On 29 May 2013 15:25, George Dunlap <George.Dunlap@eu.citrix.com> wrote:

> On Wed, May 29, 2013 at 2:11 PM, Erwan PILLET
> <erwan.pillet@telecom-bretagne.eu> wrote:
> > Hi everyone,
> >
> > I installed xen from packages on Ubuntu 12.04, getting the version 4.1.2
> .
> > I wanted to use pvusb which I understand was functional on this version
> to
> > pass an USB hard drive to my DomU, but I only manage to get this error
> > trying to attach the device to a domain.
> >
> > It may also be worth mentionning that "xm usb-hc-destroy mydomu 0"
> doesn't
> > have any effect, so it doesn't give back any error (I get one if I try
> on an
> > unregistered devId) but don't remove the host controller.
> >
> > So should pvusb be fonctionnal on this version of xen/xm ? If yes, any
> help
> > would be highly appreciated.
>
> PVUSB requires support both from the toolstack and from the dom0
> kernel.  I believe PVUSB is only available in "classic Xen" kernels
> such as those supported by SuSE; I'm pretty sure that Ubuntu does not
> have one.
>
> To see if usbback is present, you can do the following:
>
> ls /sys/bus/usb/drivers/usbback
>
> If it gives you an error, then the problem is that your Ubuntu dom0
> kernel doesn't have PVUSB support.
>
>  -George
>


First, thanks for your help !
Indeed, there is no such file on my hypervisor, so I guess this kernel
doesn't support PVUSB.
Do you know if there is a way to patch the kernel to include this feature ?

-- 
Erwan