Commit 7fdaec99 authored by Alexander Graf's avatar Alexander Graf Committed by Avi Kivity
Browse files

KVM: PPC: Make Performance Counters work 



When we get a performance counter interrupt we need to route it on to the
Linux handler after we got out of the guest context. We also need to tell
our handling code that this particular interrupt doesn't need treatment.

So let's add those two bits in, making perf work while having a KVM guest
running.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent af7b4d10

arch/powerpc/kvm/book3s.c

+3 −0
Original line number Diff line number Diff line
@@ -873,6 +873,9 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 
		vcpu->stat.ext_intr_exits++;

		r = RESUME_GUEST;

		break;

	case BOOK3S_INTERRUPT_PERFMON:

		r = RESUME_GUEST;

		break;

	case BOOK3S_INTERRUPT_PROGRAM:

	{

		enum emulation_result er;

arch/powerpc/kvm/book3s_interrupts.S

+2 −0
Original line number Diff line number Diff line
@@ -228,6 +228,8 @@ no_dcbz32_off: 
	beq	call_linux_handler

	cmpwi	r12, BOOK3S_INTERRUPT_DECREMENTER

	beq	call_linux_handler

	cmpwi	r12, BOOK3S_INTERRUPT_PERFMON

	beq	call_linux_handler



	/* Back to EE=1 */

	mtmsr	r6