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KVM: x86: add a tracepoint for APICv/AVIC interrupt delivery 

This allows to see how many interrupts were delivered via the
APICv/AVIC from the host.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211209115440.394441-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Maxim Levitsky 2021-12-09 13:54:36 +02:00 committed by Paolo Bonzini
parent 502d2bf5f2
commit 8e819d75cb
3 changed files with 28 additions and 0 deletions
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3
arch/x86/kvm/lapic.c
View File

@ -1100,6 +1100,9 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
kvm_lapic_set_irr(vector, apic);
kvm_make_request(KVM_REQ_EVENT, vcpu);
kvm_vcpu_kick(vcpu);
} else {
trace_kvm_apicv_accept_irq(vcpu->vcpu_id, delivery_mode,
trig_mode, vector);
}
break;

24
arch/x86/kvm/trace.h
View File

@ -1356,6 +1356,30 @@ TRACE_EVENT(kvm_apicv_update_request,
__entry->bit)
);
TRACE_EVENT(kvm_apicv_accept_irq,
TP_PROTO(__u32 apicid, __u16 dm, __u16 tm, __u8 vec),
TP_ARGS(apicid, dm, tm, vec),
TP_STRUCT__entry(
__field( __u32, apicid )
__field( __u16, dm )
__field( __u16, tm )
__field( __u8, vec )
),
TP_fast_assign(
__entry->apicid = apicid;
__entry->dm = dm;
__entry->tm = tm;
__entry->vec = vec;
),
TP_printk("apicid %x vec %u (%s|%s)",
__entry->apicid, __entry->vec,
__print_symbolic((__entry->dm >> 8 & 0x7), kvm_deliver_mode),
__entry->tm ? "level" : "edge")
);
/*
* Tracepoint for AMD AVIC
*/

1
arch/x86/kvm/x86.c
View File

@ -12693,6 +12693,7 @@ 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_apicv_update_request);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_accept_irq);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_msr_protocol_enter);