linux-kernel - [PATCH V9 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options

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Message-ID: <20231013025741.3332520-8-li.meng@amd.com>
Date:   Fri, 13 Oct 2023 10:57:41 +0800
From:   Meng Li <li.meng@....com>
To:     "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Huang Rui <ray.huang@....com>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <x86@...nel.org>, <linux-acpi@...r.kernel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        <linux-kselftest@...r.kernel.org>,
        "Nathan Fontenot" <nathan.fontenot@....com>,
        Deepak Sharma <deepak.sharma@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Shimmer Huang <shimmer.huang@....com>,
        "Perry Yuan" <Perry.Yuan@....com>,
        Xiaojian Du <Xiaojian.Du@....com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Borislav Petkov <bp@...en8.de>,
        "Oleksandr Natalenko" <oleksandr@...alenko.name>,
        Meng Li <li.meng@....com>, Wyes Karny <wyes.karny@....com>
Subject: [PATCH V9 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options

amd-pstate driver support enable/disable preferred core.
Default enabled on platforms supporting amd-pstate preferred core.
Disable amd-pstate preferred core with
"amd_prefcore=disable" added to the kernel command line.

Signed-off-by: Meng Li <li.meng@....com>
Reviewed-by: Mario Limonciello <mario.limonciello@....com>
Reviewed-by: Wyes Karny <wyes.karny@....com>
Reviewed-by: Huang Rui <ray.huang@....com>
Tested-by: Oleksandr Natalenko <oleksandr@...alenko.name>
---
 Documentation/admin-guide/kernel-parameters.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0a1731a0f0ef..e35b795aa8aa 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -363,6 +363,11 @@
 			  selects a performance level in this range and appropriate
 			  to the current workload.
 
+	amd_prefcore=
+			[X86]
+			disable
+			  Disable amd-pstate preferred core.
+
 	amijoy.map=	[HW,JOY] Amiga joystick support
 			Map of devices attached to JOY0DAT and JOY1DAT
 			Format: <a>,<b>
-- 
2.34.1