Re: [Xen-devel] [PATCH] Add Xen platform PCI device version 2.

[James Harper <james.harper@xxxxxxxxxxxxxxxx>]

> 
> > -----Original Message-----
> > From: Ian Campbell
> > Sent: 19 June 2013 10:42
> > To: Paul Durrant
> > Cc: qemu-devel@xxxxxxxxxx; xen-devel@xxxxxxxxxxxxx
> > Subject: Re: [Xen-devel] [PATCH] Add Xen platform PCI device version 2.
> >
> > On Wed, 2013-06-19 at 10:32 +0100, Paul Durrant wrote:
> > > The XenServer 6.1+ Citrix Windows PV bus driver binds to a new version
> > > of the Xen platform device (since the newer driver set cannot co-exist
> > > with previous drivers which bind to the existing "xen-platform" type of
> > > device). This patch introduces a new "xen-platform-2" device type with
> > > the appropriate device_id and revision.
> >
> > What is the difference between these two devices?
> >
> 
> As the comment implies, the device_id (2 rather than 1) and the revision (2
> rather than 1).
> 

Are the new drivers not backwards compatible?

Do any of the new driver names conflict with the old names? If not and if the 
bus driver in turn enumerates devices with different names than the old then 
the two should be able to exist side-by-side with only one being active 
depending on what the vm is configured with. 

James


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