search for: x86_pf_prot

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-fau...

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-fau...

...v Petkov wrote: > 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) > > +...

...ss); + + 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:"); + el...

...nsn, 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; +...

...n 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: > + mem...

...n 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: > + mem...

...uot;); +} + +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)) + do_pf_error("Unexpected page-fault:", error_code, address, regs->ip); + + /* + * 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/...

...signed long address = native_read_cr2(); > + unsigned long error_code = regs->orig_ax; > + > + /* > + * 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)) > + pf_error(error_code, address, regs); > + > + /* > + * 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/b...

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

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

From: Joerg Roedel <jroedel at suse.de> Hi, here is the new version of the SEV-ES client enabling patch-set. It is based on the latest tip/master branch and contains the necessary changes. In particular those ar: - Enabling CR4.FSGSBASE early on supported processors so that early #VC exceptions on APs can be handled. - Add another patch (patch 1) to fix a KVM frame-size build

From: Joerg Roedel <jroedel at suse.de> Hi, here is a new version of the SEV-ES Guest Support patches for x86. The previous versions can be found as a linked list starting here: https://lore.kernel.org/lkml/20200824085511.7553-1-joro at 8bytes.org/ I updated the patch-set based on ther review comments I got and the discussions around it. Another important change is that the early IDT

From: Joerg Roedel <jroedel at suse.de> Hi, here is a new version of the SEV-ES Guest Support patches for x86. The previous versions can be found as a linked list starting here: https://lore.kernel.org/lkml/20200824085511.7553-1-joro at 8bytes.org/ I updated the patch-set based on ther review comments I got and the discussions around it. Another important change is that the early IDT

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.