Groups > linux.kernel > #1190663

Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description

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From	Juergen Gross <jgross@suse.com>
Newsgroups	linux.kernel
Subject	Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description
Date	Thu, 23 Jul 2015 08:50:02 +0200
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On 07/23/2015 06:36 AM, Greg KH wrote:
> On Thu, Jul 23, 2015 at 06:04:39AM +0200, Juergen Gross wrote:
>> On 07/23/2015 01:46 AM, Greg KH wrote:
>>> On Tue, Jun 23, 2015 at 08:53:23AM +0200, Juergen Gross wrote:
>>>> Add the definition of pvUSB protocol used between the pvUSB frontend in
>>>> a Xen domU and the pvUSB backend in a Xen driver domain (usually Dom0).
>>>>
>>>> This header was originally provided by Fujitsu for Xen based on Linux
>>>> 2.6.18.
>>>>
>>>> Changes are:
>>>> - adapt to Linux style guide
>>>>
>>>> Signed-off-by: Juergen Gross <jgross@suse.com>
>>>> ---
>>>>   include/xen/interface/io/usbif.h | 252 +++++++++++++++++++++++++++++++++++++++
>>>
>>> Why is this a different interface than the existing ones we have today
>>> (i.e. usbip?)  Where is it documented?  Do the Xen developers /
>>
>> The interface definition is living in the Xen git repository for several
>> years now:
>>
>> git://xenbits.xen.org/xen.git -> xen/include/public/io/usbif.h
>
> That's header file, not a document describing the api here.

I suppose you want to tell me I should add something like:

Documentation/DocBook/usb/API-struct-urb.html

I can do this, of course.

>> It is used e.g. in SUSE's xen kernel since 2.6.18.
>
> I am very aware of the amount of Xen crap in SuSE's kernel, don't use
> that as an excuse for me to merge it to mainline :)

:-)

Wasn't meant as an excuse, just a hint why the interface can't be the
same as for usbip. We have to ensure compatibility with those kernels
and possibly other operating systems (BSD?, Windows?) which already
might be using pvUSB with a Dom0 based on the SUSE xen kernel.


Juergen

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Thread

Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description Greg KH <gregkh@linuxfoundation.org> - 2015-07-23 01:50 +0200
  Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description Greg KH <gregkh@linuxfoundation.org> - 2015-07-23 06:40 +0200
    Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description Juergen Gross <jgross@suse.com> - 2015-07-23 08:50 +0200
      Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description Greg KH <gregkh@linuxfoundation.org> - 2015-07-23 21:10 +0200
        Re: [Xen-devel] [Patch V4 1/3] usb: Add Xen pvUSB protocol  description Pasi Kärkkäinen <pasik@iki.fi> - 2015-07-23 23:40 +0200

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