Patchwork KVM: PPC: Book3S: Enable IRQs during exit handling

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Submitter Alexander Graf
Date April 30, 2012, 9:13 a.m.
Message ID <1335777210-14290-1-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/155818/
State New
Headers show

Comments

Alexander Graf - April 30, 2012, 9:13 a.m.
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>
---
 arch/powerpc/kvm/book3s_pr.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index a172926..63850cf 100644
--- 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);