KVM: X86: Add pv tlb shootdown tracepoint (b382f44e) · Commits · 戴 / test

arch/x86/kvm/trace.h

+19 −0

Original line number	Diff line number	Diff line
		@@ -1462,6 +1462,25 @@ TRACE_EVENT(kvm_hv_send_ipi_ex,
		__entry->vector, __entry->format,
		__entry->valid_bank_mask)
		);

		TRACE_EVENT(kvm_pv_tlb_flush,
		TP_PROTO(unsigned int vcpu_id, bool need_flush_tlb),
		TP_ARGS(vcpu_id, need_flush_tlb),

		TP_STRUCT__entry(
		__field( unsigned int, vcpu_id )
		__field( bool, need_flush_tlb )
		),

		TP_fast_assign(
		__entry->vcpu_id = vcpu_id;
		__entry->need_flush_tlb = need_flush_tlb;
		),

		TP_printk("vcpu %u need_flush_tlb %s", __entry->vcpu_id,
		__entry->need_flush_tlb ? "true" : "false")
		);

		#endif /* _TRACE_KVM_H */

		#undef TRACE_INCLUDE_PATH

+2 −0

Original line number	Diff line number	Diff line
		@@ -2459,6 +2459,8 @@ static void record_steal_time(struct kvm_vcpu *vcpu)
		* Doing a TLB flush here, on the guest's behalf, can avoid
		* expensive IPIs.
		*/
		trace_kvm_pv_tlb_flush(vcpu->vcpu_id,
		vcpu->arch.st.steal.preempted & KVM_VCPU_FLUSH_TLB);
		if (xchg(&vcpu->arch.st.steal.preempted, 0) & KVM_VCPU_FLUSH_TLB)
		kvm_vcpu_flush_tlb(vcpu, false);