On Tue, Jul 12, 2022 at 04:58:27PM +0200, Benjamin Tissoires wrote:

Hi,

and after a little bit of time, here comes the v6 of the HID-BPF series.

Again, for a full explanation of HID-BPF, please refer to the last patch
in this series (23/23).

This version sees some improvements compared to v5 on top of the
usual addressing of the previous comments:
- now I think every eBPF core change has a matching selftest added
- the kfuncs declared in syscall can now actually access the memory of
  the context
- the code to retrieve the BTF ID of the various HID hooks is much
  simpler (just a plain use of the BTF_ID() API instead of
  loading/unloading of a tracing program)
- I also added my HID Surface Dial example that I use locally to provide
  a fuller example to users

Looking great.
Before another respin to address bits in patch 12 let's land the first ~8 patches,
since they're generic useful improvements.

Kumar, could you please help review the verifier bits?