Re: IOMMU

Andrew Bobulsky
Sat, 06 Oct 2012 22:56:12 -0000

On Oct 2, 2012, at 3:01 PM, Michael Johansen <michspra@live.no> wrote:

 Hi there,

I need full IOMMU support for virtualization with an AMD FX-8150 cpu. I am
therefore wondering what "cheap" motherboard has full IOMMU support
(with
the ACPI IVRS table) or that has a beta-BIOS available to enable these
features.

Any help appriciated.

Best regards,
Michael

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Hello Michael,

My apologies, the answer for this is a quick one, and I should have gotten
back with you sooner, as I''m not sure if anyone else has used this
particular chip in an IOMMU setup... well, anyone else on the mailing list
anyway ;)

I can''t speak to the support of an ACPI IVRS table (mostly because I
don''t
know what that is!), but I''ve done passthrough with that chip
successfully
on Xen (just proof of concept testing) and extensively on ESXi.  GPLPV
doesn''t seem to like full AMD setups when passing video cards.  This
may
not be accurate anymore, and I plan to try Xen on the build again, but a
friend of mine is holding the machine hostage. Perhaps I''ll get back to
that in another month or so :P

So! The board I can recommend for that chip is the Gigabyte GA-990FXA-UD7.
 I run the exact same chip in it and can confirm that IOMMU works.  If
there''s a way to tell through dmesg or something whether or not the
feature
you''re looking for works, and you''re willing to wait a couple
weeks for me
to get the box back into my hands, I can drop you a line if you like.  Just
let me know.

For more hardware information, check this thread out:
http://lists.xen.org/archives/html/xen-users/2012-09/msg00273.html

And hop down the link there for the rest of the components :)


Cheers,
Andrew Bobulsky