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

[Oleksandr Grytsov <al1img@xxxxxxxxx>]

On Wed, Apr 5, 2017 at 5:00 PM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> 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.
>

I guess it is late to combine the patches as the protocol already acked.

>> 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.
>>

The display backend is a user-space application which is DRM or Wayland client.
Generally it can be run on any domain.


>> Thanks,
>> Ian.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxx
>> https://lists.xen.org/xen-devel

-- 
Best Regards,
Oleksandr Grytsov.

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