From: Christoph Hellwig <hch@infradead.org>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: Christoph Hellwig <hch@infradead.org>,
akpm@osdl.org, Ian.Pratt@cl.cam.ac.uk,
linux-kernel@vger.kernel.org, Rik van Riel <riel@redhat.com>,
kurt@garloff.de, Christian.Limpach@cl.cam.ac.uk
Subject: Re: [PATCH] Xen/i386 cleanups - AGP bus/phys cleanups
Date: Wed, 16 Mar 2005 19:06:11 +0000 [thread overview]
Message-ID: <20050316190611.GA27945@infradead.org> (raw)
In-Reply-To: <521a4568db3e955cb245d10aaba2d3ce@cl.cam.ac.uk>
On Wed, Mar 16, 2005 at 06:35:28PM +0000, Keir Fraser wrote:
>
> On 16 Mar 2005, at 18:10, Christoph Hellwig wrote:
>
> >On Wed, Mar 16, 2005 at 10:01:07AM -0500, Rik van Riel wrote:
> >>In the case of AGP, the AGPGART effectively _is_ the
> >>IOMMU. Calculating the addresses right for programming
> >>the AGPGART is probably worth fixing.
> >
> >Well, it's a half-assed one. And some systems have a real one.
> >
> >But the real problem is that virt_to_bus doesn't exist at all
> >on architectures like ppc64, and this patch touches files like
> >generic.c and backend.c that aren't PC-specific. So you
> >effectively break agp support for them.
>
> The AGP driver is only configurable for ppc32, alpha, x86, x86_64 and
> ia64, all of which have virt_to_bus.
and ppc64 now, which doesn't.
next prev parent reply other threads:[~2005-03-16 19:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-16 11:48 [PATCH] Xen/i386 cleanups - AGP bus/phys cleanups Keir Fraser
2005-03-16 14:31 ` Christoph Hellwig
2005-03-16 14:58 ` Keir Fraser
2005-03-16 15:01 ` Rik van Riel
2005-03-16 18:10 ` Christoph Hellwig
2005-03-16 18:35 ` Keir Fraser
2005-03-16 18:42 ` Jesse Barnes
2005-03-16 19:08 ` Keir Fraser
2005-03-16 19:06 ` Christoph Hellwig [this message]
2005-03-16 19:11 ` Keir Fraser
2005-03-16 17:40 ` Alan Cox
2005-03-16 17:54 ` Jesse Barnes
2005-03-16 21:24 ` Paul Mackerras
2005-03-16 22:06 ` Jesse Barnes
2005-03-16 23:55 ` Rik van Riel
2005-03-17 0:39 ` Paul Mackerras
2005-03-17 1:05 ` Tupshin Harper
2005-03-17 3:44 ` Rik van Riel
2005-03-17 4:42 ` Christoph Hellwig
2005-03-17 4:58 ` Rik van Riel
2005-03-17 9:16 ` Keir Fraser
2005-03-17 9:34 ` Paul Mackerras
2005-03-17 10:56 ` Keir Fraser
2005-03-19 10:07 ` Eric W. Biederman
2005-03-19 10:56 ` Christian Limpach
2005-03-19 13:01 ` Keir Fraser
2005-03-17 13:53 ` Alan Cox
2005-03-18 0:16 ` Paul Mackerras
2005-03-18 4:23 ` Rik van Riel
2005-03-18 9:05 ` Keir Fraser
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