KVM: VMX: Conditionally request interrupt window after injecting irq
Avi Kivity [Sun, 23 Nov 2008 16:08:57 +0000 (18:08 +0200)]
If we're injecting an interrupt, and another one is pending, request
an interrupt window notification so we don't have excess latency on the
second interrupt.

This shouldn't happen in practice since an EOI will be issued, giving a second
chance to request an interrupt window, but...

Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/vmx.c

index f5958a7..7ea4855 100644 (file)
@@ -3304,6 +3304,8 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu)
        if (vcpu->arch.interrupt.pending) {
                vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
                kvm_timer_intr_post(vcpu, vcpu->arch.interrupt.nr);
+               if (kvm_cpu_has_interrupt(vcpu))
+                       enable_irq_window(vcpu);
        }
 }