Re: [Qemu-devel] [PATCH RFC v6 17/20] virtio-net: enable virtio 1.0

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Dec 11, 2014 at 02:25:19PM +0100, Cornelia Huck wrote:
> virtio-net (non-vhost) now should have everything in place to support
> virtio 1.0: let's enable the feature bit for it.
> 
> Note that VIRTIO_F_VERSION_1 is technically a transport feature; once
> every device is ready for virtio 1.0, we can move setting this
> feature bit out of the individual devices.
> 
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

So to use this with e.g. tun, you need to make tun device LE.
I posted a kernel patch 1418732988-3535-1-git-send-email-mst@redhat.com
with TUNSETVNETLE/TUNGETVNETLE ioctls to support it.

But you still need to call them in qemu, and disable virtio-1.0
if not there.


> ---
>  hw/net/virtio-net.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
> index 7ee2bd6..b5dd356 100644
> --- a/hw/net/virtio-net.c
> +++ b/hw/net/virtio-net.c
> @@ -473,6 +473,7 @@ static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features)
>      }
>  
>      if (!get_vhost_net(nc->peer)) {
> +        virtio_add_feature(&features, VIRTIO_F_VERSION_1);
>          return features;
>      }
>      return vhost_net_get_features(get_vhost_net(nc->peer), features);
> -- 
> 1.7.9.5