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| author | Joerg Roedel <jroedel@suse.de> | 2021-05-19 15:52:45 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-05-19 17:13:04 +0200 |
| commit | c25bbdb564060adaad5c3a8a10765c13487ba6a3 (patch) | |
| tree | 64734ece786149aba77e6c38089cee109f8fa86b /arch/x86 | |
| parent | b250f2f7792d15bcde98e0456781e2835556d5fa (diff) | |
| download | linux-c25bbdb564060adaad5c3a8a10765c13487ba6a3.tar.gz | |
x86/sev-es: Forward page-faults which happen during emulation
When emulating guest instructions for MMIO or IOIO accesses, the #VC
handler might get a page-fault and will not be able to complete. Forward
the page-fault in this case to the correct handler instead of killing
the machine.
Fixes: 0786138c78e7 ("x86/sev-es: Add a Runtime #VC Exception Handler")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org # v5.10+
Link: https://lkml.kernel.org/r/20210519135251.30093-3-joro@8bytes.org
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/sev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c index 82bced88153b..1f428f401bed 100644 --- a/arch/x86/kernel/sev.c +++ b/arch/x86/kernel/sev.c @@ -1270,6 +1270,10 @@ static __always_inline void vc_forward_exception(struct es_em_ctxt *ctxt) case X86_TRAP_UD: exc_invalid_op(ctxt->regs); break; + case X86_TRAP_PF: + write_cr2(ctxt->fi.cr2); + exc_page_fault(ctxt->regs, error_code); + break; case X86_TRAP_AC: exc_alignment_check(ctxt->regs, error_code); break; |