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Message-ID: <23414197-aa0b-a5fb-a818-35873f7b0482@linuxfoundation.org>
Date: Wed, 7 Sep 2022 15:38:14 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Meng Li <li.meng@....com>, Huang Rui <ray.huang@....com>,
linux-pm@...r.kernel.org
Cc: "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
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@...r.kernel.org,
Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [Suggested-by:Shuah Khan Patch V2 1/1] cpufreq: amd-pstate: Add
explanation for X86_AMD_PSTATE_UT
On 9/5/22 01:14, Meng Li wrote:
> This kernel module is used for testing. It's safe to say M here.
> It can also be built-in without X86_AMD_PSTATE enabled.
> Currently, only tests for amd-pstate are supported. If X86_AMD_PSTATE
> is set disabled, it can tell the users test can only run on amd-pstate
> driver, please set X86_AMD_PSTATE enabled.
> In the future, comparison tests will be added. It can set amd-pstate
> disabled and set acpi-cpufreq enabled to run test cases, then compare
> the test results.
>
> Signed-off-by: Meng Li <li.meng@....com>
> ---
> drivers/cpufreq/Kconfig.x86 | 12 +++++++-----
> tools/testing/selftests/amd-pstate/amd-pstate-ut.sh | 1 +
> 2 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
> index fd1582716c58..310779b07daf 100644
> --- a/drivers/cpufreq/Kconfig.x86
> +++ b/drivers/cpufreq/Kconfig.x86
> @@ -58,11 +58,13 @@ config X86_AMD_PSTATE_UT
> help
> This kernel module is used for testing. It's safe to say M here.
>
> - It can be modprobed even without amd-pstate module.
> - When the comparison test is performed, it can load other module
> - like acpi-cpufreq to test cases, then compare the test results.
> - When only the test for amd-pstate is performed, it can tell the
> - users they loaded a wrong module like acpi-cpufreq.
> + It can also be built-in without X86_AMD_PSTATE enabled.
> + Currently, only tests for amd-pstate are supported. If X86_AMD_PSTATE
> + is set disabled, it can tell the users test can only run on amd-pstate
> + driver, please set X86_AMD_PSTATE enabled.
> + In the future, comparison tests will be added. It can set amd-pstate
> + disabled and set acpi-cpufreq enabled to run test cases, then compare
> + the test results.
>
> config X86_ACPI_CPUFREQ
> tristate "ACPI Processor P-States driver"
> diff --git a/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh b/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
> index 273364650285..f8e82d91ffcf 100755
> --- a/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
> +++ b/tools/testing/selftests/amd-pstate/amd-pstate-ut.sh
> @@ -32,6 +32,7 @@ fi
> scaling_driver=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_driver)
> if [ "$scaling_driver" != "amd-pstate" ]; then
> echo "$0 # Skipped: Test can only run on amd-pstate driver."
> + echo "$0 # Please set X86_AMD_PSTATE enabled."
> echo "$0 # Current cpufreq scaling drvier is $scaling_driver."
> exit $ksft_skip
> fi
This patch doesn't apply on top of the previous patch series in
linux-kselftest next - please rebase and resend the patch.
thanks,
-- Shuah
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