From: David Woodhouse <dwmw2@infradead.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Dave Airlie <airlied@gmail.com>,
Keir Fraser <kier.fraser@eu.citrix.com>,
xen-devel@lists.xensource.com,
Joerg Roedel <joerg.roedel@amd.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Zhenyu Wang <zhenyu.z.wang@intel.com>
Subject: Re: [Xen-devel] Re: [RFC] Make AGP work with IOMMU
Date: Wed, 05 Aug 2009 07:44:56 +0100 [thread overview]
Message-ID: <1249454696.9324.325.camel@macbook.infradead.org> (raw)
In-Reply-To: <4A78C9C6.6010103@goop.org>
On Tue, 2009-08-04 at 16:52 -0700, Jeremy Fitzhardinge wrote:
> And just when I have patches to use them for their original purpose...
>
> Looking back over the thread, are you saying that most users are already
> using the DMA API correctly for AGP accesses? If that's true then we
> should be just fine.
No, not 'most users'. But perhaps we should.
All we've done so far is make intel-agp use the DMA API correctly. And
that's conditional on CONFIG_DMAR. But we could make it unconditional,
and make the other drivers do it too. The code is all fairly generic.
Without an IOMMU, the overhead would be fairly minimal.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
next prev parent reply other threads:[~2009-08-05 6:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-27 15:04 David Woodhouse
2009-07-29 6:28 ` Dave Airlie
2009-07-29 7:15 ` David Woodhouse
2009-07-29 8:43 ` Dave Airlie
2009-07-29 9:01 ` David Woodhouse
2009-07-29 9:36 ` David Woodhouse
2009-08-03 6:50 ` Zhenyu Wang
2009-08-03 8:39 ` David Woodhouse
2009-08-04 23:52 ` [Xen-devel] " Jeremy Fitzhardinge
2009-08-05 6:44 ` David Woodhouse [this message]
2009-08-05 6:57 ` Dave Airlie
2009-08-05 7:08 ` David Woodhouse
2009-08-05 18:26 ` Jeremy Fitzhardinge
2009-08-05 23:12 ` Dave Airlie
2009-08-06 19:32 ` Jeremy Fitzhardinge
2009-08-06 19:36 ` David Woodhouse
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