KVM: fix ack not being delivered when msi present
kvm_notify_acked_irq does not check irq type, so that it sometimes
interprets msi vector as irq. As a result, ack notifiers are not
called, which typially hangs the guest. The fix is to track and
check irq type.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index a8bd466..ddc17f0 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -160,7 +160,8 @@
unsigned gsi = pin;
list_for_each_entry(e, &kvm->irq_routing, link)
- if (e->irqchip.irqchip == irqchip &&
+ if (e->type == KVM_IRQ_ROUTING_IRQCHIP &&
+ e->irqchip.irqchip == irqchip &&
e->irqchip.pin == pin) {
gsi = e->gsi;
break;
@@ -259,6 +260,7 @@
int delta;
e->gsi = ue->gsi;
+ e->type = ue->type;
switch (ue->type) {
case KVM_IRQ_ROUTING_IRQCHIP:
delta = 0;