Re: [Xen-users] xen forum

[Gordan Bobic <gordan@bobich.net>]

On 05/22/2013 04:52 PM, Gordan Bobic wrote:
> On Wed, 22 May 2013 16:32:33 +0100, George Dunlap
> <george.dunlap@eu.citrix.com> wrote:
>> On 22/05/13 16:27, Gordan Bobic wrote:
>>> On Wed, 22 May 2013 10:58:30 +0100, George Dunlap
>>> <George.Dunlap@eu.citrix.com> wrote:
>>>> On Wed, May 22, 2013 at 10:53 AM, Ian Campbell
>>>> <Ian.Campbell@citrix.com> wrote:
>>>>> On Wed, 2013-05-22 at 07:55 +0100, Gordan Bobic wrote:
>>>>>> Along with a wiki for documentation that is actually kept updated
>>>>>> when
>>>>>> features are added/removed/changed and more importantly, that clearly
>>>>>> states if/when obvious features are unexpectedly and conspicuously
>>>>>> missing
>>>>>
>>>>> The beauty of a wiki is that anyone can edit or correct it.
>>>>>
>>>>> We have regular documentation days where we are all (users and devs
>>>>> alike) encouraged to work to improve the state of the wiki and other
>>>>> documentation.
>>>>>
>>>>> http://wiki.xen.org/wiki/Xen_Document_Days
>>>>>
>>>>> The state of the Xen documentation base has actually improved
>>>>> considerably over the last year due to this initiative.
>>>>>
>>>>>> (e.g. domU config file method of passing multiple USB devices to
>>>>>> domU).
>>>>>
>>>>> I'm not sure what you are referring to here, the config file syntax is
>>>>> documented in docs/man/xl.cfg.pod.5 which is installed as the
>>>>> xl.cfg(5)
>>>>> manpage. It is also available online
>>>>> http://xenbits.xen.org/docs/unstable/man/xl.cfg.5.html and referenced
>>>>> from the wiki e.g. http://wiki.xen.org/wiki/Xen_Man_Pages
>>>>>
>>>>> This manpage contains:
>>>>>         =item B<usbdevice=[ "DEVICE", "DEVICE", ...]>
>>>>
>>>> This is a new feature for 4.3 -- 4.2 and earlier don't support
>>>> multiple USB devices (including say, a host device and an emulated usb
>>>> tablet).
>>>
>>> Is this an xl-only feature or will it work with xl as well?
>>
>> It will work with both xl and xl, but not with xm. :-)
>
> Hmm... Are there any outstanding issues with xl and PCI / VGA passthrough?
>
> I'm sure I read on the (possibly out of date) wiki that with xl
> PCI passthrough requires FLR, which 99% of devices lack (i.e. makes
> it useless to anyone wanting to do any kind of PCI passthrough).
>
> Perhaps I'll try my VMs with xl tonight and see what, if anything,
> breaks and raise it before time's up for 4.3 release...

OK, I can confirm that my VM configs start OK using xl. Unfortunately, 
xl in 4.2 doesn't support usb-add, so I cannot pass the required USB 
devices through, over and above the one I can pass in the config file.

Will usb-add also be available in 4.3, in addition to the multi-device 
syntax in the config file?

Any chance of the multi-device syntax also being patched into xm for 4.3?

Gordan