Re: [Xen-devel] Xen 4.3 development update

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Oct 02, 2012 at 03:56:02PM +0100, Ian Campbell wrote:
> On Tue, 2012-10-02 at 15:50 +0100, Pasi Kärkkäinen wrote:
> > On Tue, Oct 02, 2012 at 03:32:41PM +0100, Ian Campbell wrote:
> > > 
> > > > >  * xl USB pass-through for HVM guests using Qemu USB emulation
> > > > >    owner: ? 
> > > > >    status: ?
> > > > >    - xm/xend with qemu-traditional supports USB passthrough to HVM 
> > > > > guests using the Qemu emulated USB controller.
> > > > >    - port the xm/xend functionality to xl.
> > > > >    - make sure USB passthrough with xl works with both 
> > > > > qemu-traditional and qemu-upstream.
> > > > >    - The HVM guest does not need any special drivers for this feature.
> > > > 
> > > > I think this is just a matter of plumbing in libxl (presumably, now,
> > > > plumbing to qemu-upstream).
> > > 
> > > Assuming qemu-upstream has the necessary feature...
> > > 
> > 
> > Yes, qemu-upstream supports host USB device pass-through.
> > 
> > references:
> > http://www.linux-kvm.org/page/USB_Host_Device_Assigned_to_Guest
> > http://david.wragg.org/blog/2009/03/using-usb-pass-through-under-libvirt.html
> > http://david.wragg.org/blog/2009/03/usb-pass-through-with-libvirt-and-kvm.html
> > 
> > So basicly the qemu cmdline needs to have:
> > -usb -usbdevice host:xxxx:yyyy
> 
> If you do this via xl's device_model_args= config option then does this
> Just Work?
> 

It should work. Someone has to try it.. 
(I'm currently away from the machine where I could test this.)

-- Pasi
 

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