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

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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,

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