Re: Usb passthrough with upstream qemu question

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

On 25/09/13 15:11, Pasi Kärkkäinen wrote:
> On Tue, Sep 24, 2013 at 10:59:18AM +0100, George Dunlap wrote:
>> On 09/23/2013 03:46 PM, Fabio Fantoni wrote:
>>> I tested my latest patches about usb controllers (1-2-3) and usb
>>> redirection (from Spice client) support for upstream qemu and are working.
>>> I also tested usb passthrough (from dom0) but seems that with older
>>> -usbdevice paraters is not working.
>>> I see the qemu docs/qdev-device-use.txt and based on this I tried the
>>> new parameters, for example:
>>> device_model_args=["-device","usb-host,vendorid=0x058f,productid=0x6387"]
>>> With new parameters usb passthrough is working, also with new usb
>>> controller and also with usb redirection enabled.
>>> I did all tests using latest xen and qemu version (1.6).
>>> I think should be good to change upstream qemu parameters for usb
>>> passthrough on libxl with the new ones.
>> Yes, I think it would be better.  The main difficulty is that the
>> libxl parameter is basically the old-style usbdevice parameter
>> passed straight through.  To support the current libxl parameter
>> with the new qemu would mean interpreting the usbdevice parameter
>> and translating it into the new-style parameter.
>>
>> My USB hot-plug series begins to introduce a more reasonable
>> interface for USB devices. Once that's in, we can think about
>> introducing a similar new interface for creating domains, that
>> should match the new way of specifying devices better.  Then we
>> could just say, "If you're using spice, you have to use the new
>> interface."
>>
>> Unfortunately, it's looking like the USB hot-plug series may not
>> make it into 4.4 unless someone else can pick it up (or unless we
>> slip the feature freeze).
>>
> Hi,
>
> Is the latest version of the usb hotplug series posted to xen-devel,
> or are these not-yet-posted changes in your (private) tree?
>
> Just wondering if someone else wants to take a look at that.

The latest patches I posted were version 6; the 1/2 can be found here:

http://marc.info/?l=xen-devel&m=136638728928743

I can't remember if I went through and made any changes as a result of 
comments or not; My latest local version can be found here:

git://xenbits.xen.org/people/gdunlap/xen.git out/hvm-usb-hotplug.v6-plus

  -George