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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/kvm/emulate.c | |
| parent | d5ae7ce835cc89556dc18e2070e754f026402efa (diff) | |
| download | blackbird-op-linux-1cb3f3ae5a3855ba430430706da4201ace1d6ec4.tar.gz blackbird-op-linux-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/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a10950a37928..8547958e3582 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3702,6 +3702,11 @@ done: return (rc != X86EMUL_CONTINUE) ? EMULATION_FAILED : EMULATION_OK; } +bool x86_page_table_writing_insn(struct x86_emulate_ctxt *ctxt) +{ + return ctxt->d & PageTable; +} + static bool string_insn_completed(struct x86_emulate_ctxt *ctxt) { /* The second termination condition only applies for REPE |
