Re: Re[2]: [Xen-devel] No VT-d with Xen 3.3/3.4rc3 on Intel-Board DQ45CB

[Tim Kaufmann <tk@xxxxxxxxxx>]

Am 20.05.2009 um 21:38 schrieb Sander Eikelenboom:

> Are you problems with VT-D and the Intel-Board DQ45CB fixed ?
Almost.

In fact, the hang occurs with RAM > 2 GB and is caused by a BIOS  
error. As one of the Intel guys on this list told me after several  
tests:
> Please let me offer more technical details about the hang you suffer  
> from:
> Due to the very very big and bad rmrr->end_address  
> 0xffffffffbfffffff, in setup_dom0_rmrr() ->  
> iommu_prepare_rmrr_dev(),  intel_iommu_map_page() is invoked too too  
> many times and you see the hang...
I already received a patch for Xen 3.4RC4 which I can properly enable  
VT-d with. But there'll be a BIOS-Update soon, they promised.
Tim


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