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| author |   Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-09-22 17:02:48 +0800 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2011-12-27 11:16:50 +0200 |
| commit | 1cb3f3ae5a3855ba430430706da4201ace1d6ec4 (patch) | |
| tree | 1ff844904958cf669c86650da4601eb392f14a91 /arch/x86/include/asm/kvm_emulate.h | |
| parent | KVM: x86: tag the instructions which are used to write page table (diff) | |
| download | linux-dev-1cb3f3ae5a3855ba430430706da4201ace1d6ec4.tar.xz linux-dev-1cb3f3ae5a3855ba430430706da4201ace1d6ec4.zip | |
KVM: x86: retry non-page-table writing instructions
If the emulation is caused by #PF and it is non-page_table writing instruction,
it means the VM-EXIT is caused by shadow page protected, we can zap the shadow
page and retry this instruction directly
The idea is from Avi
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_emulate.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index a026507893e9..9a4acf41709c 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -364,6 +364,7 @@ enum x86_intercept { #endif int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len); +bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt); #define EMULATION_FAILED -1 #define EMULATION_OK 0 #define EMULATION_RESTART 1 |