Re: [Linaro-mm-sig] [PATCH 4/8] dma-buf: add peer2peer flag

Christoph Hellwig
2018-04-25T06:43:38Z

On Wed, Apr 25, 2018 at 08:23:15AM +0200, Daniel Vetter wrote:
> For more fun:
>
> https://www.spinics.net/lists/dri-devel/msg173630.html
>
> Yeah, sometimes we want to disable the iommu because the on-gpu
> pagetables are faster ...

I am not on this list, but remote NAK from here. This needs an
API from the iommu/dma-mapping code. Drivers have no business poking
into these details.

Thierry, please resend this with at least the iommu list and
linux-arm-kernel in Cc to have a proper discussion on the right API.