Re: [Xen-devel] [PATCH v1 0/2] libxl: add PV display device driver interface

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Apr 05, 2017 at 02:49:26PM +0100, Ian Jackson wrote:
> al1img . writes ("Re: [PATCH v1 0/2] libxl: add PV display device driver 
> interface"):
> > On Wed, Apr 5, 2017 at 2:05 PM, Ian Jackson <ian.jackson@xxxxxxxxxxxxx> 
> > wrote:
> > > Sorry to show my ignorance, but what is a "PV display device" ?
> > > Where is the backend ?  What protocol do the frontend/backend speak ?
> > 
> > This is PV display device which provides virtual screens for frontends.
> > We are working on the backend and frontend. They are currently under
> > development.
> 
> Thanks for the reference to
>    http://marc.info/?l=xen-devel&m=149137266022490&w=2
> which was very helpful.
> 
> I think you should combine this series with that patch.  That patch
> will need wider review and ack from Konrad (as our PV interface tsar);

Done, as in Reviewed-by and I am going to check it in once my 'before-staging' 
tests
finish.

> AFAICT you're working on that, but I would like to be CC'd on the
> mails too.
> 
> > > What are the parameters ?
> > 
> > It has two parameters:
> >     * backend - specifies domain where the backend is running;
> >     * beAlloc - indicated where display buffers should be allocated
> > (see Backend buffer allocation in [3]);
> 
> I don't understand that, I'm afraid.  I guess what I'm missing in this
> area is: the guest sees a virtual display device.  But how is this
> presented/accessed/named/whatever on the host ?  I would expect to see
> some configuraton for this in the libxl idl.
> 
> Thanks,
> Ian.
> 
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