[PATCH v2 3/5] KVM: x86: add request_exits debug counter

From: "Radim Krčmář" <rkrcmar@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>
Subject: [PATCH v2 3/5] KVM: x86: add request_exits debug counter
Date: Wed,  5 Aug 2015 18:32:59 +0200	[thread overview]
Message-ID: <1438792381-19453-4-git-send-email-rkrcmar@redhat.com> (raw)
In-Reply-To: <1438792381-19453-1-git-send-email-rkrcmar@redhat.com>

We are still interested in the amount of exits userspace requested and
signal_exits doesn't cover that anymore.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
 v2: move request_exits debug counter patch right after introduction of
     KVM_REQ_EXIT [3/5]
 arch/x86/include/asm/kvm_host.h | 1 +
 arch/x86/kvm/x86.c              | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 6e851d518b24..c875f70df02a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -717,6 +717,7 @@ struct kvm_vcpu_stat {
 	u32 hypercalls;
 	u32 irq_injections;
 	u32 nmi_injections;
+	u32 request_exits;
 };
 
 struct x86_instruction_info;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c5d790fdfc2e..3493457ad0a1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -145,6 +145,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ "io_exits", VCPU_STAT(io_exits) },
 	{ "mmio_exits", VCPU_STAT(mmio_exits) },
 	{ "signal_exits", VCPU_STAT(signal_exits) },
+	{ "request_exits", VCPU_STAT(request_exits) },
 	{ "irq_window", VCPU_STAT(irq_window_exits) },
 	{ "nmi_window", VCPU_STAT(nmi_window_exits) },
 	{ "halt_exits", VCPU_STAT(halt_exits) },
@@ -6550,6 +6551,7 @@ static int vcpu_run(struct kvm_vcpu *vcpu)
 		if (unlikely(kvm_has_request(KVM_REQ_EXIT, vcpu))) {
 			r = 0;
 			vcpu->run->exit_reason = KVM_EXIT_REQUEST;
+			++vcpu->stat.request_exits;
 			break;
 		}
 		if (need_resched()) {
-- 
2.5.0

