Commit ab56f8e6 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini
Browse files

kvm: svm: Introduce GA Log tracepoint for AVIC 



GA Log tracepoint is useful when debugging AVIC performance
issue as it can be used with perf to count the number of times
IOMMU AVIC injects interrupts through the slow-path instead of
directly inject interrupts to the target vcpu.

Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3ac40c40

arch/x86/kvm/svm.c

+1 −0
Original line number Diff line number Diff line
@@ -1232,6 +1232,7 @@ static int avic_ga_log_notifier(u32 ga_tag) 
	u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag);



	pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id);

	trace_kvm_avic_ga_log(vm_id, vcpu_id);



	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);

	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {

arch/x86/kvm/trace.h

+18 −0
Original line number Diff line number Diff line
@@ -1367,6 +1367,24 @@ TRACE_EVENT(kvm_avic_unaccelerated_access, 
		  __entry->vec)

);



TRACE_EVENT(kvm_avic_ga_log,

	    TP_PROTO(u32 vmid, u32 vcpuid),

	    TP_ARGS(vmid, vcpuid),



	TP_STRUCT__entry(

		__field(u32, vmid)

		__field(u32, vcpuid)

	),



	TP_fast_assign(

		__entry->vmid = vmid;

		__entry->vcpuid = vcpuid;

	),



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

		  __entry->vmid, __entry->vcpuid)

);



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
@@ -10562,4 +10562,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full); 
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update);

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_apicv_update_request);

CRA Git | Maintained and supported by SUSTech CRA and CCSE