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

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On Mon, 10 Apr 2023 23:30:29 -0700, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> > > Can you please explain what you're even trying to do?
> >
> > I want to force a device use direct dma map.
>
> You fundamentally can't do that.  It can't work.

Do you mean my idea is wrong, right?

Can you explain it? Why can't we support a device that uses only dirct map?

Thanks.



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