[Xen-devel] AMD 890FX and IOMMU

[Jens Krehbiel-Gräther <jens.krehbiel-graether@xxxxxxxxxxxxxxxxxx>]

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

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