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| author | Avi Kivity | 2010-04-11 12:05:16 +0200 |
|---|---|---|
| committer | Avi Kivity | 2010-05-17 11:17:35 +0200 |
| commit | e46479f852adab6027e4950d69400d967bf7bc6f (patch) | |
| tree | 8111480e9ae6c85ef292325d6345923f0878f0c8 /arch/x86/kvm/x86.c | |
| parent | KVM: x86 emulator: Don't overwrite decode cache (diff) | |
| download | kernel-qcow2-linux-e46479f852adab6027e4950d69400d967bf7bc6f.tar.gz kernel-qcow2-linux-e46479f852adab6027e4950d69400d967bf7bc6f.tar.xz kernel-qcow2-linux-e46479f852adab6027e4950d69400d967bf7bc6f.zip | |
KVM: Trace emulated instructions
Log emulated instructions in ftrace, especially if they failed.
Signed-off-by: Avi Kivity <avi@redhat.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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 247e805a041e..33a40c544c7a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3718,6 +3718,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu, ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); + trace_kvm_emulate_insn_start(vcpu); /* Only allow emulation of specific instructions on #UD * (namely VMMCALL, sysenter, sysexit, syscall)*/ @@ -3750,6 +3751,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu, ++vcpu->stat.insn_emulation; if (r) { ++vcpu->stat.insn_emulation_fail; + trace_kvm_emulate_insn_failed(vcpu); if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) return EMULATE_DONE; return EMULATE_FAIL; @@ -3786,6 +3788,8 @@ restart: if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) goto done; if (!vcpu->mmio_needed) { + ++vcpu->stat.insn_emulation_fail; + trace_kvm_emulate_insn_failed(vcpu); kvm_report_emulation_failure(vcpu, "mmio"); return EMULATE_FAIL; } |