache(struct es_em_ctxt *ctxt,
+ unsigned long cache_index)
+{
+ struct sev_es_cpuid_cache_entry *cache_entry;
+ int ret;
+
+ if (cache_index == ULONG_MAX)
+ return;
+
+ cache_entry = kzalloc(sizeof(*cache_entry), GFP_ATOMIC);
+ if (cache_entry) {
+ cache_entry->eax = ctxt->regs->ax;
+ cache_entry->ebx = ctxt->regs->bx;
+ cache_entry->ecx = ctxt->regs->cx;
+ cache_entry->edx = ctxt->regs->dx;
+
+ /* Ignore insertion errors */
+ ret = xa_insert(&sev_es_cpuid_cache, cache_index,
+ cache_entry, GFP_ATOMIC);
+ }
+}
+
static enum es_result vc_handle_dr7_write(struct ghcb *ghcb,
struct es_em_ctxt *ctxt)
{
@@ -895,6 +994,24 @@ static enum es_result vc_handle_trap_db(struct ghcb *ghcb,
return ES_EXCEPTION;
}
+static enum es_result vc_handle_cpuid_cached(struct ghcb *ghcb,
+ struct es_em_ctxt *ctxt)
+{
+ unsigned long cache_index;
+ enum es_result result;
+
+ cache_index = sev_es_get_cpuid_cache_index(ctxt);
+
+ if (sev_es_check_cpuid_cache(ctxt, cache_index))
+ return ES_OK;
+
+ result = vc_handle_cpuid(ghcb, ctxt);
+ if (result == ES_OK)
+ sev_es_add_cpuid_cache(ctxt, cache_index);
+
+ return result;
+}
+
static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt,
struct ghcb *ghcb,
unsigned long exit_code)
@@ -926,7 +1043,7 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt
*ctxt,
result = ES_UNSUPPORTED;
break;
case SVM_EXIT_CPUID:
- result = vc_handle_cpuid(ghcb, ctxt);
+ result = vc_handle_cpuid_cached(ghcb, ctxt);
break;
case SVM_EXIT_IOIO:
result = vc_handle_ioio(ghcb, ctxt);
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 65/75] x86/paravirt: Allow hypervisor specific VMMCALL handling under SEV-ES
From: Joerg Roedel <jroedel at suse.de>
Add two new paravirt callbacks to provide hypervisor specific processor
state in the GHCB and to copy state from the hypervisor back to the
processor.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/x86_init.h | 16 +++++++++++++++-
arch/x86/kernel/sev-es.c | 12 ++++++++++++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 96d9cd208610..c4790ec279cc 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -4,8 +4,10 @@
#include <asm/bootparam.h>
+struct ghcb;
struct mpc_bus;
struct mpc_cpu;
+struct pt_regs;
struct mpc_table;
struct cpuinfo_x86;
@@ -238,10 +240,22 @@ struct x86_legacy_features {
/**
* struct x86_hyper_runtime - x86 hypervisor specific runtime callbacks
*
- * @pin_vcpu: pin current vcpu to specified physical cpu (run rarely)
+ * @pin_vcpu: pin current vcpu to specified physical
+ * cpu (run rarely)
+ * @sev_es_hcall_prepare: Load additional hypervisor-specific
+ * state into the GHCB when doing a VMMCALL under
+ * SEV-ES. Called from the #VC exception handler.
+ * @sev_es_hcall_finish: Copies state from the GHCB back into the
+ * processor (or pt_regs). Also runs checks on the
+ * state returned from the hypervisor after a
+ * VMMCALL under SEV-ES. Needs to return 'false'
+ * if the checks fail. Called from the #VC
+ * exception handler.
*/
struct x86_hyper_runtime {
void (*pin_vcpu)(int cpu);
+ void (*sev_es_hcall_prepare)(struct ghcb *ghcb, struct pt_regs *regs);
+ bool (*sev_es_hcall_finish)(struct ghcb *ghcb, struct pt_regs *regs);
};
/**
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 0303834d4811..047fa47ef9d4 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -956,6 +956,9 @@ static enum es_result vc_handle_vmmcall(struct ghcb *ghcb,
ghcb_set_rax(ghcb, ctxt->regs->ax);
ghcb_set_cpl(ghcb, user_mode(ctxt->regs) ? 3 : 0);
+ if (x86_platform.hyper.sev_es_hcall_prepare)
+ x86_platform.hyper.sev_es_hcall_prepare(ghcb, ctxt->regs);
+
ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_VMMCALL, 0, 0);
if (ret != ES_OK)
return ret;
@@ -965,6 +968,15 @@ static enum es_result vc_handle_vmmcall(struct ghcb *ghcb,
ctxt->regs->ax = ghcb->save.rax;
+ /*
+ * Call sev_es_hcall_finish() after regs->ax is already set.
+ * This allows the hypervisor handler to overwrite it again if
+ * necessary.
+ */
+ if (x86_platform.hyper.sev_es_hcall_finish &&
+ !x86_platform.hyper.sev_es_hcall_finish(ghcb, ctxt->regs))
+ return ES_VMM_ERROR;
+
return ES_OK;
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 66/75] x86/kvm: Add KVM specific VMMCALL handling under SEV-ES
From: Tom Lendacky <thomas.lendacky at amd.com>
Implement the callbacks to copy the processor state required by KVM to
the GHCB.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Split out of a larger patch
- Adapt to different callback functions ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/kvm.c | 35 +++++++++++++++++++++++++++++------
1 file changed, 29 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 6efe0410fb72..0e3fc798d719 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -34,6 +34,8 @@
#include <asm/hypervisor.h>
#include <asm/tlb.h>
#include <asm/cpuidle_haltpoll.h>
+#include <asm/ptrace.h>
+#include <asm/svm.h>
static int kvmapf = 1;
@@ -729,13 +731,34 @@ static void __init kvm_init_platform(void)
x86_platform.apic_post_init = kvm_apic_init;
}
+#if defined(CONFIG_AMD_MEM_ENCRYPT)
+static void kvm_sev_es_hcall_prepare(struct ghcb *ghcb, struct pt_regs *regs)
+{
+ /* RAX and CPL are already in the GHCB */
+ ghcb_set_rbx(ghcb, regs->bx);
+ ghcb_set_rcx(ghcb, regs->cx);
+ ghcb_set_rdx(ghcb, regs->dx);
+ ghcb_set_rsi(ghcb, regs->si);
+}
+
+static bool kvm_sev_es_hcall_finish(struct ghcb *ghcb, struct pt_regs *regs)
+{
+ /* No checking of the return state needed */
+ return true;
+}
+#endif
+
const __initconst struct hypervisor_x86 x86_hyper_kvm = {
- .name = "KVM",
- .detect = kvm_detect,
- .type = X86_HYPER_KVM,
- .init.guest_late_init = kvm_guest_init,
- .init.x2apic_available = kvm_para_available,
- .init.init_platform = kvm_init_platform,
+ .name = "KVM",
+ .detect = kvm_detect,
+ .type = X86_HYPER_KVM,
+ .init.guest_late_init = kvm_guest_init,
+ .init.x2apic_available = kvm_para_available,
+ .init.init_platform = kvm_init_platform,
+#if defined(CONFIG_AMD_MEM_ENCRYPT)
+ .runtime.sev_es_hcall_prepare = kvm_sev_es_hcall_prepare,
+ .runtime.sev_es_hcall_finish = kvm_sev_es_hcall_finish,
+#endif
};
static __init int activate_jump_labels(void)
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 67/75] x86/vmware: Add VMware specific handling for VMMCALL under SEV-ES
From: Doug Covelli <dcovelli at vmware.com>
This change adds VMware specific handling for #VC faults caused by
VMMCALL instructions.
Signed-off-by: Doug Covelli <dcovelli at vmware.com>
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Adapt to different paravirt interface ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/cpu/vmware.c | 50 ++++++++++++++++++++++++++++++++----
1 file changed, 45 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 9b6fafa69be9..d2129d5e8373 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -33,6 +33,7 @@
#include <asm/timer.h>
#include <asm/apic.h>
#include <asm/vmware.h>
+#include <asm/svm.h>
#undef pr_fmt
#define pr_fmt(fmt) "vmware: " fmt
@@ -476,10 +477,49 @@ static bool __init vmware_legacy_x2apic_available(void)
(eax & (1 << VMWARE_CMD_LEGACY_X2APIC)) != 0;
}
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+static void vmware_sev_es_hcall_prepare(struct ghcb *ghcb,
+ struct pt_regs *regs)
+{
+ /* Copy VMWARE specific Hypercall parameters to the GHCB */
+ ghcb_set_rip(ghcb, regs->ip);
+ ghcb_set_rbx(ghcb, regs->bx);
+ ghcb_set_rcx(ghcb, regs->cx);
+ ghcb_set_rdx(ghcb, regs->dx);
+ ghcb_set_rsi(ghcb, regs->si);
+ ghcb_set_rdi(ghcb, regs->di);
+ ghcb_set_rbp(ghcb, regs->bp);
+}
+
+static bool vmware_sev_es_hcall_finish(struct ghcb *ghcb, struct pt_regs *regs)
+{
+ if (!(ghcb_is_valid_rbx(ghcb) &&
+ ghcb_is_valid_rcx(ghcb) &&
+ ghcb_is_valid_rdx(ghcb) &&
+ ghcb_is_valid_rsi(ghcb) &&
+ ghcb_is_valid_rdi(ghcb) &&
+ ghcb_is_valid_rbp(ghcb)))
+ return false;
+
+ regs->bx = ghcb->save.rbx;
+ regs->cx = ghcb->save.rcx;
+ regs->dx = ghcb->save.rdx;
+ regs->si = ghcb->save.rsi;
+ regs->di = ghcb->save.rdi;
+ regs->bp = ghcb->save.rbp;
+
+ return true;
+}
+#endif
+
const __initconst struct hypervisor_x86 x86_hyper_vmware = {
- .name = "VMware",
- .detect = vmware_platform,
- .type = X86_HYPER_VMWARE,
- .init.init_platform = vmware_platform_setup,
- .init.x2apic_available = vmware_legacy_x2apic_available,
+ .name = "VMware",
+ .detect = vmware_platform,
+ .type = X86_HYPER_VMWARE,
+ .init.init_platform = vmware_platform_setup,
+ .init.x2apic_available = vmware_legacy_x2apic_available,
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ .runtime.sev_es_hcall_prepare = vmware_sev_es_hcall_prepare,
+ .runtime.sev_es_hcall_finish = vmware_sev_es_hcall_finish,
+#endif
};
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 68/75] x86/realmode: Add SEV-ES specific trampoline entry point
From: Joerg Roedel <jroedel at suse.de>
The code at the trampoline entry point is executed in real-mode. In
real-mode #VC exceptions can't be handled, so anything that might cause
such an exception must be avoided.
In the standard trampoline entry code this is the WBINVD instruction and
the call to verify_cpu(), which are both not needed anyway when running
as an SEV-ES guest.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/realmode.h | 3 +++
arch/x86/realmode/rm/header.S | 3 +++
arch/x86/realmode/rm/trampoline_64.S | 20 ++++++++++++++++++++
3 files changed, 26 insertions(+)
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h
index b35030eeec36..6590394af309 100644
--- a/arch/x86/include/asm/realmode.h
+++ b/arch/x86/include/asm/realmode.h
@@ -21,6 +21,9 @@ struct real_mode_header {
/* SMP trampoline */
u32 trampoline_start;
u32 trampoline_header;
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ u32 sev_es_trampoline_start;
+#endif
#ifdef CONFIG_X86_64
u32 trampoline_pgd;
#endif
diff --git a/arch/x86/realmode/rm/header.S b/arch/x86/realmode/rm/header.S
index af04512c02d9..8c1db5bf5d78 100644
--- a/arch/x86/realmode/rm/header.S
+++ b/arch/x86/realmode/rm/header.S
@@ -20,6 +20,9 @@ SYM_DATA_START(real_mode_header)
/* SMP trampoline */
.long pa_trampoline_start
.long pa_trampoline_header
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ .long pa_sev_es_trampoline_start
+#endif
#ifdef CONFIG_X86_64
.long pa_trampoline_pgd;
#endif
diff --git a/arch/x86/realmode/rm/trampoline_64.S
b/arch/x86/realmode/rm/trampoline_64.S
index 251758ed7443..84c5d1b33d10 100644
--- a/arch/x86/realmode/rm/trampoline_64.S
+++ b/arch/x86/realmode/rm/trampoline_64.S
@@ -56,6 +56,7 @@ SYM_CODE_START(trampoline_start)
testl %eax, %eax # Check for return code
jnz no_longmode
+.Lswitch_to_protected:
/*
* GDT tables in non default location kernel can be beyond 16MB and
* lgdt will not be able to load the address as in real mode default
@@ -80,6 +81,25 @@ no_longmode:
jmp no_longmode
SYM_CODE_END(trampoline_start)
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+/* SEV-ES supports non-zero IP for entry points - no alignment needed */
+SYM_CODE_START(sev_es_trampoline_start)
+ cli # We should be safe anyway
+
+ LJMPW_RM(1f)
+1:
+ mov %cs, %ax # Code and data in the same place
+ mov %ax, %ds
+ mov %ax, %es
+ mov %ax, %ss
+
+ # Setup stack
+ movl $rm_stack_end, %esp
+
+ jmp .Lswitch_to_protected
+SYM_CODE_END(sev_es_trampoline_start)
+#endif /* CONFIG_AMD_MEM_ENCRYPT */
+
#include "../kernel/verify_cpu.S"
.section ".text32","ax"
--
2.17.1
From: Tom Lendacky <thomas.lendacky at amd.com>
Setup the AP jump table to point to the SEV-ES trampoline code so that
the APs can boot.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: - Adapted to different code base
- Moved AP table setup from SIPI sending path to
real-mode setup code
- Fix sparse warnings ]
Co-developed-by: Joerg Roedel <jroedel at suse.de>
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/sev-es.h | 6 +++
arch/x86/include/uapi/asm/svm.h | 3 ++
arch/x86/kernel/sev-es.c | 66 +++++++++++++++++++++++++++++++++
arch/x86/realmode/init.c | 6 +++
4 files changed, 81 insertions(+)
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index ca0e12cb089c..c89b6e2e6439 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -78,17 +78,23 @@ static inline u64 lower_bits(u64 val, unsigned int bits)
extern void vc_no_ghcb(void);
extern bool vc_boot_ghcb(struct pt_regs *regs);
+struct real_mode_header;
enum stack_type;
#ifdef CONFIG_AMD_MEM_ENCRYPT
const char *vc_stack_name(enum stack_type type);
void sev_es_nmi_enter(void);
void sev_es_nmi_exit(void);
+int sev_es_setup_ap_jump_table(struct real_mode_header *rmh);
#else /* CONFIG_AMD_MEM_ENCRYPT */
static inline const char *vc_stack_name(enum stack_type type)
{
return NULL;
}
+static inline int sev_es_setup_ap_jump_table(struct real_mode_header *rmh)
+{
+ return 0;
+}
#endif /* CONFIG_AMD_MEM_ENCRYPT*/
#endif
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
index 8f36ae021a7f..a19ce9681ec2 100644
--- a/arch/x86/include/uapi/asm/svm.h
+++ b/arch/x86/include/uapi/asm/svm.h
@@ -84,6 +84,9 @@
/* SEV-ES software-defined VMGEXIT events */
#define SVM_VMGEXIT_MMIO_READ 0x80000001
#define SVM_VMGEXIT_MMIO_WRITE 0x80000002
+#define SVM_VMGEXIT_AP_JUMP_TABLE 0x80000005
+#define SVM_VMGEXIT_SET_AP_JUMP_TABLE 0
+#define SVM_VMGEXIT_GET_AP_JUMP_TABLE 1
#define SVM_VMGEXIT_UNSUPPORTED_EVENT 0x8000ffff
#define SVM_EXIT_ERR -1
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 047fa47ef9d4..28725c38e6fb 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -25,6 +25,7 @@
#include <asm/cpu_entry_area.h>
#include <asm/stacktrace.h>
#include <asm/trap_defs.h>
+#include <asm/realmode.h>
#include <asm/sev-es.h>
#include <asm/insn-eval.h>
#include <asm/fpu/internal.h>
@@ -159,6 +160,8 @@ static void sev_es_put_ghcb(struct ghcb_state *state)
/* Needed in vc_early_vc_forward_exception */
void do_early_exception(struct pt_regs *regs, int trapnr);
+static inline u64 sev_es_rd_ghcb_msr(void);
+
static inline u64 sev_es_rd_ghcb_msr(void)
{
return native_read_msr(MSR_AMD64_SEV_ES_GHCB);
@@ -336,6 +339,69 @@ static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb,
unsigned long vaddr)
/* Include code shared with pre-decompression boot stage */
#include "sev-es-shared.c"
+static u64 sev_es_get_jump_table_addr(void)
+{
+ struct ghcb_state state;
+ unsigned long flags;
+ struct ghcb *ghcb;
+ u64 ret;
+
+ local_irq_save(flags);
+
+ ghcb = sev_es_get_ghcb(&state);
+
+ vc_ghcb_invalidate(ghcb);
+ ghcb_set_sw_exit_code(ghcb, SVM_VMGEXIT_AP_JUMP_TABLE);
+ ghcb_set_sw_exit_info_1(ghcb, SVM_VMGEXIT_GET_AP_JUMP_TABLE);
+ ghcb_set_sw_exit_info_2(ghcb, 0);
+
+ sev_es_wr_ghcb_msr(__pa(ghcb));
+ VMGEXIT();
+
+ if (!ghcb_is_valid_sw_exit_info_1(ghcb) ||
+ !ghcb_is_valid_sw_exit_info_2(ghcb))
+ ret = 0;
+
+ ret = ghcb->save.sw_exit_info_2;
+
+ sev_es_put_ghcb(&state);
+
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+int sev_es_setup_ap_jump_table(struct real_mode_header *rmh)
+{
+ u16 startup_cs, startup_ip;
+ phys_addr_t jump_table_pa;
+ u64 jump_table_addr;
+ u16 __iomem *jump_table;
+
+ jump_table_addr = sev_es_get_jump_table_addr();
+
+ /* Check if AP Jump Table is non-zero and page-aligned */
+ if (!jump_table_addr || jump_table_addr & ~PAGE_MASK)
+ return 0;
+
+ jump_table_pa = jump_table_addr & PAGE_MASK;
+
+ startup_cs = (u16)(rmh->trampoline_start >> 4);
+ startup_ip = (u16)(rmh->sev_es_trampoline_start -
+ rmh->trampoline_start);
+
+ jump_table = ioremap_encrypted(jump_table_pa, PAGE_SIZE);
+ if (!jump_table)
+ return -EIO;
+
+ writew(startup_ip, &jump_table[0]);
+ writew(startup_cs, &jump_table[1]);
+
+ iounmap(jump_table);
+
+ return 0;
+}
+
static enum es_result vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c
index 262f83cad355..1c5cbfd102d5 100644
--- a/arch/x86/realmode/init.c
+++ b/arch/x86/realmode/init.c
@@ -9,6 +9,7 @@
#include <asm/realmode.h>
#include <asm/tlbflush.h>
#include <asm/crash.h>
+#include <asm/sev-es.h>
struct real_mode_header *real_mode_header;
u32 *trampoline_cr4_features;
@@ -107,6 +108,11 @@ static void __init setup_real_mode(void)
if (sme_active())
trampoline_header->flags |= TH_FLAGS_SME_ACTIVE;
+ if (sev_es_active()) {
+ if (sev_es_setup_ap_jump_table(real_mode_header))
+ panic("Failed to update SEV-ES AP Jump Table");
+ }
+
trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd);
trampoline_pgd[0] = trampoline_pgd_entry.pgd;
trampoline_pgd[511] = init_top_pgt[511].pgd;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 70/75] x86/head/64: Setup TSS early for secondary CPUs
From: Joerg Roedel <jroedel at suse.de>
The #VC exception will trigger very early in head_64.S, when the first
CPUID instruction is executed. When secondary CPUs boot, they already
load the real system IDT, which has the #VC handler configured to be
using an IST stack. IST stacks require a TSS to be loaded, to set up the
TSS early for bringing up the secondary CPUs. Use the RW version of
early, until cpu_init() switches to the RO mapping.
On the boot CPU the TSS will also be loaded early, but not used as the
the early #VC handlers do not use IST stacks.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/desc.h | 2 ++
arch/x86/kernel/head64.c | 13 +++++++++++++
arch/x86/kernel/head_64.S | 3 +++
3 files changed, 18 insertions(+)
diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index 30e2a0e863b6..0777b100dc63 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -40,6 +40,8 @@ static inline void fill_ldt(struct desc_struct *desc, const
struct user_desc *in
desc->l = 0;
}
+extern unsigned char boot_gdt[];
+
extern struct desc_ptr idt_descr;
extern gate_desc idt_table[];
extern const struct desc_ptr debug_idt_descr;
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index d83d59c15548..30a6d09fd9d0 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -523,6 +523,19 @@ void __head early_idt_setup_early_handler(unsigned long
physaddr)
}
}
+void __head early_load_tss(void)
+{
+ struct desc_struct *gdt = (struct desc_struct *)boot_gdt;
+ struct tss_struct *tss = this_cpu_ptr(&cpu_tss_rw);
+ tss_desc tss_desc;
+
+ set_tssldt_descriptor(&tss_desc, (unsigned long)tss, DESC_TSS,
+ __KERNEL_TSS_LIMIT);
+ native_write_gdt_entry(gdt, GDT_ENTRY_TSS, &tss_desc, DESC_TSS);
+
+ asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));
+}
+
void __head early_idt_setup(unsigned long physbase)
{
gate_desc *idt = fixup_pointer(idt_table, physbase);
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 4d84a0c72e36..7f2d5e14db73 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -220,6 +220,9 @@ SYM_CODE_START(secondary_startup_64)
*/
movq initial_stack(%rip), %rsp
+ /* Setup a TSS for early IST handlers - needs %gs to be set up */
+ call early_load_tss
+
/* Load IDT */
lidt idt_descr(%rip)
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 71/75] x86/head/64: Don't call verify_cpu() on starting APs
From: Joerg Roedel <jroedel at suse.de>
The APs are not ready to handle exceptions when verify_cpu() is called
in secondary_startup_64.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/realmode.h | 1 +
arch/x86/kernel/head_64.S | 1 +
arch/x86/realmode/init.c | 6 ++++++
3 files changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h
index 6590394af309..5c97807c38a4 100644
--- a/arch/x86/include/asm/realmode.h
+++ b/arch/x86/include/asm/realmode.h
@@ -69,6 +69,7 @@ extern unsigned char startup_32_smp[];
extern unsigned char boot_gdt[];
#else
extern unsigned char secondary_startup_64[];
+extern unsigned char secondary_startup_64_no_verify[];
#endif
static inline size_t real_mode_size_needed(void)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 7f2d5e14db73..72b8f0834de1 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -150,6 +150,7 @@ SYM_CODE_START(secondary_startup_64)
/* Sanitize CPU configuration */
call verify_cpu
+SYM_INNER_LABEL(secondary_startup_64_no_verify, SYM_L_GLOBAL)
/*
* Retrieve the modifier (SME encryption mask if SME is active) to be
* added to the initial pgdir entry that will be programmed into CR3.
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c
index 1c5cbfd102d5..030c38268069 100644
--- a/arch/x86/realmode/init.c
+++ b/arch/x86/realmode/init.c
@@ -109,6 +109,12 @@ static void __init setup_real_mode(void)
trampoline_header->flags |= TH_FLAGS_SME_ACTIVE;
if (sev_es_active()) {
+ /*
+ * Skip the call to verify_cpu() in secondary_startup_64 as it
+ * will cause #VC exceptions when the AP can't handle them yet.
+ */
+ trampoline_header->start = (u64) secondary_startup_64_no_verify;
+
if (sev_es_setup_ap_jump_table(real_mode_header))
panic("Failed to update SEV-ES AP Jump Table");
}
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
For SEV-ES this entry point will be used for restarting APs after they
have been offlined. Remove the '0' from the name to reflect that.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/cpu.h | 2 +-
arch/x86/kernel/head_32.S | 4 ++--
arch/x86/kernel/head_64.S | 6 +++---
arch/x86/kernel/smpboot.c | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index dd17c2da1af5..427ae362bbdd 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -29,7 +29,7 @@ struct x86_cpu {
#ifdef CONFIG_HOTPLUG_CPU
extern int arch_register_cpu(int num);
extern void arch_unregister_cpu(int);
-extern void start_cpu0(void);
+extern void start_cpu(void);
#ifdef CONFIG_DEBUG_HOTPLUG_CPU0
extern int _debug_hotplug_cpu(int cpu, int action);
#endif
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index f66a6b90f954..aad62c677486 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -174,12 +174,12 @@ SYM_CODE_END(startup_32)
* up already except stack. We just set up stack here. Then call
* start_secondary().
*/
-SYM_FUNC_START(start_cpu0)
+SYM_FUNC_START(start_cpu)
movl initial_stack, %ecx
movl %ecx, %esp
call *(initial_code)
1: jmp 1b
-SYM_FUNC_END(start_cpu0)
+SYM_FUNC_END(start_cpu)
#endif
/*
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 72b8f0834de1..4502f5d3b9b1 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -302,15 +302,15 @@ SYM_CODE_END(secondary_startup_64)
#ifdef CONFIG_HOTPLUG_CPU
/*
- * Boot CPU0 entry point. It's called from play_dead(). Everything has been
set
+ * CPU entry point. It's called from play_dead(). Everything has been set
* up already except stack. We just set up stack here. Then call
* start_secondary() via .Ljump_to_C_code.
*/
-SYM_CODE_START(start_cpu0)
+SYM_CODE_START(start_cpu)
UNWIND_HINT_EMPTY
movq initial_stack(%rip), %rsp
jmp .Ljump_to_C_code
-SYM_CODE_END(start_cpu0)
+SYM_CODE_END(start_cpu)
#endif
/* Both SMP bootup and ACPI suspend change these variables */
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 8c89e4d9ad28..f57685d81bb6 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1721,7 +1721,7 @@ static inline void mwait_play_dead(void)
* If NMI wants to wake up CPU0, start CPU0.
*/
if (wakeup_cpu0())
- start_cpu0();
+ start_cpu();
}
}
@@ -1736,7 +1736,7 @@ void hlt_play_dead(void)
* If NMI wants to wake up CPU0, start CPU0.
*/
if (wakeup_cpu0())
- start_cpu0();
+ start_cpu();
}
}
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 73/75] x86/sev-es: Support CPU offline/online
From: Joerg Roedel <jroedel at suse.de>
Add a play_dead handler when running under SEV-ES. This is needed
because the hypervisor can't deliver an SIPI request to restart the AP.
Instead the kernel has to issue a VMGEXIT to halt the VCPU. When the
hypervisor would deliver and SIPI is wakes up the VCPU instead.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/uapi/asm/svm.h | 1 +
arch/x86/kernel/sev-es.c | 58 +++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+)
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
index a19ce9681ec2..20a05839dd9a 100644
--- a/arch/x86/include/uapi/asm/svm.h
+++ b/arch/x86/include/uapi/asm/svm.h
@@ -84,6 +84,7 @@
/* SEV-ES software-defined VMGEXIT events */
#define SVM_VMGEXIT_MMIO_READ 0x80000001
#define SVM_VMGEXIT_MMIO_WRITE 0x80000002
+#define SVM_VMGEXIT_AP_HLT_LOOP 0x80000004
#define SVM_VMGEXIT_AP_JUMP_TABLE 0x80000005
#define SVM_VMGEXIT_SET_AP_JUMP_TABLE 0
#define SVM_VMGEXIT_GET_AP_JUMP_TABLE 1
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 28725c38e6fb..00a5d0483730 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -32,6 +32,8 @@
#include <asm/processor.h>
#include <asm/traps.h>
#include <asm/svm.h>
+#include <asm/smp.h>
+#include <asm/cpu.h>
#define DR7_RESET_VALUE 0x400
@@ -448,6 +450,60 @@ static bool __init sev_es_setup_ghcb(void)
return true;
}
+#ifdef CONFIG_HOTPLUG_CPU
+static void sev_es_ap_hlt_loop(void)
+{
+ struct ghcb_state state;
+ struct ghcb *ghcb;
+
+ ghcb = sev_es_get_ghcb(&state);
+
+ while (true) {
+ vc_ghcb_invalidate(ghcb);
+ ghcb_set_sw_exit_code(ghcb, SVM_VMGEXIT_AP_HLT_LOOP);
+ ghcb_set_sw_exit_info_1(ghcb, 0);
+ ghcb_set_sw_exit_info_2(ghcb, 0);
+
+ sev_es_wr_ghcb_msr(__pa(ghcb));
+ VMGEXIT();
+
+ /* Wakup Signal? */
+ if (ghcb_is_valid_sw_exit_info_2(ghcb) &&
+ ghcb->save.sw_exit_info_2 != 0)
+ break;
+ }
+
+ sev_es_put_ghcb(&state);
+}
+
+static void sev_es_play_dead(void)
+{
+ play_dead_common();
+
+ /* IRQs now disabled */
+
+ sev_es_ap_hlt_loop();
+
+ /*
+ * If we get here, the VCPU was woken up again. Jump to CPU
+ * startup code to get it back online.
+ */
+
+ start_cpu();
+}
+#else /* CONFIG_HOTPLUG_CPU */
+#define sev_es_play_dead native_play_dead
+#endif /* CONFIG_HOTPLUG_CPU */
+
+#ifdef CONFIG_SMP
+static void __init sev_es_setup_play_dead(void)
+{
+ smp_ops.play_dead = sev_es_play_dead;
+}
+#else
+static inline void sev_es_setup_play_dead(void) { }
+#endif
+
static void __init sev_es_alloc_runtime_data(int cpu)
{
struct sev_es_runtime_data *data;
@@ -540,6 +596,8 @@ void __init sev_es_init_vc_handling(void)
sev_es_setup_vc_stack(cpu);
}
+ sev_es_setup_play_dead();
+
xa_init_flags(&sev_es_cpuid_cache, XA_FLAGS_LOCK_IRQ);
sev_es_cpuid_cache_initialized = true;
--
2.17.1
From: Joerg Roedel <jroedel at suse.de>
When running under SEV-ES the kernel has to tell the hypervisor when to
open the NMI window again after an NMI was injected. This is done with
an NMI-complete message to the hypervisor.
