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virtio: add AioContext-specific function for host notifiers

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This is used to register ioeventfd with a dataplane thread.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-02-14 18:17:06 +01:00 committed by Michael S. Tsirkin
parent 8b1fe1cedf
commit a1afb6062e
2 changed files with 18 additions and 0 deletions
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16
hw/virtio/virtio.c
View file

@ -1786,6 +1786,22 @@ static void virtio_queue_host_notifier_read(EventNotifier *n)
}
}
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
bool assign, bool set_handler)
{
if (assign && set_handler) {
aio_set_event_notifier(ctx, &vq->host_notifier, true,
virtio_queue_host_notifier_read);
} else {
aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL);
}
if (!assign) {
/* Test and clear notifier before after disabling event,
* in case poll callback didn't have time to run. */
virtio_queue_host_notifier_read(&vq->host_notifier);
}
}
void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
bool set_handler)
{

2
include/hw/virtio/virtio.h
View file

@ -249,6 +249,8 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
bool set_handler);
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
bool assign, bool set_handler);
void virtio_queue_notify_vq(VirtQueue *vq);
void virtio_irq(VirtQueue *vq);
VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);