[dpdk-dev] [PATCH 08/40] net/virtio: force IOVA as VA mode for Virtio-user

[David Marchand]

On Sun, Dec 20, 2020 at 10:14 PM Maxime Coquelin
<maxime.coquelin at redhat.com> wrote:
> diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
> index 1f1f63a1a5..f4775ff141 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -663,6 +663,17 @@ virtio_user_pmd_probe(struct rte_vdev_device *vdev)
>         char *mac_addr = NULL;
>         int ret = -1;
>
> +       /*
> +        * ToDo 1: Implement detection mechanism at vdev bus level as PCI, but
> +        * it implies API breakage.

Extending rte_vdev_driver to implement this detection would be an ABI breakage.
This is a driver-only API (rte_vdev_driver is only used by the vdev
bus and drivers afaics).

Doing this is allowed as per my understanding of the ABI policy which
guarantees ABI stability for applications.
We do not guarantee this stability for OOT drivers.

-- 
David Marchand