linux-kernel - [Suggested-by:Shuah Khan Patch 1/1] cpufreq: amd-pstate: Add explanation for X86_AMD_PSTATE

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Date:   Thu, 1 Sep 2022 22:33:13 +0800
From:   Meng Li <li.meng@....com>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        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>,
        Meng Li <li.meng@....com>
Subject: [Suggested-by:Shuah Khan Patch 1/1] cpufreq: amd-pstate: Add explanation for X86_AMD_PSTATE_UT

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.

Signed-off-by: Meng Li <li.meng@....com>
---
 drivers/cpufreq/Kconfig.x86 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index fdd819069d72..fd1582716c58 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
@@ -58,6 +58,12 @@ 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.
+
 config X86_ACPI_CPUFREQ
 	tristate "ACPI Processor P-States driver"
 	depends on ACPI_PROCESSOR
-- 
2.34.1