linux-kernel - Re: [PATCH v2 0/3] Add unit test module for AMD P-State driver

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Date:   Wed, 13 Apr 2022 17:41:44 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Meng Li <li.meng@....com>
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Huang Rui <ray.huang@....com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Nathan Fontenot <nathan.fontenot@....com>,
        Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Jinzhou Su <Jinzhou.Su@....com>,
        Perry Yuan <Perry.Yuan@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Borislav Petkov <bp@...en8.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/3] Add unit test module for AMD P-State driver

On Wed, Apr 13, 2022 at 11:06 AM Meng Li <li.meng@....com> wrote:
>
> Hi all:
>
> AMD P-State unit test(amd_pstate_testmod) is a kernel module for testing
> the functions of amd-pstate driver.
> It could import as a module to launch some test tasks.
>
> We upstream out AMD P-state driver into Linux kernel and use this unit
> test module to verify the required conditions and basic functions of
> amd-pstate before integration test.
>
> We use test module in the kselftest frameworks to implement it.
> We create amd_pstate_testmod module and tie it into kselftest.
>
> For exmaple: The test case aput_acpi_cpc is used to check whether the
> _CPC object is exist in SBIOS.
> The amd-pstate initialization will fail if the _CPC in ACPI SBIOS is
> not existed at the detected processor, so it is a necessary condition.
>
> At present, its test cases are very simple, and the corresponding test
> cases will continue to be added later to improve the test coverage.
>
> See patch series in below git repo:
> V1: https://lore.kernel.org/linux-pm/20220323071502.2674156-1-li.meng@amd.com/
>
> Changes from V1 -> V2:
> - cpufreq: amd-pstate:
> - - add a trailing of amd-pstate.h to MAINTAINER AMD PSTATE DRIVER
> - selftests: cpufreq
> - - add a wrapper shell script for the amd_pstate_testmod module
> - selftests: cpufreq:
> - - remove amd_pstate_testmod kernel module to .../cpufreq/amd_pstate_testmod
> - Documentation: amd-pstate:
> - - amd_pstate_testmod rst document is not provided at present.
>
> Thanks,
> Jasmine
>
> Meng Li (3):
>   cpufreq: amd-pstate: Expose struct amd_cpudata

Please collect an ACK from Ray for this one as per MAINTAINERS and I
will leave the series to Shuah as it is selftests mostly.

Thanks!

>   selftests: cpufreq: Add wapper script for test AMD P-State
>   selftests: cpufreq: Add amd_pstate_testmod kernel module for testing
>
>  MAINTAINERS                                   |   1 +
>  drivers/cpufreq/amd-pstate.c                  |  60 +---
>  include/linux/amd-pstate.h                    |  74 +++++
>  tools/testing/selftests/cpufreq/Makefile      |   2 +-
>  .../selftests/cpufreq/amd_pstate_testmod.sh   |   4 +
>  .../cpufreq/amd_pstate_testmod/Makefile       |  20 ++
>  .../amd_pstate_testmod/amd_pstate_testmod.c   | 302 ++++++++++++++++++
>  tools/testing/selftests/cpufreq/config        |   1 +
>  8 files changed, 404 insertions(+), 60 deletions(-)
>  create mode 100644 include/linux/amd-pstate.h
>  create mode 100755 tools/testing/selftests/cpufreq/amd_pstate_testmod.sh
>  create mode 100644 tools/testing/selftests/cpufreq/amd_pstate_testmod/Makefile
>  create mode 100644 tools/testing/selftests/cpufreq/amd_pstate_testmod/amd_pstate_testmod.c
>
> --
> 2.25.1
>