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| author | Andre Przywara <andre.przywara@amd.com> | 2010-12-21 11:12:07 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:31:07 +0200 |
| commit | dc25e89e07d5ef31c476117d2c76b34dbb22196c (patch) | |
| tree | 9fef452c4bd0704b9d74512a9a58dc5d5b742d53 /arch/x86/kvm/mmu.c | |
| parent | df4f3108562dc6f6ae6648f2698df7f4c9acf52d (diff) | |
| download | lwn-dc25e89e07d5ef31c476117d2c76b34dbb22196c.tar.gz lwn-dc25e89e07d5ef31c476117d2c76b34dbb22196c.zip | |
KVM: SVM: copy instruction bytes from VMCB
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>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 01c5a104031f..ea6063d9242e 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3330,7 +3330,8 @@ void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu) } } -int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code) +int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code, + void *insn, int insn_len) { int r; enum emulation_result er; @@ -3348,7 +3349,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code) if (r) goto out; - er = x86_emulate_instruction(vcpu, cr2, 0); + er = x86_emulate_instruction(vcpu, cr2, 0, insn, insn_len); switch (er) { case EMULATE_DONE: |