linux-kernel - [PATCH 06/52] KVM: Add instruction emulation statistics

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1198998638-22713-7-git-send-email-avi@qumranet.com>
Date:	Sun, 30 Dec 2007 09:09:52 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	linux-kernel@...r.kernel.org, kvm-devel@...ts.sourceforge.net
Subject: [PATCH 06/52] KVM: Add instruction emulation statistics

---
 drivers/kvm/kvm.h |    2 ++
 drivers/kvm/x86.c |    4 ++++
 2 files changed, 6 insertions(+), 0 deletions(-)

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 c1211e1..a46b95b 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;
-- 
1.5.3.7

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/