virtio: move common irqfd handling out of virtio-pci

All transports can use the same event handler for the irqfd, though the
exact mechanics of the assignment will be specific.  Note that there
are three states: handled by the kernel, handled in userspace, disabled.

This also lets virtio use event_notifier_set_handler.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/kvm-stub.c b/kvm-stub.c
index ec9a36454d..d23b11c020 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -147,7 +147,17 @@ int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq)
     return -ENOSYS;
 }
 
+int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq)
+{
+    return -ENOSYS;
+}
+
 int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq)
 {
     return -ENOSYS;
 }
+
+int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq)
+{
+    return -ENOSYS;
+}