diff options
Diffstat (limited to 'hw/virtio.c')
-rw-r--r-- | hw/virtio.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index 197edf00f4..d146f86f13 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -984,6 +984,30 @@ VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n) return vdev->vq + n; } +static void virtio_queue_guest_notifier_read(EventNotifier *n) +{ + VirtQueue *vq = container_of(n, VirtQueue, guest_notifier); + if (event_notifier_test_and_clear(n)) { + virtio_irq(vq); + } +} + +void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, + bool with_irqfd) +{ + if (assign && !with_irqfd) { + event_notifier_set_handler(&vq->guest_notifier, + virtio_queue_guest_notifier_read); + } else { + event_notifier_set_handler(&vq->guest_notifier, NULL); + } + if (!assign) { + /* Test and clear notifier before closing it, + * in case poll callback didn't have time to run. */ + virtio_queue_guest_notifier_read(&vq->guest_notifier); + } +} + EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq) { return &vq->guest_notifier; |