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[Xen-users] Unable to pass device to IOMMU

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Subject: [Xen-users] Unable to pass device to IOMMU
From: Satya Prasad Nemana <snemana@xxxxxxxxxx>
Date: Wed, 22 Sep 2010 09:33:15 +0100
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I’m hoping someone may be able to push us in the right direction.
I’m trying to get one of our products to work with the current branch of Xen (4.0/4.0.0) but I’m hitting a problem.
We are currently using Xen 3.3.2 on a Sun Blade 600 chassis (with x6270 blades) this works great.
But when we upgrade to Xen 4.0/4.0.1 we get the following message when starting the DomU:

                Device Cannot be passed to IOMMU

I understand from the release note that there were some changes made to the IOMMU/pciback pass-through in this release, does anyone have any details as to what might be going wrong?
We’re using SLES11/sp1 and I’ve tried with the Novell build and compiled it myself. I also have the latest firmware for the chassis and blade from Sun, all of which show the same problem.

Has anyone seen to same thing?

Any help would be greatly appreciated

Thanks in advance for your help.

Best Regards,

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