KVM: PPC: Book3S: Enable IRQs during exit handling

While handling an exit, we should listen for interrupts and make sure to
receive them when they arrive, to keep our latencies low.

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

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index dba282e..d169a0a 100644 (file)
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -548,6 +548,9 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
        run->exit_reason = KVM_EXIT_UNKNOWN;
        run->ready_for_interrupt_injection = 1;
 
+       /* We get here with MSR.EE=0, so enable it to be a nice citizen */
+       __hard_irq_enable();
+
        trace_kvm_book3s_exit(exit_nr, vcpu);
        preempt_enable();
        kvm_resched(vcpu);