Re: [Xen-devel] IOMMU and AMD 890fx

[Leonardo Prosperi <leo.prosperi@xxxxxxxxx>]

Gigabyte motherboards don't support IOMMU:
http://forums.tweaktown.com/f69/ga-890fxa-ud5-iommu-bios-switch-39801/

MSI boards have the same problems:

http://comments.gmane.org/gmane.comp.emulators.xen.user/58630

ASUS Crosshair IV Formula has IOMMU, but I cannot find if it works with Xen.

On Sun, May 9, 2010 at 11:38 PM, Sander Eikelenboom <linux@xxxxxxxxxxxxxx> wrote:

Hello Wei,

I hope motherboard manufacturers do a better job with supporting this iommu in the bios than they did with intel's. Especially Asus made a mess of it, and hasn't fixed it in newer bioses for multiple motherboards.
And since all motherboard reviews don't mention nor test the iommu it's hard to know upfront if it's supported :-(

--

Sander

> Leonardo,

> 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.

> -Wei

> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Leonardo Prosperi
> Sent: Sunday, May 09, 2010 1:02 PM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] IOMMU and AMD 890fx


> Hi,
> All the reviews for the AMD 890fx chipset reported that it supports IOMMU v1.2.
> But I cannot find any mention of that on AMD site.

> Does 890fx support IOMMU?
> Do 890fx motherboards with IOMMU exist?
> Does Xen support 890fx?

> Regards,
> Leonardo

--
Best regards,
 Sander                            mailto:linux@xxxxxxxxxxxxxx

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