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

To: Christian Tramnitz <chris.ace@xxxxxxx>
Subject: Re: [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: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 22 Mar 2010 11:55:21 +0200
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On Mon, Mar 22, 2010 at 10:22:16AM +0100, Christian Tramnitz wrote:
> 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.

Yep, got it. Thanks.

-- Pasi

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