search for: boot_gdt

...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 */ > + .qu...

...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 */ > + .qu...

...edel 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 0x00cf92000000fff...

...arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -72,6 +72,20 @@ 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) + + /* GDT loaded - 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...

...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...

...lude/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...

...> @@ -72,6 +72,20 @@ 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) > + > + /* GDT loaded - switch to __KERNEL_CS so IRET works reliably */ > + pushq $__KERNEL_CS > + leaq .Lon_kernel_cs(%rip), %rax > + pushq %rax > +...

...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 5b577d6bce7a..8b43ed0592e8 100644 --- a/arch/x86/kerne...

...hanged, 19 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 8d5bf7c568a4..a708107688a2 100644 --- a/arch/x86/kerne...

...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 5b577d6bce7a.....

...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 5b577d6bce7a.....

...dt-cleanups-use-per-cpu-variables-for-gdt-pda.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot-fix.patch i386-gdt-cleanups-clean-up-cpu_init.patch i386-gdt-cleanups-cleanup-gdt-access.patch i386-gdt-cleanups-rename-boot_gdt_table-to-boot_gdt.patch +i386-gdt-cleanups-page-align-the-gdt.patch +i386-convert-pda-into-the-percpu-section.patch +lguest-use-percpu.patch +i386-cleanups-to-help-using-per-cpu-variables-from-asm.patch +percpu-define-per_cpu_offset.patch The quick summary of each patch is: i386-gdt-cleanups...

...dt-cleanups-use-per-cpu-variables-for-gdt-pda.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot.patch i386-gdt-cleanups-use-per-cpu-gdt-immediately-upon-boot-fix.patch i386-gdt-cleanups-clean-up-cpu_init.patch i386-gdt-cleanups-cleanup-gdt-access.patch i386-gdt-cleanups-rename-boot_gdt_table-to-boot_gdt.patch +i386-gdt-cleanups-page-align-the-gdt.patch +i386-convert-pda-into-the-percpu-section.patch +lguest-use-percpu.patch +i386-cleanups-to-help-using-per-cpu-variables-from-asm.patch +percpu-define-per_cpu_offset.patch The quick summary of each patch is: i386-gdt-cleanups...

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

Hi, here is the first public post of the patch-set to enable Linux to run under SEV-ES enabled hypervisors. The code is mostly feature-complete, but there are still a couple of bugs to fix. Nevertheless, given the size of the patch-set, I think it is about time to ask for initial feedback of the changes that come with it. To better understand the code here is a quick explanation of SEV-ES first.

From: Joerg Roedel <jroedel at suse.de> Hi, here is the fourth version of the SEV-ES Guest Support patches. I addressed the review comments sent to me for the previous version and rebased the code v5.8-rc5. The biggest change in this version is the IST handling code for the #VC handler. I adapted the entry code for the #VC handler to the big pile of entry code changes merged into

From: Joerg Roedel <jroedel at suse.de> Hi, here is the fourth version of the SEV-ES Guest Support patches. I addressed the review comments sent to me for the previous version and rebased the code v5.8-rc5. The biggest change in this version is the IST handling code for the #VC handler. I adapted the entry code for the #VC handler to the big pile of entry code changes merged into

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

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

From: Joerg Roedel <jroedel at suse.de> Hi, here is a rebased version of the latest SEV-ES patches. They are now based on latest tip/master instead of upstream Linux and include the necessary changes. Changes to v4 are in particular: - Moved early IDT setup code to idt.c, because the idt_descr and the idt_table are now static - This required to make stack protector work early (or