[Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU: (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 00000a07:00000000 to 00000000:00000000.

[Christian Tramnitz <chris.ace@xxxxxxx>]

At 22.03.2010 10:19, Pasi Kärkkäinen wrote:
> Yeah, that's what I meant. Ok.
>
> I thought it was also possible to use VT-d for a PV guest? no?
>
> -- Pasi
It is, but this requires iommu=pv as hypervisor boot flag.
With iommu=1 you can see in the hypervisor log that VTd will be disabled 
for PV.

Best regards,
   Christian


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