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virtio: add vhost support for virtio devices

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This patch adds a get_vhost() callback function for VirtIODevices that
returns the device's corresponding vhost_dev structure, if the vhost
device is running. This patch also adds a vhost_started flag for
VirtIODevices.

Previously, a VirtIODevice wouldn't be able to tell if its corresponding
vhost device was active or not.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1648819405-25696-3-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jonah Palmer 2022-04-01 09:23:19 -04:00 • committed by Michael S. Tsirkin
parent 3857cd5c7f
commit c255488d67
12 changed files with 76 additions and 1 deletions
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9
hw/net/virtio-net.c
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@ -3620,6 +3620,14 @@ static bool dev_unplug_pending(void *opaque)
return vdc->primary_unplug_pending(dev);
}
static struct vhost_dev *virtio_net_get_vhost(VirtIODevice *vdev)
{
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_queue(n->nic);
struct vhost_net *net = get_vhost_net(nc->peer);
return &net->dev;
}
static const VMStateDescription vmstate_virtio_net = {
.name = "virtio-net",
.minimum_version_id = VIRTIO_NET_VM_VERSION,
@ -3722,6 +3730,7 @@ static void virtio_net_class_init(ObjectClass *klass, void *data)
vdc->post_load = virtio_net_post_load_virtio;
vdc->vmsd = &vmstate_virtio_net_device;
vdc->primary_unplug_pending = primary_unplug_pending;
vdc->get_vhost = virtio_net_get_vhost;
}
static const TypeInfo virtio_net_info = {