[regression] KVM: hangs and "irq timeout" booting HURD unless -no-kvm-irqchip passed

Commit Message

Gleb Natapov Feb. 7, 2011, 1:27 p.m. UTC

None

Patch

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 3cece05..62b1dde 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -549,6 +549,9 @@  static void pic_irq_request(struct kvm *kvm, int level)
 	struct kvm_pic *s = pic_irqchip(kvm);
 	int irq = pic_get_irq(&s->pics[0]);
 
+	if (s->output && !level)
+		s->pics[0].isr_ack = 0xff;
+
 	s->output = level;
 	if (vcpu && level && (s->pics[0].isr_ack & (1 << irq))) {
 		s->pics[0].isr_ack &= ~(1 << irq);