Re: [PATCH vhost v11 05/10] virtio_ring: introduce virtqueue_dma_dev()

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On Tue, 25 Jul 2023 03:34:34 -0400, "Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote:
> On Tue, Jul 25, 2023 at 10:13:48AM +0800, Xuan Zhuo wrote:
> > On Mon, 24 Jul 2023 09:43:42 -0700, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> > > On Thu, Jul 20, 2023 at 01:21:07PM -0400, Michael S. Tsirkin wrote:
> > > > Well I think we can add wrappers like virtio_dma_sync and so on.
> > > > There are NOP for non-dma so passing the dma device is harmless.
> > >
> > > Yes, please.
> >
> >
> > I am not sure I got this fully.
> >
> > Are you mean this:
> > https://lore.kernel.org/all/20230214072704.126660-8-xuanzhuo@xxxxxxxxxxxxxxxxx/
> > https://lore.kernel.org/all/20230214072704.126660-9-xuanzhuo@xxxxxxxxxxxxxxxxx/
> >
> > Then the driver must do dma operation(map and sync) by these virtio_dma_* APIs.
> > No care the device is non-dma device or dma device.
>
> yes
>
> > Then the AF_XDP must use these virtio_dma_* APIs for virtio device.
>
> We'll worry about AF_XDP when the patch is posted.

YES.

We discussed it. They voted 'no'.

http://lore.kernel.org/all/20230424082856.15c1e593@xxxxxxxxxx

Thanks.


>
> --
> MST
>




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