[libvirt] disable usb?

[Daniel P. Berrange]

On Fri, May 04, 2012 at 04:22:14PM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> Is there some way to disable usb altogether?  libvirt used to just pass
> in '-usb'.  With the arrival of usb2 support that changed into '-device
> uhci,...'.  Problem is that this breaks with several machine types such
> as isapc.  '-usb' is silently ignored in case the machine type can't
> handle usb.  '-device uhci,...' leads to an error message though and the
> guest doesn't start.
> 
> /me tried "<controller type='usb' model='none'/>" which didn't work.
> Just removing the controller from the xml doesn't work too, it gets
> automagically readded.

Sadly this isn't possible yet. The only way to make it possible would
be to use the model='none' idea as you mention, since that matches
the virtio-balloon approach.

Daniel
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