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

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On Mon, 10 Apr 2023 20:26:20 -0700, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Tue, Apr 11, 2023 at 09:56:19AM +0800, Xuan Zhuo wrote:
> > Do you mean we should not change the dma_ops from the outside of the core
> > kernel/dma/?
> Basically, yes.  That plus probing for the IOMMU drivers.
> > How about adding one new "dma_direct" to struct devive?
> Why would we?
> Can you please explain what you're even trying to do?

I want to force a device use direct dma map.


> But checking
> a dma_direct flag for sure isn't the solution.
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