From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juergen Gross <jgross@suse.com>
Subject: Re: [PATCH V3 4/6] xl: add pvusb commands
Date: Wed, 20 May 2015 16:33:30 +0200
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To: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: Lars Kurth <lars.kurth@citrix.com>, Wei Liu <wei.liu2@citrix.com>, Ian Campbell <ian.campbell@citrix.com>, Chunyan Liu <cyliu@suse.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Ian Jackson <ian.jackson@citrix.com>, Simon Cao <caobosimon@gmail.com>
List-Id: xen-devel@lists.xenproject.org

On 05/20/2015 04:20 PM, George Dunlap wrote:
> On Mon, Apr 20, 2015 at 9:12 AM, Juergen Gross <jgross@suse.com> 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@suse.com>
>>> Signed-off-by: Simon Cao <caobosimon@gmail.com>
>>> ---
>>> 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