Add code to the kernels NMI handler to send this message right at the
beginning of do_nmi(). This always allows nesting NMIs.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/include/asm/sev-es.h | 2 ++
arch/x86/include/uapi/asm/svm.h | 1 +
arch/x86/kernel/nmi.c | 7 +++++++
arch/x86/kernel/sev-es.c | 18 ++++++++++++++++++
4 files changed, 28 insertions(+)
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index c89b6e2e6439..a242d16727f1 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -86,6 +86,7 @@ const char *vc_stack_name(enum stack_type type);
void sev_es_nmi_enter(void);
void sev_es_nmi_exit(void);
int sev_es_setup_ap_jump_table(struct real_mode_header *rmh);
+void sev_es_nmi_complete(void);
#else /* CONFIG_AMD_MEM_ENCRYPT */
static inline const char *vc_stack_name(enum stack_type type)
{
@@ -95,6 +96,7 @@ static inline int sev_es_setup_ap_jump_table(struct
real_mode_header *rmh)
{
return 0;
}
+static inline void sev_es_nmi_complete(void) { }
#endif /* CONFIG_AMD_MEM_ENCRYPT*/
#endif
diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h
index 20a05839dd9a..0f837339db66 100644
--- a/arch/x86/include/uapi/asm/svm.h
+++ b/arch/x86/include/uapi/asm/svm.h
@@ -84,6 +84,7 @@
/* SEV-ES software-defined VMGEXIT events */
#define SVM_VMGEXIT_MMIO_READ 0x80000001
#define SVM_VMGEXIT_MMIO_WRITE 0x80000002
+#define SVM_VMGEXIT_NMI_COMPLETE 0x80000003
#define SVM_VMGEXIT_AP_HLT_LOOP 0x80000004
#define SVM_VMGEXIT_AP_JUMP_TABLE 0x80000005
#define SVM_VMGEXIT_SET_AP_JUMP_TABLE 0
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 27d1016ec840..8898002e5600 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -511,6 +511,13 @@ NOKPROBE_SYMBOL(is_debug_stack);
dotraplinkage notrace void
do_nmi(struct pt_regs *regs, long error_code)
{
+ /*
+ * Re-enable NMIs right here when running as an SEV-ES guest. This might
+ * cause nested NMIs, but those can be handled safely.
+ */
+ if (sev_es_active())
+ sev_es_nmi_complete();
+
if (IS_ENABLED(CONFIG_SMP) && cpu_is_offline(smp_processor_id()))
return;
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 00a5d0483730..eef6e2196ef4 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -341,6 +341,24 @@ static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb,
unsigned long vaddr)
/* Include code shared with pre-decompression boot stage */
#include "sev-es-shared.c"
+void sev_es_nmi_complete(void)
+{
+ struct ghcb_state state;
+ struct ghcb *ghcb;
+
+ ghcb = sev_es_get_ghcb(&state);
+
+ vc_ghcb_invalidate(ghcb);
+ ghcb_set_sw_exit_code(ghcb, SVM_VMGEXIT_NMI_COMPLETE);
+ ghcb_set_sw_exit_info_1(ghcb, 0);
+ ghcb_set_sw_exit_info_2(ghcb, 0);
+
+ sev_es_wr_ghcb_msr(__pa(ghcb));
+ VMGEXIT();
+
+ sev_es_put_ghcb(&state);
+}
+
static u64 sev_es_get_jump_table_addr(void)
{
struct ghcb_state state;
--
2.17.1
Joerg Roedel
2020-Apr-28 15:17 UTC
[PATCH v3 75/75] x86/efi: Add GHCB mappings when SEV-ES is active
From: Tom Lendacky <thomas.lendacky at amd.com>
Calling down to EFI runtime services can result in the firmware performing
VMGEXIT calls. The firmware is likely to use the GHCB of the OS (e.g., for
setting EFI variables), so each GHCB in the system needs to be identity
mapped in the EFI page tables, as unencrypted, to avoid page faults.
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
[ jroedel at suse.de: Moved GHCB mapping loop to sev-es.c ]
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/boot/compressed/sev-es.c | 1 +
arch/x86/include/asm/sev-es.h | 5 +++++
arch/x86/kernel/sev-es.c | 25 +++++++++++++++++++++++++
arch/x86/platform/efi/efi_64.c | 10 ++++++++++
4 files changed, 41 insertions(+)
diff --git a/arch/x86/boot/compressed/sev-es.c
b/arch/x86/boot/compressed/sev-es.c
index 12a5d918d837..30b2cebf5fed 100644
--- a/arch/x86/boot/compressed/sev-es.c
+++ b/arch/x86/boot/compressed/sev-es.c
@@ -12,6 +12,7 @@
*/
#include "misc.h"
+#include <asm/pgtable_types.h>
#include <asm/sev-es.h>
#include <asm/trap_defs.h>
#include <asm/msr-index.h>
diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h
index a242d16727f1..ce9a197bf958 100644
--- a/arch/x86/include/asm/sev-es.h
+++ b/arch/x86/include/asm/sev-es.h
@@ -87,6 +87,7 @@ void sev_es_nmi_enter(void);
void sev_es_nmi_exit(void);
int sev_es_setup_ap_jump_table(struct real_mode_header *rmh);
void sev_es_nmi_complete(void);
+int __init sev_es_efi_map_ghcbs(pgd_t *pgd);
#else /* CONFIG_AMD_MEM_ENCRYPT */
static inline const char *vc_stack_name(enum stack_type type)
{
@@ -97,6 +98,10 @@ static inline int sev_es_setup_ap_jump_table(struct
real_mode_header *rmh)
return 0;
}
static inline void sev_es_nmi_complete(void) { }
+static inline int sev_es_efi_map_ghcbs(pgd_t *pgd)
+{
+ return 0;
+}
#endif /* CONFIG_AMD_MEM_ENCRYPT*/
#endif
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index eef6e2196ef4..3b62714723b5 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -422,6 +422,31 @@ int sev_es_setup_ap_jump_table(struct real_mode_header
*rmh)
return 0;
}
+int __init sev_es_efi_map_ghcbs(pgd_t *pgd)
+{
+ struct sev_es_runtime_data *data;
+ unsigned long address, pflags;
+ int cpu;
+ u64 pfn;
+
+ if (!sev_es_active())
+ return 0;
+
+ pflags = _PAGE_NX | _PAGE_RW;
+
+ for_each_possible_cpu(cpu) {
+ data = per_cpu(runtime_data, cpu);
+
+ address = __pa(&data->ghcb_page);
+ pfn = address >> PAGE_SHIFT;
+
+ if (kernel_map_pages_in_pgd(pgd, pfn, address, 1, pflags))
+ return 1;
+ }
+
+ return 0;
+}
+
static enum es_result vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt)
{
struct pt_regs *regs = ctxt->regs;
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index c5e393f8bb3f..004a18853dd3 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -48,6 +48,7 @@
#include <asm/realmode.h>
#include <asm/time.h>
#include <asm/pgalloc.h>
+#include <asm/sev-es.h>
/*
* We allocate runtime services regions top-down, starting from -4G, i.e.
@@ -239,6 +240,15 @@ int __init efi_setup_page_tables(unsigned long pa_memmap,
unsigned num_pages)
return 1;
}
+ /*
+ * When SEV-ES is active, the GHCB as set by the kernel will be used
+ * by firmware. Create a 1:1 unencrypted mapping for each GHCB.
+ */
+ if (sev_es_efi_map_ghcbs(pgd)) {
+ pr_err("Failed to create 1:1 mapping for the GHCBs!\n");
+ return 1;
+ }
+
/*
* When making calls to the firmware everything needs to be 1:1
* mapped and addressable with 32-bit pointers. Map the kernel
--
2.17.1
On Tue, Apr 28, 2020 at 05:16:13PM +0200, Joerg Roedel wrote:> From: Borislav Petkov <bp at alien8.de> > > I guess we can do that ontop.The proper commit message was: "... to make it more readable. No functional changes." :-) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-Apr-30 16:31 UTC
[PATCH v3 08/75] x86/umip: Factor out instruction decoding
On Tue, Apr 28, 2020 at 05:16:18PM +0200, Joerg Roedel wrote:> +/** > + * insn_decode() - Decode an instruction > + * @regs: Structure with register values as seen when entering kernel mode > + * @insn: Structure to store decoded instruction > + * @buf: Buffer containing the instruction bytes > + * @buf_size: Number of instruction bytes available in buf > + * > + * Decodes the instruction provided in buf and stores the decoding results in > + * insn. Also determines the correct address and operand sizes. > + * > + * Returns: > + * > + * True if instruction was decoded, False otherwise. > + */ > +bool insn_decode(struct pt_regs *regs, struct insn *insn, > + unsigned char buf[MAX_INSN_SIZE], int buf_size)Right, let's have @insn be the first function argument in all those insn-handling functions. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-04 08:46 UTC
[PATCH v3 10/75] x86/insn: Add insn_rep_prefix() helper
On Tue, Apr 28, 2020 at 05:16:20PM +0200, Joerg Roedel wrote:> Subject: Re: [PATCH v3 10/75] x86/insn: Add insn_rep_prefix() helpers/insn_rep_prefix/insn_has_rep_prefix/ -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-04 10:41 UTC
[PATCH v3 12/75] x86/boot/compressed/64: Switch to __KERNEL_CS after GDT is loaded
On Tue, Apr 28, 2020 at 05:16:22PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > When the pre-decompression code loads its first GDT in startup_64, it is > still running on the CS value of the previous GDT. In the case of SEV-ES > this is the EFI GDT. > > To make exception handling work (especially IRET) the CPU needs to > switch to a CS value in the current GDT, so jump to __KERNEL_CS after > the first GDT is loaded. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/boot/compressed/head_64.S | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S > index 4f7e6b84be07..6b11060c3a0f 100644 > --- a/arch/x86/boot/compressed/head_64.S > +++ b/arch/x86/boot/compressed/head_64.S > @@ -393,6 +393,14 @@ SYM_CODE_START(startup_64) > addq %rax, 2(%rax) > lgdt (%rax) > > + /* Reload CS so IRET returns to a CS actually in the GDT */ > + pushq $__KERNEL_CS > + leaq .Lon_kernel_cs(%rip), %rax > + pushq %rax > + lretq > + > +.Lon_kernel_cs: > + > /* > * paging_prepare() sets up the trampoline and checks if we need to > * enable 5-level paging. > --So I'm thinking I should take this one even now on the grounds that it sanitizes CS to something known-good than what was there before and who knows what set it and loaded the kernel...? And that is a good thing in itself. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-04 10:54 UTC
[PATCH v3 13/75] x86/boot/compressed/64: Add IDT Infrastructure
On Tue, Apr 28, 2020 at 05:16:23PM +0200, Joerg Roedel wrote:> diff --git a/arch/x86/boot/compressed/idt_handlers_64.S b/arch/x86/boot/compressed/idt_handlers_64.S > new file mode 100644 > index 000000000000..f86ea872d860 > --- /dev/null > +++ b/arch/x86/boot/compressed/idt_handlers_64.S > @@ -0,0 +1,69 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ > +/* > + * Early IDT handler entry points > + * > + * Copyright (C) 2019 SUSE > + * > + * Author: Joerg Roedel <jroedel at suse.de> > + */ > + > +#include <asm/segment.h> > + > +#include "../../entry/calling.h"Leftover from something? Commenting it out doesn't break the build here. If needed, then we need to lift stuff in a separate header and share it or so. I want to include as less as possible crap from kernel proper and eventually untangle arch/x86/boot/ because include/linux/ definitions are a real pain. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Tom Lendacky
2020-May-06 23:02 UTC
[PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
On 5/6/20 1:08 PM, Mike Stunes wrote:> > >> On Apr 28, 2020, at 8:17 AM, Joerg Roedel <joro at 8bytes.org> wrote: >> >> From: Mike Stunes <mstunes at vmware.com> >> >> To avoid a future VMEXIT for a subsequent CPUID function, cache the >> results returned by CPUID into an xarray. >> >> [tl: coding standard changes, register zero extension] >> >> Signed-off-by: Mike Stunes <mstunes at vmware.com> >> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> >> [ jroedel at suse.de: - Wrapped cache handling into vc_handle_cpuid_cached() >> - Used lower_32_bits() where applicable >> - Moved cache_index out of struct es_em_ctxt ] >> Co-developed-by: Joerg Roedel <jroedel at suse.de> >> Signed-off-by: Joerg Roedel <jroedel at suse.de> >> --- >> arch/x86/kernel/sev-es-shared.c | 12 ++-- >> arch/x86/kernel/sev-es.c | 119 +++++++++++++++++++++++++++++++- >> 2 files changed, 124 insertions(+), 7 deletions(-) >> >> diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c >> index 03095bc7b563..0303834d4811 100644 >> --- a/arch/x86/kernel/sev-es.c >> +++ b/arch/x86/kernel/sev-es.c >> @@ -744,6 +758,91 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb, >> return ret; >> } >> >> +static unsigned long sev_es_get_cpuid_cache_index(struct es_em_ctxt *ctxt) >> +{ >> + unsigned long hi, lo; >> + >> + /* Don't attempt to cache until the xarray is initialized */ >> + if (!sev_es_cpuid_cache_initialized) >> + return ULONG_MAX; >> + >> + lo = lower_32_bits(ctxt->regs->ax); >> + >> + /* >> + * CPUID 0x0000000d requires both RCX and XCR0, so it can't be >> + * cached. >> + */ >> + if (lo == 0x0000000d) >> + return ULONG_MAX; >> + >> + /* >> + * Some callers of CPUID don't always set RCX to zero for CPUID >> + * functions that don't require RCX, which can result in excessive >> + * cached values, so RCX needs to be manually zeroed for use as part >> + * of the cache index. Future CPUID values may need RCX, but since >> + * they can't be known, they must not be cached. >> + */ >> + if (lo > 0x80000020) >> + return ULONG_MAX; > > If the cache is shared across CPUs, do we also need to exclude function 0x1 because it contains the LAPIC ID? (Or is the cache per-CPU?)It's currently not a per-CPU cache, but given what you pointed out, it should be if we're going to keep function 0x1 in there. The question will be how often is that CPUID issued, as that would determine if (not) caching it matters. Or even how often CPUID is issued and whether the xarray lock could be under contention if the cache is not per-CPU. Thanks, Tom>
kernel test robot
2020-May-07 10:51 UTC
[x86/head/64] e5a6f186af: BUG:kernel_hang_in_boot_stage
Greeting,
FYI, we noticed the following commit (built with gcc-7):
commit: e5a6f186afc353e4462a28b4bf127e872e0716b2 ("[PATCH v3 70/75]
x86/head/64: Setup TSS early for secondary CPUs")
url:
https://github.com/0day-ci/linux/commits/Joerg-Roedel/x86-SEV-ES-Guest-Support/20200429-044743
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire
log/backtrace):
+-------------------------------+------------+------------+
| | 8d9d92d58d | e5a6f186af |
+-------------------------------+------------+------------+
| boot_successes | 4 | 0 |
| boot_failures | 0 | 4 |
| BUG:kernel_hang_in_boot_stage | 0 | 4 |
+-------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <lkp at intel.com>
needed_size: 0x0000000002400000
trampoline_32bit: 0x000000000009d000
Decompressing Linux... Parsing ELF... done.
Booting the kernel.
BUG: kernel hang in boot stage
Linux version 5.7.0-rc2-00092-ge5a6f186afc353 #1
Command line: ip=::::vm-snb-ssd-16::dhcp root=/dev/ram0 user=lkp
job=/lkp/jobs/scheduled/vm-snb-ssd-16/boot-1-yocto-x86_64-minimal-20190520.cgz-e5a6f186afc353e4462a28b4bf127e872e0716b2-20200507-6867-rkmir2-3.yaml
ARCH=x86_64 kconfig=x86_64-lkp branch=linux-devel/devel-hourly-2020050609
commit=e5a6f186afc353e4462a28b4bf127e872e0716b2
BOOT_IMAGE=/pkg/linux/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/vmlinuz-5.7.0-rc2-00092-ge5a6f186afc353
max_uptime=600
RESULT_ROOT=/result/boot/1/vm-snb-ssd/yocto-x86_64-minimal-20190520.cgz/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/3
LKP_SERVER=inn selinux=0 debug apic=debug sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1
softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0
drbd.minor_count=8 systemd.log_level=err ignore_loglevel console=tty0
earlyprintk=ttyS0,115200 console=ttyS0,115200 vga=normal rw rcuperf.shutdown=0
watchdog_thresh=60
Elapsed time: 420
To reproduce:
# build kernel
cd linux
cp config-5.7.0-rc2-00092-ge5a6f186afc353 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare
bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in
this email
Thanks,
lkp
-------------- next part --------------
#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 5.7.0-rc2 Kernel Configuration
#
#
# Compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
#
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=70500
CONFIG_LD_VERSION=234000000
CONFIG_CLANG_VERSION=0
CONFIG_CC_CAN_LINK=y
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y
#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_CROSS_MEMORY_ATTACH=y
CONFIG_USELIB=y
# CONFIG_AUDIT is not set
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_GENERIC_IRQ_MIGRATION=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_SIM=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR=y
CONFIG_GENERIC_IRQ_RESERVATION_MODE=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
# end of IRQ subsystem
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_ARCH_CLOCKSOURCE_INIT=y
CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
CONFIG_GENERIC_CMOS_UPDATE=y
#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
# end of Timers subsystem
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_COUNT=y
#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_SCHED_THERMAL_PRESSURE is not set
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting
CONFIG_CPU_ISOLATION=y
#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_TASKS_RCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
# end of RCU Subsystem
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=20
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
#
# Scheduler features
#
# CONFIG_UCLAMP_TASK is not set
# end of Scheduler features
CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y
CONFIG_CC_HAS_INT128=y
CONFIG_ARCH_SUPPORTS_INT128=y
CONFIG_NUMA_BALANCING=y
# CONFIG_NUMA_BALANCING_DEFAULT_ENABLED is not set
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
CONFIG_MEMCG_SWAP=y
CONFIG_MEMCG_SWAP_ENABLED=y
CONFIG_MEMCG_KMEM=y
CONFIG_BLK_CGROUP=y
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
# CONFIG_CFS_BANDWIDTH is not set
# CONFIG_RT_GROUP_SCHED is not set
CONFIG_CGROUP_PIDS=y
CONFIG_CGROUP_RDMA=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_HUGETLB=y
CONFIG_CPUSETS=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_CGROUP_DEVICE=y
# CONFIG_CGROUP_CPUACCT is not set
CONFIG_CGROUP_PERF=y
CONFIG_CGROUP_BPF=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_SOCK_CGROUP_DATA=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_TIME_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_NET_NS=y
CONFIG_CHECKPOINT_RESTORE=y
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
# CONFIG_BOOT_CONFIG is not set
# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_HAVE_UID16=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
CONFIG_BPF=y
CONFIG_EXPERT=y
CONFIG_UID16=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_HAVE_ARCH_USERFAULTFD_WP=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_ABSOLUTE_PERCPU=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_BPF_SYSCALL=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
CONFIG_USERFAULTFD=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_RSEQ=y
# CONFIG_DEBUG_RSEQ is not set
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set
#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
# end of Kernel Performance Events And Counters
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_SLUB_MEMCG_SYSFS_ON is not set
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_SLAB_MERGE_DEFAULT=y
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_SLAB_FREELIST_HARDENED is not set
# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
CONFIG_SLUB_CPU_PARTIAL=y
CONFIG_SYSTEM_DATA_VERIFICATION=y
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
# end of General setup
CONFIG_64BIT=y
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MIN=28
CONFIG_ARCH_MMAP_RND_BITS_MAX=32
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=8
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=16
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_ARCH_HAS_FILTER_PGPROT=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ZONE_DMA32=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_X86_64_SMP=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_PGTABLE_LEVELS=5
CONFIG_CC_HAS_SANE_STACKPROTECTOR=y
#
# Processor type and features
#
CONFIG_ZONE_DMA=y
CONFIG_SMP=y
CONFIG_X86_FEATURE_NAMES=y
# CONFIG_X86_X2APIC is not set
CONFIG_X86_MPPARSE=y
# CONFIG_GOLDFISH is not set
CONFIG_RETPOLINE=y
CONFIG_X86_CPU_RESCTRL=y
CONFIG_X86_EXTENDED_PLATFORM=y
# CONFIG_X86_VSMP is not set
# CONFIG_X86_GOLDFISH is not set
# CONFIG_X86_INTEL_MID is not set
# CONFIG_X86_INTEL_LPSS is not set
# CONFIG_X86_AMD_PLATFORM_DEVICE is not set
# CONFIG_IOSF_MBI is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
CONFIG_HYPERVISOR_GUEST=y
CONFIG_PARAVIRT=y
# CONFIG_PARAVIRT_DEBUG is not set
# CONFIG_PARAVIRT_SPINLOCKS is not set
# CONFIG_XEN is not set
CONFIG_KVM_GUEST=y
CONFIG_ARCH_CPUIDLE_HALTPOLL=y
# CONFIG_PVH is not set
# CONFIG_KVM_DEBUG_FS is not set
# CONFIG_PARAVIRT_TIME_ACCOUNTING is not set
CONFIG_PARAVIRT_CLOCK=y
# CONFIG_JAILHOUSE_GUEST is not set
# CONFIG_ACRN_GUEST is not set
# CONFIG_MK8 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
CONFIG_GENERIC_CPU=y
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=64
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_IA32_FEAT_CTL=y
CONFIG_X86_VMX_FEATURE_NAMES=y
# CONFIG_PROCESSOR_SELECT is not set
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_HYGON=y
CONFIG_CPU_SUP_CENTAUR=y
CONFIG_CPU_SUP_ZHAOXIN=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
CONFIG_GART_IOMMU=y
# CONFIG_MAXSMP is not set
CONFIG_NR_CPUS_RANGE_BEGIN=2
CONFIG_NR_CPUS_RANGE_END=512
CONFIG_NR_CPUS_DEFAULT=64
CONFIG_NR_CPUS=512
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_SCHED_MC_PRIO=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
CONFIG_X86_MCELOG_LEGACY=y
CONFIG_X86_MCE_INTEL=y
# CONFIG_X86_MCE_AMD is not set
CONFIG_X86_MCE_THRESHOLD=y
CONFIG_X86_MCE_INJECT=m
CONFIG_X86_THERMAL_VECTOR=y
#
# Performance monitoring
#
CONFIG_PERF_EVENTS_INTEL_UNCORE=y
CONFIG_PERF_EVENTS_INTEL_RAPL=y
CONFIG_PERF_EVENTS_INTEL_CSTATE=y
# CONFIG_PERF_EVENTS_AMD_POWER is not set
# end of Performance monitoring
CONFIG_X86_16BIT=y
CONFIG_X86_ESPFIX64=y
CONFIG_X86_VSYSCALL_EMULATION=y
CONFIG_X86_IOPL_IOPERM=y
CONFIG_I8K=m
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_AMD=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_X86_5LEVEL=y
CONFIG_X86_DIRECT_GBPAGES=y
# CONFIG_X86_CPA_STATISTICS is not set
# CONFIG_AMD_MEM_ENCRYPT is not set
CONFIG_NUMA=y
CONFIG_AMD_NUMA=y
CONFIG_X86_64_ACPI_NUMA=y
CONFIG_NODES_SPAN_OTHER_NODES=y
# CONFIG_NUMA_EMU is not set
CONFIG_NODES_SHIFT=6
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_DEFAULT=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_MEMORY_PROBE=y
CONFIG_ARCH_PROC_KCORE_TEXT=y
CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
CONFIG_X86_PMEM_LEGACY_DEVICE=y
CONFIG_X86_PMEM_LEGACY=m
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
CONFIG_X86_RESERVE_LOW=64
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_ARCH_RANDOM=y
CONFIG_X86_SMAP=y
CONFIG_X86_UMIP=y
CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS=y
CONFIG_X86_INTEL_TSX_MODE_OFF=y
# CONFIG_X86_INTEL_TSX_MODE_ON is not set
# CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
CONFIG_EFI=y
CONFIG_EFI_STUB=y
# CONFIG_EFI_MIXED is not set
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
# CONFIG_KEXEC_FILE is not set
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC_JUMP=y
CONFIG_PHYSICAL_START=0x1000000
CONFIG_RELOCATABLE=y
# CONFIG_RANDOMIZE_BASE is not set
CONFIG_PHYSICAL_ALIGN=0x1000000
CONFIG_DYNAMIC_MEMORY_LAYOUT=y
CONFIG_HOTPLUG_CPU=y
CONFIG_BOOTPARAM_HOTPLUG_CPU0=y
# CONFIG_DEBUG_HOTPLUG_CPU0 is not set
CONFIG_COMPAT_VDSO=y
CONFIG_LEGACY_VSYSCALL_EMULATE=y
# CONFIG_LEGACY_VSYSCALL_XONLY is not set
# CONFIG_LEGACY_VSYSCALL_NONE is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_MODIFY_LDT_SYSCALL=y
CONFIG_HAVE_LIVEPATCH=y
# CONFIG_LIVEPATCH is not set
# end of Processor type and features
CONFIG_ARCH_HAS_ADD_PAGES=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_USE_PERCPU_NUMA_NODE_ID=y
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK=y
CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
CONFIG_ARCH_ENABLE_THP_MIGRATION=y
#
# Power management and ACPI options
#
CONFIG_ARCH_HIBERNATION_HEADER=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
# CONFIG_SUSPEND_SKIP_SYNC is not set
CONFIG_HIBERNATE_CALLBACKS=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_AUTOSLEEP=y
# CONFIG_PM_WAKELOCKS is not set
CONFIG_PM=y
CONFIG_PM_DEBUG=y
CONFIG_PM_ADVANCED_DEBUG=y
# CONFIG_PM_TEST_SUSPEND is not set
CONFIG_PM_SLEEP_DEBUG=y
# CONFIG_DPM_WATCHDOG is not set
# CONFIG_PM_TRACE_RTC is not set
CONFIG_PM_CLK=y
# CONFIG_WQ_POWER_EFFICIENT_DEFAULT is not set
# CONFIG_ENERGY_MODEL is not set
CONFIG_ARCH_SUPPORTS_ACPI=y
CONFIG_ACPI=y
CONFIG_ACPI_LEGACY_TABLES_LOOKUP=y
CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC=y
CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT=y
# CONFIG_ACPI_DEBUGGER is not set
CONFIG_ACPI_SPCR_TABLE=y
CONFIG_ACPI_LPIT=y
CONFIG_ACPI_SLEEP=y
# CONFIG_ACPI_PROCFS_POWER is not set
CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y
# CONFIG_ACPI_EC_DEBUGFS is not set
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_FAN=y
# CONFIG_ACPI_TAD is not set
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_CPU_FREQ_PSS=y
CONFIG_ACPI_PROCESSOR_CSTATE=y
CONFIG_ACPI_PROCESSOR_IDLE=y
CONFIG_ACPI_CPPC_LIB=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_IPMI=m
