Add trace events to track suspensions and unsuspensions vCPUs, because of Hyper-V mechanisms.
Signed-off-by: Nikolas Wipper <[email protected]> --- arch/x86/kvm/hyperv.c | 4 ++++ arch/x86/kvm/trace.h | 39 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 40ea8340838f..55b8f88a91cb 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2944,6 +2944,8 @@ void kvm_hv_vcpu_suspend_tlb_flush(struct kvm_vcpu *vcpu, int vcpu_id) /* waiting_on's store should happen before suspended's */ WRITE_ONCE(vcpu->arch.hyperv->waiting_on, vcpu_id); WRITE_ONCE(vcpu->arch.hyperv->suspended, true); + + trace_kvm_hv_vcpu_suspend_tlb_flush(vcpu->vcpu_id, vcpu_id); } void kvm_hv_vcpu_unsuspend_tlb_flush(struct kvm_vcpu *vcpu) @@ -2962,6 +2964,8 @@ void kvm_hv_vcpu_unsuspend_tlb_flush(struct kvm_vcpu *vcpu) WRITE_ONCE(v->arch.hyperv->waiting_on, -1); WRITE_ONCE(v->arch.hyperv->suspended, false); __set_bit(i, vcpu_mask); + + trace_kvm_hv_vcpu_unsuspend_tlb_flush(v->vcpu_id); } } diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index d3aeffd6ae75..5564ef52fd9d 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -1871,6 +1871,45 @@ TRACE_EVENT(kvm_rmp_fault, __entry->error_code, __entry->rmp_level, __entry->psmash_ret) ); +/* + * Tracepoint for Hyper-V TlbFlushInhibit suspension + */ +TRACE_EVENT(kvm_hv_vcpu_suspend_tlb_flush, + TP_PROTO(int vcpu_id, int waiting_on), + TP_ARGS(vcpu_id, waiting_on), + + TP_STRUCT__entry( + __field(int, vcpu_id) + __field(int, waiting_on) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu_id; + __entry->waiting_on = waiting_on; + ), + + TP_printk("suspending vcpu %u waiting on %u", + __entry->vcpu_id, __entry->waiting_on) +); + +/* + * Tracepoint for Hyper-V TlbFlushInhibit unsuspension + */ +TRACE_EVENT(kvm_hv_vcpu_unsuspend_tlb_flush, + TP_PROTO(int vcpu_id), + TP_ARGS(vcpu_id), + TP_STRUCT__entry( + __field(int, vcpu_id) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu_id; + ), + + TP_printk("unsuspending vcpu %u", + __entry->vcpu_id) +); + #endif /* _TRACE_KVM_H */ #undef TRACE_INCLUDE_PATH -- 2.40.1 Amazon Web Services Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 257764 B Sitz: Berlin Ust-ID: DE 365 538 597
