Re: usbdevice option and specifying a specific device

[George Dunlap <george.dunlap@eu.citrix.com>]

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.

> Not sure if this varies depending on qemu-trad vs upstream, I only
> looked at the upstream manpage.

Command-line options to qemu are part of the stable interface, so it 
should work for both qemu-traditional and qemu-xen.

  -George