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Commit ac3e5fca authored by Andrey Smetanin's avatar Andrey Smetanin Committed by Paolo Bonzini
Browse files

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: default avatarAndrey 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: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 18659a9c

arch/x86/kvm/hyperv.c

+26 −1
Original line number Diff line number Diff line
@@ -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;

arch/x86/kvm/trace.h

+170 −0
Original line number Diff line number Diff line
@@ -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