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RE: [Xen-devel] iommu: mapping reserved region failed - Q35 - VT-D Issue

Can you put some printk's in domain_context_mapping() to see at which point it 

If it is a BIOS problem, it is possible this function cannot find the matching 
vt-d engine for this device.


>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
>Stefan Bauer
>Sent: Wednesday, October 29, 2008 10:28 AM
>To: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: [Xen-devel] iommu: mapping reserved region failed - 
>Q35 - VT-D Issue
>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?
>Xen-devel mailing list
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