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=m
CONFIG_ACPI_THERMAL=m
CONFIG_ARCH_HAS_ACPI_TABLE_UPGRADE=y
CONFIG_ACPI_TABLE_UPGRADE=y
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_CONTAINER=y
# CONFIG_ACPI_HOTPLUG_MEMORY is not set
CONFIG_ACPI_HOTPLUG_IOAPIC=y
# CONFIG_ACPI_SBS is not set
CONFIG_ACPI_HED=y
# CONFIG_ACPI_CUSTOM_METHOD is not set
# CONFIG_ACPI_BGRT is not set
# CONFIG_ACPI_REDUCED_HARDWARE_ONLY is not set
CONFIG_ACPI_NFIT=m
# CONFIG_NFIT_SECURITY_DEBUG is not set
CONFIG_ACPI_NUMA=y
# CONFIG_ACPI_HMAT is not set
CONFIG_HAVE_ACPI_APEI=y
CONFIG_HAVE_ACPI_APEI_NMI=y
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
CONFIG_ACPI_APEI_PCIEAER=y
CONFIG_ACPI_APEI_MEMORY_FAILURE=y
CONFIG_ACPI_APEI_EINJ=y
CONFIG_ACPI_APEI_ERST_DEBUG=y
# CONFIG_DPTF_POWER is not set
CONFIG_ACPI_EXTLOG=m
CONFIG_ACPI_ADXL=y
# CONFIG_PMIC_OPREGION is not set
# CONFIG_ACPI_CONFIGFS is not set
CONFIG_X86_PM_TIMER=y
# CONFIG_SFI is not set
#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y
#
# CPU frequency scaling drivers
#
CONFIG_X86_INTEL_PSTATE=y
CONFIG_X86_PCC_CPUFREQ=m
CONFIG_X86_ACPI_CPUFREQ=m
CONFIG_X86_ACPI_CPUFREQ_CPB=y
CONFIG_X86_POWERNOW_K8=m
# CONFIG_X86_AMD_FREQ_SENSITIVITY is not set
CONFIG_X86_SPEEDSTEP_CENTRINO=m
# CONFIG_X86_P4_CLOCKMOD is not set
#
# shared options
#
# end of CPU Frequency scaling
#
# CPU Idle
#
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
# CONFIG_CPU_IDLE_GOV_TEO is not set
# CONFIG_CPU_IDLE_GOV_HALTPOLL is not set
CONFIG_HALTPOLL_CPUIDLE=y
# end of CPU Idle
CONFIG_INTEL_IDLE=y
# end of Power management and ACPI options
#
# Bus options (PCI etc.)
#
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_MMCONF_FAM10H=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
# CONFIG_ISA_BUS is not set
CONFIG_ISA_DMA_API=y
CONFIG_AMD_NB=y
# CONFIG_X86_SYSFB is not set
# end of Bus options (PCI etc.)
#
# Binary Emulations
#
CONFIG_IA32_EMULATION=y
# CONFIG_X86_X32 is not set
CONFIG_COMPAT_32=y
CONFIG_COMPAT=y
CONFIG_COMPAT_FOR_U64_ALIGNMENT=y
CONFIG_SYSVIPC_COMPAT=y
# end of Binary Emulations
#
# Firmware Drivers
#
CONFIG_EDD=y
# CONFIG_EDD_OFF is not set
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_DMIID=y
# CONFIG_DMI_SYSFS is not set
CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
# CONFIG_ISCSI_IBFT is not set
# CONFIG_FW_CFG_SYSFS is not set
# CONFIG_GOOGLE_FIRMWARE is not set
#
# EFI (Extensible Firmware Interface) Support
#
# CONFIG_EFI_VARS is not set
CONFIG_EFI_ESRT=y
CONFIG_EFI_RUNTIME_MAP=y
# CONFIG_EFI_FAKE_MEMMAP is not set
CONFIG_EFI_RUNTIME_WRAPPERS=y
# CONFIG_EFI_CAPSULE_LOADER is not set
# CONFIG_EFI_TEST is not set
# CONFIG_APPLE_PROPERTIES is not set
# CONFIG_RESET_ATTACK_MITIGATION is not set
# CONFIG_EFI_RCI2_TABLE is not set
# CONFIG_EFI_DISABLE_PCI_DMA is not set
# end of EFI (Extensible Firmware Interface) Support
CONFIG_UEFI_CPER=y
CONFIG_UEFI_CPER_X86=y
CONFIG_EFI_EARLYCON=y
#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers
CONFIG_HAVE_KVM=y
CONFIG_HAVE_KVM_IRQCHIP=y
CONFIG_HAVE_KVM_IRQFD=y
CONFIG_HAVE_KVM_IRQ_ROUTING=y
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_ASYNC_PF=y
CONFIG_HAVE_KVM_MSI=y
CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT=y
CONFIG_KVM_VFIO=y
CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y
CONFIG_KVM_COMPAT=y
CONFIG_HAVE_KVM_IRQ_BYPASS=y
CONFIG_HAVE_KVM_NO_POLL=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
CONFIG_KVM_WERROR=y
CONFIG_KVM_INTEL=y
# CONFIG_KVM_AMD is not set
# CONFIG_KVM_MMU_AUDIT is not set
CONFIG_AS_AVX512=y
CONFIG_AS_SHA1_NI=y
CONFIG_AS_SHA256_NI=y
#
# General architecture-dependent options
#
CONFIG_CRASH_CORE=y
CONFIG_KEXEC_CORE=y
CONFIG_HOTPLUG_SMT=y
# CONFIG_OPROFILE is not set
CONFIG_HAVE_OPROFILE=y
CONFIG_OPROFILE_NMI_TIMER=y
CONFIG_KPROBES=y
# CONFIG_JUMP_LABEL is not set
CONFIG_OPTPROBES=y
CONFIG_KPROBES_ON_FTRACE=y
CONFIG_UPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_KRETPROBES=y
CONFIG_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_HAS_SET_DIRECT_MAP=y
CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_TABLE_FREE=y
CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y
CONFIG_HAVE_CMPXCHG_LOCAL=y
CONFIG_HAVE_CMPXCHG_DOUBLE=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP_FILTER=y
CONFIG_HAVE_ARCH_STACKLEAK=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
CONFIG_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR_STRONG=y
CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOVE_PMD=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD=y
CONFIG_HAVE_ARCH_HUGE_VMAP=y
CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
CONFIG_HAVE_ARCH_SOFT_DIRTY=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_HAVE_EXIT_THREAD=y
CONFIG_ARCH_MMAP_RND_BITS=28
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8
CONFIG_HAVE_ARCH_COMPAT_MMAP_BASES=y
CONFIG_HAVE_COPY_THREAD_TLS=y
CONFIG_HAVE_STACK_VALIDATION=y
CONFIG_HAVE_RELIABLE_STACKTRACE=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_COMPAT_OLD_SIGACTION=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
CONFIG_STRICT_KERNEL_RWX=y
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_STRICT_MODULE_RWX=y
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS=y
CONFIG_ARCH_USE_MEMREMAP_PROT=y
# CONFIG_LOCK_EVENT_COUNTS is not set
CONFIG_ARCH_HAS_MEM_ENCRYPT=y
#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling
CONFIG_HAVE_GCC_PLUGINS=y
# end of General architecture-dependent options
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS is not set
# CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_TRIM_UNUSED_KSYMS is not set
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_SCSI_REQUEST=y
CONFIG_BLK_CGROUP_RWSTAT=y
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_BSGLIB=y
CONFIG_BLK_DEV_INTEGRITY=y
CONFIG_BLK_DEV_INTEGRITY_T10=y
CONFIG_BLK_DEV_ZONED=y
CONFIG_BLK_DEV_THROTTLING=y
# CONFIG_BLK_DEV_THROTTLING_LOW is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_CGROUP_IOLATENCY is not set
# CONFIG_BLK_CGROUP_IOCOST is not set
CONFIG_BLK_DEBUG_FS=y
CONFIG_BLK_DEBUG_FS_ZONED=y
# CONFIG_BLK_SED_OPAL is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
# CONFIG_LDM_PARTITION is not set
CONFIG_SGI_PARTITION=y
# CONFIG_ULTRIX_PARTITION is not set
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
# end of Partition Types
CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y
CONFIG_BLK_MQ_VIRTIO=y
CONFIG_BLK_MQ_RDMA=y
CONFIG_BLK_PM=y
#
# IO Schedulers
#
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
# CONFIG_IOSCHED_BFQ is not set
# end of IO Schedulers
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_PADATA=y
CONFIG_ASN1=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y
CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
CONFIG_QUEUED_RWLOCKS=y
CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE=y
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
CONFIG_FREEZER=y
#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ELFCORE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_BINFMT_SCRIPT=y
CONFIG_BINFMT_MISC=y
CONFIG_COREDUMP=y
# end of Executable file formats
#
# Memory Management options
#
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_SPARSEMEM_MANUAL=y
CONFIG_SPARSEMEM=y
CONFIG_NEED_MULTIPLE_NODES=y
CONFIG_HAVE_MEMORY_PRESENT=y
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_SPARSEMEM_VMEMMAP=y
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
CONFIG_HAVE_FAST_GUP=y
CONFIG_NUMA_KEEP_MEMINFO=y
CONFIG_MEMORY_ISOLATION=y
CONFIG_HAVE_BOOTMEM_INFO_NODE=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
# CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_MEMORY_BALLOON=y
CONFIG_BALLOON_COMPACTION=y
CONFIG_COMPACTION=y
CONFIG_PAGE_REPORTING=y
CONFIG_MIGRATION=y
CONFIG_CONTIG_ALLOC=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
CONFIG_MEMORY_FAILURE=y
CONFIG_HWPOISON_INJECT=m
CONFIG_TRANSPARENT_HUGEPAGE=y
# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
CONFIG_ARCH_WANTS_THP_SWAP=y
CONFIG_THP_SWAP=y
# CONFIG_CLEANCACHE is not set
# CONFIG_FRONTSWAP is not set
CONFIG_CMA=y
# CONFIG_CMA_DEBUG is not set
# CONFIG_CMA_DEBUGFS is not set
CONFIG_CMA_AREAS=7
# CONFIG_MEM_SOFT_DIRTY is not set
# CONFIG_ZPOOL is not set
# CONFIG_ZBUD is not set
# CONFIG_ZSMALLOC is not set
CONFIG_GENERIC_EARLY_IOREMAP=y
# CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set
CONFIG_IDLE_PAGE_TRACKING=y
CONFIG_ARCH_HAS_PTE_DEVMAP=y
CONFIG_ZONE_DEVICE=y
CONFIG_DEV_PAGEMAP_OPS=y
# CONFIG_DEVICE_PRIVATE is not set
CONFIG_ARCH_USES_HIGH_VMA_FLAGS=y
CONFIG_ARCH_HAS_PKEYS=y
# CONFIG_PERCPU_STATS is not set
CONFIG_GUP_BENCHMARK=y
# CONFIG_READ_ONLY_THP_FOR_FS is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
# end of Memory Management options
CONFIG_NET=y
CONFIG_COMPAT_NETLINK_MESSAGES=y
CONFIG_SKB_EXTENSIONS=y
#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=m
CONFIG_UNIX=y
CONFIG_UNIX_SCM=y
CONFIG_UNIX_DIAG=m
# CONFIG_TLS is not set
CONFIG_XFRM=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_INTERFACE is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
# CONFIG_SMC is not set
# CONFIG_XDP_SOCKETS is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
CONFIG_NET_IP_TUNNEL=y
CONFIG_IP_MROUTE_COMMON=y
CONFIG_IP_MROUTE=y
# CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
# CONFIG_NET_IPVTI is not set
CONFIG_NET_UDP_TUNNEL=y
CONFIG_NET_FOU=y
CONFIG_NET_FOU_IP_TUNNELS=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
CONFIG_INET_TUNNEL=y
# CONFIG_INET_DIAG is not set
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=y
# CONFIG_TCP_CONG_CUBIC is not set
# CONFIG_TCP_CONG_WESTWOOD is not set
# CONFIG_TCP_CONG_HTCP is not set
# CONFIG_TCP_CONG_HSTCP is not set
# CONFIG_TCP_CONG_HYBLA is not set
# CONFIG_TCP_CONG_VEGAS is not set
# CONFIG_TCP_CONG_NV is not set
# CONFIG_TCP_CONG_SCALABLE is not set
# CONFIG_TCP_CONG_LP is not set
# CONFIG_TCP_CONG_VENO is not set
# CONFIG_TCP_CONG_YEAH is not set
# CONFIG_TCP_CONG_ILLINOIS is not set
# CONFIG_TCP_CONG_DCTCP is not set
# CONFIG_TCP_CONG_CDG is not set
# CONFIG_TCP_CONG_BBR is not set
CONFIG_DEFAULT_BIC=y
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="bic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=y
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
CONFIG_INET6_TUNNEL=y
CONFIG_IPV6_VTI=m
CONFIG_IPV6_SIT=y
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
CONFIG_IPV6_TUNNEL=y
CONFIG_IPV6_FOU=y
CONFIG_IPV6_FOU_TUNNEL=y
CONFIG_IPV6_MULTIPLE_TABLES=y
# CONFIG_IPV6_SUBTREES is not set
# CONFIG_IPV6_MROUTE is not set
CONFIG_IPV6_SEG6_LWTUNNEL=y
# CONFIG_IPV6_SEG6_HMAC is not set
CONFIG_IPV6_SEG6_BPF=y
# CONFIG_IPV6_RPL_LWTUNNEL is not set
CONFIG_MPTCP=y
CONFIG_MPTCP_IPV6=y
# CONFIG_MPTCP_HMAC_TEST is not set
CONFIG_NETWORK_SECMARK=y
CONFIG_NET_PTP_CLASSIFY=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_BPFILTER is not set
CONFIG_IP_DCCP=y
#
# DCCP CCIDs Configuration
#
# CONFIG_IP_DCCP_CCID2_DEBUG is not set
CONFIG_IP_DCCP_CCID3=y
# CONFIG_IP_DCCP_CCID3_DEBUG is not set
CONFIG_IP_DCCP_TFRC_LIB=y
# end of DCCP CCIDs Configuration
#
# DCCP Kernel Hacking
#
# CONFIG_IP_DCCP_DEBUG is not set
# end of DCCP Kernel Hacking
CONFIG_IP_SCTP=y
# CONFIG_SCTP_DBG_OBJCNT is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1 is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_COOKIE_HMAC_SHA1 is not set
# CONFIG_RDS is not set
CONFIG_TIPC=y
# CONFIG_TIPC_MEDIA_IB is not set
CONFIG_TIPC_MEDIA_UDP=y
CONFIG_TIPC_CRYPTO=y
CONFIG_TIPC_DIAG=y
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
CONFIG_HAVE_NET_DSA=y
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=y
# CONFIG_VLAN_8021Q_GVRP is not set
# CONFIG_VLAN_8021Q_MVRP is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_6LOWPAN is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETLINK_DIAG is not set
# CONFIG_MPLS is not set
# CONFIG_NET_NSH is not set
# CONFIG_HSR is not set
# CONFIG_NET_SWITCHDEV is not set
CONFIG_NET_L3_MASTER_DEV=y
# CONFIG_NET_NCSI is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
# CONFIG_CGROUP_NET_PRIO is not set
# CONFIG_CGROUP_NET_CLASSID is not set
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
# CONFIG_BPF_JIT is not set
CONFIG_BPF_STREAM_PARSER=y
CONFIG_NET_FLOW_LIMIT=y
#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_DROP_MONITOR is not set
# end of Network testing
# end of Networking options
# CONFIG_HAMRADIO is not set
CONFIG_CAN=m
CONFIG_CAN_RAW=m
CONFIG_CAN_BCM=m
CONFIG_CAN_GW=m
# CONFIG_CAN_J1939 is not set
#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=m
# CONFIG_CAN_VXCAN is not set
# CONFIG_CAN_SLCAN is not set
CONFIG_CAN_DEV=m
CONFIG_CAN_CALC_BITTIMING=y
# CONFIG_CAN_KVASER_PCIEFD is not set
# CONFIG_CAN_C_CAN is not set
# CONFIG_CAN_CC770 is not set
# CONFIG_CAN_IFI_CANFD is not set
# CONFIG_CAN_M_CAN is not set
# CONFIG_CAN_PEAK_PCIEFD is not set
# CONFIG_CAN_SJA1000 is not set
# CONFIG_CAN_SOFTING is not set
#
# CAN USB interfaces
#
# CONFIG_CAN_8DEV_USB is not set
# CONFIG_CAN_EMS_USB is not set
# CONFIG_CAN_ESD_USB2 is not set
# CONFIG_CAN_GS_USB is not set
# CONFIG_CAN_KVASER_USB is not set
# CONFIG_CAN_MCBA_USB is not set
# CONFIG_CAN_PEAK_USB is not set
# CONFIG_CAN_UCAN is not set
# end of CAN USB interfaces
# CONFIG_CAN_DEBUG_DEVICES is not set
# end of CAN Device Drivers
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
CONFIG_STREAM_PARSER=y
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_CFG80211=m
# CONFIG_NL80211_TESTMODE is not set
# CONFIG_CFG80211_DEVELOPER_WARNINGS is not set
# CONFIG_CFG80211_CERTIFICATION_ONUS is not set
CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
# CONFIG_CFG80211_DEBUGFS is not set
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
CONFIG_NET_9P=y
CONFIG_NET_9P_VIRTIO=y
# CONFIG_NET_9P_RDMA is not set
# CONFIG_NET_9P_DEBUG is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
# CONFIG_PSAMPLE is not set
# CONFIG_NET_IFE is not set
CONFIG_LWTUNNEL=y
CONFIG_LWTUNNEL_BPF=y
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
CONFIG_NET_SOCK_MSG=y
CONFIG_NET_DEVLINK=y
CONFIG_FAILOVER=y
CONFIG_ETHTOOL_NETLINK=y
CONFIG_HAVE_EBPF_JIT=y
#
# Device Drivers
#
CONFIG_HAVE_EISA=y
# CONFIG_EISA is not set
CONFIG_HAVE_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
# CONFIG_PCIEAER_INJECT is not set
# CONFIG_PCIE_ECRC is not set
CONFIG_PCIEASPM=y
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
CONFIG_PCIE_PME=y
# CONFIG_PCIE_DPC is not set
# CONFIG_PCIE_PTM is not set
# CONFIG_PCIE_BW is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_MSI_IRQ_DOMAIN=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_DEBUG is not set
CONFIG_PCI_REALLOC_ENABLE_AUTO=y
CONFIG_PCI_STUB=m
# CONFIG_PCI_PF_STUB is not set
CONFIG_PCI_ATS=y
CONFIG_PCI_LOCKLESS_CONFIG=y
CONFIG_PCI_IOV=y
CONFIG_PCI_PRI=y
CONFIG_PCI_PASID=y
# CONFIG_PCI_P2PDMA is not set
CONFIG_PCI_LABEL=y
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
# CONFIG_HOTPLUG_PCI_ACPI_IBM is not set
# CONFIG_HOTPLUG_PCI_CPCI is not set
# CONFIG_HOTPLUG_PCI_SHPC is not set
#
# PCI controller drivers
#
# CONFIG_VMD is not set
#
# DesignWare PCI Core Support
#
# CONFIG_PCIE_DW_PLAT_HOST is not set
# CONFIG_PCI_MESON is not set
# end of DesignWare PCI Core Support
#
# Mobiveil PCIe Core Support
#
# end of Mobiveil PCIe Core Support
#
# Cadence PCIe controllers support
#
# end of Cadence PCIe controllers support
# end of PCI controller drivers
#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set
# end of PCI Endpoint
#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# end of PCI switch controller drivers
CONFIG_PCCARD=y
CONFIG_PCMCIA=y
CONFIG_PCMCIA_LOAD_CIS=y
CONFIG_CARDBUS=y
#
# PC-card bridges
#
CONFIG_YENTA=y
CONFIG_YENTA_O2=y
CONFIG_YENTA_RICOH=y
CONFIG_YENTA_TI=y
CONFIG_YENTA_ENE_TUNE=y
CONFIG_YENTA_TOSHIBA=y
# CONFIG_PD6729 is not set
# CONFIG_I82092 is not set
CONFIG_PCCARD_NONSTATIC=y
# CONFIG_RAPIDIO is not set
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
# CONFIG_DEVTMPFS_MOUNT is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_FW_LOADER_PAGED_BUF=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_FW_LOADER_USER_HELPER=y
CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y
# CONFIG_FW_LOADER_COMPRESS is not set
CONFIG_FW_CACHE=y
# end of Firmware loader
CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_CPU_VULNERABILITIES=y
CONFIG_DMA_SHARED_BUFFER=y
# CONFIG_DMA_FENCE_TRACE is not set
# end of Generic Driver Options
#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# end of Bus devices
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_GNSS is not set
# CONFIG_MTD is not set
# CONFIG_OF is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
CONFIG_PNP=y
CONFIG_PNP_DEBUG_MESSAGES=y
#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_NULL_BLK is not set
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_BLK_DEV_UMEM is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
CONFIG_BLK_DEV_NBD=m
# CONFIG_BLK_DEV_SKD is not set
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=16384
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_VIRTIO_BLK=y
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_BLK_DEV_RSXX is not set
#
# NVME Support
#
CONFIG_NVME_CORE=m
CONFIG_BLK_DEV_NVME=m
CONFIG_NVME_MULTIPATH=y
# CONFIG_NVME_HWMON is not set
CONFIG_NVME_FABRICS=m
# CONFIG_NVME_RDMA is not set
# CONFIG_NVME_FC is not set
# CONFIG_NVME_TCP is not set
CONFIG_NVME_TARGET=m
CONFIG_NVME_TARGET_LOOP=m
# CONFIG_NVME_TARGET_RDMA is not set
# CONFIG_NVME_TARGET_FC is not set
# CONFIG_NVME_TARGET_TCP is not set
# end of NVME Support
#
# Misc devices
#
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_SRAM is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_PVPANIC is not set
# CONFIG_C2PORT is not set
#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# end of EEPROM support
# CONFIG_CB710_CORE is not set
#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# end of Texas Instruments shared transport line discipline
# CONFIG_SENSORS_LIS3_I2C is not set
# CONFIG_ALTERA_STAPL is not set
# CONFIG_INTEL_MEI is not set
# CONFIG_INTEL_MEI_ME is not set
# CONFIG_INTEL_MEI_TXE is not set
# CONFIG_VMWARE_VMCI is not set
#
# Intel MIC & related support
#
# CONFIG_INTEL_MIC_BUS is not set
# CONFIG_SCIF_BUS is not set
# CONFIG_VOP_BUS is not set
# end of Intel MIC & related support
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_MISC_ALCOR_PCI is not set
# CONFIG_MISC_RTSX_PCI is not set
# CONFIG_MISC_RTSX_USB is not set
# CONFIG_HABANA_AI is not set
# end of Misc devices
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set
#
# SCSI device support
#
CONFIG_SCSI_MOD=y
CONFIG_RAID_ATTRS=y
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_FC_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=y
CONFIG_SCSI_SAS_ATTRS=y
CONFIG_SCSI_SAS_LIBSAS=y
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SRP_ATTRS=m
# end of SCSI Transports
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
CONFIG_SCSI_ACARD=y
CONFIG_SCSI_AACRAID=y
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=4
CONFIG_AIC7XXX_RESET_DELAY_MS=15000
CONFIG_AIC7XXX_DEBUG_ENABLE=y
CONFIG_AIC7XXX_DEBUG_MASK=0
# CONFIG_AIC7XXX_REG_PRETTY_PRINT is not set
CONFIG_SCSI_AIC79XX=y
CONFIG_AIC79XX_CMDS_PER_DEVICE=4
CONFIG_AIC79XX_RESET_DELAY_MS=15000
CONFIG_AIC79XX_DEBUG_ENABLE=y
CONFIG_AIC79XX_DEBUG_MASK=0
# CONFIG_AIC79XX_REG_PRETTY_PRINT is not set
CONFIG_SCSI_AIC94XX=y
# CONFIG_AIC94XX_DEBUG is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_DPT_I2O is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
CONFIG_MEGARAID_NEWGEN=y
CONFIG_MEGARAID_MM=y
CONFIG_MEGARAID_MAILBOX=y
CONFIG_MEGARAID_LEGACY=y
CONFIG_MEGARAID_SAS=y
CONFIG_SCSI_MPT3SAS=m
CONFIG_SCSI_MPT2SAS_MAX_SGE=128
CONFIG_SCSI_MPT3SAS_MAX_SGE=128
CONFIG_SCSI_MPT2SAS=m
# CONFIG_SCSI_SMARTPQI is not set
# CONFIG_SCSI_UFSHCD is not set
CONFIG_SCSI_HPTIOP=y
CONFIG_SCSI_BUSLOGIC=y
# CONFIG_SCSI_FLASHPOINT is not set
# CONFIG_SCSI_MYRB is not set
# CONFIG_SCSI_MYRS is not set
# CONFIG_VMWARE_PVSCSI is not set
# CONFIG_LIBFC is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_FDOMAIN_PCI is not set
CONFIG_SCSI_GDTH=y
CONFIG_SCSI_ISCI=m
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
CONFIG_SCSI_QLOGIC_1280=y
CONFIG_SCSI_QLA_FC=y
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
CONFIG_SCSI_DEBUG=m
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_BFA_FC is not set
CONFIG_SCSI_VIRTIO=y
# CONFIG_SCSI_CHELSIO_FCOE is not set
# CONFIG_SCSI_LOWLEVEL_PCMCIA is not set
# CONFIG_SCSI_DH is not set
# end of SCSI device support
CONFIG_ATA=y
CONFIG_SATA_HOST=y
CONFIG_PATA_TIMINGS=y
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_FORCE=y
CONFIG_ATA_ACPI=y
# CONFIG_SATA_ZPODD is not set
CONFIG_SATA_PMP=y
#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=y
CONFIG_SATA_MOBILE_LPM_POLICY=0
CONFIG_SATA_AHCI_PLATFORM=m
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
CONFIG_ATA_SFF=y
#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y
#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=y
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_PCMCIA is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_PATA_RZ1000 is not set
#
# Generic fallback / legacy drivers
#
# CONFIG_PATA_ACPI is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
# CONFIG_MD_AUTODETECT is not set
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_MD_MULTIPATH=y
CONFIG_MD_FAULTY=y
CONFIG_BCACHE=y
# CONFIG_BCACHE_DEBUG is not set
# CONFIG_BCACHE_CLOSURES_DEBUG is not set
CONFIG_BLK_DEV_DM_BUILTIN=y
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_BUFIO=y
# CONFIG_DM_DEBUG_BLOCK_MANAGER_LOCKING is not set
CONFIG_DM_BIO_PRISON=y
CONFIG_DM_PERSISTENT_DATA=y
# CONFIG_DM_UNSTRIPED is not set
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
# CONFIG_DM_THIN_PROVISIONING is not set
CONFIG_DM_CACHE=y
CONFIG_DM_CACHE_SMQ=y
# CONFIG_DM_WRITECACHE is not set
# CONFIG_DM_ERA is not set
# CONFIG_DM_CLONE is not set
CONFIG_DM_MIRROR=y
# CONFIG_DM_LOG_USERSPACE is not set
# CONFIG_DM_RAID is not set
CONFIG_DM_ZERO=y
CONFIG_DM_MULTIPATH=y
# CONFIG_DM_MULTIPATH_QL is not set
# CONFIG_DM_MULTIPATH_ST is not set
CONFIG_DM_DELAY=y
# CONFIG_DM_DUST is not set
# CONFIG_DM_INIT is not set
# CONFIG_DM_UEVENT is not set
CONFIG_DM_FLAKEY=y
# CONFIG_DM_VERITY is not set
# CONFIG_DM_SWITCH is not set
CONFIG_DM_LOG_WRITES=m
# CONFIG_DM_INTEGRITY is not set
# CONFIG_DM_ZONED is not set
# CONFIG_TARGET_CORE is not set
CONFIG_FUSION=y
CONFIG_FUSION_SPI=y
CONFIG_FUSION_FC=y
CONFIG_FUSION_SAS=y
CONFIG_FUSION_MAX_SGE=40
CONFIG_FUSION_CTL=y
# CONFIG_FUSION_LOGGING is not set
#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# end of IEEE 1394 (FireWire) support
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_MII=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_WIREGUARD is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_IPVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_GENEVE is not set
# CONFIG_BAREUDP is not set
# CONFIG_GTP is not set
CONFIG_MACSEC=y
CONFIG_NETCONSOLE=m
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_TUN=m
# CONFIG_TUN_VNET_CROSS_LE is not set
CONFIG_VETH=m
CONFIG_VIRTIO_NET=y
# CONFIG_NLMON is not set
CONFIG_NET_VRF=y
# CONFIG_ARCNET is not set
#
# Distributed Switch Architecture drivers
#
# end of Distributed Switch Architecture drivers
CONFIG_ETHERNET=y
CONFIG_MDIO=y
# CONFIG_NET_VENDOR_3COM is not set
CONFIG_NET_VENDOR_ADAPTEC=y
# CONFIG_ADAPTEC_STARFIRE is not set
CONFIG_NET_VENDOR_AGERE=y
# CONFIG_ET131X is not set
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_SLICOSS is not set
CONFIG_NET_VENDOR_ALTEON=y
CONFIG_ACENIC=y
# CONFIG_ACENIC_OMIT_TIGON_I is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
# CONFIG_ENA_ETHERNET is not set
CONFIG_NET_VENDOR_AMD=y
CONFIG_AMD8111_ETH=y
CONFIG_PCNET32=y
# CONFIG_PCMCIA_NMCLAN is not set
# CONFIG_AMD_XGBE is not set
CONFIG_NET_VENDOR_AQUANTIA=y
# CONFIG_AQTION is not set
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ATHEROS=y
CONFIG_ATL2=y
CONFIG_ATL1=y
CONFIG_ATL1E=y
CONFIG_ATL1C=y
# CONFIG_ALX is not set
# CONFIG_NET_VENDOR_AURORA is not set
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
CONFIG_BNX2=y
# CONFIG_CNIC is not set
CONFIG_TIGON3=y
CONFIG_TIGON3_HWMON=y
# CONFIG_BNX2X is not set
# CONFIG_SYSTEMPORT is not set
# CONFIG_BNXT is not set
CONFIG_NET_VENDOR_BROCADE=y
# CONFIG_BNA is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
# CONFIG_THUNDER_NIC_PF is not set
# CONFIG_THUNDER_NIC_VF is not set
# CONFIG_THUNDER_NIC_BGX is not set
# CONFIG_THUNDER_NIC_RGX is not set
CONFIG_CAVIUM_PTP=y
# CONFIG_LIQUIDIO is not set
# CONFIG_LIQUIDIO_VF is not set
CONFIG_NET_VENDOR_CHELSIO=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
CONFIG_NET_VENDOR_CISCO=y
# CONFIG_ENIC is not set
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_CX_ECAT is not set
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_DEC=y
CONFIG_NET_TULIP=y
# CONFIG_DE2104X is not set
CONFIG_TULIP=y
# CONFIG_TULIP_MWI is not set
# CONFIG_TULIP_MMIO is not set
# CONFIG_TULIP_NAPI is not set
CONFIG_DE4X5=y
CONFIG_WINBOND_840=y
CONFIG_DM9102=y
CONFIG_ULI526X=y
# CONFIG_PCMCIA_XIRCOM is not set
CONFIG_NET_VENDOR_DLINK=y
CONFIG_DL2K=y
# CONFIG_SUNDANCE is not set
CONFIG_NET_VENDOR_EMULEX=y
# CONFIG_BE2NET is not set
CONFIG_NET_VENDOR_EZCHIP=y
CONFIG_NET_VENDOR_FUJITSU=y
# CONFIG_PCMCIA_FMVJ18X is not set
CONFIG_NET_VENDOR_GOOGLE=y
# CONFIG_GVE is not set
CONFIG_NET_VENDOR_HUAWEI=y
# CONFIG_HINIC is not set
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
CONFIG_E100=y
CONFIG_E1000=y
CONFIG_E1000E=y
CONFIG_E1000E_HWTS=y
CONFIG_IGB=y
