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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
Download patch file Download diff file Expand all files Collapse all files

27
hw/vhost_net.c
View file

@ -109,6 +109,9 @@ struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
(1 << VHOST_NET_F_VIRTIO_NET_HDR);
net->backend = r;
net->dev.nvqs = 2;
net->dev.vqs = net->vqs;
r = vhost_dev_init(&net->dev, devfd, "/dev/vhost-net", force);
if (r < 0) {
goto fail;
@ -143,9 +146,6 @@ int vhost_net_start(struct vhost_net *net,
struct vhost_vring_file file = { };
int r;
net->dev.nvqs = 2;
net->dev.vqs = net->vqs;
r = vhost_dev_enable_notifiers(&net->dev, dev);
if (r < 0) {
goto fail_notifiers;
@ -200,6 +200,17 @@ void vhost_net_cleanup(struct vhost_net *net)
vhost_dev_cleanup(&net->dev);
g_free(net);
}
bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
{
return vhost_virtqueue_pending(&net->dev, idx);
}
void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
int idx, bool mask)
{
vhost_virtqueue_mask(&net->dev, dev, idx, mask);
}
#else
struct vhost_net *vhost_net_init(NetClientState *backend, int devfd,
bool force)
@ -234,4 +245,14 @@ unsigned vhost_net_get_features(struct vhost_net *net, unsigned features)
void vhost_net_ack_features(struct vhost_net *net, unsigned features)
{
}
bool vhost_net_virtqueue_pending(VHostNetState *net, int idx)
{
return -ENOSYS;
}
void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
int idx, bool mask)
{
}
#endif