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[Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e us

from [Christian Tramnitz] [Permanent Link][Original]
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [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.
From: Christian Tramnitz <chris.ace@xxxxxxx>
Date: Mon, 22 Mar 2010 10:22:16 +0100
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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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