From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Subject: Re: [Patch V4 1/3] usb: Add Xen pvUSB protocol description Date: Fri, 24 Jul 2015 00:29:03 +0300 Message-ID: <20150723212903.GA21789@reaktio.net> References: <1435042405-14235-1-git-send-email-jgross@suse.com> <1435042405-14235-2-git-send-email-jgross@suse.com> <20150722234640.GA29425@kroah.com> <55B067D7.3030904@suse.com> <20150723043653.GA31524@kroah.com> <55B08DB9.60902@suse.com> <20150723190801.GC11060@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20150723190801.GC11060@kroah.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Greg KH Cc: Juergen Gross , xen-devel@lists.xensource.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, david.vrabel@citrix.com, boris.ostrovsky@oracle.com List-Id: xen-devel@lists.xenproject.org On Thu, Jul 23, 2015 at 12:08:01PM -0700, Greg KH wrote: > > Somewhere that people can refer to that describes this public-facing API > that "must not ever be broken or changed". If you want to put it in a > documentation file, or a .h file, I don't care. > > > >>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 > > This shouldn't be a kernel/kernel compability issue, as the api talks > between Xen and the OS, not between different OSs, right? > > > and possibly other operating systems (BSD?, Windows?) which already > > might be using pvUSB with a Dom0 based on the SUSE xen kernel. > > Are there other operating system drivers today that use this API? Is > this an API in the Xen core today that we have to support? > > Some more background / descriptions would be nice to have. > For example Xen "GPLPV" drivers for Windows do have PVUSB frontend driver.. -- Pasi > thanks, > > greg k-h >