Re: [Xen-devel] PV audio drivers for Linux

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

On 01/18/2017 06:31 AM, Ughreja, Rakesh A wrote:
> > -----Original Message-----
> > From: Stefano Stabellini [mailto:sstabellini@xxxxxxxxxx]
> > Sent: Wednesday, January 18, 2017 5:41 AM
> > To: Ughreja, Rakesh A <rakesh.a.ughreja@xxxxxxxxx>
> > Cc: xen-devel@xxxxxxxxxxxxx; Oleksandr_Andrushchenko@xxxxxxxx;
> > Oleksandr_Grytsov@xxxxxxxx; oleksandr.dmytryshyn@xxxxxxxxxxxxxxx;
> > iurii.konovalenko@xxxxxxxxxxxxxxx; konrad.wilk@xxxxxxxxxx
> > Subject: Re: [Xen-devel] PV audio drivers for Linux
> >
> > On Tue, 17 Jan 2017, Ughreja, Rakesh A wrote:
> > > Hi,
> > >
> > > I am trying to develop PV audio drivers and facing one issue to
> > > achieve zero copy of the buffers between Front End (DOM1) and
> > > Back End (DOM0) drivers.
> > You might want to take a look at the existing PV sound proposal:
> >
> > http://marc.info/?l=xen-devel&m=148094319010445
> Sure, let me look into this.
> Thank you very much for the quick reply and the reference.
And here we are working on sound, display (DRM), multi-touch
PV frontends [1], generic backend user-space library [2]
and the corresponding user-space backends [3], [4].
Please take a look at the Dom0 zero-copy driver for DRM [5]

Please note, that we haven't considered zero-copy for sound
(ALSA) yet, but for DRM only.

[1] https://github.com/andr2000/linux/tree/xen-pv-devel-4.10-rc2
[2] https://github.com/al1img/libxenbe
[3] https://github.com/al1img/displ_be
[4] https://github.com/al1img/snd_be
[5] 
https://github.com/andr2000/linux/blob/xen-pv-devel-4.10-rc2/drivers/gpu/drm/xen/xen_drm_zcopy.c
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