Re: [Xen-users] usb passthrough

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

Pvusb should work for most things. You might be thinking of the USB  
frontend in gplpv which only works with a very limited number of  
storage devices (and probably not at all since the last update)
James

Sent from my iPhone

On 27/02/2010, at 5:25, "chris" <tknchris@xxxxxxxxx> wrote:

> Pasi,
>
> I know, my understanding was that pvusb was simply for exposing usb
> mass storage as a block device to the domain. I've never actually used
> it but I believe you can do this with a hvm domain without anything
> special. If anyone can actually confirm this it would be good to know
> :)
>
> As far as his original question, he needs vt-d to passthrough any
> physical device to a hvm domain.
>
> - chris
>
> On Fri, Feb 26, 2010 at 10:03 AM, Pasi Kärkkäinen <pasik@xxxxxx> wro 
> te:
> > On Fri, Feb 26, 2010 at 10:00:34AM -0500, chris wrote:
> > > He said it was a HVM guest. I don't think you can passthrough to a  
> > > hvm
> > > domain anything except usb storage with pvusb, correct?
> > pvusb is different from the 'normal' usb=1 / usbdevice = [] stuff..
> >
> > I'm not totally sure what devices are supported with pvusb and with  
> > the normal usb passthrough.
> > -- Pasi
> >
> > > On Fri, Feb 26, 2010 at 9:49 AM, Pasi Kärkkäinen <pasik@xxxxxx>  
> > > wrote:
> > > > 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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