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xen-devel
Re: [Xen-devel] Re: [RFC] Make AGP work with IOMMU
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To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Subject: |
Re: [Xen-devel] Re: [RFC] Make AGP work with IOMMU |
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From: |
David Woodhouse <dwmw2@xxxxxxxxxxxxx> |
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Date: |
Thu, 06 Aug 2009 20:36:21 +0100 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, Zhenyu Wang <zhenyu.z.wang@xxxxxxxxx>, Joerg Roedel <joerg.roedel@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, Dave Airlie <airlied@xxxxxxxxx>, Keir Fraser <kier.fraser@xxxxxxxxxxxxx> |
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Thu, 06 Aug 2009 12:36:51 -0700 |
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On Thu, 2009-08-06 at 12:32 -0700, Jeremy Fitzhardinge wrote:
> On 08/05/09 16:12, Dave Airlie wrote:
> > My main problem with doing this is getting testing coverage on older
> > systems, if we change all the AGP drivers, the time to find we busted
> > something is probably not until the next major distro release with this code
> > in it. So people can run stuff on 5 year old hardware in 6 months? I'm
> > not sure the gains justify the costs, but if you guys really want to do it
> > I'll take the patch, just be prepared to have it ripped out the minute
> > we get a regression we can't figure out because we haven't got the hw
> > anymore.
> >
>
> Can you point to some changesets/patches to act as an example/template
> for the changes needed?
http://git.infradead.org/users/dwmw2/iommu-agp.git/shortlog/ba3139f2577eee24479db73b8dfc7d78eaf4c486
Some of the code added to intel-agp should probably be generic.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@xxxxxxxxx Intel Corporation
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