Commit 39b6b8c3 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini
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KVM: SVM: Add AVIC doorbell tracepoint 



Add a tracepoint to track number of doorbells being sent
to signal a running vCPU to process IRQ after being injected.

Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20220519102709.24125-17-suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8c9e639d

arch/x86/kvm/svm/avic.c

+3 −1
Original line number Diff line number Diff line
@@ -324,8 +324,10 @@ void avic_ring_doorbell(struct kvm_vcpu *vcpu) 
	 */

	int cpu = READ_ONCE(vcpu->cpu);



	if (cpu != get_cpu())

	if (cpu != get_cpu()) {

		wrmsrl(MSR_AMD64_SVM_AVIC_DOORBELL, kvm_cpu_get_apicid(cpu));

		trace_kvm_avic_doorbell(vcpu->vcpu_id, kvm_cpu_get_apicid(cpu));

	}

	put_cpu();

}

arch/x86/kvm/trace.h

+18 −0
Original line number Diff line number Diff line
@@ -1490,6 +1490,24 @@ TRACE_EVENT(kvm_avic_kick_vcpu_slowpath, 
		  __entry->icrh, __entry->icrl, __entry->index)

);



TRACE_EVENT(kvm_avic_doorbell,

	    TP_PROTO(u32 vcpuid, u32 apicid),

	    TP_ARGS(vcpuid, apicid),



	TP_STRUCT__entry(

		__field(u32, vcpuid)

		__field(u32, apicid)

	),



	TP_fast_assign(

		__entry->vcpuid = vcpuid;

		__entry->apicid = apicid;

	),



	TP_printk("vcpuid=%u, apicid=%u",

		  __entry->vcpuid, __entry->apicid)

);



TRACE_EVENT(kvm_hv_timer_state,

		TP_PROTO(unsigned int vcpu_id, unsigned int hv_timer_in_use),

		TP_ARGS(vcpu_id, hv_timer_in_use),

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -13328,6 +13328,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); 
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_kick_vcpu_slowpath);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_doorbell);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_accept_irq);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit);