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: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/kvm/book3s.c | 3 +++
arch/powerpc/kvm/book3s_interrupts.S | 2 ++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index a7de709..a03163b 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -872,6 +872,9 @@ 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;
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S
index f5b3358..e486193 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -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
--
1.6.0.2
--
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