Re: [Xen-devel] [PATCH V3 4/6] xl: add pvusb commands

[Juergen Gross <jgross@xxxxxxxx>]

On 05/20/2015 04:20 PM, George Dunlap wrote:
> On Mon, Apr 20, 2015 at 9:12 AM, Juergen Gross <jgross@xxxxxxxx> wrote:
> > On 04/19/2015 05:50 AM, Chunyan Liu wrote:
> > > Add pvusb commands: usb-ctrl-attach, usb-ctrl-detach, usb-list,
> > > usb-attach and usb-detach.
> > >
> > > To attach a usb device to guest through pvusb, one could follow
> > > following example:
> > >
> > >    #xl usb-ctrl-attach test_vm version=1 num_ports=8
> > >
> > >    #xl usb-list test_vm
> > >    will show the usb controllers and port usage under the domain.
> > >
> > >    #xl usb-attach test_vm 1.6
> > >    will find the first usable controller:port, and attach usb
> > >    device whose bus address is 1.6 (busnum is 1, devnum is 6)
> > >    to it. One could also specify which <controller> and which <port>.
> > >
> > >    #xl usb-detach test_vm 1.6
> > >
> > >    #xl usb-ctrl-detach test_vm dev_id
> > >    will destroy the controller with specified dev_id. Dev_id
> > >    can be traced in usb-list info.
> > >
> > > Signed-off-by: Chunyan Liu <cyliu@xxxxxxxx>
> > > Signed-off-by: Simon Cao <caobosimon@xxxxxxxxx>
> > > ---
> > > Changes to v2:
> > >     * use bus.addr as user interface instead of busid in usb-attach|detach
> > >     * remove usb-assignable-list interface
> >
> > Why? While lsusb in combination with xl usb-list for each domain will
> > give the same information, having to iterate through all domains can be
> > quite annoying.
> >
> > An alternative would be to accept omitting the domain for xl usb-list
> > and list all domains with assigned usb devices in this case.
> I don't understand what information it is that you want.  Do you want
> a list of devices *not already assigned* to domains?
Yes.

Juergen


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