netdev - Re: [RFC v1 7/8] vp_vdpa::Add support for iommufd

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Message-ID: <CACGkMEuEpQinKo4zMVJ_MohPH8PkG9vx0MrhX4B_9d4UKkoV-w@mail.gmail.com>
Date: Mon, 6 Nov 2023 15:25:32 +0800
From: Jason Wang <jasowang@...hat.com>
To: Cindy Lu <lulu@...hat.com>
Cc: mst@...hat.com, yi.l.liu@...el.com, jgg@...dia.com, 
	linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, 
	netdev@...r.kernel.org
Subject: Re: [RFC v1 7/8] vp_vdpa::Add support for iommufd

On Sat, Nov 4, 2023 at 1:17 AM Cindy Lu <lulu@...hat.com> wrote:
>
> Add new vdpa_config_ops function to support iommufd
>
> Signed-off-by: Cindy Lu <lulu@...hat.com>
> ---
>  drivers/vdpa/virtio_pci/vp_vdpa.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
> index 281287fae89f..dd2c372d36a6 100644
> --- a/drivers/vdpa/virtio_pci/vp_vdpa.c
> +++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
> @@ -460,6 +460,10 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
>         .set_config     = vp_vdpa_set_config,
>         .set_config_cb  = vp_vdpa_set_config_cb,
>         .get_vq_irq     = vp_vdpa_get_vq_irq,
> +       .bind_iommufd = vdpa_iommufd_physical_bind,
> +       .unbind_iommufd = vdpa_iommufd_physical_unbind,
> +       .attach_ioas = vdpa_iommufd_physical_attach_ioas,
> +       .detach_ioas = vdpa_iommufd_physical_detach_ioas,

For the device that depends on the platform IOMMU, any reason we still
bother a per device config ops here just as an indirection?

Thanks

>  };
>
>  static void vp_vdpa_free_irq_vectors(void *data)
> --
> 2.34.3
>