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authorAndrey Smetanin <asmetanin@virtuozzo.com>2015-12-23 16:54:00 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2016-01-08 21:04:43 +0300
commitac3e5fcae8ca658e7dcc3fdcd50af7e4779f58c1 (patch)
tree37a76f87d2f8deacc228a4928dfb8d185e7edfc8 /arch
parent18659a9cb1885d00dd428f8857f7f628e54a45ee (diff)
downloadlinux-ac3e5fcae8ca658e7dcc3fdcd50af7e4779f58c1.tar.xz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/hyperv.c27
-rw-r--r--arch/x86/kvm/trace.h170
2 files changed, 196 insertions, 1 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 2d83d4598507..c58ba67175ac 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -405,6 +405,9 @@ static void stimer_cleanup(struct kvm_vcpu_hv_stimer *stimer)
{
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 @@ static enum hrtimer_restart stimer_timer_callback(struct hrtimer *timer)
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 @@ static int stimer_start(struct kvm_vcpu_hv_stimer *stimer)
} 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 @@ static int stimer_start(struct kvm_vcpu_hv_stimer *stimer)
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_start(struct kvm_vcpu_hv_stimer *stimer)
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_config(struct kvm_vcpu_hv_stimer *stimer, u64 config,
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 int stimer_send_msg(struct kvm_vcpu_hv_stimer *stimer)
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;
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 4be350003bce..ad9f6a23f139 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1118,6 +1118,176 @@ TRACE_EVENT(kvm_hv_synic_set_msr,
__entry->vcpu_id, __entry->msr, __entry->data, __entry->host)
);
+/*
+ * Tracepoint for stimer_set_config.
+ */
+TRACE_EVENT(kvm_hv_stimer_set_config,
+ TP_PROTO(int vcpu_id, int timer_index, u64 config, bool host),
+ TP_ARGS(vcpu_id, timer_index, config, host),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ __field(u64, config)
+ __field(bool, host)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ __entry->config = config;
+ __entry->host = host;
+ ),
+
+ TP_printk("vcpu_id %d timer %d config 0x%llx host %d",
+ __entry->vcpu_id, __entry->timer_index, __entry->config,
+ __entry->host)
+);
+
+/*
+ * Tracepoint for stimer_set_count.
+ */
+TRACE_EVENT(kvm_hv_stimer_set_count,
+ TP_PROTO(int vcpu_id, int timer_index, u64 count, bool host),
+ TP_ARGS(vcpu_id, timer_index, count, host),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ __field(u64, count)
+ __field(bool, host)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ __entry->count = count;
+ __entry->host = host;
+ ),
+
+ TP_printk("vcpu_id %d timer %d count %llu host %d",
+ __entry->vcpu_id, __entry->timer_index, __entry->count,
+ __entry->host)
+);
+
+/*
+ * Tracepoint for stimer_start(periodic timer case).
+ */
+TRACE_EVENT(kvm_hv_stimer_start_periodic,
+ TP_PROTO(int vcpu_id, int timer_index, u64 time_now, u64 exp_time),
+ TP_ARGS(vcpu_id, timer_index, time_now, exp_time),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ __field(u64, time_now)
+ __field(u64, exp_time)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ __entry->time_now = time_now;
+ __entry->exp_time = exp_time;
+ ),
+
+ TP_printk("vcpu_id %d timer %d time_now %llu exp_time %llu",
+ __entry->vcpu_id, __entry->timer_index, __entry->time_now,
+ __entry->exp_time)
+);
+
+/*
+ * Tracepoint for stimer_start(one-shot timer case).
+ */
+TRACE_EVENT(kvm_hv_stimer_start_one_shot,
+ TP_PROTO(int vcpu_id, int timer_index, u64 time_now, u64 count),
+ TP_ARGS(vcpu_id, timer_index, time_now, count),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ __field(u64, time_now)
+ __field(u64, count)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ __entry->time_now = time_now;
+ __entry->count = count;
+ ),
+
+ TP_printk("vcpu_id %d timer %d time_now %llu count %llu",
+ __entry->vcpu_id, __entry->timer_index, __entry->time_now,
+ __entry->count)
+);
+
+/*
+ * Tracepoint for stimer_timer_callback.
+ */
+TRACE_EVENT(kvm_hv_stimer_callback,
+ TP_PROTO(int vcpu_id, int timer_index),
+ TP_ARGS(vcpu_id, timer_index),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ ),
+
+ TP_printk("vcpu_id %d timer %d",
+ __entry->vcpu_id, __entry->timer_index)
+);
+
+/*
+ * Tracepoint for stimer_expiration.
+ */
+TRACE_EVENT(kvm_hv_stimer_expiration,
+ TP_PROTO(int vcpu_id, int timer_index, int msg_send_result),
+ TP_ARGS(vcpu_id, timer_index, msg_send_result),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ __field(int, msg_send_result)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ __entry->msg_send_result = msg_send_result;
+ ),
+
+ TP_printk("vcpu_id %d timer %d msg send result %d",
+ __entry->vcpu_id, __entry->timer_index,
+ __entry->msg_send_result)
+);
+
+/*
+ * Tracepoint for stimer_cleanup.
+ */
+TRACE_EVENT(kvm_hv_stimer_cleanup,
+ TP_PROTO(int vcpu_id, int timer_index),
+ TP_ARGS(vcpu_id, timer_index),
+
+ TP_STRUCT__entry(
+ __field(int, vcpu_id)
+ __field(int, timer_index)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->timer_index = timer_index;
+ ),
+
+ TP_printk("vcpu_id %d timer %d",
+ __entry->vcpu_id, __entry->timer_index)
+);
+
#endif /* _TRACE_KVM_H */
#undef TRACE_INCLUDE_PATH