On 18 Mar 2005, at 00:16, Paul Mackerras wrote:
That sounds like a good way to make AGP accesses slower. :)
Seriously, given that AGP is a technology that is being superseded by PCI Express, I think it's reasonable to look at the range of current implementations to see what we have to cope with. So I don't think it's worth worrying too much about the possibility of GARTs that go through the IOMMU. However, the idea of having phys_to_agp/agp_to_phys (or virt_to_agp/agp_to_virt) sounds like it wouldn't be too much effort, if it would help Xen.
I'll post a patch for this next week. Thanks for your patience so far!
-- Keir
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