RE: [Xen-devel] No VT-d with Xen 3.3/3.4rc3 on Intel-Board DQ45CB

[Ross Philipson <Ross.Philipson@xxxxxxxxxx>]

> my system: Intel DQ45CB with latest BIOS (0079 as of April 6th 2009) and VT-d 
> enabled, Core 2 Quad Q9550 (E0), 8 GB RAM.

You said it is an Intel system; is the over all system an OEM system or a 
custom assembly? Whose BIOS is ver 0079?

The trace below is much like the tail end of the trace we saw when we 
encountered a problem like this. Can you try using "iommu_inclusive_mapping=1" 
on the xen boot command line? This works around a VT-d related BIOS issue.

Thanks
Ross

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tim Kaufmann
Sent: Sunday, April 26, 2009 10:51 AM
To: xen-devel
Subject: Re: [Xen-devel] No VT-d with Xen 3.3/3.4rc3 on Intel-Board DQ45CB


Am 26.04.2009 um 16:29 schrieb Tim Kaufmann:

> Installed Debian Lenny and compiled 2.6.18.8 / Xen 3.4rc3 - same  
> result as above.

May be it's interesting to know the last messages before this setup  
hangs:

(XEN) Brought up 4 CPUs
(XEN) Intel VT-d Snoop Control not supported.
(XEN) Intel VT-d DMA Passthrough not supported.
(XEN) Intel VT-d Queued Invalidation not supported.
(XEN) Intel VT-d Interrupt Remapping not supported.
(XEN) I/O virtualisation enabled
(XEN) I/O virtualisation for PV guests disabled
(XEN) CPUIDLE: disabled due to no HPET. Force enable with "cpuidle".

The latter one disappears when I turn on HPET in BIOS.

Tim



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