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xen-devel
Re: [Xen-devel] AMD 890FX and IOMMU
Hmm i'm interested too,
Does booting xen on this system show the enabling of a hardware iommu or not
(could be it is enabled by default and can't be disabled by bios, so although
there isn't a bios option it perhaps does work) ?
I allready have a motherboard with VT-D and a broken bios, i'm not too eager to
buy another mobo with a broken iommu *sigh*.
The problem is no motherboard manufacturer seems to advertise with it having a
iommu, so it seems to be some kind of a gamble and you can't fallback on the
advert that they should support it.
Would indeed be nice to have some sort of whitelist of 890fx mobo's with
properly functioning iommu's by experience of users.
And perhaps a chance for AMD to address it with mobo manufacturers.
--
Sander
> Hi!
> I don't know if this hardware information is off topic, but at 9th of
> may "Huang2, Wei" wrote a mail to this list with the information that
> the AMD 890FX chipset supports IOMMU.
> "Huang2, Wei":
> I can confirm that AMD 890FX supports IOMMU v1.22. It was briefly
> mentioned by external sites, such as
> http://techreport.com/articles.x/18825. It looks like Asus, Gigabyte and
> MSI will ship motherboards with 890FX chipset. Xen 4.0 fully supports
> AMD IOMMU v1.2. Note that IOMMU needs support from BIOS (ACPI IVRS
> table). Please pay a bit attention to this area.
> Now the 890FX is released and I bought a board just for testing/using
> this feature (ASrock 890FX Deluxe3). But for my frustration there is no
> option to enable iommu support in the bios.
> Support of ASrock tells me that the 890FX do not support IOMMU.
> I searched the internet and found several information that it supports
> it, but on AMD websites is nothing about it.
> Can anyone tell me a manufacturer and model of a mainboard which
> supports IOMMU??
> I know that the server chipset SR56XX support IOMMU and they are almost
> identical.
> So my question is: Is there anyone who has a board with 890FX chipset
> with working IOMMU support?
> Regards,
> Jens
--
Best regards,
Sander mailto:linux@xxxxxxxxxxxxxx
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