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Re: [Xen-users] usb passthrough

To: "Sergio Charpinel Jr." <sergiocharpinel@xxxxxxxxx>
Subject: Re: [Xen-users] usb passthrough
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Fri, 26 Feb 2010 16:49:14 +0200
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On Fri, Feb 26, 2010 at 09:49:38AM -0300, Sergio Charpinel Jr. wrote:
> Hi,
> 
> I want to use a webcam in a HVM guest, but my dom0 doesnt support VT-d
> (just VT).
> 

USB passthrough doesn't require VT-d, it's only required for PCI device 
passthrough to HVM guests.

> I tried passing the parameters usb=1 and usbdevice = [ '..' ] and I
> could see an usb device in domU. But it does not know which device is.
> 
> Which are the possibilites to do that? I prefer to use hvm machines,
> but if it is not possible, with PV machines it can work?
> 

With PV guest you could passthrough the whole USB controller (the PCI device).. 

-- Pasi


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