Re: [Xen-devel] Xen Community Call on new PV protocols, Tuesday 10th Jan 9AM PST

["al1img ." <al1img@xxxxxxxxx>]

Hi All,

The library for userspace backends is under development now. It is not ready to be published yet.

But you can check how it looks like at my github repository [1].

There are also sound and display backends based on this library [2], [3].

Comments are welcome.

Thanks.

[1] https://github.com/al1img/libxenbe
[2] https://github.com/al1img/displ_be
[3] https://github.com/al1img/snd_be
 

2017-01-10 21:29 GMT+02:00 Stefano Stabellini <sstabellini@xxxxxxxxxx>:

These are the minutes I took during the call:

Xen PV Drivers Lifecycle document ready to be committed.

Common Pitfalls for new PV protocols:
- 32 vs 64 fields
- not Linux centric
- missing version fields and feature flags

Full list of outstanding PV protocols:
pvcalls, xen-9pfs, multitouch events, sound, display, netfront/netback extension

PVCalls: should be OK to move forward, Konrad will review next
Sound: should be OK to move forward, Konrad will review next
Display: concerns about whether it will replace xenfb. Konrad will take
a look after
Multitouch: new, but simple, Stefano will review
Netfront/netback extension: new, still many comments outstanding,
probably not for the next release

Things to do
- use pahole 32 bit and 64 bit to check the structs, publish the output
  on xendevel
- use version field and feature flags on xenstore
- write new PV protocols guideline doc to explain common pitfalls and
  versioning to newcomers
- write a README in docs/misc with the state of new PV protocols when
  they are checked in
- Oleksandr will publish a library for userspace backends in C++ to xenbits

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--

Best Regards,
Oleksandr Grytsov.

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