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Re: [Xen-devel] Booting Xen 3.4 with iommu=1 causes boot to hang

To: Tom Rotenberg <tom.rotenberg@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Booting Xen 3.4 with iommu=1 causes boot to hang
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Sun, 24 May 2009 12:43:36 +0100
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On 24/05/2009 12:09, "Tom Rotenberg" <tom.rotenberg@xxxxxxxxx> wrote:

> It looks like some kind of a problem in Xen IOMMU code, no? Anyone has any
> clue regarding this?

There are plenty of broken BIOSes out there that don't correctly support
VT-d. Try adding iommu_inclusive_mapping as an extra Xen boot parameter --
this workaround is often successful.

 -- Keir



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