[bpf-next,v9,00/23] Introduce eBPF support for HID devices

Hi,

here comes the v9 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 minor improvements compared to v7 and v8, only
focusing on the reviews I got. (v8 was a single patch update)

- patch 1/24 in v7 was dropped as it is already fixed upstream
- patch 1/23 in v9 is now capable of handling all functions, not just
  kfuncs (tested with the selftests only)
- some minor nits from Greg's review
- a rebase on top of the current bpf-next tree as the kfunc definition
  changed (for the better).

Cheers,
Benjamin


Benjamin Tissoires (23):
  bpf/verifier: allow all functions to read user provided context
  bpf/verifier: do not clear meta in check_mem_size
  selftests/bpf: add test for accessing ctx from syscall program type
  bpf/verifier: allow kfunc to return an allocated mem
  selftests/bpf: Add tests for kfunc returning a memory pointer
  bpf: prepare for more bpf syscall to be used from kernel and user
    space.
  libbpf: add map_get_fd_by_id and map_delete_elem in light skeleton
  HID: core: store the unique system identifier in hid_device
  HID: export hid_report_type to uapi
  HID: convert defines of HID class requests into a proper enum
  HID: Kconfig: split HID support and hid-core compilation
  HID: initial BPF implementation
  selftests/bpf: add tests for the HID-bpf initial implementation
  HID: bpf: allocate data memory for device_event BPF programs
  selftests/bpf/hid: add test to change the report size
  HID: bpf: introduce hid_hw_request()
  selftests/bpf: add tests for bpf_hid_hw_request
  HID: bpf: allow to change the report descriptor
  selftests/bpf: add report descriptor fixup tests
  selftests/bpf: Add a test for BPF_F_INSERT_HEAD
  samples/bpf: HID: add new hid_mouse example
  samples/bpf: HID: add Surface Dial example
  Documentation: add HID-BPF docs

 Documentation/hid/hid-bpf.rst                 | 512 +++++++++
 Documentation/hid/index.rst                   |   1 +
 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 |  66 ++
 .../hid/bpf/entrypoints/entrypoints.lskel.h   | 682 ++++++++++++
 drivers/hid/bpf/hid_bpf_dispatch.c            | 526 ++++++++++
 drivers/hid/bpf/hid_bpf_dispatch.h            |  28 +
 drivers/hid/bpf/hid_bpf_jmp_table.c           | 577 ++++++++++
 drivers/hid/hid-core.c                        |  49 +-
 include/linux/bpf.h                           |   9 +-
 include/linux/btf.h                           |  10 +
 include/linux/hid.h                           |  38 +-
 include/linux/hid_bpf.h                       | 148 +++
 include/uapi/linux/hid.h                      |  26 +-
 include/uapi/linux/hid_bpf.h                  |  25 +
 kernel/bpf/btf.c                              | 109 +-
 kernel/bpf/syscall.c                          |  10 +-
 kernel/bpf/verifier.c                         |  64 +-
 net/bpf/test_run.c                            |  21 +
 samples/bpf/.gitignore                        |   2 +
 samples/bpf/Makefile                          |  27 +
 samples/bpf/hid_mouse.bpf.c                   | 134 +++
 samples/bpf/hid_mouse.c                       | 161 +++
 samples/bpf/hid_surface_dial.bpf.c            | 161 +++
 samples/bpf/hid_surface_dial.c                | 232 ++++
 tools/include/uapi/linux/hid.h                |  62 ++
 tools/include/uapi/linux/hid_bpf.h            |  25 +
 tools/lib/bpf/skel_internal.h                 |  23 +
 tools/testing/selftests/bpf/Makefile          |   5 +-
 tools/testing/selftests/bpf/config            |   3 +
 tools/testing/selftests/bpf/prog_tests/hid.c  | 990 ++++++++++++++++++
 .../selftests/bpf/prog_tests/kfunc_call.c     |  76 ++
 tools/testing/selftests/bpf/progs/hid.c       | 206 ++++
 .../selftests/bpf/progs/kfunc_call_test.c     | 125 +++
 40 files changed, 5198 insertions(+), 84 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/bpf/hid_mouse.bpf.c
 create mode 100644 samples/bpf/hid_mouse.c
 create mode 100644 samples/bpf/hid_surface_dial.bpf.c
 create mode 100644 samples/bpf/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/bpf/prog_tests/hid.c
 create mode 100644 tools/testing/selftests/bpf/progs/hid.c