linux-kernel - Re: [RFC 6/7] vdpa_sim :Add support for iommufd

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Message-ID: <20230925134646.GC13733@nvidia.com>
Date:   Mon, 25 Sep 2023 10:46:46 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Cindy Lu <lulu@...hat.com>
Cc:     jasowang@...hat.com, mst@...hat.com, yi.l.liu@...el.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [RFC 6/7] vdpa_sim :Add support for iommufd

On Sun, Sep 24, 2023 at 01:05:39AM +0800, Cindy Lu wrote:
> Add new vdpa_config_ops to support iommufd
> 
> Signed-off-by: Cindy Lu <lulu@...hat.com>
> ---
>  drivers/vdpa/vdpa_sim/vdpa_sim.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index cb88891b44a8..55e6f45bb274 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -727,6 +727,10 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
>  	.dma_map                = vdpasim_dma_map,
>  	.dma_unmap              = vdpasim_dma_unmap,
>  	.free                   = vdpasim_free,
> +	.bind_iommufd			= vdpa_iommufd_emulated_bind,
> +	.unbind_iommufd			= vdpa_iommufd_emulated_unbind,
> +	.attach_ioas			= vdpa_iommufd_emulated_attach_ioas,
> +	.detach_ioas			= vdpa_iommufd_emulated_detach_ioas,
>  };

Er, this series never calls iommufd_access_pin_pages() or
iommufd_access_rw(), so something pretty big is missing

Jason