On Tue, 2013-07-02 at 10:14 +0100, Paul Durrant wrote: > > -----Original Message----- > > From: Ian Campbell > > Sent: 02 July 2013 09:57 > > To: Paul Durrant > > Cc: qemu-devel@nongnu.org; xen-de...@lists.xen.org > > Subject: Re: [Xen-devel] [PATCH] Citrix PV Bus device > > > > On Tue, 2013-07-02 at 09:39 +0100, Paul Durrant wrote: > > > This patch introduces a new PCI device which will act as the binding point > > > for Citrix branded PV drivers for Xen. > > > The intention is that Citrix Windows PV drivers will be available on > > > Windows > > > Update and thus using the existing Xen platform PCI device as an anchor > > > point is not desirable as that device has been ubiquitous in HVM guests > > > for > > > a long time and thus existing HVM guests running Windows would start > > > automatically downloading drivers from Windows Update when this may > > not be > > > desired by either the host or guest admin. > > > > What about > > <9aae0902d5bc7e449b7c8e4e778abcd0053...@lonpex01cl01.citrite.net> > > ? > > > > I had actually coded up a solution based on the existing Xen platform > device, by having it synthesize a device ID based on the Xen version > to which we could then host the xenbus driver, to allow us to deploy > multiple versions of xenbus should compatibility (with things such as > the shared info interface) become an issue. The co-installer for this > driver could also spot existing PV driver installations and make sure > they don't get trashed.
I think only this last bit of functionality is critical here, and it allows us to avoid having to carry multiple platform devices in upstream, doesn't it? > This idea was rejected by Citrix product teams though, because we > would not be able to prevent any Windows guest without some known PV > drivers from downloading our new driver from Windows Update and this > was seen as undesirable. Well, if your product requirements are at odds with doing the right thing upstream then I think it would be best for you to just carry patches to make XS behave how you want. I hope we can find a suitable compromise though. Ian.
