repository: /home/avi/kvm/linux-2.6
branch: master
commit d600e85f82c9da9641dfd593c70706dc398a6a35
Author: Avi Kivity <[EMAIL PROTECTED]>
Date: Sun Nov 18 15:17:51 2007 +0200
KVM: Add instruction emulation statistics
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index a85c590..5a8a9af 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -249,6 +249,8 @@ struct kvm_stat {
u32 host_state_reload;
u32 efer_reload;
u32 fpu_reload;
+ u32 insn_emulation;
+ u32 insn_emulation_fail;
};
struct kvm_io_device {
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 754afe9..d811b6c 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -63,6 +63,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "host_state_reload", STAT_OFFSET(host_state_reload) },
{ "efer_reload", STAT_OFFSET(efer_reload) },
{ "fpu_reload", STAT_OFFSET(fpu_reload) },
+ { "insn_emulation", STAT_OFFSET(insn_emulation) },
+ { "insn_emulation_fail", STAT_OFFSET(insn_emulation_fail) },
{ NULL }
};
@@ -1381,7 +1383,9 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
get_segment_base(vcpu, VCPU_SREG_FS);
r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
+ ++vcpu->stat.insn_emulation;
if (r) {
+ ++vcpu->stat.insn_emulation_fail;
if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
return EMULATE_DONE;
return EMULATE_FAIL;
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