Patchwork [11/16] KVM: PPC: Book3S: Enable IRQs during exit handling

login
register
mail settings
Submitter Alexander Graf
Date May 6, 2012, 2:20 p.m.
Message ID <1336314060-32640-12-git-send-email-agraf@suse.de>
Download mbox | patch
Permalink /patch/157066/
State New
Headers show

Comments

Alexander Graf - May 6, 2012, 2:20 p.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 dba282e..d169a0a 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);