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Date: Fri, 4 Nov 2022 13:41:41 +0200
From: Tero Kristo <tero.kristo@...ux.intel.com>
To: Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Greg KH <gregkh@...uxfoundation.org>,
Jiri Kosina <jikos@...nel.org>,
Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-doc@...r.kernel.org
Subject: Re: [PATCH hid v11 00/14] Introduce eBPF support for HID devices
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@...ux.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
>
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