Xen devel - Dec 2005 - Build failures (x86_64, IOMMU, Xen 3.0.0)

Does Xen 3.0.0 actually support the IOMMU on x86_64?  I''ve tried
building
with a couple of different configurations, and it always fails if I''ve
enabled CONFIG_GART_IOMMU.  The problems center around undefined references
to functions such as dma_alloc_coherent, dma_free_coherent, iommu_setup,
iommu_hole_init, force_iommu, iommu_aperture_allowed, and so on.  In all
cases, changing the config to turn off GART_IOMMU (and hence enabling
DUMMY_IOMMU) allows the build to proceed to a conclusion (of sorts).

I''m happy if the answer is "it''s broken, use
DUMMY_IOMMU" (as I have no
machines to support with >4GB of RAM at the moment), but if it is supposed
to work, I''d like to work out why it isn''t.  Any takers to
help me out?
<grin>

- Matt

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On Tue, Dec 20, 2005 at 02:27:26PM +1100, Matthew Palmer
wrote:
> Does Xen 3.0.0 actually support the IOMMU on x86_64?
Not that I know. Mark Langsdorf from AMD (CC''d) was working on it, but
I don''t think patches to enable it went into the tree.

Cheers,
Muli
-- 
Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/


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