linux-kernel - Re: [PATCH v1 2/2] vduse: enable Virtio-net device type

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Date:   Wed, 28 Jun 2023 10:34:55 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Maxime Coquelin <maxime.coquelin@...hat.com>
Cc:     xieyongji@...edance.com, mst@...hat.com, david.marchand@...hat.com,
        lulu@...hat.com, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        xuanzhuo@...ux.alibaba.com, eperezma@...hat.com
Subject: Re: [PATCH v1 2/2] vduse: enable Virtio-net device type

On Tue, Jun 27, 2023 at 7:37 PM Maxime Coquelin
<maxime.coquelin@...hat.com> wrote:
>
> This patch adds Virtio-net device type to the supported
> devices types. Initialization fails if the device does
> not support VIRTIO_F_VERSION_1 feature, in order to
> guarantee the configuration space is read-only.
>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@...hat.com>

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks

> ---
>  drivers/vdpa/vdpa_user/vduse_dev.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
> index c1c2f4c711ae..89088fa27026 100644
> --- a/drivers/vdpa/vdpa_user/vduse_dev.c
> +++ b/drivers/vdpa/vdpa_user/vduse_dev.c
> @@ -142,6 +142,7 @@ static struct workqueue_struct *vduse_irq_bound_wq;
>
>  static u32 allowed_device_id[] = {
>         VIRTIO_ID_BLOCK,
> +       VIRTIO_ID_NET,
>  };
>
>  static inline struct vduse_dev *vdpa_to_vduse(struct vdpa_device *vdpa)
> @@ -1668,6 +1669,10 @@ static bool features_is_valid(struct vduse_dev_config *config)
>                         (config->features & (1ULL << VIRTIO_BLK_F_CONFIG_WCE)))
>                 return false;
>
> +       if ((config->device_id == VIRTIO_ID_NET) &&
> +                       !(config->features & (1ULL << VIRTIO_F_VERSION_1)))
> +               return false;
> +
>         return true;
>  }
>
> @@ -2023,6 +2028,7 @@ static const struct vdpa_mgmtdev_ops vdpa_dev_mgmtdev_ops = {
>
>  static struct virtio_device_id id_table[] = {
>         { VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
> +       { VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },
>         { 0 },
>  };
>
> --
> 2.41.0
>