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vhost-net: control virtqueue support

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We assume there's no cvq in the past, this is not true when we need
control virtqueue support for vhost-user backends. So this patch
implements the control virtqueue support for vhost-net. As datapath,
the control virtqueue is also required to be coupled with the
NetClientState. The vhost_net_start/stop() are tweaked to accept the
number of datapath queue pairs plus the the number of control
virtqueue for us to start and stop the vhost device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20211020045600.16082-7-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2021-10-20 12:55:56 +08:00 • committed by Michael S. Tsirkin
parent 2f849dbdb2
commit 05ba3f63d1
4 changed files with 40 additions and 17 deletions
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4
hw/net/virtio-net.c
View file

@ -285,14 +285,14 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
}
n->vhost_started = 1;
r = vhost_net_start(vdev, n->nic->ncs, queues);
r = vhost_net_start(vdev, n->nic->ncs, queues, 0);
if (r < 0) {
error_report("unable to start vhost net: %d: "
"falling back on userspace virtio", -r);
n->vhost_started = 0;
}
} else {
vhost_net_stop(vdev, n->nic->ncs, queues);
vhost_net_stop(vdev, n->nic->ncs, queues, 0);
n->vhost_started = 0;
}
}