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Re: [Xen-devel] Questions about PCI passthrough in Xen

To: River Wang <jwangzju@xxxxxxxxx>
Subject: Re: [Xen-devel] Questions about PCI passthrough in Xen
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Tue, 27 Jan 2009 22:48:34 +0200
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On Tue, Jan 27, 2009 at 03:10:16PM -0500, River Wang wrote:
> Hi:
> 
> I am trying to understand the current pass-through device in Xen.  To
> my understanding, Xen can hide a PCI device from Dom 0 and exclusively
> assign it to a guest OS (dom U), right?
> Does Xen support to assign one device to multiple guest OSes? Does
> current pass through require Intel -VT or AMD SVM? Where is the source
> file for the pass-through function? Is it in xen/drivers/passthrough?
>

Xen PCI passthrough to PV guests is supported without VT/VT-d, and has
been available for a while.. 

Xen PCI passthrough to HVM guests (Windows) requires VT-d (in addition to VT)
and more recent version of Xen.

-- Pasi

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