diff options
| author | Andre Przywara | 2010-12-21 11:12:07 +0100 |
|---|---|---|
| committer | Avi Kivity | 2011-01-12 10:31:07 +0100 |
| commit | dc25e89e07d5ef31c476117d2c76b34dbb22196c (patch) | |
| tree | 9fef452c4bd0704b9d74512a9a58dc5d5b742d53 /arch/x86/kvm/x86.c | |
| parent | KVM: SVM: implement enhanced INVLPG intercept (diff) | |
| download | kernel-qcow2-linux-dc25e89e07d5ef31c476117d2c76b34dbb22196c.tar.gz kernel-qcow2-linux-dc25e89e07d5ef31c476117d2c76b34dbb22196c.tar.xz kernel-qcow2-linux-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/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index a6fcb76196b7..7ad9cda8ff36 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4365,7 +4365,9 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, - int emulation_type) + int emulation_type, + void *insn, + int insn_len) { int r; struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; @@ -4386,7 +4388,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, vcpu->arch.emulate_ctxt.have_exception = false; vcpu->arch.emulate_ctxt.perm_ok = false; - r = x86_decode_insn(&vcpu->arch.emulate_ctxt); + r = x86_decode_insn(&vcpu->arch.emulate_ctxt, insn, insn_len); if (r == X86EMUL_PROPAGATE_FAULT) goto done; |