Re: usbdevice option and specifying a specific device

[Gordan Bobic <gordan@bobich.net>]

 On Mon, 5 Aug 2013 12:24:40 +0100, George Dunlap 
 <george.dunlap@eu.citrix.com> wrote:
> On 31/07/13 11:12, Ian Campbell wrote:
>> On Wed, 2013-07-31 at 09:25 +0100, George Dunlap wrote:
>>> On 30/07/13 09:23, Ian Campbell wrote:
>>>> On Mon, 2013-07-29 at 20:17 +0100, Gordan Bobic wrote:
>>>>> I'm trying to use usbdevice option in the config file (instead of
>>>>> passing USB PCI devices), and the documentation says to specify 
>>>>> the
>>>>> device in the form host:xxxx:yyyy where xxxx:yyyy is the USB
>>>>> vendor:device ID.
>>>>>
>>>>> Except there is a problem with this - I have two identical 
>>>>> keyboards and
>>>>> mice, one set of which I want to pass to the host, and the other 
>>>>> set
>>>>> which I want to pass to the guest. Since the xxxx:yyyy will be 
>>>>> the same
>>>>> for both devices of each type, how can I deterministically 
>>>>> specify which
>>>>> I want to keep on the host and which I want to pass to the guest?
>>>>>
>>>>> Is there a way to use something like BusID:DeviceID instead in 
>>>>> order to
>>>>> provide a more deterministic outcome?
>>>> I think George (CCd) had some plans to improve this initial
>>>> implementation in the 4.4 time frame.
>>>>
>>>> Since it looks like the devices which you pass are given direct to
>>>> qemu's -usbdevice option it seems like host:bus.addr should work 
>>>> too.
>>>> "Supporting" this option is perhaps just a docs patch away?
>>> Yes, I think "host:bus.addr" should work as well.  Let us know if 
>>> it
>>> doesn't.
>> If it does then we should add it to our docs as something which we
>> support passing on to qemu.
>
> Gordan, did you try this?

 Yes, it works, but only if BusID != 8. See the bug report I posted
 yesterday. I will double check tonight whether the BusID=8 gets
 clobbered into BusID=0 at xl or qemu-dm level.

 Gordan