CONFIG_IGB_HWMON=y
# CONFIG_IGBVF is not set
CONFIG_IXGB=y
CONFIG_IXGBE=y
CONFIG_IXGBE_HWMON=y
# CONFIG_IXGBEVF is not set
CONFIG_I40E=y
# CONFIG_I40EVF is not set
# CONFIG_ICE is not set
# CONFIG_FM10K is not set
# CONFIG_IGC is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
CONFIG_SKGE=y
# CONFIG_SKGE_DEBUG is not set
# CONFIG_SKGE_GENESIS is not set
CONFIG_SKY2=y
# CONFIG_SKY2_DEBUG is not set
CONFIG_NET_VENDOR_MELLANOX=y
# CONFIG_MLX4_EN is not set
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
# CONFIG_MLXFW is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8851_MLL is not set
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_LAN743X is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MYRI=y
# CONFIG_MYRI10GE is not set
# CONFIG_FEALNX is not set
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_NATSEMI is not set
# CONFIG_NS83820 is not set
CONFIG_NET_VENDOR_NETERION=y
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
CONFIG_NET_VENDOR_NETRONOME=y
# CONFIG_NFP is not set
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_8390=y
# CONFIG_PCMCIA_AXNET is not set
CONFIG_NE2K_PCI=y
# CONFIG_PCMCIA_PCNET is not set
CONFIG_NET_VENDOR_NVIDIA=y
CONFIG_FORCEDETH=y
CONFIG_NET_VENDOR_OKI=y
# CONFIG_ETHOC is not set
CONFIG_NET_VENDOR_PACKET_ENGINES=y
# CONFIG_HAMACHI is not set
CONFIG_YELLOWFIN=m
CONFIG_NET_VENDOR_PENSANDO=y
# CONFIG_IONIC is not set
CONFIG_NET_VENDOR_QLOGIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_QLCNIC is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_QED is not set
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RDC=y
# CONFIG_R6040 is not set
CONFIG_NET_VENDOR_REALTEK=y
CONFIG_8139CP=y
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
CONFIG_R8169=y
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
# CONFIG_SFC is not set
# CONFIG_SFC_FALCON is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
CONFIG_NET_VENDOR_SIS=y
CONFIG_SIS900=y
# CONFIG_SIS190 is not set
CONFIG_NET_VENDOR_SMSC=y
# CONFIG_PCMCIA_SMC91C92 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SMSC911X is not set
# CONFIG_SMSC9420 is not set
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SUN=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NIU is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_TEHUTI=y
# CONFIG_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TI_CPSW_PHY_SEL is not set
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
CONFIG_VIA_RHINE=y
# CONFIG_VIA_RHINE_MMIO is not set
CONFIG_VIA_VELOCITY=y
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_XILINX_AXI_EMAC is not set
# CONFIG_XILINX_LL_TEMAC is not set
CONFIG_NET_VENDOR_XIRCOM=y
# CONFIG_PCMCIA_XIRC2PS is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_NET_SB1000 is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_BITBANG is not set
# CONFIG_MDIO_MSCC_MIIM is not set
# CONFIG_MDIO_MVUSB is not set
# CONFIG_MDIO_THUNDER is not set
# CONFIG_MDIO_XPCS is not set
CONFIG_PHYLIB=y
#
# MII PHY device drivers
#
# CONFIG_ADIN_PHY is not set
# CONFIG_AMD_PHY is not set
# CONFIG_AQUANTIA_PHY is not set
# CONFIG_AX88796B_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM87XX_PHY is not set
CONFIG_BCM_NET_PHYLIB=y
CONFIG_BROADCOM_PHY=y
# CONFIG_BCM84881_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
# CONFIG_DP83869_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_NXP_TJA11XX_PHY is not set
# CONFIG_QSEMI_PHY is not set
CONFIG_REALTEK_PHY=y
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_TERANETICS_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_XILINX_GMII2RGMII is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
CONFIG_USB_NET_DRIVERS=y
CONFIG_USB_CATC=y
CONFIG_USB_KAWETH=y
CONFIG_USB_PEGASUS=y
CONFIG_USB_RTL8150=y
# CONFIG_USB_RTL8152 is not set
# CONFIG_USB_LAN78XX is not set
CONFIG_USB_USBNET=y
CONFIG_USB_NET_AX8817X=y
CONFIG_USB_NET_AX88179_178A=y
CONFIG_USB_NET_CDCETHER=y
CONFIG_USB_NET_CDC_EEM=y
CONFIG_USB_NET_CDC_NCM=y
# CONFIG_USB_NET_HUAWEI_CDC_NCM is not set
# CONFIG_USB_NET_CDC_MBIM is not set
CONFIG_USB_NET_DM9601=y
# CONFIG_USB_NET_SR9700 is not set
# CONFIG_USB_NET_SR9800 is not set
CONFIG_USB_NET_SMSC75XX=y
CONFIG_USB_NET_SMSC95XX=y
CONFIG_USB_NET_GL620A=y
CONFIG_USB_NET_NET1080=y
CONFIG_USB_NET_PLUSB=y
CONFIG_USB_NET_MCS7830=y
CONFIG_USB_NET_RNDIS_HOST=y
CONFIG_USB_NET_CDC_SUBSET_ENABLE=y
CONFIG_USB_NET_CDC_SUBSET=y
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
CONFIG_USB_EPSON2888=y
CONFIG_USB_KC2190=y
CONFIG_USB_NET_ZAURUS=y
# CONFIG_USB_NET_CX82310_ETH is not set
# CONFIG_USB_NET_KALMIA is not set
# CONFIG_USB_NET_QMI_WWAN is not set
CONFIG_USB_NET_INT51X1=y
CONFIG_USB_IPHETH=y
CONFIG_USB_SIERRA_NET=y
# CONFIG_USB_VL600 is not set
# CONFIG_USB_NET_CH9200 is not set
# CONFIG_USB_NET_AQC111 is not set
CONFIG_WLAN=y
# CONFIG_WIRELESS_WDS is not set
CONFIG_WLAN_VENDOR_ADMTEK=y
# CONFIG_ADM8211 is not set
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K is not set
# CONFIG_ATH5K_PCI is not set
# CONFIG_ATH9K is not set
# CONFIG_ATH9K_HTC is not set
# CONFIG_CARL9170 is not set
# CONFIG_ATH6KL is not set
# CONFIG_AR5523 is not set
# CONFIG_WIL6210 is not set
# CONFIG_ATH10K is not set
# CONFIG_WCN36XX is not set
CONFIG_WLAN_VENDOR_ATMEL=y
# CONFIG_ATMEL is not set
# CONFIG_AT76C50X_USB is not set
CONFIG_WLAN_VENDOR_BROADCOM=y
# CONFIG_B43 is not set
# CONFIG_B43LEGACY is not set
# CONFIG_BRCMSMAC is not set
# CONFIG_BRCMFMAC is not set
CONFIG_WLAN_VENDOR_CISCO=y
# CONFIG_AIRO is not set
# CONFIG_AIRO_CS is not set
CONFIG_WLAN_VENDOR_INTEL=y
# CONFIG_IPW2100 is not set
# CONFIG_IPW2200 is not set
# CONFIG_IWL4965 is not set
# CONFIG_IWL3945 is not set
# CONFIG_IWLWIFI is not set
CONFIG_WLAN_VENDOR_INTERSIL=y
# CONFIG_HOSTAP is not set
# CONFIG_HERMES is not set
# CONFIG_P54_COMMON is not set
# CONFIG_PRISM54 is not set
CONFIG_WLAN_VENDOR_MARVELL=y
# CONFIG_LIBERTAS is not set
# CONFIG_LIBERTAS_THINFIRM is not set
# CONFIG_MWIFIEX is not set
# CONFIG_MWL8K is not set
CONFIG_WLAN_VENDOR_MEDIATEK=y
# CONFIG_MT7601U is not set
# CONFIG_MT76x0U is not set
# CONFIG_MT76x0E is not set
# CONFIG_MT76x2E is not set
# CONFIG_MT76x2U is not set
# CONFIG_MT7603E is not set
# CONFIG_MT7615E is not set
CONFIG_WLAN_VENDOR_RALINK=y
# CONFIG_RT2X00 is not set
CONFIG_WLAN_VENDOR_REALTEK=y
# CONFIG_RTL8180 is not set
# CONFIG_RTL8187 is not set
CONFIG_RTL_CARDS=m
# CONFIG_RTL8192CE is not set
# CONFIG_RTL8192SE is not set
# CONFIG_RTL8192DE is not set
# CONFIG_RTL8723AE is not set
# CONFIG_RTL8723BE is not set
# CONFIG_RTL8188EE is not set
# CONFIG_RTL8192EE is not set
# CONFIG_RTL8821AE is not set
# CONFIG_RTL8192CU is not set
# CONFIG_RTL8XXXU is not set
# CONFIG_RTW88 is not set
CONFIG_WLAN_VENDOR_RSI=y
# CONFIG_RSI_91X is not set
CONFIG_WLAN_VENDOR_ST=y
# CONFIG_CW1200 is not set
CONFIG_WLAN_VENDOR_TI=y
# CONFIG_WL1251 is not set
# CONFIG_WL12XX is not set
# CONFIG_WL18XX is not set
# CONFIG_WLCORE is not set
CONFIG_WLAN_VENDOR_ZYDAS=y
# CONFIG_USB_ZD1201 is not set
# CONFIG_ZD1211RW is not set
CONFIG_WLAN_VENDOR_QUANTENNA=y
# CONFIG_QTNFMAC_PCIE is not set
# CONFIG_PCMCIA_RAYCS is not set
# CONFIG_PCMCIA_WL3501 is not set
CONFIG_MAC80211_HWSIM=m
# CONFIG_USB_NET_RNDIS_WLAN is not set
# CONFIG_VIRT_WIFI is not set
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_VMXNET3 is not set
# CONFIG_FUJITSU_ES is not set
CONFIG_NETDEVSIM=m
CONFIG_NET_FAILOVER=y
# CONFIG_ISDN is not set
CONFIG_NVM=y
# CONFIG_NVM_PBLK is not set
#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=y
# CONFIG_INPUT_POLLDEV is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1050 is not set
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_DLINK_DIR685 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_GPIO_POLLED is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_TCA8418 is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_KEYBOARD_LM8333 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_SAMSUNG is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_BYD=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y
CONFIG_MOUSE_PS2_CYPRESS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
CONFIG_MOUSE_PS2_FOCALTECH=y
# CONFIG_MOUSE_PS2_VMMOUSE is not set
CONFIG_MOUSE_PS2_SMBUS=y
CONFIG_MOUSE_SERIAL=y
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_CYAPA is not set
# CONFIG_MOUSE_ELAN_I2C is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_GPIO is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
# CONFIG_MOUSE_SYNAPTICS_USB is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
# CONFIG_INPUT_AD714X is not set
# CONFIG_INPUT_BMA150 is not set
# CONFIG_INPUT_E3X0_BUTTON is not set
# CONFIG_INPUT_MSM_VIBRATOR is not set
# CONFIG_INPUT_PCSPKR is not set
# CONFIG_INPUT_MMA8450 is not set
# CONFIG_INPUT_GP2A is not set
# CONFIG_INPUT_GPIO_BEEPER is not set
# CONFIG_INPUT_GPIO_DECODER is not set
# CONFIG_INPUT_GPIO_VIBRA is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE2 is not set
# CONFIG_INPUT_KEYSPAN_REMOTE is not set
# CONFIG_INPUT_KXTJ9 is not set
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
# CONFIG_INPUT_UINPUT is not set
# CONFIG_INPUT_PCF8574 is not set
# CONFIG_INPUT_GPIO_ROTARY_ENCODER is not set
# CONFIG_INPUT_ADXL34X is not set
# CONFIG_INPUT_CMA3000 is not set
# CONFIG_INPUT_IDEAPAD_SLIDEBAR is not set
# CONFIG_INPUT_DRV260X_HAPTICS is not set
# CONFIG_INPUT_DRV2665_HAPTICS is not set
# CONFIG_INPUT_DRV2667_HAPTICS is not set
# CONFIG_RMI4_CORE is not set
#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_SERIO_ARC_PS2 is not set
# CONFIG_SERIO_GPIO_PS2 is not set
# CONFIG_USERIO is not set
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support
#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_VT_CONSOLE_SLEEP=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_LDISC_AUTOLOAD=y
#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
CONFIG_SERIAL_8250_PNP=y
# CONFIG_SERIAL_8250_16550A_VARIANTS is not set
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
# CONFIG_SERIAL_8250_CS is not set
CONFIG_SERIAL_8250_NR_UARTS=32
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_DWLIB=y
# CONFIG_SERIAL_8250_DW is not set
# CONFIG_SERIAL_8250_RT288X is not set
CONFIG_SERIAL_8250_LPSS=y
CONFIG_SERIAL_8250_MID=y
#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_SPRD is not set
# end of Serial drivers
CONFIG_SERIAL_MCTRL_GPIO=y
CONFIG_SERIAL_NONSTANDARD=y
# CONFIG_ROCKETPORT is not set
# CONFIG_CYCLADES is not set
CONFIG_MOXA_INTELLIO=m
CONFIG_MOXA_SMARTIO=m
# CONFIG_SYNCLINK is not set
# CONFIG_SYNCLINKMP is not set
# CONFIG_SYNCLINK_GT is not set
# CONFIG_ISI is not set
# CONFIG_N_HDLC is not set
# CONFIG_N_GSM is not set
# CONFIG_NOZOMI is not set
# CONFIG_NULL_TTY is not set
# CONFIG_TRACE_SINK is not set
CONFIG_HVC_DRIVER=y
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
CONFIG_VIRTIO_CONSOLE=y
CONFIG_IPMI_HANDLER=m
CONFIG_IPMI_DMI_DECODE=y
CONFIG_IPMI_PLAT_DATA=y
# CONFIG_IPMI_PANIC_EVENT is not set
CONFIG_IPMI_DEVICE_INTERFACE=m
CONFIG_IPMI_SI=m
# CONFIG_IPMI_SSIF is not set
CONFIG_IPMI_WATCHDOG=m
CONFIG_IPMI_POWEROFF=m
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
CONFIG_HW_RANDOM_VIA=y
CONFIG_HW_RANDOM_VIRTIO=y
# CONFIG_APPLICOM is not set
#
# PCMCIA character devices
#
# CONFIG_SYNCLINK_CS is not set
# CONFIG_CARDMAN_4000 is not set
# CONFIG_CARDMAN_4040 is not set
# CONFIG_SCR24X is not set
# CONFIG_IPWIRELESS is not set
# end of PCMCIA character devices
# CONFIG_MWAVE is not set
CONFIG_DEVMEM=y
CONFIG_DEVKMEM=y
CONFIG_NVRAM=y
# CONFIG_RAW_DRIVER is not set
CONFIG_DEVPORT=y
CONFIG_HPET=y
# CONFIG_HPET_MMAP is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
# CONFIG_XILLYBUS is not set
# end of Character devices
# CONFIG_RANDOM_TRUST_CPU is not set
# CONFIG_RANDOM_TRUST_BOOTLOADER is not set
#
# I2C support
#
CONFIG_I2C=y
CONFIG_ACPI_I2C_OPREGION=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
# CONFIG_I2C_CHARDEV is not set
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y
#
# I2C Hardware Bus support
#
#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_AMD_MP2 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_ISMT is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_NVIDIA_GPU is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set
#
# ACPI drivers
#
# CONFIG_I2C_SCMI is not set
#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
# CONFIG_I2C_DESIGNWARE_PLATFORM is not set
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set
#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_ROBOTFUZZ_OSIF is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set
#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_MLXCPLD is not set
# end of I2C Hardware Bus support
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# end of I2C support
# CONFIG_I3C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set
#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
# CONFIG_PPS_CLIENT_LDISC is not set
# CONFIG_PPS_CLIENT_GPIO is not set
#
# PPS generators support
#
#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y
#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
CONFIG_PTP_1588_CLOCK_KVM=y
# CONFIG_PTP_1588_CLOCK_IDT82P33 is not set
# CONFIG_PTP_1588_CLOCK_IDTCM is not set
# CONFIG_PTP_1588_CLOCK_VMW is not set
# end of PTP clock support
# CONFIG_PINCTRL is not set
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_GPIO_ACPI=y
# CONFIG_DEBUG_GPIO is not set
# CONFIG_GPIO_SYSFS is not set
#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_AMDPT is not set
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_EXAR is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_ICH is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_VX855 is not set
# CONFIG_GPIO_XILINX is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers
#
# Port-mapped I/O GPIO drivers
#
# CONFIG_GPIO_F7188X is not set
# CONFIG_GPIO_IT87 is not set
# CONFIG_GPIO_SCH is not set
# CONFIG_GPIO_SCH311X is not set
# CONFIG_GPIO_WINBOND is not set
# CONFIG_GPIO_WS16C48 is not set
# end of Port-mapped I/O GPIO drivers
#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set
# end of I2C GPIO expanders
#
# MFD GPIO expanders
#
# end of MFD GPIO expanders
#
# PCI GPIO expanders
#
# CONFIG_GPIO_AMD8111 is not set
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_ML_IOH is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set
# end of PCI GPIO expanders
#
# USB GPIO expanders
#
# end of USB GPIO expanders
CONFIG_GPIO_MOCKUP=y
# CONFIG_W1 is not set
# CONFIG_POWER_AVS is not set
# CONFIG_POWER_RESET is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
CONFIG_POWER_SUPPLY_HWMON=y
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_CHARGER_ADP5061 is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2781 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_SBS is not set
# CONFIG_CHARGER_SBS is not set
# CONFIG_BATTERY_BQ27XXX is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
# CONFIG_CHARGER_LP8727 is not set
# CONFIG_CHARGER_GPIO is not set
# CONFIG_CHARGER_LT3651 is not set
# CONFIG_CHARGER_BQ2415X is not set
# CONFIG_CHARGER_BQ24735 is not set
# CONFIG_CHARGER_BQ25890 is not set
# CONFIG_CHARGER_SMB347 is not set
# CONFIG_BATTERY_GAUGE_LTC2941 is not set
# CONFIG_CHARGER_RT9455 is not set
CONFIG_HWMON=y
# CONFIG_HWMON_DEBUG_CHIP is not set
#
# Native drivers
#
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM1177 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7410 is not set
# CONFIG_SENSORS_ADT7411 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_AS370 is not set
# CONFIG_SENSORS_ASC7621 is not set
# CONFIG_SENSORS_AXI_FAN_CONTROL is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_K10TEMP is not set
# CONFIG_SENSORS_FAM15H_POWER is not set
# CONFIG_SENSORS_APPLESMC is not set
# CONFIG_SENSORS_ASB100 is not set
# CONFIG_SENSORS_ASPEED is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DRIVETEMP is not set
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
CONFIG_SENSORS_DELL_SMM=m
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_FSCHMD is not set
# CONFIG_SENSORS_FTSTEUTATES is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_G762 is not set
# CONFIG_SENSORS_HIH6130 is not set
# CONFIG_SENSORS_IBMAEM is not set
# CONFIG_SENSORS_IBMPEX is not set
# CONFIG_SENSORS_I5500 is not set
# CONFIG_SENSORS_CORETEMP is not set
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_POWR1220 is not set
# CONFIG_SENSORS_LINEAGE is not set
# CONFIG_SENSORS_LTC2945 is not set
# CONFIG_SENSORS_LTC2947_I2C is not set
# CONFIG_SENSORS_LTC2990 is not set
# CONFIG_SENSORS_LTC4151 is not set
# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4222 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_LTC4260 is not set
# CONFIG_SENSORS_LTC4261 is not set
# CONFIG_SENSORS_MAX16065 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX1668 is not set
# CONFIG_SENSORS_MAX197 is not set
# CONFIG_SENSORS_MAX31730 is not set
# CONFIG_SENSORS_MAX6621 is not set
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6642 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_MAX6697 is not set
# CONFIG_SENSORS_MAX31790 is not set
# CONFIG_SENSORS_MCP3021 is not set
# CONFIG_SENSORS_TC654 is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM73 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LM95234 is not set
# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_LM95245 is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_NTC_THERMISTOR is not set
# CONFIG_SENSORS_NCT6683 is not set
# CONFIG_SENSORS_NCT6775 is not set
# CONFIG_SENSORS_NCT7802 is not set
# CONFIG_SENSORS_NCT7904 is not set
# CONFIG_SENSORS_NPCM7XX is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_PMBUS is not set
# CONFIG_SENSORS_SHT15 is not set
# CONFIG_SENSORS_SHT21 is not set
# CONFIG_SENSORS_SHT3x is not set
# CONFIG_SENSORS_SHTC1 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_EMC1403 is not set
# CONFIG_SENSORS_EMC2103 is not set
# CONFIG_SENSORS_EMC6W201 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_SCH5627 is not set
# CONFIG_SENSORS_SCH5636 is not set
# CONFIG_SENSORS_STTS751 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_ADC128D818 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_AMC6821 is not set
# CONFIG_SENSORS_INA209 is not set
# CONFIG_SENSORS_INA2XX is not set
# CONFIG_SENSORS_INA3221 is not set
# CONFIG_SENSORS_TC74 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_TMP102 is not set
# CONFIG_SENSORS_TMP103 is not set
# CONFIG_SENSORS_TMP108 is not set
# CONFIG_SENSORS_TMP401 is not set
# CONFIG_SENSORS_TMP421 is not set
# CONFIG_SENSORS_TMP513 is not set
# CONFIG_SENSORS_VIA_CPUTEMP is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83773G is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83795 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_XGENE is not set
#
# ACPI drivers
#
# CONFIG_SENSORS_ACPI_POWER is not set
# CONFIG_SENSORS_ATK0110 is not set
CONFIG_THERMAL=y
# CONFIG_THERMAL_STATISTICS is not set
CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS=0
CONFIG_THERMAL_HWMON=y
CONFIG_THERMAL_WRITABLE_TRIPS=y
CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE=y
# CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE is not set
# CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE is not set
# CONFIG_THERMAL_GOV_FAIR_SHARE is not set
CONFIG_THERMAL_GOV_STEP_WISE=y
# CONFIG_THERMAL_GOV_BANG_BANG is not set
CONFIG_THERMAL_GOV_USER_SPACE=y
# CONFIG_THERMAL_EMULATION is not set
#
# Intel thermal drivers
#
CONFIG_INTEL_POWERCLAMP=m
CONFIG_X86_PKG_TEMP_THERMAL=m
# CONFIG_INTEL_SOC_DTS_THERMAL is not set
#
# ACPI INT340X thermal drivers
#
# CONFIG_INT340X_THERMAL is not set
# end of ACPI INT340X thermal drivers
# CONFIG_INTEL_PCH_THERMAL is not set
# end of Intel thermal drivers
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED=y
CONFIG_WATCHDOG_OPEN_TIMEOUT=0
# CONFIG_WATCHDOG_SYSFS is not set
#
# Watchdog Pretimeout Governors
#
# CONFIG_WATCHDOG_PRETIMEOUT_GOV is not set
#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=y
# CONFIG_WDAT_WDT is not set
# CONFIG_XILINX_WATCHDOG is not set
# CONFIG_ZIIRAVE_WATCHDOG is not set
# CONFIG_CADENCE_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
# CONFIG_ACQUIRE_WDT is not set
# CONFIG_ADVANTECH_WDT is not set
# CONFIG_ALIM1535_WDT is not set
# CONFIG_ALIM7101_WDT is not set
# CONFIG_EBC_C384_WDT is not set
# CONFIG_F71808E_WDT is not set
# CONFIG_SP5100_TCO is not set
# CONFIG_SBC_FITPC2_WATCHDOG is not set
# CONFIG_EUROTECH_WDT is not set
# CONFIG_IB700_WDT is not set
# CONFIG_IBMASR is not set
# CONFIG_WAFER_WDT is not set
CONFIG_I6300ESB_WDT=y
# CONFIG_IE6XX_WDT is not set
CONFIG_ITCO_WDT=y
CONFIG_ITCO_VENDOR_SUPPORT=y
# CONFIG_IT8712F_WDT is not set
# CONFIG_IT87_WDT is not set
# CONFIG_HP_WATCHDOG is not set
# CONFIG_SC1200_WDT is not set
# CONFIG_PC87413_WDT is not set
# CONFIG_NV_TCO is not set
# CONFIG_60XX_WDT is not set
# CONFIG_CPU5_WDT is not set
# CONFIG_SMSC_SCH311X_WDT is not set
# CONFIG_SMSC37B787_WDT is not set
# CONFIG_TQMX86_WDT is not set
# CONFIG_VIA_WDT is not set
# CONFIG_W83627HF_WDT is not set
# CONFIG_W83877F_WDT is not set
# CONFIG_W83977F_WDT is not set
# CONFIG_MACHZ_WDT is not set
# CONFIG_SBC_EPX_C3_WATCHDOG is not set
# CONFIG_NI903X_WDT is not set
# CONFIG_NIC7018_WDT is not set
# CONFIG_MEN_A21_WDT is not set
#
# PCI-based Watchdog Cards
#
# CONFIG_PCIPCWATCHDOG is not set
# CONFIG_WDTPCI is not set
#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set
#
# Multifunction device drivers
#
CONFIG_MFD_CORE=y
# CONFIG_MFD_AS3711 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_DLN2 is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_MFD_INTEL_QUARK_I2C_GPIO is not set
CONFIG_LPC_ICH=y
# CONFIG_LPC_SCH is not set
# CONFIG_INTEL_SOC_PMIC_CHTDC_TI is not set
# CONFIG_MFD_INTEL_LPSS_ACPI is not set
# CONFIG_MFD_INTEL_LPSS_PCI is not set
# CONFIG_MFD_IQS62X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_MFD_VIPERBOARD is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_SEC_CORE is not set
# CONFIG_MFD_SI476X_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SKY81452 is not set
# CONFIG_MFD_SMSC is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_TQMX86 is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# end of Multifunction device drivers
# CONFIG_REGULATOR is not set
CONFIG_RC_CORE=m
CONFIG_RC_MAP=m
CONFIG_LIRC=y
CONFIG_RC_DECODERS=y
# CONFIG_IR_NEC_DECODER is not set
# CONFIG_IR_RC5_DECODER is not set
# CONFIG_IR_RC6_DECODER is not set
# CONFIG_IR_JVC_DECODER is not set
# CONFIG_IR_SONY_DECODER is not set
# CONFIG_IR_SANYO_DECODER is not set
CONFIG_IR_SHARP_DECODER=m
# CONFIG_IR_MCE_KBD_DECODER is not set
# CONFIG_IR_XMP_DECODER is not set
CONFIG_IR_IMON_DECODER=m
# CONFIG_IR_RCMM_DECODER is not set
CONFIG_RC_DEVICES=y
# CONFIG_RC_ATI_REMOTE is not set
# CONFIG_IR_ENE is not set
# CONFIG_IR_IMON is not set
# CONFIG_IR_IMON_RAW is not set
# CONFIG_IR_MCEUSB is not set
# CONFIG_IR_ITE_CIR is not set
# CONFIG_IR_FINTEK is not set
# CONFIG_IR_NUVOTON is not set
# CONFIG_IR_REDRAT3 is not set
# CONFIG_IR_STREAMZAP is not set
# CONFIG_IR_WINBOND_CIR is not set
# CONFIG_IR_IGORPLUGUSB is not set
# CONFIG_IR_IGUANA is not set
# CONFIG_IR_TTUSBIR is not set
CONFIG_RC_LOOPBACK=m
# CONFIG_IR_SERIAL is not set
# CONFIG_IR_SIR is not set
# CONFIG_RC_XBOX_DVD is not set
# CONFIG_MEDIA_SUPPORT is not set
#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_VGA_SWITCHEROO is not set
# CONFIG_DRM is not set
#
# ARM devices
#
# end of ARM devices
#
# Frame buffer Devices
#
# CONFIG_FB is not set
# end of Frame buffer Devices
#
# Backlight & LCD device support
#
# CONFIG_LCD_CLASS_DEVICE is not set
# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
# end of Backlight & LCD device support
#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
# CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# end of Console display driver support
# end of Graphics support
# CONFIG_SOUND is not set
#
# HID support
#
CONFIG_HID=y
CONFIG_HID_BATTERY_STRENGTH=y
# CONFIG_HIDRAW is not set
# CONFIG_UHID is not set
CONFIG_HID_GENERIC=y
#
# Special HID drivers
#
CONFIG_HID_A4TECH=y
# CONFIG_HID_ACCUTOUCH is not set
# CONFIG_HID_ACRUX is not set
CONFIG_HID_APPLE=y
# CONFIG_HID_APPLEIR is not set
# CONFIG_HID_AUREAL is not set
CONFIG_HID_BELKIN=y
# CONFIG_HID_BETOP_FF is not set
CONFIG_HID_CHERRY=y
CONFIG_HID_CHICONY=y
# CONFIG_HID_COUGAR is not set
# CONFIG_HID_MACALLY is not set
# CONFIG_HID_CMEDIA is not set
# CONFIG_HID_CREATIVE_SB0540 is not set
CONFIG_HID_CYPRESS=y
CONFIG_HID_DRAGONRISE=y
# CONFIG_DRAGONRISE_FF is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_ELECOM is not set
# CONFIG_HID_ELO is not set
CONFIG_HID_EZKEY=y
# CONFIG_HID_GEMBIRD is not set
# CONFIG_HID_GFRM is not set
# CONFIG_HID_GLORIOUS is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
CONFIG_HID_KYE=y
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_VIEWSONIC is not set
CONFIG_HID_GYRATION=y
# CONFIG_HID_ICADE is not set
# CONFIG_HID_ITE is not set
# CONFIG_HID_JABRA is not set
CONFIG_HID_TWINHAN=y
CONFIG_HID_KENSINGTON=y
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LENOVO is not set
# CONFIG_HID_MAGICMOUSE is not set
# CONFIG_HID_MALTRON is not set
# CONFIG_HID_MAYFLASH is not set
# CONFIG_HID_REDRAGON is not set
CONFIG_HID_MICROSOFT=y
CONFIG_HID_MONTEREY=y
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTI is not set
CONFIG_HID_NTRIG=y
CONFIG_HID_ORTEK=y
CONFIG_HID_PANTHERLORD=y
# CONFIG_PANTHERLORD_FF is not set
# CONFIG_HID_PENMOUNT is not set
CONFIG_HID_PETALYNX=y
