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Commit 5bfd8b54 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: Move kvm_exit tracepoint rip reading inside tracepoint 



Reading rip is expensive on vmx, so move it inside the tracepoint so we only
incur the cost if tracing is enabled.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent d4f64b6c

arch/x86/kvm/svm.c

+1 −1
Original line number Diff line number Diff line
@@ -2686,7 +2686,7 @@ static int handle_exit(struct kvm_vcpu *vcpu) 
	struct kvm_run *kvm_run = vcpu->run;

	u32 exit_code = svm->vmcb->control.exit_code;



	trace_kvm_exit(exit_code, svm->vmcb->save.rip);

	trace_kvm_exit(exit_code, vcpu);



	if (unlikely(svm->nested.exit_required)) {

		nested_svm_vmexit(svm);

arch/x86/kvm/trace.h

+3 −3
Original line number Diff line number Diff line
@@ -182,8 +182,8 @@ TRACE_EVENT(kvm_apic, 
 * Tracepoint for kvm guest exit:

 */

TRACE_EVENT(kvm_exit,

	TP_PROTO(unsigned int exit_reason, unsigned long guest_rip),

	TP_ARGS(exit_reason, guest_rip),

	TP_PROTO(unsigned int exit_reason, struct kvm_vcpu *vcpu),

	TP_ARGS(exit_reason, vcpu),



	TP_STRUCT__entry(

		__field(	unsigned int,	exit_reason	)
@@ -192,7 +192,7 @@ TRACE_EVENT(kvm_exit, 


	TP_fast_assign(

		__entry->exit_reason	= exit_reason;

		__entry->guest_rip	= guest_rip;

		__entry->guest_rip	= kvm_rip_read(vcpu);

	),



	TP_printk("reason %s rip 0x%lx",

arch/x86/kvm/vmx.c

+1 −1
Original line number Diff line number Diff line
@@ -3612,7 +3612,7 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu) 
	u32 exit_reason = vmx->exit_reason;

	u32 vectoring_info = vmx->idt_vectoring_info;



	trace_kvm_exit(exit_reason, kvm_rip_read(vcpu));

	trace_kvm_exit(exit_reason, vcpu);



	/* If guest state is invalid, start emulating */

	if (vmx->emulation_required && emulate_invalid_guest_state)