Re: [PATCH vhost v6 08/11] virtio_ring: introduce virtqueue_dma_dev()

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On Tue, Apr 11, 2023 at 02:28:00PM +0800, Xuan Zhuo wrote:
> > That is just completely broken, virtio or not.  Highlevel code like
> > sockets must never do dma mappings themselves.
> AF_XDP provides some API for net driver. This API will do dma map or dma sync.
> cc AF_XDP maintainers.

So in that case AF_XDP doesn't actually require a dma device as you
claimed early and gets the layering right after all.  Just don't use that
API from a network driver that doesn't need to do dma mappings like
virtio for the !platform_access case then.
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