kvm/x86: Hyper-V SynIC timers tracepoints
Trace the following Hyper SynIC timers events:
* periodic timer start
* one-shot timer start
* timer callback
* timer expiration and message delivery result
* timer config setup
* timer count setup
* timer cleanup
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 2d83d459..c58ba67 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -405,6 +405,9 @@
{
struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
+ trace_kvm_hv_stimer_cleanup(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index);
+
hrtimer_cancel(&stimer->timer);
clear_bit(stimer->index,
vcpu_to_hv_vcpu(vcpu)->stimer_pending_bitmap);
@@ -417,6 +420,8 @@
struct kvm_vcpu_hv_stimer *stimer;
stimer = container_of(timer, struct kvm_vcpu_hv_stimer, timer);
+ trace_kvm_hv_stimer_callback(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index);
stimer_mark_pending(stimer, true);
return HRTIMER_NORESTART;
@@ -448,6 +453,11 @@
} else
stimer->exp_time = time_now + stimer->count;
+ trace_kvm_hv_stimer_start_periodic(
+ stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index,
+ time_now, stimer->exp_time);
+
hrtimer_start(&stimer->timer,
ktime_add_ns(ktime_now,
100 * (stimer->exp_time - time_now)),
@@ -466,6 +476,10 @@
return 0;
}
+ trace_kvm_hv_stimer_start_one_shot(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index,
+ time_now, stimer->count);
+
hrtimer_start(&stimer->timer,
ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
HRTIMER_MODE_ABS);
@@ -475,6 +489,9 @@
static int stimer_set_config(struct kvm_vcpu_hv_stimer *stimer, u64 config,
bool host)
{
+ trace_kvm_hv_stimer_set_config(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, config, host);
+
stimer_cleanup(stimer);
if ((stimer->config & HV_STIMER_ENABLE) && HV_STIMER_SINT(config) == 0)
config &= ~HV_STIMER_ENABLE;
@@ -486,6 +503,9 @@
static int stimer_set_count(struct kvm_vcpu_hv_stimer *stimer, u64 count,
bool host)
{
+ trace_kvm_hv_stimer_set_count(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, count, host);
+
stimer_cleanup(stimer);
stimer->count = count;
if (stimer->count == 0)
@@ -564,8 +584,13 @@
static void stimer_expiration(struct kvm_vcpu_hv_stimer *stimer)
{
+ int r;
+
stimer->msg_pending = true;
- if (!stimer_send_msg(stimer)) {
+ r = stimer_send_msg(stimer);
+ trace_kvm_hv_stimer_expiration(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, r);
+ if (!r) {
stimer->msg_pending = false;
if (!(stimer->config & HV_STIMER_PERIODIC))
stimer->config &= ~HV_STIMER_ENABLE;