From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Bauer <stefan.bauer@cubewerk.de>
Subject: iommu: mapping reserved region failed - Q35 - VT-D Issue
Date: Wed, 29 Oct 2008 18:27:52 +0100
Message-ID: <49089D18.4030405@cubewerk.de>
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Xen 3.4 xen-unstable.hg from yesterday with debian etch on 64bit arch
Intel/Lenovo Q35 Mainboard with VT-d enabled

Bootoptions iommu=1 vtd=1
pci.backhide for a PCI-E nvidia graphiccard

xm dmesg Error messages includes:

[VT-D] iommu.c: 1694:d32767 iommu: mapping reserved region failed
[VT-D] iommu.c: 1542:d0 intel_iommu_add_device: context mapping failed

If i try to start my HVM by xm create win2k the system reboots

any ideas?

-- 
stefan