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_PLANTRONICS is not set
# CONFIG_HID_PRIMAX is not set
# CONFIG_HID_RETRODE is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_SAITEK is not set
CONFIG_HID_SAMSUNG=y
# CONFIG_HID_SPEEDLINK is not set
# CONFIG_HID_STEAM is not set
# CONFIG_HID_STEELSERIES is not set
CONFIG_HID_SUNPLUS=y
# CONFIG_HID_RMI is not set
CONFIG_HID_GREENASIA=y
# CONFIG_GREENASIA_FF is not set
CONFIG_HID_SMARTJOYPLUS=y
# CONFIG_SMARTJOYPLUS_FF is not set
# CONFIG_HID_TIVO is not set
CONFIG_HID_TOPSEED=y
CONFIG_HID_THRUSTMASTER=y
CONFIG_THRUSTMASTER_FF=y
# CONFIG_HID_UDRAW_PS3 is not set
# CONFIG_HID_WACOM is not set
# CONFIG_HID_XINMO is not set
CONFIG_HID_ZEROPLUS=y
# CONFIG_ZEROPLUS_FF is not set
# CONFIG_HID_ZYDACRON is not set
# CONFIG_HID_SENSOR_HUB is not set
# CONFIG_HID_ALPS is not set
# CONFIG_HID_MCP2221 is not set
# end of Special HID drivers
#
# USB HID support
#
CONFIG_USB_HID=y
CONFIG_HID_PID=y
CONFIG_USB_HIDDEV=y
# end of USB HID support
#
# I2C HID support
#
# CONFIG_I2C_HID is not set
# end of I2C HID support
#
# Intel ISH HID support
#
# CONFIG_INTEL_ISH_HID is not set
# end of Intel ISH HID support
# end of HID support
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
# CONFIG_USB_ULPI_BUS is not set
# CONFIG_USB_CONN_GPIO is not set
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_PCI=y
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set
#
# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
CONFIG_USB_AUTOSUSPEND_DELAY=2
CONFIG_USB_MON=y
#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_PCI=y
# CONFIG_USB_EHCI_FSL is not set
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_FOTG210_HCD is not set
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PCI=y
# CONFIG_USB_OHCI_HCD_PLATFORM is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HCD_TEST_MODE is not set
#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set
#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
CONFIG_USB_STORAGE_USBAT=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_STORAGE_ALAUDA=y
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set
#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_USB_CDNS3 is not set
# CONFIG_USB_MUSB_HDRC is not set
# CONFIG_USB_DWC3 is not set
# CONFIG_USB_DWC2 is not set
# CONFIG_USB_CHIPIDEA is not set
# CONFIG_USB_ISP1760 is not set
#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set
#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_APPLE_MFI_FASTCHARGE is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
CONFIG_USB_TEST=y
# CONFIG_USB_EHSET_TEST_FIXTURE is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_EZUSB_FX2 is not set
# CONFIG_USB_HUB_USB251XB is not set
# CONFIG_USB_HSIC_USB3503 is not set
# CONFIG_USB_HSIC_USB4604 is not set
# CONFIG_USB_LINK_LAYER_TEST is not set
# CONFIG_USB_CHAOSKEY is not set
#
# USB Physical Layer drivers
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ISP1301 is not set
# end of USB Physical Layer drivers
# CONFIG_USB_GADGET is not set
# CONFIG_TYPEC is not set
# CONFIG_USB_ROLE_SWITCH is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_INFINIBAND=m
CONFIG_INFINIBAND_USER_MAD=m
CONFIG_INFINIBAND_USER_ACCESS=m
# CONFIG_INFINIBAND_EXP_LEGACY_VERBS_NEW_UAPI is not set
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ON_DEMAND_PAGING=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS=y
# CONFIG_INFINIBAND_MTHCA is not set
# CONFIG_INFINIBAND_EFA is not set
# CONFIG_INFINIBAND_I40IW is not set
# CONFIG_MLX4_INFINIBAND is not set
# CONFIG_INFINIBAND_OCRDMA is not set
# CONFIG_INFINIBAND_RDMAVT is not set
CONFIG_RDMA_RXE=m
CONFIG_RDMA_SIW=m
CONFIG_INFINIBAND_IPOIB=m
# CONFIG_INFINIBAND_IPOIB_CM is not set
CONFIG_INFINIBAND_IPOIB_DEBUG=y
# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
CONFIG_INFINIBAND_SRP=m
# CONFIG_INFINIBAND_ISER is not set
# CONFIG_INFINIBAND_OPA_VNIC is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EDAC=y
CONFIG_EDAC_LEGACY_SYSFS=y
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_GHES=y
CONFIG_EDAC_E752X=y
# CONFIG_EDAC_I82975X is not set
# CONFIG_EDAC_I3000 is not set
# CONFIG_EDAC_I3200 is not set
# CONFIG_EDAC_IE31200 is not set
# CONFIG_EDAC_X38 is not set
# CONFIG_EDAC_I5400 is not set
CONFIG_EDAC_I7CORE=m
# CONFIG_EDAC_I5000 is not set
# CONFIG_EDAC_I5100 is not set
# CONFIG_EDAC_I7300 is not set
CONFIG_EDAC_SBRIDGE=m
CONFIG_EDAC_SKX=m
# CONFIG_EDAC_I10NM is not set
# CONFIG_EDAC_PND2 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_SYSTOHC=y
CONFIG_RTC_SYSTOHC_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_NVMEM=y
#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set
#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABEOZ9 is not set
# CONFIG_RTC_DRV_ABX80X is not set
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8523 is not set
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8010 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3028 is not set
# CONFIG_RTC_DRV_RV8803 is not set
# CONFIG_RTC_DRV_SD3078 is not set
#
# SPI RTC drivers
#
CONFIG_RTC_I2C_AND_SPI=y
#
# SPI and I2C RTC drivers
#
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_PCF2127 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set
#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_DS2404 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set
#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_FTRTC010 is not set
#
# HID Sensor RTC drivers
#
# CONFIG_DMADEVICES is not set
#
# DMABUF options
#
CONFIG_SYNC_FILE=y
CONFIG_SW_SYNC=y
# CONFIG_UDMABUF is not set
# CONFIG_DMABUF_MOVE_NOTIFY is not set
# CONFIG_DMABUF_SELFTESTS is not set
# CONFIG_DMABUF_HEAPS is not set
# end of DMABUF options
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
CONFIG_IRQ_BYPASS_MANAGER=y
# CONFIG_VIRT_DRIVERS is not set
CONFIG_VIRTIO=y
CONFIG_VIRTIO_MENU=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_PCI_LEGACY=y
# CONFIG_VIRTIO_VDPA is not set
# CONFIG_VIRTIO_PMEM is not set
CONFIG_VIRTIO_BALLOON=y
# CONFIG_VIRTIO_INPUT is not set
CONFIG_VIRTIO_MMIO=y
# CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES is not set
# CONFIG_VDPA_MENU is not set
CONFIG_VHOST_IOTLB=m
CONFIG_VHOST=m
CONFIG_VHOST_MENU=y
CONFIG_VHOST_NET=m
# CONFIG_VHOST_VDPA is not set
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
#
# Microsoft Hyper-V guest support
#
# CONFIG_HYPERV is not set
# end of Microsoft Hyper-V guest support
# CONFIG_GREYBUS is not set
CONFIG_STAGING=y
# CONFIG_PRISM2_USB is not set
# CONFIG_COMEDI is not set
# CONFIG_RTL8192U is not set
# CONFIG_RTLLIB is not set
# CONFIG_R8712U is not set
# CONFIG_R8188EU is not set
# CONFIG_RTS5208 is not set
# CONFIG_VT6655 is not set
# CONFIG_VT6656 is not set
#
# Speakup console speech
#
# CONFIG_SPEAKUP is not set
# end of Speakup console speech
# CONFIG_STAGING_MEDIA is not set
#
# Android
#
# CONFIG_ASHMEM is not set
CONFIG_ION=y
CONFIG_ION_SYSTEM_HEAP=y
# CONFIG_ION_CMA_HEAP is not set
# end of Android
# CONFIG_LTE_GDM724X is not set
# CONFIG_GS_FPGABOOT is not set
# CONFIG_UNISYSSPAR is not set
#
# Gasket devices
#
# CONFIG_STAGING_GASKET_FRAMEWORK is not set
# end of Gasket devices
# CONFIG_FIELDBUS_DEV is not set
# CONFIG_QLGE is not set
CONFIG_X86_PLATFORM_DEVICES=y
# CONFIG_ACPI_WMI is not set
# CONFIG_ACERHDF is not set
# CONFIG_ACER_WIRELESS is not set
# CONFIG_ASUS_WIRELESS is not set
CONFIG_DCDBAS=y
# CONFIG_DELL_SMBIOS is not set
CONFIG_DELL_RBU=y
# CONFIG_DELL_SMO8800 is not set
# CONFIG_FUJITSU_TABLET is not set
# CONFIG_GPD_POCKET_FAN is not set
# CONFIG_HP_ACCEL is not set
# CONFIG_HP_WIRELESS is not set
# CONFIG_IBM_RTL is not set
# CONFIG_SENSORS_HDAPS is not set
# CONFIG_INTEL_HID_EVENT is not set
# CONFIG_INTEL_INT0002_VGPIO is not set
# CONFIG_INTEL_MENLOW is not set
# CONFIG_INTEL_VBTN is not set
# CONFIG_SURFACE_3_POWER_OPREGION is not set
# CONFIG_SURFACE_PRO3_BUTTON is not set
# CONFIG_SAMSUNG_Q10 is not set
# CONFIG_TOSHIBA_BT_RFKILL is not set
# CONFIG_TOSHIBA_HAPS is not set
# CONFIG_ACPI_CMPC is not set
# CONFIG_SYSTEM76_ACPI is not set
# CONFIG_TOPSTAR_LAPTOP is not set
# CONFIG_I2C_MULTI_INSTANTIATE is not set
# CONFIG_INTEL_IPS is not set
# CONFIG_INTEL_RST is not set
# CONFIG_INTEL_SMARTCONNECT is not set
#
# Intel Speed Select Technology interface support
#
# CONFIG_INTEL_SPEED_SELECT_INTERFACE is not set
# end of Intel Speed Select Technology interface support
# CONFIG_INTEL_TURBO_MAX_3 is not set
# CONFIG_INTEL_UNCORE_FREQ_CONTROL is not set
# CONFIG_INTEL_PMC_CORE is not set
# CONFIG_INTEL_PMC_IPC is not set
# CONFIG_INTEL_PUNIT_IPC is not set
CONFIG_PMC_ATOM=y
# CONFIG_MFD_CROS_EC is not set
# CONFIG_CHROME_PLATFORMS is not set
# CONFIG_MELLANOX_PLATFORM is not set
CONFIG_CLKDEV_LOOKUP=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y
#
# Common Clock Framework
#
# CONFIG_COMMON_CLK_MAX9485 is not set
# CONFIG_COMMON_CLK_SI5341 is not set
# CONFIG_COMMON_CLK_SI5351 is not set
# CONFIG_COMMON_CLK_SI544 is not set
# CONFIG_COMMON_CLK_CDCE706 is not set
# CONFIG_COMMON_CLK_CS2000_CP is not set
# end of Common Clock Framework
# CONFIG_HWSPINLOCK is not set
#
# Clock Source drivers
#
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
# end of Clock Source drivers
CONFIG_MAILBOX=y
CONFIG_PCC=y
# CONFIG_ALTERA_MBOX is not set
CONFIG_IOMMU_SUPPORT=y
#
# Generic IOMMU Pagetable Support
#
# end of Generic IOMMU Pagetable Support
# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_AMD_IOMMU is not set
# CONFIG_INTEL_IOMMU is not set
# CONFIG_IRQ_REMAP is not set
#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers
#
# Rpmsg drivers
#
# CONFIG_RPMSG_QCOM_GLINK_RPM is not set
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers
# CONFIG_SOUNDWIRE is not set
#
# SOC (System On Chip) specific Drivers
#
#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers
#
# Aspeed SoC drivers
#
# end of Aspeed SoC drivers
#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers
#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers
#
# i.MX SoC drivers
#
# end of i.MX SoC drivers
#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers
# CONFIG_SOC_TI is not set
#
# Xilinx SoC drivers
#
# CONFIG_XILINX_VCU is not set
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers
# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_NTB is not set
# CONFIG_VME_BUS is not set
# CONFIG_PWM is not set
#
# IRQ chip support
#
# end of IRQ chip support
# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set
#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_PHY_INTEL_EMMC is not set
# end of PHY Subsystem
# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
#
# Performance monitor support
#
# end of Performance monitor support
CONFIG_RAS=y
# CONFIG_RAS_CEC is not set
# CONFIG_USB4 is not set
#
# Android
#
CONFIG_ANDROID=y
# CONFIG_ANDROID_BINDER_IPC is not set
# end of Android
CONFIG_LIBNVDIMM=m
CONFIG_BLK_DEV_PMEM=m
CONFIG_ND_BLK=m
CONFIG_ND_CLAIM=y
CONFIG_ND_BTT=m
CONFIG_BTT=y
CONFIG_ND_PFN=m
CONFIG_NVDIMM_PFN=y
CONFIG_NVDIMM_DAX=y
CONFIG_DAX_DRIVER=y
CONFIG_DAX=y
CONFIG_DEV_DAX=m
CONFIG_DEV_DAX_PMEM=m
CONFIG_DEV_DAX_KMEM=m
CONFIG_DEV_DAX_PMEM_COMPAT=m
CONFIG_NVMEM=y
CONFIG_NVMEM_SYSFS=y
#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# end of HW tracing support
# CONFIG_FPGA is not set
# CONFIG_TEE is not set
# CONFIG_UNISYS_VISORBUS is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_MOST is not set
# end of Device Drivers
#
# File systems
#
CONFIG_DCACHE_WORD_ACCESS=y
# CONFIG_VALIDATE_FS_PARSER is not set
CONFIG_FS_IOMAP=y
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=y
# CONFIG_REISERFS_CHECK is not set
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
# CONFIG_JFS_FS is not set
CONFIG_XFS_FS=m
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_XFS_RT=y
CONFIG_XFS_ONLINE_SCRUB=y
CONFIG_XFS_ONLINE_REPAIR=y
CONFIG_XFS_DEBUG=y
CONFIG_XFS_ASSERT_FATAL=y
# CONFIG_GFS2_FS is not set
CONFIG_OCFS2_FS=m
CONFIG_OCFS2_FS_O2CB=m
CONFIG_OCFS2_FS_STATS=y
CONFIG_OCFS2_DEBUG_MASKLOG=y
# CONFIG_OCFS2_DEBUG_FS is not set
CONFIG_BTRFS_FS=m
CONFIG_BTRFS_FS_POSIX_ACL=y
# CONFIG_BTRFS_FS_CHECK_INTEGRITY is not set
# CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set
# CONFIG_BTRFS_DEBUG is not set
# CONFIG_BTRFS_ASSERT is not set
# CONFIG_BTRFS_FS_REF_VERIFY is not set
# CONFIG_NILFS2_FS is not set
CONFIG_F2FS_FS=m
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_FS_SECURITY=y
# CONFIG_F2FS_CHECK_FS is not set
# CONFIG_F2FS_IO_TRACE is not set
# CONFIG_F2FS_FAULT_INJECTION is not set
# CONFIG_F2FS_FS_COMPRESSION is not set
# CONFIG_ZONEFS_FS is not set
CONFIG_FS_DAX=y
CONFIG_FS_DAX_PMD=y
CONFIG_FS_POSIX_ACL=y
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
CONFIG_FS_ENCRYPTION=y
CONFIG_FS_ENCRYPTION_ALGS=y
# CONFIG_FS_VERITY is not set
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
CONFIG_QUOTA=y
# CONFIG_QUOTA_NETLINK_INTERFACE is not set
# CONFIG_PRINT_QUOTA_WARNING is not set
# CONFIG_QUOTA_DEBUG is not set
CONFIG_QUOTA_TREE=y
# CONFIG_QFMT_V1 is not set
CONFIG_QFMT_V2=y
CONFIG_QUOTACTL=y
CONFIG_QUOTACTL_COMPAT=y
CONFIG_AUTOFS4_FS=y
CONFIG_AUTOFS_FS=y
CONFIG_FUSE_FS=y
# CONFIG_CUSE is not set
# CONFIG_VIRTIO_FS is not set
CONFIG_OVERLAY_FS=m
# CONFIG_OVERLAY_FS_REDIRECT_DIR is not set
CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW=y
# CONFIG_OVERLAY_FS_INDEX is not set
# CONFIG_OVERLAY_FS_XINO_AUTO is not set
# CONFIG_OVERLAY_FS_METACOPY is not set
#
# Caches
#
# CONFIG_FSCACHE is not set
# end of Caches
#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=y
# end of CD-ROM/DVD Filesystems
#
# DOS/FAT/EXFAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="ascii"
# CONFIG_FAT_DEFAULT_UTF8 is not set
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS_FS is not set
# end of DOS/FAT/EXFAT/NT Filesystems
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
# CONFIG_PROC_VMCORE_DEVICE_DUMP is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_PROC_CHILDREN=y
CONFIG_PROC_PID_ARCH_STATUS=y
CONFIG_PROC_CPU_RESCTRL=y
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_XATTR=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_MEMFD_CREATE=y
CONFIG_ARCH_HAS_GIGANTIC_PAGE=y
CONFIG_CONFIGFS_FS=y
CONFIG_EFIVAR_FS=m
# end of Pseudo filesystems
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
CONFIG_MINIX_FS=m
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
CONFIG_ROMFS_FS=y
CONFIG_ROMFS_BACKED_BY_BLOCK=y
CONFIG_ROMFS_ON_BLOCK=y
CONFIG_PSTORE=y
CONFIG_PSTORE_DEFLATE_COMPRESS=y
# CONFIG_PSTORE_LZO_COMPRESS is not set
# CONFIG_PSTORE_LZ4_COMPRESS is not set
# CONFIG_PSTORE_LZ4HC_COMPRESS is not set
# CONFIG_PSTORE_842_COMPRESS is not set
# CONFIG_PSTORE_ZSTD_COMPRESS is not set
CONFIG_PSTORE_COMPRESS=y
CONFIG_PSTORE_DEFLATE_COMPRESS_DEFAULT=y
CONFIG_PSTORE_COMPRESS_DEFAULT="deflate"
CONFIG_PSTORE_CONSOLE=y
CONFIG_PSTORE_PMSG=y
# CONFIG_PSTORE_FTRACE is not set
CONFIG_PSTORE_RAM=m
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EROFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V2=y
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
# CONFIG_NFS_SWAP is not set
CONFIG_NFS_V4_1=y
CONFIG_NFS_V4_2=y
CONFIG_PNFS_FILE_LAYOUT=y
CONFIG_PNFS_BLOCK=y
CONFIG_PNFS_FLEXFILE_LAYOUT=m
CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org"
# CONFIG_NFS_V4_1_MIGRATION is not set
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFS_DISABLE_UDP_SUPPORT=y
CONFIG_NFSD=y
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
# CONFIG_NFSD_BLOCKLAYOUT is not set
# CONFIG_NFSD_SCSILAYOUT is not set
# CONFIG_NFSD_FLEXFILELAYOUT is not set
# CONFIG_NFSD_V4_2_INTER_SSC is not set
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
CONFIG_SUNRPC_BACKCHANNEL=y
CONFIG_RPCSEC_GSS_KRB5=y
# CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
# CONFIG_SUNRPC_DEBUG is not set
CONFIG_SUNRPC_XPRT_RDMA=m
# CONFIG_CEPH_FS is not set
CONFIG_CIFS=y
# CONFIG_CIFS_STATS2 is not set
CONFIG_CIFS_ALLOW_INSECURE_LEGACY=y
CONFIG_CIFS_WEAK_PW_HASH=y
# CONFIG_CIFS_UPCALL is not set
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
CONFIG_CIFS_DEBUG=y
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_DEBUG_DUMP_KEYS is not set
# CONFIG_CIFS_DFS_UPCALL is not set
# CONFIG_CIFS_ROOT is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_9P_FS=y
CONFIG_9P_FS_POSIX_ACL=y
# CONFIG_9P_FS_SECURITY is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_MAC_ROMAN is not set
# CONFIG_NLS_MAC_CELTIC is not set
# CONFIG_NLS_MAC_CENTEURO is not set
# CONFIG_NLS_MAC_CROATIAN is not set
# CONFIG_NLS_MAC_CYRILLIC is not set
# CONFIG_NLS_MAC_GAELIC is not set
# CONFIG_NLS_MAC_GREEK is not set
# CONFIG_NLS_MAC_ICELAND is not set
# CONFIG_NLS_MAC_INUIT is not set
# CONFIG_NLS_MAC_ROMANIAN is not set
# CONFIG_NLS_MAC_TURKISH is not set
CONFIG_NLS_UTF8=y
# CONFIG_DLM is not set
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems
#
# Security options
#
CONFIG_KEYS=y
# CONFIG_KEYS_REQUEST_CACHE is not set
# CONFIG_PERSISTENT_KEYRINGS is not set
# CONFIG_BIG_KEYS is not set
# CONFIG_ENCRYPTED_KEYS is not set
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_PAGE_TABLE_ISOLATION=y
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
# CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="lockdown,yama,loadpin,safesetid,integrity,bpf"
#
# Kernel hardening options
#
#
# Memory initialization
#
CONFIG_INIT_STACK_NONE=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# end of Memory initialization
# end of Kernel hardening options
# end of Security options
CONFIG_XOR_BLOCKS=y
CONFIG_ASYNC_CORE=y
CONFIG_ASYNC_MEMCPY=y
CONFIG_ASYNC_XOR=y
CONFIG_ASYNC_PQ=y
CONFIG_ASYNC_RAID6_RECOV=y
CONFIG_CRYPTO=y
#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_SKCIPHER=y
CONFIG_CRYPTO_SKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
CONFIG_CRYPTO_PCRYPT=y
CONFIG_CRYPTO_CRYPTD=y
CONFIG_CRYPTO_AUTHENC=y
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_SIMD=y
CONFIG_CRYPTO_GLUE_HELPER_X86=y
CONFIG_CRYPTO_ENGINE=m
#
# Public-key cryptography
#
CONFIG_CRYPTO_RSA=y
# CONFIG_CRYPTO_DH is not set
# CONFIG_CRYPTO_ECDH is not set
# CONFIG_CRYPTO_ECRDSA is not set
# CONFIG_CRYPTO_CURVE25519 is not set
# CONFIG_CRYPTO_CURVE25519_X86 is not set
#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=y
CONFIG_CRYPTO_GCM=y
# CONFIG_CRYPTO_CHACHA20POLY1305 is not set
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_AEGIS128_AESNI_SSE2 is not set
CONFIG_CRYPTO_SEQIV=y
CONFIG_CRYPTO_ECHAINIV=m
#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CFB is not set
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_CTS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=y
# CONFIG_CRYPTO_OFB is not set
CONFIG_CRYPTO_PCBC=y
CONFIG_CRYPTO_XTS=y
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_NHPOLY1305_SSE2 is not set
# CONFIG_CRYPTO_NHPOLY1305_AVX2 is not set
# CONFIG_CRYPTO_ADIANTUM is not set
CONFIG_CRYPTO_ESSIV=y
#
# Hash modes
#
CONFIG_CRYPTO_CMAC=y
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=y
CONFIG_CRYPTO_VMAC=y
#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_CRC32C_INTEL=y
CONFIG_CRYPTO_CRC32=y
CONFIG_CRYPTO_CRC32_PCLMUL=y
CONFIG_CRYPTO_XXHASH=m
CONFIG_CRYPTO_BLAKE2B=m
# CONFIG_CRYPTO_BLAKE2S is not set
# CONFIG_CRYPTO_BLAKE2S_X86 is not set
CONFIG_CRYPTO_CRCT10DIF=y
# CONFIG_CRYPTO_CRCT10DIF_PCLMUL is not set
CONFIG_CRYPTO_GHASH=y
# CONFIG_CRYPTO_POLY1305 is not set
# CONFIG_CRYPTO_POLY1305_X86_64 is not set
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=y
CONFIG_CRYPTO_RMD128=y
CONFIG_CRYPTO_RMD160=y
CONFIG_CRYPTO_RMD256=y
CONFIG_CRYPTO_RMD320=y
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA1_SSSE3=y
# CONFIG_CRYPTO_SHA256_SSSE3 is not set
# CONFIG_CRYPTO_SHA512_SSSE3 is not set
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
# CONFIG_CRYPTO_SHA3 is not set
# CONFIG_CRYPTO_SM3 is not set
# CONFIG_CRYPTO_STREEBOG is not set
CONFIG_CRYPTO_TGR192=y
CONFIG_CRYPTO_WP512=y
CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL=y
#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
CONFIG_CRYPTO_AES_NI_INTEL=y
CONFIG_CRYPTO_ANUBIS=y
CONFIG_CRYPTO_ARC4=y
CONFIG_CRYPTO_BLOWFISH=y
CONFIG_CRYPTO_BLOWFISH_COMMON=y
CONFIG_CRYPTO_BLOWFISH_X86_64=y
CONFIG_CRYPTO_CAMELLIA=y
CONFIG_CRYPTO_CAMELLIA_X86_64=y
CONFIG_CRYPTO_CAMELLIA_AESNI_AVX_X86_64=y
# CONFIG_CRYPTO_CAMELLIA_AESNI_AVX2_X86_64 is not set
CONFIG_CRYPTO_CAST_COMMON=y
CONFIG_CRYPTO_CAST5=y
CONFIG_CRYPTO_CAST5_AVX_X86_64=y
CONFIG_CRYPTO_CAST6=y
CONFIG_CRYPTO_CAST6_AVX_X86_64=y
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_DES3_EDE_X86_64 is not set
CONFIG_CRYPTO_FCRYPT=y
CONFIG_CRYPTO_KHAZAD=y
CONFIG_CRYPTO_SALSA20=y
# CONFIG_CRYPTO_CHACHA20 is not set
# CONFIG_CRYPTO_CHACHA20_X86_64 is not set
CONFIG_CRYPTO_SEED=y
CONFIG_CRYPTO_SERPENT=y
CONFIG_CRYPTO_SERPENT_SSE2_X86_64=y
CONFIG_CRYPTO_SERPENT_AVX_X86_64=y
# CONFIG_CRYPTO_SERPENT_AVX2_X86_64 is not set
# CONFIG_CRYPTO_SM4 is not set
CONFIG_CRYPTO_TEA=y
CONFIG_CRYPTO_TWOFISH=y
CONFIG_CRYPTO_TWOFISH_COMMON=y
CONFIG_CRYPTO_TWOFISH_X86_64=y
CONFIG_CRYPTO_TWOFISH_X86_64_3WAY=y
CONFIG_CRYPTO_TWOFISH_AVX_X86_64=y
#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set
#
# Random Number Generation
#
CONFIG_CRYPTO_ANSI_CPRNG=y
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
# CONFIG_CRYPTO_DRBG_HASH is not set
# CONFIG_CRYPTO_DRBG_CTR is not set
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
CONFIG_CRYPTO_USER_API=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y
# CONFIG_CRYPTO_USER_API_RNG is not set
# CONFIG_CRYPTO_USER_API_AEAD is not set
CONFIG_CRYPTO_HASH_INFO=y
#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_AES=y
CONFIG_CRYPTO_LIB_ARC4=y
# CONFIG_CRYPTO_LIB_BLAKE2S is not set
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_DES=y
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=11
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# CONFIG_CRYPTO_LIB_CHACHA20POLY1305 is not set
CONFIG_CRYPTO_LIB_SHA256=y
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_PADLOCK is not set
# CONFIG_CRYPTO_DEV_ATMEL_ECC is not set
# CONFIG_CRYPTO_DEV_ATMEL_SHA204A is not set
# CONFIG_CRYPTO_DEV_CCP is not set
# CONFIG_CRYPTO_DEV_QAT_DH895xCC is not set
# CONFIG_CRYPTO_DEV_QAT_C3XXX is not set
# CONFIG_CRYPTO_DEV_QAT_C62X is not set
# CONFIG_CRYPTO_DEV_QAT_DH895xCCVF is not set
# CONFIG_CRYPTO_DEV_QAT_C3XXXVF is not set
# CONFIG_CRYPTO_DEV_QAT_C62XVF is not set
# CONFIG_CRYPTO_DEV_NITROX_CNN55XX is not set
CONFIG_CRYPTO_DEV_VIRTIO=m
# CONFIG_CRYPTO_DEV_SAFEXCEL is not set
# CONFIG_CRYPTO_DEV_AMLOGIC_GXL is not set
CONFIG_ASYMMETRIC_KEY_TYPE=y
CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
CONFIG_X509_CERTIFICATE_PARSER=y
# CONFIG_PKCS8_PRIVATE_KEY_PARSER is not set
CONFIG_PKCS7_MESSAGE_PARSER=y
# CONFIG_PKCS7_TEST_KEY is not set
# CONFIG_SIGNED_PE_FILE_VERIFICATION is not set
#
# Certificates for signature checking
#
CONFIG_SYSTEM_TRUSTED_KEYRING=y
CONFIG_SYSTEM_TRUSTED_KEYS=""
# CONFIG_SYSTEM_EXTRA_CERTIFICATE is not set
# CONFIG_SECONDARY_TRUSTED_KEYRING is not set
# CONFIG_SYSTEM_BLACKLIST_KEYRING is not set
# end of Certificates for signature checking
CONFIG_BINARY_PRINTF=y
#
# Library routines
#
CONFIG_RAID6_PQ=y
CONFIG_RAID6_PQ_BENCHMARK=y
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
# CONFIG_CORDIC is not set
CONFIG_RATIONAL=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_GENERIC_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_ARCH_HAS_FAST_MULTIPLIER=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=y
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
CONFIG_CRC64=y
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=y
# CONFIG_CRC8 is not set
CONFIG_XXHASH=y
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_ZSTD_COMPRESS=m
CONFIG_ZSTD_DECOMPRESS=m
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_REED_SOLOMON=m
CONFIG_REED_SOLOMON_ENC8=y
CONFIG_REED_SOLOMON_DEC8=y
CONFIG_BTREE=y
CONFIG_INTERVAL_TREE=y
CONFIG_XARRAY_MULTI=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_DMA_VIRT_OPS=y
CONFIG_SWIOTLB=y
CONFIG_DMA_CMA=y
#
# Default contiguous memory area size:
#
CONFIG_CMA_SIZE_MBYTES=200
CONFIG_CMA_SIZE_SEL_MBYTES=y
# CONFIG_CMA_SIZE_SEL_PERCENTAGE is not set
# CONFIG_CMA_SIZE_SEL_MIN is not set
# CONFIG_CMA_SIZE_SEL_MAX is not set
CONFIG_CMA_ALIGNMENT=8
# CONFIG_DMA_API_DEBUG is not set
CONFIG_SGL_ALLOC=y
CONFIG_IOMMU_HELPER=y
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
CONFIG_IRQ_POLL=y
CONFIG_MPILIB=y
CONFIG_DIMLIB=y
CONFIG_OID_REGISTRY=y
CONFIG_UCS2_STRING=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_FONT_SUPPORT=y
CONFIG_FONT_8x16=y
CONFIG_FONT_AUTOSELECT=y
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_MEMREGION=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_ARCH_HAS_UACCESS_MCSAFE=y
CONFIG_ARCH_STACKWALK=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set
# end of Library routines
#
# Kernel hacking
#
#
# printk and dmesg options
#
CONFIG_PRINTK_TIME=y
# CONFIG_PRINTK_CALLER is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_DYNAMIC_DEBUG=y
CONFIG_SYMBOLIC_ERRNAME=y
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options
#
# Compile-time checks and compiler options
#
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_REDUCED=y
# CONFIG_DEBUG_INFO_SPLIT is not set
# CONFIG_DEBUG_INFO_DWARF4 is not set
# CONFIG_GDB_SCRIPTS is not set
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_HEADERS_INSTALL is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
CONFIG_STACK_VALIDATION=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options
#
# Generic Kernel Debugging Instruments
#
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_MAGIC_SYSRQ_SERIAL_SEQUENCE=""
