lkml.org 
[lkml]   [2009]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: IOMMU and graphics cards
On Thu, May 07, 2009 at 11:22:01AM +0100, David Woodhouse wrote:
> On Thu, 2009-05-07 at 12:01 +0200, Joerg Roedel wrote:
> > > Looks like the DRM code uses the DMA API.
> >
> > The proprietary drivers make problems so far. For the ATI one I am in
> > contact with the developers to try to fix it. But I can't do anything
> > about the other proprietary driver I am aware of :-(
>
> I see no harm in "breaking" code which was already broken. If that's the
> only reason we're enabling the graphics workaround, let's turn it off.

Well, it is not that simple. Having no workaround at all will not result
in working proprietary drivers. More likely is that distros just disable
the IOMMU because their customers want to use these drivers for working
3d acceleration.
As I wrote in the original mail I think we should just make sure that
these drivers still work with an IOMMU without disabling device
isolation.

Joerg

--
| Advanced Micro Devices GmbH
Operating | Karl-Hammerschmidt-Str. 34, 85609 Dornach bei München
System |
Research | Geschäftsführer: Thomas M. McCoy, Giuliano Meroni
Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München
| Registergericht München, HRB Nr. 43632
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-05-07 14:19    [from the cache]
©2003-2011 Jasper Spaans