Re: [Xen-devel] Xen 4.6 Development Update (three months reminder)

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 28/04/15 23:17, Jim Fehlig wrote:
> Jim Fehlig wrote:
> > wei.liu2@xxxxxxxxxx wrote:
> >    
> > > Hi all
> > >
> > > We are now three months into 4.6 development window. This is an email to keep
> > > track of all the patch series I gathered. It is by no means complete and / or
> > > acurate. Feel free to reply this email with new projects or correct my
> > > misunderstanding.
> > >    
> > >      
> > [...]
> >    
> > > *  libxl: add qxl vga interface support for upstream qemu (fair)
> > >    -  Fabio Fantoni
> > >    
> > >      
> > I've been working on SPICE support in the libvirt libxl driver and
> > quickly came across the lack of support for qxl device.  What is the
> > status of this work?  AFAICT, there was a v16 posted nearly a year ago
> > with no comments
> >
> > http://lists.xen.org/archives/html/xen-devel/2014-05/msg03214.html
> >    
> After playing with this more, I think the patch will need a
> LIBXL_HAVE_QXL or similar in libxl.h.
>
> > I noticed this work was committed in the 4.3 dev cycle, but was reverted
> > before the release by commit 5479961a, which describes problems with
> > "instructions that cannot be used for MMIO".  Has any progress been made
> > on that front?  Is Fabio's patch the only piece missing to support qxl
> > devices?
> >    
> I've tried Fabio's patch on top of fairly recent xen-unstable and don't
> see the issues mentioned in the commit message of 5479961a.  Note that I
> only tried linux HVM guests though.
16byte decomposed instruction still don't get passed correctly to the 
device model.
This has been discussed at the hackathon and plan is in place.

~Andrew

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