CONFIG_DEBUG_FS=y
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
# end of Generic Kernel Debugging Instruments
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MISC=y
#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
CONFIG_DEBUG_RODATA_TEST=y
CONFIG_GENERIC_PTDUMP=y
# CONFIG_PTDUMP_DEBUGFS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
# CONFIG_DEBUG_VM is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_MEMORY_NOTIFIER_ERROR_INJECT=m
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
# CONFIG_KASAN is not set
CONFIG_KASAN_STACK=1
# end of Memory Debugging
# CONFIG_DEBUG_SHIRQ is not set
#
# Debug Oops, Lockups and Hangs
#
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_PANIC_TIMEOUT=0
# CONFIG_SOFTLOCKUP_DETECTOR is not set
CONFIG_HARDLOCKUP_CHECK_TIMESTAMP=y
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_WQ_WATCHDOG is not set
# CONFIG_TEST_LOCKUP is not set
# end of Debug Oops, Lockups and Hangs
#
# Scheduler Debugging
#
CONFIG_SCHED_DEBUG=y
CONFIG_SCHED_INFO=y
CONFIG_SCHEDSTATS=y
# end of Scheduler Debugging
# CONFIG_DEBUG_TIMEKEEPING is not set
#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
CONFIG_DEBUG_ATOMIC_SLEEP=y
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_LOCK_TORTURE_TEST=m
CONFIG_WW_MUTEX_SELFTEST=m
# end of Lock Debugging (spinlocks, mutexes, etc...)
CONFIG_TRACE_IRQFLAGS=y
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set
#
# Debug kernel data structures
#
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
CONFIG_DEBUG_NOTIFIERS=y
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# end of Debug kernel data structures
# CONFIG_DEBUG_CREDENTIALS is not set
#
# RCU Debugging
#
CONFIG_TORTURE_TEST=m
CONFIG_RCU_PERF_TEST=m
CONFIG_RCU_TORTURE_TEST=m
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
CONFIG_LATENCYTOP=y
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_FENTRY=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_RING_BUFFER_ALLOW_SWAP=y
CONFIG_PREEMPTIRQ_TRACEPOINTS=y
CONFIG_TRACING=y
CONFIG_GENERIC_TRACER=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_BOOTTIME_TRACING is not set
CONFIG_FUNCTION_TRACER=y
CONFIG_FUNCTION_GRAPH_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y
CONFIG_FUNCTION_PROFILER=y
# CONFIG_STACK_TRACER is not set
# CONFIG_PREEMPTIRQ_EVENTS is not set
CONFIG_IRQSOFF_TRACER=y
CONFIG_SCHED_TRACER=y
# CONFIG_HWLAT_TRACER is not set
CONFIG_MMIOTRACE=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_TRACER_SNAPSHOT_PER_CPU_SWAP=y
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_KPROBE_EVENTS=y
# CONFIG_KPROBE_EVENTS_ON_NOTRACE is not set
CONFIG_UPROBE_EVENTS=y
CONFIG_BPF_EVENTS=y
CONFIG_DYNAMIC_EVENTS=y
CONFIG_PROBE_EVENTS=y
# CONFIG_BPF_KPROBE_OVERRIDE is not set
CONFIG_FTRACE_MCOUNT_RECORD=y
CONFIG_TRACING_MAP=y
CONFIG_HIST_TRIGGERS=y
# CONFIG_TRACE_EVENT_INJECT is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_TRACE_EVAL_MAP_FILE is not set
# CONFIG_FTRACE_STARTUP_TEST is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_MMIOTRACE_TEST is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_SYNTH_EVENT_GEN_TEST is not set
# CONFIG_KPROBE_EVENT_GEN_TEST is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
# CONFIG_STRICT_DEVMEM is not set
#
# x86 Debugging
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
# CONFIG_EARLY_PRINTK_DBGP is not set
# CONFIG_EARLY_PRINTK_USB_XDBC is not set
# CONFIG_EFI_PGT_DUMP is not set
# CONFIG_DEBUG_WX is not set
CONFIG_DOUBLEFAULT=y
# CONFIG_DEBUG_TLBFLUSH is not set
# CONFIG_IOMMU_DEBUG is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
# CONFIG_X86_DECODER_SELFTEST is not set
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
# CONFIG_DEBUG_BOOT_PARAMS is not set
# CONFIG_CPA_DEBUG is not set
# CONFIG_DEBUG_ENTRY is not set
# CONFIG_DEBUG_NMI_SELFTEST is not set
CONFIG_X86_DEBUG_FPU=y
# CONFIG_PUNIT_ATOM_DEBUG is not set
CONFIG_UNWINDER_ORC=y
# CONFIG_UNWINDER_FRAME_POINTER is not set
# CONFIG_UNWINDER_GUESS is not set
# end of x86 Debugging
#
# Kernel Testing and Coverage
#
# CONFIG_KUNIT is not set
CONFIG_NOTIFIER_ERROR_INJECTION=m
CONFIG_PM_NOTIFIER_ERROR_INJECT=m
# CONFIG_NETDEV_NOTIFIER_ERROR_INJECT is not set
CONFIG_FUNCTION_ERROR_INJECTION=y
CONFIG_FAULT_INJECTION=y
# CONFIG_FAILSLAB is not set
# CONFIG_FAIL_PAGE_ALLOC is not set
CONFIG_FAIL_MAKE_REQUEST=y
# CONFIG_FAIL_IO_TIMEOUT is not set
# CONFIG_FAIL_FUTEX is not set
CONFIG_FAULT_INJECTION_DEBUG_FS=y
# CONFIG_FAIL_FUNCTION is not set
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_LKDTM is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_TEST_MIN_HEAP is not set
# CONFIG_TEST_SORT is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_REED_SOLOMON_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
CONFIG_ATOMIC64_SELFTEST=y
# CONFIG_ASYNC_RAID6_TEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_TEST_STRING_HELPERS is not set
CONFIG_TEST_STRSCPY=m
# CONFIG_TEST_KSTRTOX is not set
CONFIG_TEST_PRINTF=m
CONFIG_TEST_BITMAP=m
# CONFIG_TEST_BITFIELD is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_OVERFLOW is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_IDA is not set
CONFIG_TEST_LKM=m
CONFIG_TEST_VMALLOC=m
CONFIG_TEST_USER_COPY=m
CONFIG_TEST_BPF=m
CONFIG_TEST_BLACKHOLE_DEV=m
# CONFIG_FIND_BIT_BENCHMARK is not set
CONFIG_TEST_FIRMWARE=m
CONFIG_TEST_SYSCTL=m
# CONFIG_TEST_UDELAY is not set
CONFIG_TEST_STATIC_KEYS=m
CONFIG_TEST_KMOD=m
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_TEST_STACKINIT is not set
# CONFIG_TEST_MEMINIT is not set
# CONFIG_MEMTEST is not set
# end of Kernel Testing and Coverage
# end of Kernel hacking
-------------- next part --------------
#!/bin/sh
export_top_env()
{
export suite='boot'
export testcase='boot'
export category='functional'
export timeout='10m'
export job_origin='/lkp-src/jobs/boot.yaml'
export queue_cmdline_keys='branch
commit
queue_at_least_once'
export queue='validate'
export testbox='vm-snb-ssd-16'
export tbox_group='vm-snb-ssd'
export branch='linux-devel/devel-hourly-2020050609'
export commit='e5a6f186afc353e4462a28b4bf127e872e0716b2'
export kconfig='x86_64-lkp'
export repeat_to=4
export nr_vm=64
export submit_id='5eb3128c44a7771ad3e9da55'
export
job_file='/lkp/jobs/scheduled/vm-snb-ssd-16/boot-1-yocto-x86_64-minimal-20190520.cgz-e5a6f186afc353e4462a28b4bf127e872e0716b2-20200507-6867-rkmir2-3.yaml'
export id='a57b5aceffc492bcd52983894b4bc4f51619d3b4'
export queuer_version='/lkp-src'
export model='qemu-system-x86_64 -enable-kvm -cpu SandyBridge'
export nr_cpu=2
export memory='8G'
export disk_type='virtio-scsi'
export ssd_partitions='/dev/sda /dev/sdb /dev/sdc /dev/sdd'
export hdd_partitions='/dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi
/dev/sdj'
export swap_partitions='/dev/sdk'
export ssh_base_port=33000
export need_kconfig='CONFIG_KVM_GUEST=y'
export rootfs='yocto-x86_64-minimal-20190520.cgz'
export compiler='gcc-7'
export enqueue_time='2020-05-07 03:39:58 +0800'
export _id='5eb3128f44a7771ad3e9da56'
export
_rt='/result/boot/1/vm-snb-ssd/yocto-x86_64-minimal-20190520.cgz/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2'
export user='lkp'
export
result_root='/result/boot/1/vm-snb-ssd/yocto-x86_64-minimal-20190520.cgz/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/3'
export scheduler_version='/lkp/lkp/.src-20200506-145547'
export LKP_SERVER='inn'
export arch='x86_64'
export max_uptime=600
export initrd='/osimage/yocto/yocto-x86_64-minimal-20190520.cgz'
export bootloader_append='root=/dev/ram0
user=lkp
job=/lkp/jobs/scheduled/vm-snb-ssd-16/boot-1-yocto-x86_64-minimal-20190520.cgz-e5a6f186afc353e4462a28b4bf127e872e0716b2-20200507-6867-rkmir2-3.yaml
ARCH=x86_64
kconfig=x86_64-lkp
branch=linux-devel/devel-hourly-2020050609
commit=e5a6f186afc353e4462a28b4bf127e872e0716b2
BOOT_IMAGE=/pkg/linux/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/vmlinuz-5.7.0-rc2-00092-ge5a6f186afc353
max_uptime=600
RESULT_ROOT=/result/boot/1/vm-snb-ssd/yocto-x86_64-minimal-20190520.cgz/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/3
LKP_SERVER=inn
selinux=0
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
drbd.minor_count=8
systemd.log_level=err
ignore_loglevel
console=tty0
earlyprintk=ttyS0,115200
console=ttyS0,115200
vga=normal
rw'
export
modules_initrd='/pkg/linux/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/modules.cgz'
export lkp_initrd='/osimage/user/lkp/lkp-x86_64.cgz'
export site='inn'
export LKP_CGI_PORT=80
export LKP_CIFS_PORT=139
export schedule_notify_address export queue_at_least_once=1
export
kernel='/pkg/linux/x86_64-lkp/gcc-7/e5a6f186afc353e4462a28b4bf127e872e0716b2/vmlinuz-5.7.0-rc2-00092-ge5a6f186afc353'
export dequeue_time='2020-05-07 03:52:02 +0800'
export
job_initrd='/lkp/jobs/scheduled/vm-snb-ssd-16/boot-1-yocto-x86_64-minimal-20190520.cgz-e5a6f186afc353e4462a28b4bf127e872e0716b2-20200507-6867-rkmir2-3.cgz'
[ -n "$LKP_SRC" ] ||
export LKP_SRC=/lkp/${user:-lkp}/src
}
run_job()
{
echo $$ > $TMP/run-job.pid
. $LKP_SRC/lib/http.sh
. $LKP_SRC/lib/job.sh
. $LKP_SRC/lib/env.sh
export_top_env
run_monitor $LKP_SRC/monitors/one-shot/wrapper boot-slabinfo
run_monitor $LKP_SRC/monitors/one-shot/wrapper boot-meminfo
run_monitor $LKP_SRC/monitors/one-shot/wrapper memmap
run_monitor $LKP_SRC/monitors/no-stdout/wrapper boot-time
run_monitor $LKP_SRC/monitors/wrapper kmsg
run_monitor $LKP_SRC/monitors/wrapper heartbeat
run_monitor $LKP_SRC/monitors/wrapper meminfo
run_monitor $LKP_SRC/monitors/wrapper oom-killer
run_monitor $LKP_SRC/monitors/plain/watchdog
run_test $LKP_SRC/tests/wrapper sleep 1
}
extract_stats()
{
export stats_part_begin export stats_part_end
$LKP_SRC/stats/wrapper boot-slabinfo
$LKP_SRC/stats/wrapper boot-meminfo
$LKP_SRC/stats/wrapper memmap
$LKP_SRC/stats/wrapper boot-memory
$LKP_SRC/stats/wrapper boot-time
$LKP_SRC/stats/wrapper kernel-size
$LKP_SRC/stats/wrapper kmsg
$LKP_SRC/stats/wrapper sleep
$LKP_SRC/stats/wrapper meminfo
$LKP_SRC/stats/wrapper time sleep.time
$LKP_SRC/stats/wrapper dmesg
$LKP_SRC/stats/wrapper kmsg
$LKP_SRC/stats/wrapper last_state
$LKP_SRC/stats/wrapper stderr
$LKP_SRC/stats/wrapper time
}
"$@"
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dmesg.xz
Type: application/x-xz
Size: 1504 bytes
Desc: not available
URL:
<http://lists.linuxfoundation.org/pipermail/virtualization/attachments/20200507/a97512e4/attachment-0001.xz>
Borislav Petkov
2020-May-09 09:05 UTC
[PATCH v3 19/75] x86/boot/compressed/64: Add stage1 #VC handler
On Tue, Apr 28, 2020 at 05:16:29PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > Add the first handler for #VC exceptions. At stage 1 there is no GHCB > yet becaue we might still be on the EFI page table and thus can't map"... because the kernel might still be running on the EFI page table... "> memory unencrypted. > > The stage 1 handler is limited to the MSR based protocol to talk to > the hypervisor and can only support CPUID exit-codes, but that is > enough to get to stage 2. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/boot/compressed/Makefile | 1 + > arch/x86/boot/compressed/idt_64.c | 4 ++ > arch/x86/boot/compressed/idt_handlers_64.S | 4 ++ > arch/x86/boot/compressed/misc.h | 1 + > arch/x86/boot/compressed/sev-es.c | 45 +++++++++++++++ > arch/x86/include/asm/msr-index.h | 1 + > arch/x86/include/asm/sev-es.h | 37 ++++++++++++ > arch/x86/include/asm/trap_defs.h | 1 + > arch/x86/kernel/sev-es-shared.c | 65 ++++++++++++++++++++++ > 9 files changed, 159 insertions(+) > create mode 100644 arch/x86/boot/compressed/sev-es.c > create mode 100644 arch/x86/include/asm/sev-es.h > create mode 100644 arch/x86/kernel/sev-es-shared.c > > diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile > index c6909d10a6b9..a7847a1ef63a 100644 > --- a/arch/x86/boot/compressed/Makefile > +++ b/arch/x86/boot/compressed/Makefile > @@ -85,6 +85,7 @@ ifdef CONFIG_X86_64 > vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o > vmlinux-objs-y += $(obj)/mem_encrypt.o > vmlinux-objs-y += $(obj)/pgtable_64.o > + vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev-es.o > endif > > vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o > diff --git a/arch/x86/boot/compressed/idt_64.c b/arch/x86/boot/compressed/idt_64.c > index 99cc78062684..f8295d68b3e1 100644 > --- a/arch/x86/boot/compressed/idt_64.c > +++ b/arch/x86/boot/compressed/idt_64.c > @@ -31,6 +31,10 @@ void load_stage1_idt(void) > { > boot_idt_desc.address = (unsigned long)boot_idt; > > +#ifdef CONFIG_AMD_MEM_ENCRYPT > + set_idt_entry(X86_TRAP_VC, boot_stage1_vc); > +#endifif (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) seems to work too and drops the ifdeffery ugliness. ...> +void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code) > +{ > + unsigned int fn = lower_bits(regs->ax, 32); > + unsigned long val; > + > + /* Only CPUID is supported via MSR protocol */ > + if (exit_code != SVM_EXIT_CPUID) > + goto fail; > + > + sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EAX)); > + VMGEXIT(); > + val = sev_es_rd_ghcb_msr(); > + if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP) > + goto fail; > + regs->ax = val >> 32; > + > + sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EBX)); > + VMGEXIT(); > + val = sev_es_rd_ghcb_msr(); > + if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP) > + goto fail; > + regs->bx = val >> 32; > + > + sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_ECX)); > + VMGEXIT(); > + val = sev_es_rd_ghcb_msr(); > + if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP) > + goto fail; > + regs->cx = val >> 32; > + > + sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, GHCB_CPUID_REQ_EDX)); > + VMGEXIT(); > + val = sev_es_rd_ghcb_msr(); > + if (GHCB_SEV_GHCB_RESP_CODE(val) != GHCB_SEV_CPUID_RESP) > + goto fail; > + regs->dx = val >> 32;This could use a comment: /* Skip over the CPUID two-byte opcode */ or so. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-11 10:02 UTC
[PATCH v3 22/75] x86/boot/compressed/64: Add set_page_en/decrypted() helpers
On Tue, Apr 28, 2020 at 05:16:32PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > The functions are needed to map the GHCB for SEV-ES guests. The GHCB is > used for communication with the hypervisor, so its content must not be > encrypted. After the GHCB is not needed anymore it must be mapped > encrypted again so that the running kernel image can safely re-use the > memory. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/boot/compressed/ident_map_64.c | 134 ++++++++++++++++++++++++ > arch/x86/boot/compressed/misc.h | 2 + > 2 files changed, 136 insertions(+)...> + > +static int set_clr_page_flags(struct x86_mapping_info *info, > + unsigned long address, > + pteval_t set, pteval_t clr) > +{ > + unsigned long scratch, *target; > + pgd_t *pgdp = (pgd_t *)top_level_pgt; > + p4d_t *p4dp; > + pud_t *pudp; > + pmd_t *pmdp; > + pte_t *ptep, pte; > + > + /* > + * First make sure there is a PMD mapping for 'address'. > + * It should already exist, but keep things generic. > + * > + * To map the page just read from it and fault it in if there is no > + * mapping yet. add_identity_map() can't be called here because that > + * would unconditionally map the address on PMD level, destroying any > + * PTE-level mappings that might already exist. Also do something > + * uselessYou mean something like this? asm volatile("mov %[address], %%r9" :: [address] "g" (*(unsigned long *)address) : "r9", "memory"); The "memory" clobber should prevent gcc from optimizing that thing away and r9 is callee-clobbered. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-11 20:07 UTC
[PATCH v3 23/75] x86/boot/compressed/64: Setup GHCB Based VC Exception handler
On Tue, Apr 28, 2020 at 05:16:33PM +0200, Joerg Roedel wrote:> @@ -63,3 +175,45 @@ void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code) > while (true) > asm volatile("hlt\n"); > } > + > +static enum es_result vc_insn_string_read(struct es_em_ctxt *ctxt, > + void *src, char *buf, > + unsigned int data_size, > + unsigned int count, > + bool backwards) > +{ > + int i, b = backwards ? -1 : 1; > + enum es_result ret = ES_OK; > + > + for (i = 0; i < count; i++) { > + void *s = src + (i * data_size * b); > + char *d = buf + (i * data_size);>From a previous review:Where are we checking whether that count is not exceeding @buf or similar discrepancies? Ditto below.> + > + ret = vc_read_mem(ctxt, s, d, data_size); > + if (ret != ES_OK) > + break; > + } > + > + return ret; > +} > + > +static enum es_result vc_insn_string_write(struct es_em_ctxt *ctxt, > + void *dst, char *buf, > + unsigned int data_size, > + unsigned int count, > + bool backwards) > +{ > + int i, s = backwards ? -1 : 1; > + enum es_result ret = ES_OK; > + > + for (i = 0; i < count; i++) { > + void *d = dst + (i * data_size * s); > + char *b = buf + (i * data_size); > + > + ret = vc_write_mem(ctxt, d, b, data_size); > + if (ret != ES_OK) > + break; > + } > + > + return ret; > +} > -- > 2.17.1 >-- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-12 18:11 UTC
[PATCH v3 23/75] x86/boot/compressed/64: Setup GHCB Based VC Exception handler
On Tue, Apr 28, 2020 at 05:16:33PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > Install an exception handler for #VC exception that uses a GHCB. Also > add the infrastructure for handling different exit-codes by decoding > the instruction that caused the exception and error handling. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/Kconfig | 1 + > arch/x86/boot/compressed/Makefile | 3 + > arch/x86/boot/compressed/idt_64.c | 4 + > arch/x86/boot/compressed/idt_handlers_64.S | 3 +- > arch/x86/boot/compressed/misc.c | 7 + > arch/x86/boot/compressed/misc.h | 7 + > arch/x86/boot/compressed/sev-es.c | 110 +++++++++++++++ > arch/x86/include/asm/sev-es.h | 39 ++++++ > arch/x86/include/uapi/asm/svm.h | 1 + > arch/x86/kernel/sev-es-shared.c | 154 +++++++++++++++++++++ > 10 files changed, 328 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 1197b5596d5a..2ba5f74f186d 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -1523,6 +1523,7 @@ config AMD_MEM_ENCRYPT > select DYNAMIC_PHYSICAL_MASK > select ARCH_USE_MEMREMAP_PROT > select ARCH_HAS_FORCE_DMA_UNENCRYPTED > + select INSTRUCTION_DECODER > ---help--- > Say yes to enable support for the encryption of system memory. > This requires an AMD processor that supports Secure Memory > diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile > index a7847a1ef63a..8372b85c9c0e 100644 > --- a/arch/x86/boot/compressed/Makefile > +++ b/arch/x86/boot/compressed/Makefile > @@ -41,6 +41,9 @@ KBUILD_CFLAGS += -Wno-pointer-sign > KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) > KBUILD_CFLAGS += -fno-asynchronous-unwind-tables > > +# sev-es.c inludes generated $(objtree)/arch/x86/lib/inat-tables.c"includes"> +CFLAGS_sev-es.o += -I$(objtree)/arch/x86/lib/Does it? I see #include "../../lib/inat.c" #include "../../lib/insn.c" only and with the above CFLAGS-line removed, it builds still. Leftover from earlier?> + > KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ > GCOV_PROFILE := n > UBSAN_SANITIZE :=n > diff --git a/arch/x86/boot/compressed/idt_64.c b/arch/x86/boot/compressed/idt_64.c > index f8295d68b3e1..44d20c4f47c9 100644 > --- a/arch/x86/boot/compressed/idt_64.c > +++ b/arch/x86/boot/compressed/idt_64.c > @@ -45,5 +45,9 @@ void load_stage2_idt(void) > > set_idt_entry(X86_TRAP_PF, boot_page_fault); > > +#ifdef CONFIG_AMD_MEM_ENCRYPT > + set_idt_entry(X86_TRAP_VC, boot_stage2_vc); > +#endifif IS_ENABLED()... ...> +static enum es_result vc_decode_insn(struct es_em_ctxt *ctxt) > +{ > + char buffer[MAX_INSN_SIZE]; > + enum es_result ret; > + > + memcpy(buffer, (unsigned char *)ctxt->regs->ip, MAX_INSN_SIZE); > + > + insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE, 1); > + insn_get_length(&ctxt->insn); > + > + ret = ctxt->insn.immediate.got ? ES_OK : ES_DECODE_FAILED;Why are we checking whether the immediate? insn_get_length() sets insn->length unconditionally while insn_get_immediate() can error out and not set ->got... ?> + > + return ret; > +}...> +static bool sev_es_setup_ghcb(void) > +{ > + if (!sev_es_negotiate_protocol()) > + sev_es_terminate(GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED); > + > + if (set_page_decrypted((unsigned long)&boot_ghcb_page)) > + return false; > + > + /* Page is now mapped decrypted, clear it */ > + memset(&boot_ghcb_page, 0, sizeof(boot_ghcb_page)); > + > + boot_ghcb = &boot_ghcb_page; > + > + /* Initialize lookup tables for the instruction decoder */ > + inat_init_tables();Yeah, that call doesn't logically belong in this function AFAICT as this function should setup the GHCB only. You can move it to the caller.> + > + return true; > +} > + > +void sev_es_shutdown_ghcb(void) > +{ > + if (!boot_ghcb) > + return; > + > + /* > + * GHCB Page must be flushed from the cache and mapped encrypted again. > + * Otherwise the running kernel will see strange cache effects when > + * trying to use that page. > + */ > + if (set_page_encrypted((unsigned long)&boot_ghcb_page)) > + error("Can't map GHCB page encrypted");Is that error() call enough? Shouldn't we BUG_ON() here or mark that page Reserved or so, so that nothing uses it during the system lifetime and thus avoid the strange cache effects? ...> +static enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb, > + struct es_em_ctxt *ctxt, > + u64 exit_code, u64 exit_info_1, > + u64 exit_info_2) > +{ > + enum es_result ret; > + > + /* Fill in protocol and format specifiers */ > + ghcb->protocol_version = GHCB_PROTOCOL_MAX; > + ghcb->ghcb_usage = GHCB_DEFAULT_USAGE; > + > + ghcb_set_sw_exit_code(ghcb, exit_code); > + ghcb_set_sw_exit_info_1(ghcb, exit_info_1); > + ghcb_set_sw_exit_info_2(ghcb, exit_info_2); > + > + sev_es_wr_ghcb_msr(__pa(ghcb)); > + VMGEXIT(); > + > + if ((ghcb->save.sw_exit_info_1 & 0xffffffff) == 1) {^^^^^^^^^^^ (1UL << 32) - 1 I guess. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-13 11:13 UTC
[PATCH v3 24/75] x86/boot/compressed/64: Unmap GHCB page before booting the kernel
On Tue, Apr 28, 2020 at 05:16:34PM +0200, Joerg Roedel wrote:> @@ -302,9 +313,13 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code) > * - User faults > * - Reserved bits set > */ > - if (error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) { > + if (ghcb_fault || > + error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) { > /* Print some information for debugging */ > - error_putstr("Unexpected page-fault:"); > + if (ghcb_fault) > + error_putstr("Page-fault on GHCB page:"); > + else > + error_putstr("Unexpected page-fault:");You could carve out the info dumping into a separate function to unclutter this if-statement (diff ontop): diff --git a/arch/x86/boot/compressed/ident_map_64.c b/arch/x86/boot/compressed/ident_map_64.c index d3771d455249..c1979fc0f853 100644 --- a/arch/x86/boot/compressed/ident_map_64.c +++ b/arch/x86/boot/compressed/ident_map_64.c @@ -296,6 +296,22 @@ int set_page_non_present(unsigned long address) return set_clr_page_flags(&mapping_info, address, 0, _PAGE_PRESENT); } +static void do_pf_error(const char *msg, unsigned long error_code, + unsigned long address, unsigned long ip) +{ + error_putstr(msg); + + error_putstr("\nError Code: "); + error_puthex(error_code); + error_putstr("\nCR2: 0x"); + error_puthex(address); + error_putstr("\nRIP relative to _head: 0x"); + error_puthex(ip - (unsigned long)_head); + error_putstr("\n"); + + error("Stopping.\n"); +} + void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code) { unsigned long address = native_read_cr2(); @@ -309,27 +325,15 @@ void do_boot_page_fault(struct pt_regs *regs, unsigned long error_code) /* * Check for unexpected error codes. Unexpected are: + * - Faults on the GHCB page due to unexpected #VCs * - Faults on present pages * - User faults * - Reserved bits set */ - if (ghcb_fault || - error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) { - /* Print some information for debugging */ - if (ghcb_fault) - error_putstr("Page-fault on GHCB page:"); - else - error_putstr("Unexpected page-fault:"); - error_putstr("\nError Code: "); - error_puthex(error_code); - error_putstr("\nCR2: 0x"); - error_puthex(address); - error_putstr("\nRIP relative to _head: 0x"); - error_puthex(regs->ip - (unsigned long)_head); - error_putstr("\n"); - - error("Stopping.\n"); - } + if (ghcb_fault) + do_pf_error("Page-fault on GHCB page:", error_code, address, regs->ip); + else if (error_code & (X86_PF_PROT | X86_PF_USER | X86_PF_RSVD)) + do_pf_error("Unexpected page-fault:", error_code, address, regs->ip); /* * Error code is sane - now identity map the 2M region around -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-13 17:58 UTC
[PATCH v3 25/75] x86/sev-es: Add support for handling IOIO exceptions
