Messages in this thread |  | | | From | Keir Fraser <> | | Subject | Re: [PATCH] Xen/i386 cleanups - AGP bus/phys cleanups | | Date | Wed, 16 Mar 2005 18:35:28 +0000 |
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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.
-- Keir
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