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vhost: backend masking support

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Support backend guest notifier masking in vhost-net:
create eventfd at device init, when masked,
make vhost use that as eventfd instead of
sending an interrupt.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2012-12-24 17:37:01 +02:00
parent 24f4fe345c
commit f56a12475f
5 changed files with 137 additions and 16 deletions
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18
hw/virtio-net.c
View file

@ -1010,6 +1010,22 @@ static NetClientInfo net_virtio_info = {
.link_status_changed = virtio_net_set_link_status,
};
static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VirtIONet *n = to_virtio_net(vdev);
assert(n->vhost_started);
return vhost_net_virtqueue_pending(tap_get_vhost_net(n->nic->nc.peer), idx);
}
static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
bool mask)
{
VirtIONet *n = to_virtio_net(vdev);
assert(n->vhost_started);
vhost_net_virtqueue_mask(tap_get_vhost_net(n->nic->nc.peer),
vdev, idx, mask);
}
VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf,
virtio_net_conf *net)
{
@ -1026,6 +1042,8 @@ VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf,
n->vdev.bad_features = virtio_net_bad_features;
n->vdev.reset = virtio_net_reset;
n->vdev.set_status = virtio_net_set_status;
n->vdev.guest_notifier_mask = virtio_net_guest_notifier_mask;
n->vdev.guest_notifier_pending = virtio_net_guest_notifier_pending;
n->rx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_rx);
if (net->tx && strcmp(net->tx, "timer") && strcmp(net->tx, "bh")) {