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KVM: Add instruction emulation statistics
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f096ed8588
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2 changed files with 6 additions and 0 deletions
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@ -249,6 +249,8 @@ struct kvm_stat {
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u32 host_state_reload;
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u32 efer_reload;
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u32 fpu_reload;
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u32 insn_emulation;
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u32 insn_emulation_fail;
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};
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struct kvm_io_device {
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@ -63,6 +63,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "host_state_reload", STAT_OFFSET(host_state_reload) },
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{ "efer_reload", STAT_OFFSET(efer_reload) },
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{ "fpu_reload", STAT_OFFSET(fpu_reload) },
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{ "insn_emulation", STAT_OFFSET(insn_emulation) },
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{ "insn_emulation_fail", STAT_OFFSET(insn_emulation_fail) },
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{ NULL }
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};
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@ -1381,7 +1383,9 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
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get_segment_base(vcpu, VCPU_SREG_FS);
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r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
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++vcpu->stat.insn_emulation;
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if (r) {
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++vcpu->stat.insn_emulation_fail;
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if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
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return EMULATE_DONE;
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return EMULATE_FAIL;
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