On Tue, Apr 28, 2020 at 05:16:35PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Add support for decoding and handling #VC exceptions for IOIO events. > > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: Adapted code to #VC handling framework ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/boot/compressed/sev-es.c | 32 +++++ > arch/x86/kernel/sev-es-shared.c | 202 ++++++++++++++++++++++++++++++ > 2 files changed, 234 insertions(+)Just nitpicks and some more commenting needed:> +static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt) > +{ > + struct pt_regs *regs = ctxt->regs; > + u64 exit_info_1, exit_info_2; > + enum es_result ret; > + > + ret = vc_ioio_exitinfo(ctxt, &exit_info_1); > + if (ret != ES_OK) > + return ret; > + > + if (exit_info_1 & IOIO_TYPE_STR) { > + int df = (regs->flags & X86_EFLAGS_DF) ? -1 : 1; > + unsigned int io_bytes, exit_bytes; > + unsigned int ghcb_count, op_count; > + unsigned long es_base; > + u64 sw_scratch; > + > + /* > + * For the string variants with rep prefix the amount of in/out > + * operations per #VC exception is limited so that the kernel > + * has a chance to take interrupts an re-schedule while the^ and> + * instruction is emulated. > + */ > + io_bytes = (exit_info_1 >> 4) & 0x7; > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > + > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > + exit_info_2 = min(op_count, ghcb_count); > + exit_bytes = exit_info_2 * io_bytes; > + > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES);In general, I could use some commenting here to find my way around it: /* Read bytes of OUTS into the shared buffer */> + > + if (!(exit_info_1 & IOIO_TYPE_IN)) { > + ret = vc_insn_string_read(ctxt, > + (void *)(es_base + regs->si), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df); > + if (ret) > + return ret; > + }/* * Issue an VMGEXIT to the HV to consume the bytes from the * shared buffer or to have it write them into the shared buffer * depending on the instruction: OUTS or INS. */> + > + sw_scratch = __pa(ghcb) + offsetof(struct ghcb, shared_buffer); > + ghcb_set_sw_scratch(ghcb, sw_scratch); > + ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO, > + exit_info_1, exit_info_2);Align arguments on the opening brace.> + if (ret != ES_OK) > + return ret; > + > + /* Everything went well, write back results *//* Read bytes from shared buffer into the guest's destination. */> + if (exit_info_1 & IOIO_TYPE_IN) { > + ret = vc_insn_string_write(ctxt, > + (void *)(es_base + regs->di), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df); > + if (ret) > + return ret; > + > + if (df) > + regs->di -= exit_bytes; > + else > + regs->di += exit_bytes; > + } else { > + if (df) > + regs->si -= exit_bytes; > + else > + regs->si += exit_bytes; > + } > + > + if (exit_info_1 & IOIO_REP) > + regs->cx -= exit_info_2; > + > + ret = regs->cx ? ES_RETRY : ES_OK; > + > + } else {/* IN/OUT into/from rAX */> + int bits = (exit_info_1 & 0x70) >> 1; > + u64 rax = 0; > + > + if (!(exit_info_1 & IOIO_TYPE_IN)) > + rax = lower_bits(regs->ax, bits); > + > + ghcb_set_rax(ghcb, rax); > + > + ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO, exit_info_1, 0); > + if (ret != ES_OK) > + return ret; > + > + if (exit_info_1 & IOIO_TYPE_IN) { > + if (!ghcb_is_valid_rax(ghcb)) > + return ES_VMM_ERROR; > + regs->ax = lower_bits(ghcb->save.rax, bits); > + } > + } > + > + return ret; > +} > --Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-16 07:57 UTC
[PATCH v3 25/75] x86/sev-es: Add support for handling IOIO exceptions
Just a reminder so that this doesn't get lost: On Tue, Apr 28, 2020 at 05:16:35PM +0200, Joerg Roedel wrote:> + if (exit_info_1 & IOIO_TYPE_STR) { > + int df = (regs->flags & X86_EFLAGS_DF) ? -1 : 1;...> + > + if (!(exit_info_1 & IOIO_TYPE_IN)) { > + ret = vc_insn_string_read(ctxt, > + (void *)(es_base + regs->si), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df);^^^^> + > + /* Everything went well, write back results */ > + if (exit_info_1 & IOIO_TYPE_IN) { > + ret = vc_insn_string_write(ctxt, > + (void *)(es_base + regs->di), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df);^^^^ -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
On Tue, Apr 28, 2020 at 05:16:41PM +0200, Joerg Roedel wrote:> @@ -480,6 +500,22 @@ SYM_DATA_LOCAL(early_gdt_descr_base, .quad INIT_PER_CPU_VAR(gdt_page)) > SYM_DATA(phys_base, .quad 0x0) > EXPORT_SYMBOL(phys_base) > > +/* Boot GDT used when kernel addresses are not mapped yet */ > +SYM_DATA_LOCAL(boot_gdt_descr, .word boot_gdt_end - boot_gdt) > +SYM_DATA_LOCAL(boot_gdt_base, .quad 0) > +SYM_DATA_START(boot_gdt) > + .quad 0 > + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */ > + .quad 0x00af9a000000ffff /* __KERNEL_CS */ > + .quad 0x00cf92000000ffff /* __KERNEL_DS */ > + .quad 0 /* __USER32_CS - unused */ > + .quad 0 /* __USER_DS - unused */ > + .quad 0 /* __USER_CS - unused */ > + .quad 0 /* unused */ > + .quad 0x0080890000000000 /* TSS descriptor */ > + .quad 0x0000000000000000 /* TSS continued */Any chance you could use macros ala GDT_ENTRY_INIT() for those instead of the naked values? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-19 09:15 UTC
[PATCH v3 35/75] x86/head/64: Build k/head64.c with -fno-stack-protector
On Tue, Apr 28, 2020 at 05:16:45PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > The code inserted by the stack protector does not work in the early > boot environment because it uses the GS segment, at least with memory > encryption enabled.Can you elaborate on why is that a problem? The stack cookie is not generated that early yet so it should be comparing %gs:40 to 0. Also, it generates the checking code here only with CONFIG_STACKPROTECTOR_STRONG=y> Make sure the early code is compiled without this feature enabled.If so, then this should be with CONFIG_AMD_MEM_ENCRYPT ifdeffery around it. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Brian Gerst
2020-May-19 13:58 UTC
[PATCH v3 35/75] x86/head/64: Build k/head64.c with -fno-stack-protector
On Tue, Apr 28, 2020 at 11:28 AM Joerg Roedel <joro at 8bytes.org> wrote:> > From: Joerg Roedel <jroedel at suse.de> > > The code inserted by the stack protector does not work in the early > boot environment because it uses the GS segment, at least with memory > encryption enabled. Make sure the early code is compiled without this > feature enabled. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/Makefile | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile > index ba89cabe5fcf..1192de38fa56 100644 > --- a/arch/x86/kernel/Makefile > +++ b/arch/x86/kernel/Makefile > @@ -35,6 +35,10 @@ ifdef CONFIG_FRAME_POINTER > OBJECT_FILES_NON_STANDARD_ftrace_$(BITS).o := y > endif > > +# make sure head64.c is built without stack protector > +nostackp := $(call cc-option, -fno-stack-protector) > +CFLAGS_head64.o := $(nostackp) > + > # If instrumentation of this dir is enabled, boot hangs during first second. > # Probably could be more selective here, but note that files related to irqs, > # boot, dumpstack/stacktrace, etc are either non-interesting or can lead toThe proper fix would be to initialize MSR_GS_BASE earlier. -- Brian Gerst
Sean Christopherson
2020-May-20 05:16 UTC
[PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
On Tue, Apr 28, 2020 at 05:17:14PM +0200, Joerg Roedel wrote:> From: Mike Stunes <mstunes at vmware.com> > > To avoid a future VMEXIT for a subsequent CPUID function, cache the > results returned by CPUID into an xarray. > > [tl: coding standard changes, register zero extension] > > Signed-off-by: Mike Stunes <mstunes at vmware.com> > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: - Wrapped cache handling into vc_handle_cpuid_cached() > - Used lower_32_bits() where applicable > - Moved cache_index out of struct es_em_ctxt ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > ---...> +struct sev_es_cpuid_cache_entry { > + unsigned long eax; > + unsigned long ebx; > + unsigned long ecx; > + unsigned long edx;Why are these unsigned longs? CPUID returns 32-bit values, this wastes 16 bytes per entry.> +}; > + > +static struct xarray sev_es_cpuid_cache; > +static bool __ro_after_init sev_es_cpuid_cache_initialized; > + > /* For early boot hypervisor communication in SEV-ES enabled guests */ > static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE); > > @@ -463,6 +474,9 @@ void __init sev_es_init_vc_handling(void) > sev_es_setup_vc_stack(cpu); > } > > + xa_init_flags(&sev_es_cpuid_cache, XA_FLAGS_LOCK_IRQ); > + sev_es_cpuid_cache_initialized = true; > + > init_vc_stack_names(); > } > > @@ -744,6 +758,91 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb, > return ret; > } > > +static unsigned long sev_es_get_cpuid_cache_index(struct es_em_ctxt *ctxt) > +{ > + unsigned long hi, lo; > + > + /* Don't attempt to cache until the xarray is initialized */ > + if (!sev_es_cpuid_cache_initialized) > + return ULONG_MAX; > + > + lo = lower_32_bits(ctxt->regs->ax); > + > + /* > + * CPUID 0x0000000d requires both RCX and XCR0, so it can't be > + * cached. > + */ > + if (lo == 0x0000000d) > + return ULONG_MAX; > + > + /* > + * Some callers of CPUID don't always set RCX to zero for CPUID > + * functions that don't require RCX, which can result in excessive > + * cached values, so RCX needs to be manually zeroed for use as part > + * of the cache index. Future CPUID values may need RCX, but since > + * they can't be known, they must not be cached. > + */ > + if (lo > 0x80000020) > + return ULONG_MAX; > + > + switch (lo) { > + case 0x00000007:OSPKE may or may not be cached correctly depending on when sev_es_cpuid_cache_initialized is set.> + case 0x0000000b: > + case 0x0000000f: > + case 0x00000010: > + case 0x8000001d: > + case 0x80000020: > + hi = ctxt->regs->cx << 32; > + break; > + default: > + hi = 0; > + } > + > + return hi | lo;This needs to be way more restrictive on what is cached. Unless I've overlooked something, this lets userspace trigger arbitrary, unaccounted kernel memory allocations. E.g. for (i = 0; i <= 0x80000020; i++) { for (j = 0; j <= 0xffffffff; j++) { cpuid(i, j); if (i != 7 || i != 0xb || i != 0xf || i != 0x10 || i != 0x8000001d || i != 0x80000020) break; } } The whole cache on-demand approach seems like overkill. The number of CPUID leaves that are invoked after boot with any regularity can probably be counted on one hand. IIRC glibc invokes CPUID to gather TLB/cache info, XCR0-based features, and one or two other leafs. A statically sized global array that's arbitrarily index a la x86_capability would be just as simple and more performant. It would also allow fancier things like emulating CPUID 0xD in the guest if you want to go down that road.
Sean Christopherson
2020-May-20 06:20 UTC
[PATCH v3 25/75] x86/sev-es: Add support for handling IOIO exceptions
On Tue, Apr 28, 2020 at 05:16:35PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Add support for decoding and handling #VC exceptions for IOIO events. > > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: Adapted code to #VC handling framework ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/boot/compressed/sev-es.c | 32 +++++ > arch/x86/kernel/sev-es-shared.c | 202 ++++++++++++++++++++++++++++++ > 2 files changed, 234 insertions(+) > > diff --git a/arch/x86/boot/compressed/sev-es.c b/arch/x86/boot/compressed/sev-es.c > index 1241697dd156..17765e471e28 100644 > --- a/arch/x86/boot/compressed/sev-es.c > +++ b/arch/x86/boot/compressed/sev-es.c > @@ -23,6 +23,35 @@...> +static enum es_result vc_handle_ioio(struct ghcb *ghcb, struct es_em_ctxt *ctxt) > +{ > + struct pt_regs *regs = ctxt->regs; > + u64 exit_info_1, exit_info_2; > + enum es_result ret; > + > + ret = vc_ioio_exitinfo(ctxt, &exit_info_1); > + if (ret != ES_OK) > + return ret; > + > + if (exit_info_1 & IOIO_TYPE_STR) { > + int df = (regs->flags & X86_EFLAGS_DF) ? -1 : 1; > + unsigned int io_bytes, exit_bytes; > + unsigned int ghcb_count, op_count; > + unsigned long es_base; > + u64 sw_scratch; > + > + /* > + * For the string variants with rep prefix the amount of in/out > + * operations per #VC exception is limited so that the kernel > + * has a chance to take interrupts an re-schedule while the > + * instruction is emulated.Doesn't this also suppress single-step #DBs?> + */ > + io_bytes = (exit_info_1 >> 4) & 0x7; > + ghcb_count = sizeof(ghcb->shared_buffer) / io_bytes; > + > + op_count = (exit_info_1 & IOIO_REP) ? regs->cx : 1; > + exit_info_2 = min(op_count, ghcb_count); > + exit_bytes = exit_info_2 * io_bytes; > + > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); > + > + if (!(exit_info_1 & IOIO_TYPE_IN)) { > + ret = vc_insn_string_read(ctxt, > + (void *)(es_base + regs->si),SEV(-ES) is 64-bit only, why bother with the es_base charade?> + ghcb->shared_buffer, io_bytes, > + exit_info_2, df);df handling is busted, it's aways non-zero. Same goes for the SI/DI adjustments below.> + if (ret) > + return ret; > + } > + > + sw_scratch = __pa(ghcb) + offsetof(struct ghcb, shared_buffer); > + ghcb_set_sw_scratch(ghcb, sw_scratch); > + ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO, > + exit_info_1, exit_info_2); > + if (ret != ES_OK) > + return ret;Batching the memory accesses and I/O accesses separately is technically wrong, e.g. a #DB on a memory access will result in bogus data being shown in the debugger. In practice it seems unlikely to matter, but I'm curious as to why string I/O is supported in the first place. I didn't think there was that much string I/O in the kernel?> + > + /* Everything went well, write back results */ > + if (exit_info_1 & IOIO_TYPE_IN) { > + ret = vc_insn_string_write(ctxt, > + (void *)(es_base + regs->di), > + ghcb->shared_buffer, io_bytes, > + exit_info_2, df); > + if (ret) > + return ret; > + > + if (df) > + regs->di -= exit_bytes; > + else > + regs->di += exit_bytes; > + } else { > + if (df) > + regs->si -= exit_bytes; > + else > + regs->si += exit_bytes; > + } > + > + if (exit_info_1 & IOIO_REP) > + regs->cx -= exit_info_2; > + > + ret = regs->cx ? ES_RETRY : ES_OK; > + > + } else { > + int bits = (exit_info_1 & 0x70) >> 1; > + u64 rax = 0; > + > + if (!(exit_info_1 & IOIO_TYPE_IN)) > + rax = lower_bits(regs->ax, bits); > + > + ghcb_set_rax(ghcb, rax); > + > + ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_IOIO, exit_info_1, 0); > + if (ret != ES_OK) > + return ret; > + > + if (exit_info_1 & IOIO_TYPE_IN) { > + if (!ghcb_is_valid_rax(ghcb)) > + return ES_VMM_ERROR; > + regs->ax = lower_bits(ghcb->save.rax, bits); > + } > + } > + > + return ret; > +} > -- > 2.17.1 >
On Tue, Apr 28, 2020 at 05:17:01PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Add handler for VC exceptions caused by MMIO intercepts. These > intercepts come along as nested page faults on pages with reserved > bits set. > > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: Adapt to VC handling framework ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > ---...> diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index f4ce3b475464..e3662723ed76 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -294,6 +294,25 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt, > return ES_EXCEPTION; > } > > +static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb, unsigned long vaddr) > +{ > + unsigned long va = (unsigned long)vaddr; > + unsigned int level; > + phys_addr_t pa; > + pgd_t *pgd; > + pte_t *pte; > + > + pgd = pgd_offset(current->active_mm, va); > + pte = lookup_address_in_pgd(pgd, va, &level); > + if (!pte) > + return 0;'0' is a valid physical address. It happens to be reserved in the kernel thanks to L1TF, but using '0' as an error code is ugly. Not to mention none of the callers actually check the result.> + > + pa = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT; > + pa |= va & ~page_level_mask(level); > + > + return pa; > +}
Sean Christopherson
2020-May-20 06:38 UTC
[PATCH v3 59/75] x86/sev-es: Handle MONITOR/MONITORX Events
On Tue, Apr 28, 2020 at 05:17:09PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Implement a handler for #VC exceptions caused by MONITOR and MONITORX > instructions. > > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: Adapt to #VC handling infrastructure ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index 601554e6360f..1a961714cd1b 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -824,6 +824,22 @@ static enum es_result vc_handle_rdpmc(struct ghcb *ghcb, struct es_em_ctxt *ctxt > return ES_OK; > } > > +static enum es_result vc_handle_monitor(struct ghcb *ghcb, > + struct es_em_ctxt *ctxt) > +{ > + phys_addr_t monitor_pa; > + pgd_t *pgd; > + > + pgd = __va(read_cr3_pa()); > + monitor_pa = vc_slow_virt_to_phys(ghcb, ctxt->regs->ax); > + > + ghcb_set_rax(ghcb, monitor_pa); > + ghcb_set_rcx(ghcb, ctxt->regs->cx); > + ghcb_set_rdx(ghcb, ctxt->regs->dx); > + > + return sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0);Why? If SVM has the same behavior as VMX, the MONITOR will be disarmed on VM-Enter, i.e. the VMM can't do anything useful for MONITOR/MWAIT. I assume that's the case given that KVM emulates MONITOR/MWAIT as NOPs on SVM.> +} > + > static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, > struct ghcb *ghcb, > unsigned long exit_code) > @@ -860,6 +876,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, > case SVM_EXIT_WBINVD: > result = vc_handle_wbinvd(ghcb, ctxt); > break; > + case SVM_EXIT_MONITOR: > + result = vc_handle_monitor(ghcb, ctxt); > + break; > case SVM_EXIT_NPF: > result = vc_handle_mmio(ghcb, ctxt); > break; > -- > 2.17.1 >
Borislav Petkov
2020-May-20 08:39 UTC
[PATCH v3 38/75] x86/sev-es: Add SEV-ES Feature Detection
On Tue, Apr 28, 2020 at 05:16:48PM +0200, Joerg Roedel wrote:> +bool sev_es_active(void) > +{ > + return !!(sev_status & MSR_AMD64_SEV_ES_ENABLED); > +} > +EXPORT_SYMBOL_GPL(sev_es_active);I don't see this being used in modules anywhere in the patchset. Or am I missing something? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-20 09:14 UTC
[PATCH v3 40/75] x86/sev-es: Compile early handler code into kernel image
On Tue, Apr 28, 2020 at 05:16:50PM +0200, Joerg Roedel wrote:> +static inline u64 sev_es_rd_ghcb_msr(void) > +{ > + return native_read_msr(MSR_AMD64_SEV_ES_GHCB); > +} > + > +static inline void sev_es_wr_ghcb_msr(u64 val) > +{ > + u32 low, high; > + > + low = (u32)(val); > + high = (u32)(val >> 32); > + > + native_write_msr(MSR_AMD64_SEV_ES_GHCB, low, high); > +}Instead of duplicating those two, you can lift the ones in the compressed image into sev-es.h and use them here. I don't care one bit about the MSR tracepoints in native_*_msr().> +static enum es_result vc_write_mem(struct es_em_ctxt *ctxt, > + char *dst, char *buf, size_t size) > +{ > + unsigned long error_code = X86_PF_PROT | X86_PF_WRITE; > + char __user *target = (char __user *)dst; > + u64 d8; > + u32 d4; > + u16 d2; > + u8 d1; > + > + switch (size) { > + case 1: > + memcpy(&d1, buf, 1); > + if (put_user(d1, target)) > + goto fault; > + break; > + case 2: > + memcpy(&d2, buf, 2); > + if (put_user(d2, target)) > + goto fault; > + break; > + case 4: > + memcpy(&d4, buf, 4); > + if (put_user(d4, target)) > + goto fault; > + break; > + case 8: > + memcpy(&d8, buf, 8); > + if (put_user(d8, target)) > + goto fault;Ok, those (and below) memcpys get nicely optimized to MOVs by the compiler here. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-20 19:22 UTC
[PATCH v3 42/75] x86/sev-es: Setup GHCB based boot #VC handler
On Tue, Apr 28, 2020 at 05:16:52PM +0200, Joerg Roedel wrote:> diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h > index b2cbcd40b52e..e1ed963a57ec 100644 > --- a/arch/x86/include/asm/sev-es.h > +++ b/arch/x86/include/asm/sev-es.h > @@ -74,5 +74,6 @@ static inline u64 lower_bits(u64 val, unsigned int bits) > } > > extern void vc_no_ghcb(void); > +extern bool vc_boot_ghcb(struct pt_regs *regs);Those function names need verbs: handle_vc_no_ghcb handle_vc_boot_ghcb> @@ -161,3 +176,104 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt, > > /* Include code shared with pre-decompression boot stage */ > #include "sev-es-shared.c" > + > +/* > + * This function runs on the first #VC exception after the kernel > + * switched to virtual addresses. > + */ > +static bool __init sev_es_setup_ghcb(void)There's already another sev_es_setup_ghcb() in compressed/. All those functions with the same name are just confusion waiting to happen. Let's prepend the ones in compressed/ with "early_" or so, so that their names are at least different even if they're in two different files with the same name. This way you know at least which function is used in which boot stages.> +{ > + /* First make sure the hypervisor talks a supported protocol. */ > + if (!sev_es_negotiate_protocol()) > + return false;<---- newline here.> + /* > + * Clear the boot_ghcb. The first exception comes in before the bss > + * section is cleared. > + */ > + memset(&boot_ghcb_page, 0, PAGE_SIZE); > + > + /* Alright - Make the boot-ghcb public */ > + boot_ghcb = &boot_ghcb_page; > + > + return true; > +} > + > +static void __init vc_early_vc_forward_exception(struct es_em_ctxt *ctxt)That second "vc" looks redundant.> +{ > + int trapnr = ctxt->fi.vector; > + > + if (trapnr == X86_TRAP_PF) > + native_write_cr2(ctxt->fi.cr2); > + > + ctxt->regs->orig_ax = ctxt->fi.error_code; > + do_early_exception(ctxt->regs, trapnr); > +} > + > +static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, > + struct ghcb *ghcb, > + unsigned long exit_code) > +{ > + enum es_result result; > + > + switch (exit_code) { > + default: > + /* > + * Unexpected #VC exception > + */ > + result = ES_UNSUPPORTED; > + } > + > + return result; > +} > + > +bool __init vc_boot_ghcb(struct pt_regs *regs) > +{ > + unsigned long exit_code = regs->orig_ax; > + struct es_em_ctxt ctxt; > + enum es_result result; > + > + /* Do initial setup or terminate the guest */ > + if (unlikely(boot_ghcb == NULL && !sev_es_setup_ghcb())) > + sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST); > + > + vc_ghcb_invalidate(boot_ghcb);Newline here...> + result = vc_init_em_ctxt(&ctxt, regs, exit_code); > +... remove that one here.> + if (result == ES_OK) > + result = vc_handle_exitcode(&ctxt, boot_ghcb, exit_code);... -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-22 08:33 UTC
[PATCH v3 43/75] x86/sev-es: Setup per-cpu GHCBs for the runtime handler
On Tue, Apr 28, 2020 at 05:16:53PM +0200, Joerg Roedel wrote:> @@ -198,6 +210,48 @@ static bool __init sev_es_setup_ghcb(void) > return true; > } > > +static void __init sev_es_alloc_runtime_data(int cpu) > +{ > + struct sev_es_runtime_data *data; > + > + data = memblock_alloc(sizeof(*data), PAGE_SIZE); > + if (!data) > + panic("Can't allocate SEV-ES runtime data"); > + > + per_cpu(runtime_data, cpu) = data; > +} > + > +static void __init sev_es_init_ghcb(int cpu)Since those are static functions, I'd drop the "sev_es_" prefix from the name for better readability. Because otherwise the whole file is a sea of "sev_es_"-prefixed identifiers which you need to read until the end to know what they are.> +{ > + struct sev_es_runtime_data *data; > + int err; > + > + data = per_cpu(runtime_data, cpu); > + > + err = early_set_memory_decrypted((unsigned long)&data->ghcb_page, > + sizeof(data->ghcb_page)); > + if (err) > + panic("Can not map GHCBs unencrypted");"Error mapping ..."> + > + memset(&data->ghcb_page, 0, sizeof(data->ghcb_page)); > +}-- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-22 09:49 UTC
[PATCH v3 44/75] x86/sev-es: Allocate and Map IST stacks for #VC handler
Dropping thellstrom at vmware.com from Cc from now on because of some microsloth mail rule not delivering my mails. On Tue, Apr 28, 2020 at 05:16:54PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > Allocate and map enough stacks for the #VC handler to support sufficient > levels of nesting and the NMI-in-#VC scenario. > > Also setup the IST entrys for the #VC handler on all CPUs because #VC"entries"> needs to work before cpu_init() has set up the per-cpu TSS.Add a sentence to the commit message pointing to that "VC Handler IST Stacks" comment in the code explaining the justification for the need for IST stacks and the nesting.> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/include/asm/cpu_entry_area.h | 61 +++++++++++++++++++++++++++ > arch/x86/include/asm/page_64_types.h | 1 + > arch/x86/kernel/cpu/common.c | 1 + > arch/x86/kernel/sev-es.c | 40 ++++++++++++++++++ > 4 files changed, 103 insertions(+) > > diff --git a/arch/x86/include/asm/cpu_entry_area.h b/arch/x86/include/asm/cpu_entry_area.h > index 02c0078d3787..85aac6c63653 100644 > --- a/arch/x86/include/asm/cpu_entry_area.h > +++ b/arch/x86/include/asm/cpu_entry_area.h > @@ -64,6 +64,61 @@ enum exception_stack_ordering { > #define CEA_ESTACK_PAGES \ > (sizeof(struct cea_exception_stacks) / PAGE_SIZE) > > +/* > + * VC Handler IST Stacks > + * > + * The IST stacks for the #VC handler are only allocated when SEV-ES is active, > + * so they are not part of 'struct exception_stacks'. > + * > + * The VC handler uses shift_ist so that #VC can be nested. Nesting happens for > + * example when the #VC handler has to call printk in the case of and error or"an"> + * when emulating 'movs' instructions. > + * > + * NMIs are another special case which can cause nesting of #VC handlers. The > + * do_nmi() code path can cause #VC, e.g. for RDPMC. An NMI can also hit in > + * the time window when the #VC handler is raised but before it has shifted its > + * IST entry. To make sure any #VC raised from the NMI code path uses a new > + * stack, the NMI handler unconditionally shifts the #VC handlers IST entry. > + * This can cause one IST stack for #VC to be omitted. > + * > + * To support sufficient levels of nesting for the #VC handler, make the number > + * of nesting levels configurable. It is currently set to 5 to support this > + * scenario: > + * > + * #VC - IST stack 4, IST entry already shifted to 3 > + * > + * -> NMI - shifts #VC IST entry to 2 > + * > + * -> #VC(RDPMC) - shifts #VC IST to 1, something goes wrong, print > + * an error message > + * > + * -> #VC(printk) - shifts #VC IST entry to 0, output driver > + * uses 'movs' > + * > + * -> #VC(movs) - shifts IST to unmapped stack, further #VCs will > + * cause #DF > + * > + */ > +#define N_VC_STACKS 5 > + > +#define VC_STACK_MEMBERS(guardsize, holesize) \ > + char hole[holesize]; \ > + struct { \ > + char guard[guardsize]; \ > + char stack[EXCEPTION_STKSZ]; \ > + } stacks[N_VC_STACKS]; \ > + char top_guard[guardsize]; \ > + > +/* Physical storage */ > +struct vmm_exception_stacks { > + VC_STACK_MEMBERS(0, 0) > +}; > + > +/* Mapping in cpu_entry_area */ > +struct cea_vmm_exception_stacks { > + VC_STACK_MEMBERS(PAGE_SIZE, EXCEPTION_STKSZ) > +};All those things should be under an CONFIG_AMD_MEM_ENCRYPT ifdeffery.> + > #endif > > #ifdef CONFIG_X86_32 > @@ -110,6 +165,12 @@ struct cpu_entry_area { > * Exception stacks used for IST entries with guard pages. > */ > struct cea_exception_stacks estacks; > + > + /* > + * IST Exception stacks for VC handler - Only allocated and mapped when > + * SEV-ES is active. > + */ > + struct cea_vmm_exception_stacks vc_stacks;Ditto. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-22 13:06 UTC
[PATCH v3 45/75] x86/dumpstack/64: Handle #VC exception stacks
On Tue, Apr 28, 2020 at 05:16:55PM +0200, Joerg Roedel wrote:> diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h > index 14db05086bbf..2f3534ef4b5f 100644 > --- a/arch/x86/include/asm/stacktrace.h > +++ b/arch/x86/include/asm/stacktrace.h > @@ -21,6 +21,10 @@ enum stack_type { > STACK_TYPE_ENTRY, > STACK_TYPE_EXCEPTION, > STACK_TYPE_EXCEPTION_LAST = STACK_TYPE_EXCEPTION + N_EXCEPTION_STACKS-1, > +#ifdef CONFIG_X86_64CONFIG_AMD_MEM_ENCRYPT> + STACK_TYPE_VC, > + STACK_TYPE_VC_LAST = STACK_TYPE_VC + N_VC_STACKS - 1, > +#endif > }; > > struct stack_info { > diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c > index 87b97897a881..2468963c1424 100644 > --- a/arch/x86/kernel/dumpstack_64.c > +++ b/arch/x86/kernel/dumpstack_64.c > @@ -18,6 +18,7 @@ > > #include <asm/cpu_entry_area.h> > #include <asm/stacktrace.h> > +#include <asm/sev-es.h> > > static const char * const exception_stack_names[] = { > [ ESTACK_DF ] = "#DF", > @@ -47,6 +48,9 @@ const char *stack_type_name(enum stack_type type) > if (type >= STACK_TYPE_EXCEPTION && type <= STACK_TYPE_EXCEPTION_LAST) > return exception_stack_names[type - STACK_TYPE_EXCEPTION]; > > + if (type >= STACK_TYPE_VC && type <= STACK_TYPE_VC_LAST)That test can be inside vc_stack_name() so that it gets optimized away for !CONFIG_AMD_MEM_ENCRYPT and there's no need for ifdeffery. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-23 07:59 UTC
