From: Avi Kivity <avi@qumranet.com>
Date: Sun, 18 Nov 2007 13:17:51 +0000 (+0200)
Subject: KVM: Add instruction emulation statistics
X-Git-Tag: v2.6.25-rc1~1138^2~138
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=f2b5756bb3fbdca912c4890e444c18650389d8ae;p=linux-2.6-omap-h63xx.git

KVM: Add instruction emulation statistics
---

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index a85c5903591..5a8a9af3593 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 c1211e125b4..a46b95b3651 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;