Commit b382f44e authored by Wanpeng Li's avatar Wanpeng Li Committed by Paolo Bonzini
Browse files

KVM: X86: Add pv tlb shootdown tracepoint 



Add pv tlb shootdown tracepoint.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 92735b1b

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

arch/x86/kvm/x86.c

+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);