Re: IOMMU and graphics cards

David Woodhouse
2009-07-06T14:19:23Z

On Mon, 2009-07-06 at 15:11 +0200, Joerg Roedel wrote:
> Ok, cool, that sounds good. Which in-kernel DRM drivers break with IOMMU
> for you? I'll may probably add a similar temporary workaround for AMD
> IOMMU too...

The Intel one definitely broke -- I don't know about the others. There
are some old patches at http://people.freedesktop.org/~zhen/agp-mm-*
which make it look like _all_ AGP drivers are broken.

I wouldn't bother adding the workaround -- as I said, I'm planning to
rip it out of 2.6.32 (and in linux-next as soon as it's reasonable to do
so). Let's just let them fix it.

--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation