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Re: [Xen-devel] bogus motherboard? IOMMU does not work

from [Konrad Rzeszutek Wilk]

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To:	Csillag Kristóf <csillag.kristof@xxxxxxxxx>
Subject:	Re: [Xen-devel] bogus motherboard? IOMMU does not work
From:	Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date:	Fri, 2 Jul 2010 12:05:28 -0400
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On Fri, Jul 02, 2010 at 04:03:04PM +0200, Csillag Kristóf wrote:
> Hi all,
> 
> I would like to get my system to work with IOMMU.

You can't with that motherboard.

> 
> (The long-term goal is VGA passthru.)
> 
> System is as follows:
> 
> CPU: Core 2 Duo E6600
> MB: Foxconn G9657MA-8EKRS2H (w. latest bios: 631F1P61)
> Virtualization support is enabled in BIOS. (These is only one option.)
> 
> Hypervisor: xen 4.0.0 from Debian, AMD64
> Xen config: iommu=verbose
> output of xen dmesg is attached.
> 
> HVM domains work (lasd tried with xen 3.2), but IOMMU is disabled,
> according to xen dmesg.
> 
> What can I do to increase the chances of getting this to work?

Get a new motherboard that has the VT-d chipset. This is not a software
feature, but a chipset on the board.

Look at this list: http://en.wikipedia.org/wiki/List_of_Intel_chipsets
and look for VT-d.

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