[PATCH v3 47/75] x86/sev-es: Add Runtime #VC Exception Handler
On Tue, Apr 28, 2020 at 05:16:57PM +0200, Joerg Roedel wrote:> diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index a4fa7f351bf2..bc3a58427028 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -10,6 +10,7 @@ > #include <linux/sched/debug.h> /* For show_regs() */ > #include <linux/percpu-defs.h> > #include <linux/mem_encrypt.h> > +#include <linux/lockdep.h> > #include <linux/printk.h> > #include <linux/mm_types.h> > #include <linux/set_memory.h> > @@ -25,7 +26,7 @@ > #include <asm/insn-eval.h> > #include <asm/fpu/internal.h> > #include <asm/processor.h> > -#include <asm/trap_defs.h> > +#include <asm/traps.h> > #include <asm/svm.h> > > /* For early boot hypervisor communication in SEV-ES enabled guests */ > @@ -46,10 +47,26 @@ struct sev_es_runtime_data { > > /* Physical storage for the per-cpu IST stacks of the #VC handler */ > struct vmm_exception_stacks vc_stacks __aligned(PAGE_SIZE); > + > + /* Reserve on page per CPU as backup storage for the unencrypted GHCB */one> + struct ghcb backup_ghcb;I could use some text explaining what those backups are for?> + /* > + * Mark the per-cpu GHCBs as in-use to detect nested #VC exceptions. > + * There is no need for it to be atomic, because nothing is written to > + * the GHCB between the read and the write of ghcb_active. So it is safe > + * to use it when a nested #VC exception happens before the write. > + */Looks liks that is that text... support for nested #VC exceptions. I'm sure this has come up already but why do we even want to support nested #VCs? IOW, can we do without them first or are they absolutely necessary? I'm guessing VC exceptions inside the VC handler but what are the sensible use cases? Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-23 09:23 UTC
[PATCH v3 49/75] x86/sev-es: Handle instruction fetches from user-space
On Tue, Apr 28, 2020 at 05:16:59PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > When a #VC exception is triggered by user-space the instruction decoder > needs to read the instruction bytes from user addresses. Enhance > vc_decode_insn() to safely fetch kernel and user instructions. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es.c | 31 ++++++++++++++++++++++--------- > 1 file changed, 22 insertions(+), 9 deletions(-) > > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index 85027fb4177e..c2223c2a28c2 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -165,17 +165,30 @@ static enum es_result vc_decode_insn(struct es_em_ctxt *ctxt) > enum es_result ret; > int res; > > - res = vc_fetch_insn_kernel(ctxt, buffer); > - if (unlikely(res == -EFAULT)) {Let's also test for 0 in case the probe_read* guts get changed and start returning so other errval besides -EFAULT.> - ctxt->fi.vector = X86_TRAP_PF; > - ctxt->fi.error_code = 0; > - ctxt->fi.cr2 = ctxt->regs->ip; > - return ES_EXCEPTION; > + if (!user_mode(ctxt->regs)) {Flip that check so that it reads more naturally: if (user_mode(..) insn_fetch_from_user() ... } else { vc_fetch_insn_kernel() }> + res = vc_fetch_insn_kernel(ctxt, buffer);> + if (unlikely(res == -EFAULT)) { > + ctxt->fi.vector = X86_TRAP_PF; > + ctxt->fi.error_code = 0; > + ctxt->fi.cr2 = ctxt->regs->ip; > + return ES_EXCEPTION; > + } > + > + insn_init(&ctxt->insn, buffer, MAX_INSN_SIZE - res, 1); > + insn_get_length(&ctxt->insn); > + } else { > + res = insn_fetch_from_user(ctxt->regs, buffer); > + if (res == 0) {if (!res) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
On Tue, Apr 28, 2020 at 05:17:01PM +0200, Joerg Roedel wrote:> +static enum es_result vc_do_mmio(struct ghcb *ghcb, struct es_em_ctxt *ctxt, > + unsigned int bytes, bool read) > +{ > + u64 exit_code, exit_info_1, exit_info_2; > + unsigned long ghcb_pa = __pa(ghcb); > + void __user *ref; > + > + ref = insn_get_addr_ref(&ctxt->insn, ctxt->regs); > + if (ref == (void __user *)-1L) > + return ES_UNSUPPORTED; > + > + exit_code = read ? SVM_VMGEXIT_MMIO_READ : SVM_VMGEXIT_MMIO_WRITE; > + > + exit_info_1 = vc_slow_virt_to_phys(ghcb, (unsigned long)ref); > + exit_info_2 = bytes; /* Can never be greater than 8 */No trailing comments pls - put them over the line.> + ghcb->save.sw_scratch = ghcb_pa + offsetof(struct ghcb, shared_buffer); > + > + return sev_es_ghcb_hv_call(ghcb, ctxt, exit_code, exit_info_1, exit_info_2); > +} > + > +static enum es_result vc_handle_mmio_twobyte_ops(struct ghcb *ghcb, > + struct es_em_ctxt *ctxt) > +{ > + struct insn *insn = &ctxt->insn; > + unsigned int bytes = 0; > + enum es_result ret; > + int sign_byte; > + long *reg_data; > + > + switch (insn->opcode.bytes[1]) { > + /* MMIO Read w/ zero-extension */ > + case 0xb6: > + bytes = 1; > + /* Fallthrough */I'm guessing we're supposed to annotate it this way now: WARNING: Prefer 'fallthrough;' over fallthrough comment #139: FILE: arch/x86/kernel/sev-es.c:504: + /* Fallthrough */> + case 0xb7: > + if (!bytes) > + bytes = 2; > + > + ret = vc_do_mmio(ghcb, ctxt, bytes, true); > + if (ret) > + break; > + > + /* Zero extend based on operand size */ > + reg_data = vc_insn_get_reg(ctxt);That function can return NULL - you need to test reg_data. Ditto for all its invocations. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-25 09:47 UTC
[PATCH v3 52/75] x86/sev-es: Handle MMIO String Instructions
On Tue, Apr 28, 2020 at 05:17:02PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > Add handling for emulation the MOVS instruction on MMIO regions, as done > by the memcpy_toio() and memcpy_fromio() functions. > > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es.c | 78 ++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 78 insertions(+) > > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index e3662723ed76..84958a82f8e0 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -552,6 +552,74 @@ static enum es_result vc_handle_mmio_twobyte_ops(struct ghcb *ghcb, > return ret; > } > > +/* > + * The MOVS instruction has two memory operands, which raises the > + * problem that it is not known whether the access to the source or the > + * destination caused the #VC exception (and hence whether an MMIO read > + * or write operation needs to be emulated). > + * > + * Instead of playing games with walking page-tables and trying to guess > + * whether the source or destination is an MMIO range, this code splitss/this code splits/split/> + * the move into two operations, a read and a write with only one > + * memory operand. This will cause a nested #VC exception on the MMIO > + * address which can then be handled. > + * > + * This implementation has the benefit that it also supports MOVS where > + * source _and_ destination are MMIO regions. > + * > + * It will slow MOVS on MMIO down a lot, but in SEV-ES guests it is a > + * rare operation. If it turns out to be a performance problem the split > + * operations can be moved to memcpy_fromio() and memcpy_toio(). > + */ > +static enum es_result vc_handle_mmio_movs(struct es_em_ctxt *ctxt, > + unsigned int bytes) > +{ > + unsigned long ds_base, es_base; > + unsigned char *src, *dst; > + unsigned char buffer[8]; > + enum es_result ret; > + bool rep; > + int off; > + > + ds_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_DS); > + es_base = insn_get_seg_base(ctxt->regs, INAT_SEG_REG_ES); > + > + if (ds_base == -1L || es_base == -1L) { > + ctxt->fi.vector = X86_TRAP_GP; > + ctxt->fi.error_code = 0; > + return ES_EXCEPTION; > + } > + > + src = ds_base + (unsigned char *)ctxt->regs->si; > + dst = es_base + (unsigned char *)ctxt->regs->di; > + > + ret = vc_read_mem(ctxt, src, buffer, bytes); > + if (ret != ES_OK) > + return ret; > + > + ret = vc_write_mem(ctxt, dst, buffer, bytes); > + if (ret != ES_OK) > + return ret; > + > + if (ctxt->regs->flags & X86_EFLAGS_DF) > + off = -bytes; > + else > + off = bytes; > + > + ctxt->regs->si += off; > + ctxt->regs->di += off; > + > + rep = insn_has_rep_prefix(&ctxt->insn); > +^ Superfluous newline.> + if (rep) > + ctxt->regs->cx -= 1; > + > + if (!rep || ctxt->regs->cx == 0) > + return ES_OK; > + else > + return ES_RETRY; > +} > + > static enum es_result vc_handle_mmio(struct ghcb *ghcb, > struct es_em_ctxt *ctxt) > { > @@ -606,6 +674,16 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb, > memcpy(reg_data, ghcb->shared_buffer, bytes); > break; > > + /* MOVS instruction */ > + case 0xa4: > + bytes = 1; > + /* Fallthrough */WARNING: Prefer 'fallthrough;' over fallthrough comment #120: FILE: arch/x86/kernel/sev-es.c:680: + /* Fallthrough */ -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
On Tue, Apr 28, 2020 at 05:17:03PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Implement a handler for #VC exceptions caused by RDMSR/WRMSR > instructions. > > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: Adapt to #VC handling infrastructure ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es.c | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index 84958a82f8e0..e43bba4c7d79 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -316,6 +316,31 @@ static phys_addr_t vc_slow_virt_to_phys(struct ghcb *ghcb, unsigned long vaddr) > /* Include code shared with pre-decompression boot stage */ > #include "sev-es-shared.c" > > +static enum es_result vc_handle_msr(struct ghcb *ghcb, struct es_em_ctxt *ctxt) > +{ > + struct pt_regs *regs = ctxt->regs; > + enum es_result ret; > + u64 exit_info_1; > +A comment pls: /* Is it a WRMSR? */> + exit_info_1 = (ctxt->insn.opcode.bytes[1] == 0x30) ? 1 : 0; > + > + ghcb_set_rcx(ghcb, regs->cx); > + if (exit_info_1) { > + ghcb_set_rax(ghcb, regs->ax); > + ghcb_set_rdx(ghcb, regs->dx); > + exit_info_1 = 1;No need to set it again - you just did above. :) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-May-25 10:59 UTC
[PATCH v3 54/75] x86/sev-es: Handle DR7 read/write events
On Tue, Apr 28, 2020 at 05:17:04PM +0200, Joerg Roedel wrote:> +static enum es_result vc_handle_dr7_write(struct ghcb *ghcb, > + struct es_em_ctxt *ctxt) > +{ > + struct sev_es_runtime_data *data = this_cpu_read(runtime_data); > + long val, *reg = vc_insn_get_rm(ctxt); > + enum es_result ret; > + > + if (!reg) > + return ES_DECODE_FAILED; > + > + val = *reg; > + > + /* Upper 32 bits must be written as zeroes */ > + if (val >> 32) { > + ctxt->fi.vector = X86_TRAP_GP; > + ctxt->fi.error_code = 0; > + return ES_EXCEPTION; > + } > + > + /* Clear out other reservered bits and set bit 10 */"reserved"> + val = (val & 0xffff23ffL) | BIT(10); > + > + /* Early non-zero writes to DR7 are not supported */ > + if (!data && (val & ~DR7_RESET_VALUE)) > + return ES_UNSUPPORTED; > + > + /* Using a value of 0 for ExitInfo1 means RAX holds the value */ > + ghcb_set_rax(ghcb, val); > + ret = sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_WRITE_DR7, 0, 0); > + if (ret != ES_OK) > + return ret; > + > + if (data) > + data->dr7 = val;Are we still returning ES_OK if !data?> + > + return ES_OK; > +}-- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Tom Lendacky
2020-May-27 15:34 UTC
[PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
On 4/28/20 10:17 AM, Joerg Roedel wrote:> From: Mike Stunes <mstunes at vmware.com> > > To avoid a future VMEXIT for a subsequent CPUID function, cache the > results returned by CPUID into an xarray. > > [tl: coding standard changes, register zero extension] > > Signed-off-by: Mike Stunes <mstunes at vmware.com> > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: - Wrapped cache handling into vc_handle_cpuid_cached() > - Used lower_32_bits() where applicable > - Moved cache_index out of struct es_em_ctxt ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es-shared.c | 12 ++-- > arch/x86/kernel/sev-es.c | 119 +++++++++++++++++++++++++++++++- > 2 files changed, 124 insertions(+), 7 deletions(-) > > diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c > index 5bfc1f3030d4..cfdafe12da4f 100644 > --- a/arch/x86/kernel/sev-es-shared.c > +++ b/arch/x86/kernel/sev-es-shared.c > @@ -427,8 +427,8 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb, > u32 cr4 = native_read_cr4(); > enum es_result ret; > > - ghcb_set_rax(ghcb, regs->ax); > - ghcb_set_rcx(ghcb, regs->cx); > + ghcb_set_rax(ghcb, lower_32_bits(regs->ax)); > + ghcb_set_rcx(ghcb, lower_32_bits(regs->cx)); > > if (cr4 & X86_CR4_OSXSAVE) > /* Safe to read xcr0 */ > @@ -447,10 +447,10 @@ static enum es_result vc_handle_cpuid(struct ghcb *ghcb, > ghcb_is_valid_rdx(ghcb))) > return ES_VMM_ERROR; > > - regs->ax = ghcb->save.rax; > - regs->bx = ghcb->save.rbx; > - regs->cx = ghcb->save.rcx; > - regs->dx = ghcb->save.rdx; > + regs->ax = lower_32_bits(ghcb->save.rax); > + regs->bx = lower_32_bits(ghcb->save.rbx); > + regs->cx = lower_32_bits(ghcb->save.rcx); > + regs->dx = lower_32_bits(ghcb->save.rdx); > > return ES_OK; > } > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index 03095bc7b563..0303834d4811 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -19,6 +19,7 @@ > #include <linux/memblock.h> > #include <linux/kernel.h> > #include <linux/mm.h> > +#include <linux/xarray.h> > > #include <generated/asm-offsets.h> > #include <asm/cpu_entry_area.h> > @@ -33,6 +34,16 @@ > > #define DR7_RESET_VALUE 0x400 > > +struct sev_es_cpuid_cache_entry { > + unsigned long eax; > + unsigned long ebx; > + unsigned long ecx; > + unsigned long edx; > +}; > + > +static struct xarray sev_es_cpuid_cache; > +static bool __ro_after_init sev_es_cpuid_cache_initialized; > + > /* For early boot hypervisor communication in SEV-ES enabled guests */ > static struct ghcb boot_ghcb_page __bss_decrypted __aligned(PAGE_SIZE); > > @@ -463,6 +474,9 @@ void __init sev_es_init_vc_handling(void) > sev_es_setup_vc_stack(cpu); > } > > + xa_init_flags(&sev_es_cpuid_cache, XA_FLAGS_LOCK_IRQ); > + sev_es_cpuid_cache_initialized = true; > + > init_vc_stack_names(); > } > > @@ -744,6 +758,91 @@ static enum es_result vc_handle_mmio(struct ghcb *ghcb, > return ret; > } > > +static unsigned long sev_es_get_cpuid_cache_index(struct es_em_ctxt *ctxt) > +{ > + unsigned long hi, lo; > + > + /* Don't attempt to cache until the xarray is initialized */ > + if (!sev_es_cpuid_cache_initialized) > + return ULONG_MAX; > + > + lo = lower_32_bits(ctxt->regs->ax); > + > + /* > + * CPUID 0x0000000d requires both RCX and XCR0, so it can't be > + * cached. > + */ > + if (lo == 0x0000000d) > + return ULONG_MAX; > + > + /* > + * Some callers of CPUID don't always set RCX to zero for CPUID > + * functions that don't require RCX, which can result in excessive > + * cached values, so RCX needs to be manually zeroed for use as part > + * of the cache index. Future CPUID values may need RCX, but since > + * they can't be known, they must not be cached. > + */ > + if (lo > 0x80000020) > + return ULONG_MAX; > + > + switch (lo) { > + case 0x00000007: > + case 0x0000000b: > + case 0x0000000f: > + case 0x00000010: > + case 0x8000001d: > + case 0x80000020: > + hi = ctxt->regs->cx << 32; > + break; > + default: > + hi = 0; > + } > + > + return hi | lo; > +} > + > +static bool sev_es_check_cpuid_cache(struct es_em_ctxt *ctxt, > + unsigned long cache_index) > +{ > + struct sev_es_cpuid_cache_entry *cache_entry; > + > + if (cache_index == ULONG_MAX) > + return false; > + > + cache_entry = xa_load(&sev_es_cpuid_cache, cache_index); > + if (!cache_entry) > + return false; > + > + ctxt->regs->ax = cache_entry->eax; > + ctxt->regs->bx = cache_entry->ebx; > + ctxt->regs->cx = cache_entry->ecx; > + ctxt->regs->dx = cache_entry->edx; > + > + return true; > +} > + > +static void sev_es_add_cpuid_cache(struct es_em_ctxt *ctxt, > + unsigned long cache_index) > +{ > + struct sev_es_cpuid_cache_entry *cache_entry; > + int ret; > + > + if (cache_index == ULONG_MAX) > + return; > + > + cache_entry = kzalloc(sizeof(*cache_entry), GFP_ATOMIC); > + if (cache_entry) { > + cache_entry->eax = ctxt->regs->ax; > + cache_entry->ebx = ctxt->regs->bx; > + cache_entry->ecx = ctxt->regs->cx; > + cache_entry->edx = ctxt->regs->dx; > + > + /* Ignore insertion errors */ > + ret = xa_insert(&sev_es_cpuid_cache, cache_index, > + cache_entry, GFP_ATOMIC);Just realized, that on error, the cache_entry should be freed. Thanks, Tom> + } > +} > + > static enum es_result vc_handle_dr7_write(struct ghcb *ghcb, > struct es_em_ctxt *ctxt) > { > @@ -895,6 +994,24 @@ static enum es_result vc_handle_trap_db(struct ghcb *ghcb, > return ES_EXCEPTION; > } > > +static enum es_result vc_handle_cpuid_cached(struct ghcb *ghcb, > + struct es_em_ctxt *ctxt) > +{ > + unsigned long cache_index; > + enum es_result result; > + > + cache_index = sev_es_get_cpuid_cache_index(ctxt); > + > + if (sev_es_check_cpuid_cache(ctxt, cache_index)) > + return ES_OK; > + > + result = vc_handle_cpuid(ghcb, ctxt); > + if (result == ES_OK) > + sev_es_add_cpuid_cache(ctxt, cache_index); > + > + return result; > +} > + > static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, > struct ghcb *ghcb, > unsigned long exit_code) > @@ -926,7 +1043,7 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, > result = ES_UNSUPPORTED; > break; > case SVM_EXIT_CPUID: > - result = vc_handle_cpuid(ghcb, ctxt); > + result = vc_handle_cpuid_cached(ghcb, ctxt); > break; > case SVM_EXIT_IOIO: > result = vc_handle_ioio(ghcb, ctxt); >
Borislav Petkov
2020-May-28 12:38 UTC
[PATCH v3 67/75] x86/vmware: Add VMware specific handling for VMMCALL under SEV-ES
On Tue, Apr 28, 2020 at 05:17:17PM +0200, Joerg Roedel wrote:> From: Doug Covelli <dcovelli at vmware.com> > > This change adds VMware specific handling for #VC faults caused bys/This change adds/Add/ -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
On Tue, Apr 28, 2020 at 05:17:19PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Setup the AP jump table to point to the SEV-ES trampoline code so that > the APs can boot.Tom, in his laconic way, doesn't want to explain to us why is this even needed... :) /me reads the code /me reads the GHCB spec aha, it gets it from the HV. And it can be set by the guest too... So how about expanding that commit message as to why this is done, why needed, etc? Thx.> diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c > index 262f83cad355..1c5cbfd102d5 100644 > --- a/arch/x86/realmode/init.c > +++ b/arch/x86/realmode/init.c > @@ -9,6 +9,7 @@ > #include <asm/realmode.h> > #include <asm/tlbflush.h> > #include <asm/crash.h> > +#include <asm/sev-es.h> > > struct real_mode_header *real_mode_header; > u32 *trampoline_cr4_features; > @@ -107,6 +108,11 @@ static void __init setup_real_mode(void) > if (sme_active()) > trampoline_header->flags |= TH_FLAGS_SME_ACTIVE; > > + if (sev_es_active()) { > + if (sev_es_setup_ap_jump_table(real_mode_header)) > + panic("Failed to update SEV-ES AP Jump Table"); > + } > +So this function gets slowly sprinkled with if (sev-something) bla Please wrap at least those last two into a sev_setup_real_mode() or so. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-Jun-02 15:46 UTC
[PATCH v3 70/75] x86/head/64: Setup TSS early for secondary CPUs
On Tue, Apr 28, 2020 at 05:17:20PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > The #VC exception will trigger very early in head_64.S, when the first > CPUID instruction is executed. When secondary CPUs boot, they already > load the real system IDT, which has the #VC handler configured to be > using an IST stack. IST stacks require a TSS to be loaded, to set up the > TSS early for bringing up the secondary CPUs. Use the RW version of > early, until cpu_init() switches to the RO mapping.I think you wanna say "Use the read-write version of the per-CPU TSS struct early." here. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-Jun-03 09:54 UTC
[PATCH v3 73/75] x86/sev-es: Support CPU offline/online
On Tue, Apr 28, 2020 at 05:17:23PM +0200, Joerg Roedel wrote:> From: Joerg Roedel <jroedel at suse.de> > > Add a play_dead handler when running under SEV-ES. This is needed > because the hypervisor can't deliver an SIPI request to restart the AP. > Instead the kernel has to issue a VMGEXIT to halt the VCPU. When the > hypervisor would deliver and SIPI is wakes up the VCPU instead.That last sentence needs fixing. Also, that explanation belongs as comment over sev_es_ap_hlt_loop() because commit messages are not that easy to find.> Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/include/uapi/asm/svm.h | 1 + > arch/x86/kernel/sev-es.c | 58 +++++++++++++++++++++++++++++++++ > 2 files changed, 59 insertions(+) > > diff --git a/arch/x86/include/uapi/asm/svm.h b/arch/x86/include/uapi/asm/svm.h > index a19ce9681ec2..20a05839dd9a 100644 > --- a/arch/x86/include/uapi/asm/svm.h > +++ b/arch/x86/include/uapi/asm/svm.h > @@ -84,6 +84,7 @@ > /* SEV-ES software-defined VMGEXIT events */ > #define SVM_VMGEXIT_MMIO_READ 0x80000001 > #define SVM_VMGEXIT_MMIO_WRITE 0x80000002 > +#define SVM_VMGEXIT_AP_HLT_LOOP 0x80000004 > #define SVM_VMGEXIT_AP_JUMP_TABLE 0x80000005 > #define SVM_VMGEXIT_SET_AP_JUMP_TABLE 0 > #define SVM_VMGEXIT_GET_AP_JUMP_TABLE 1 > diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index 28725c38e6fb..00a5d0483730 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -32,6 +32,8 @@ > #include <asm/processor.h> > #include <asm/traps.h> > #include <asm/svm.h> > +#include <asm/smp.h> > +#include <asm/cpu.h> > > #define DR7_RESET_VALUE 0x400 > > @@ -448,6 +450,60 @@ static bool __init sev_es_setup_ghcb(void) > return true; > } > > +#ifdef CONFIG_HOTPLUG_CPU > +static void sev_es_ap_hlt_loop(void) > +{ > + struct ghcb_state state; > + struct ghcb *ghcb; > + > + ghcb = sev_es_get_ghcb(&state); > + > + while (true) { > + vc_ghcb_invalidate(ghcb); > + ghcb_set_sw_exit_code(ghcb, SVM_VMGEXIT_AP_HLT_LOOP); > + ghcb_set_sw_exit_info_1(ghcb, 0); > + ghcb_set_sw_exit_info_2(ghcb, 0); > + > + sev_es_wr_ghcb_msr(__pa(ghcb)); > + VMGEXIT(); > + > + /* Wakup Signal? */"Wakeup"> + if (ghcb_is_valid_sw_exit_info_2(ghcb) && > + ghcb->save.sw_exit_info_2 != 0)No need for the "!= 0".> + break; > + } > + > + sev_es_put_ghcb(&state); > +}... -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
On Tue, Apr 28, 2020 at 05:17:24PM +0200, Joerg Roedel wrote:> diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c > index 27d1016ec840..8898002e5600 100644 > --- a/arch/x86/kernel/nmi.c > +++ b/arch/x86/kernel/nmi.c > @@ -511,6 +511,13 @@ NOKPROBE_SYMBOL(is_debug_stack); > dotraplinkage notrace void > do_nmi(struct pt_regs *regs, long error_code) > { > + /* > + * Re-enable NMIs right here when running as an SEV-ES guest. This might > + * cause nested NMIs, but those can be handled safely. > + */ > + if (sev_es_active()) > + sev_es_nmi_complete();Pls move the comment and the sev_es_active() check into the sev_es_nmi_complete() function. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Borislav Petkov
2020-Jun-03 13:52 UTC
[PATCH v3 75/75] x86/efi: Add GHCB mappings when SEV-ES is active
On Tue, Apr 28, 2020 at 05:17:25PM +0200, Joerg Roedel wrote:> From: Tom Lendacky <thomas.lendacky at amd.com> > > Calling down to EFI runtime services can result in the firmware performing > VMGEXIT calls. The firmware is likely to use the GHCB of the OS (e.g., for > setting EFI variables), so each GHCB in the system needs to be identity > mapped in the EFI page tables, as unencrypted, to avoid page faults....> diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c > index eef6e2196ef4..3b62714723b5 100644 > --- a/arch/x86/kernel/sev-es.c > +++ b/arch/x86/kernel/sev-es.c > @@ -422,6 +422,31 @@ int sev_es_setup_ap_jump_table(struct real_mode_header *rmh) > return 0; > } >Trusting the firmware is never a good decision but we've established on IRC that *this* firmware is in OVMF and is going to be part of the guest measurement so if there's trouble we can always fix it, as opposed to the actual firmware in the chip. Please add some blurb above this function about it so that it is clear what kind of EFI firmware it is about here.> +int __init sev_es_efi_map_ghcbs(pgd_t *pgd) > +{ > + struct sev_es_runtime_data *data; > + unsigned long address, pflags; > + int cpu; > + u64 pfn; > + > + if (!sev_es_active()) > + return 0; > + > + pflags = _PAGE_NX | _PAGE_RW; > + > + for_each_possible_cpu(cpu) { > + data = per_cpu(runtime_data, cpu); > + > + address = __pa(&data->ghcb_page); > + pfn = address >> PAGE_SHIFT; > + > + if (kernel_map_pages_in_pgd(pgd, pfn, address, 1, pflags)) > + return 1; > + } > + > + return 0; > +}Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
Joerg Roedel
2020-Jun-12 09:12 UTC
[PATCH v3 64/75] x86/sev-es: Cache CPUID results for improved performance
On Tue, Apr 28, 2020 at 05:17:14PM +0200, Joerg Roedel wrote:> From: Mike Stunes <mstunes at vmware.com> > > To avoid a future VMEXIT for a subsequent CPUID function, cache the > results returned by CPUID into an xarray. > > [tl: coding standard changes, register zero extension] > > Signed-off-by: Mike Stunes <mstunes at vmware.com> > Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> > [ jroedel at suse.de: - Wrapped cache handling into vc_handle_cpuid_cached() > - Used lower_32_bits() where applicable > - Moved cache_index out of struct es_em_ctxt ] > Co-developed-by: Joerg Roedel <jroedel at suse.de> > Signed-off-by: Joerg Roedel <jroedel at suse.de> > --- > arch/x86/kernel/sev-es-shared.c | 12 ++-- > arch/x86/kernel/sev-es.c | 119 +++++++++++++++++++++++++++++++- > 2 files changed, 124 insertions(+), 7 deletions(-)Okay, following the discussion, I am dropping this patch for now. We can revisit CPUID caching later when we have a better justification. Regards, Joerg
Reasonably Related Threads
- [PATCH v3 24/75] x86/boot/compressed/64: Unmap GHCB page before booting the kernel
- [PATCH v3 24/75] x86/boot/compressed/64: Unmap GHCB page before booting the kernel
- [PATCH v3 24/75] x86/boot/compressed/64: Unmap GHCB page before booting the kernel
- [PATCH v4 14/75] x86/boot/compressed/64: Add page-fault handler
- [PATCH 14/70] x86/boot/compressed/64: Add page-fault handler