Re: [PATCH hid v11 00/14] Introduce eBPF support for HID devices

[Tero Kristo <tero.kristo@linux.intel.com>]

Hi Benjamin,

Tested this on top of 6.1-rc1 against my HID-USI work, appears to be 
good. Also tried out the HID selftests, and they pass, so for the whole 
series:

Tested-by: Tero Kristo <tero.kristo@linux.intel.com>

On 25/10/2022 12:34, Benjamin Tissoires wrote:
> Hi,
>
> and here comes the v11 of the HID-BPF series.
>
> Again, for a full explanation of HID-BPF, please refer to the last patch
> in this series (14/14).
>
> Now that the bpf-core changes are all merged in v6.1, it is
> time to have that series entirely relying on HID, so it can get
> merged into the HID tree.
>
> Compared to v10, the most notable change is in the selftests and the
> samples: they are now namespaced into hid, not bpf.
>
> This means that HID-BPF has no more conflicts with the bpf tree.
>
> One other interesting change is in patch 4/14. I managed to reduce
> the scope of the embedded bpf programs, by tricking the refcount.
> I am planning on submitting an RFC for embedding those changes in
> bpf core (a map that doesn't increment refcount and a cleanup mechanism)
> but this can come as a later improvement.
> This new kind of maps and mechanisms might also be useful for other
> subsystems.
>
> Cheers,
> Benjamin
>
> Benjamin Tissoires (14):
>    HID: Kconfig: split HID support and hid-core compilation
>    HID: initial BPF implementation
>    selftests: add tests for the HID-bpf initial implementation
>    HID: bpf jmp table: simplify the logic of cleaning up programs
>    HID: bpf: allocate data memory for device_event BPF programs
>    selftests/hid: add test to change the report size
>    HID: bpf: introduce hid_hw_request()
>    selftests/hid: add tests for bpf_hid_hw_request
>    HID: bpf: allow to change the report descriptor
>    selftests/hid: add report descriptor fixup tests
>    selftests/hid: Add a test for BPF_F_INSERT_HEAD
>    samples/hid: add new hid BPF example
>    samples/hid: add Surface Dial example
>    Documentation: add HID-BPF docs
>
>   Documentation/hid/hid-bpf.rst                 | 513 +++++++++++
>   Documentation/hid/index.rst                   |   1 +
>   MAINTAINERS                                   |   3 +
>   drivers/Makefile                              |   2 +-
>   drivers/hid/Kconfig                           |  20 +-
>   drivers/hid/Makefile                          |   2 +
>   drivers/hid/bpf/Kconfig                       |  17 +
>   drivers/hid/bpf/Makefile                      |  11 +
>   drivers/hid/bpf/entrypoints/Makefile          |  93 ++
>   drivers/hid/bpf/entrypoints/README            |   4 +
>   drivers/hid/bpf/entrypoints/entrypoints.bpf.c |  34 +
>   .../hid/bpf/entrypoints/entrypoints.lskel.h   | 368 ++++++++
>   drivers/hid/bpf/hid_bpf_dispatch.c            | 526 +++++++++++
>   drivers/hid/bpf/hid_bpf_dispatch.h            |  28 +
>   drivers/hid/bpf/hid_bpf_jmp_table.c           | 572 ++++++++++++
>   drivers/hid/hid-core.c                        |  32 +-
>   include/linux/hid.h                           |   5 +
>   include/linux/hid_bpf.h                       | 148 +++
>   include/uapi/linux/hid_bpf.h                  |  25 +
>   samples/hid/.gitignore                        |   8 +
>   samples/hid/Makefile                          | 246 +++++
>   samples/hid/Makefile.target                   |  75 ++
>   samples/hid/hid_mouse.bpf.c                   | 134 +++
>   samples/hid/hid_mouse.c                       | 160 ++++
>   samples/hid/hid_surface_dial.bpf.c            | 161 ++++
>   samples/hid/hid_surface_dial.c                | 231 +++++
>   tools/include/uapi/linux/hid.h                |  62 ++
>   tools/include/uapi/linux/hid_bpf.h            |  25 +
>   tools/testing/selftests/Makefile              |   1 +
>   tools/testing/selftests/hid/.gitignore        |   4 +
>   tools/testing/selftests/hid/Makefile          | 242 +++++
>   tools/testing/selftests/hid/config            |  20 +
>   tools/testing/selftests/hid/hid_bpf.c         | 846 ++++++++++++++++++
>   tools/testing/selftests/hid/progs/hid.c       | 206 +++++
>   34 files changed, 4815 insertions(+), 10 deletions(-)
>   create mode 100644 Documentation/hid/hid-bpf.rst
>   create mode 100644 drivers/hid/bpf/Kconfig
>   create mode 100644 drivers/hid/bpf/Makefile
>   create mode 100644 drivers/hid/bpf/entrypoints/Makefile
>   create mode 100644 drivers/hid/bpf/entrypoints/README
>   create mode 100644 drivers/hid/bpf/entrypoints/entrypoints.bpf.c
>   create mode 100644 drivers/hid/bpf/entrypoints/entrypoints.lskel.h
>   create mode 100644 drivers/hid/bpf/hid_bpf_dispatch.c
>   create mode 100644 drivers/hid/bpf/hid_bpf_dispatch.h
>   create mode 100644 drivers/hid/bpf/hid_bpf_jmp_table.c
>   create mode 100644 include/linux/hid_bpf.h
>   create mode 100644 include/uapi/linux/hid_bpf.h
>   create mode 100644 samples/hid/.gitignore
>   create mode 100644 samples/hid/Makefile
>   create mode 100644 samples/hid/Makefile.target
>   create mode 100644 samples/hid/hid_mouse.bpf.c
>   create mode 100644 samples/hid/hid_mouse.c
>   create mode 100644 samples/hid/hid_surface_dial.bpf.c
>   create mode 100644 samples/hid/hid_surface_dial.c
>   create mode 100644 tools/include/uapi/linux/hid.h
>   create mode 100644 tools/include/uapi/linux/hid_bpf.h
>   create mode 100644 tools/testing/selftests/hid/.gitignore
>   create mode 100644 tools/testing/selftests/hid/Makefile
>   create mode 100644 tools/testing/selftests/hid/config
>   create mode 100644 tools/testing/selftests/hid/hid_bpf.c
>   create mode 100644 tools/testing/selftests/hid/progs/hid.c
>