[alsa-devel] Para-virtualized audio drivers

[Takashi Iwai]

On Thu, 20 Oct 2016 19:02:42 +0200,
Ughreja, Rakesh A wrote:
> 
> >>
> >> I am thinking to develop pv-audio-frontend (running on Dom1) and
> >> pv-audio-backend (running on Dom0) drivers all at kernel level.
> >> Backend driver owns the hardware. Frontend driver communicates with
> >> backend driver using XENbus framework just like storage and network PV
> >> drivers.
> >>
> >> Before I start, I wanted to check if there is any other
> >> work that has been done which I can take as base ?
> >
> >I don't know of any other existing implementation for Xen.  The
> >question would be rather how you would implement the backend.
> >
> 
> My thinking is to have backend driver at kernel level. The backend
> driver would receive requests from frontend driver. I agree that the
> previous effort was to develop it in user space.
> 
> >Is it about Intel hardware as Liam has been working on?  Or is it
> 
> Liam's work is different.
> 
> >targeted as a generic Xen stuff like the patches you mentioned in the
> >above?  The patchset above was about the user-space backend, IIRC.
> >
> 
> I am trying to develop generic PV audio drivers for XEN. I see people 
> have developed PV Storage and Network drivers in XEN and they
> are up-streamed. So I was thinking to do that for audio as well.
> 
> Do you recall why the above patchset was not merged ?
> any limitations or was it incomplete ? 

I don't remember it well.  I guess I wasn't involved with that
discussion since I was off when it was posted or so.  Since then there
was little attention gathered, unfortunately.


Takashi