KVM: PPC: Book3S PR: Handle hyp doorbell exits

If we're running PR KVM in HV mode, we may get hypervisor doorbell interrupts.
Handle those the same way we treat normal doorbells.

Signed-off-by: Alexander Graf <agraf@suse.de>

arch/powerpc/kvm/book3s_pr.c

@@ -988,6 +988,7 @@ int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 	case BOOK3S_INTERRUPT_DECREMENTER:
 	case BOOK3S_INTERRUPT_HV_DECREMENTER:
 	case BOOK3S_INTERRUPT_DOORBELL:
+	case BOOK3S_INTERRUPT_H_DOORBELL:
 		vcpu->stat.dec_exits++;
 		r = RESUME_GUEST;
 		break;