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KVM: SVM: copy instruction bytes from VMCB

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In case of a nested page fault or an intercepted #PF newer SVM
implementations provide a copy of the faulting instruction bytes
in the VMCB.
Use these bytes to feed the instruction emulator and avoid the costly
guest instruction fetch in this case.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Andre Przywara 2010-12-21 11:12:07 +01:00 • committed by Avi Kivity
commit dc25e89e07
8 changed files with 26 additions and 15 deletions
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4
arch/x86/include/asm/svm.h
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@ -83,7 +83,9 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
u32 clean;
u32 reserved_5;
u64 next_rip;
u8 reserved_6[816];
u8 insn_len;
u8 insn_bytes[15];
u8 reserved_6[800];
};