linux-kernel - [PATCH V3 7/7] Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options

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Date:   Thu, 24 Aug 2023 10:12:49 +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>, Meng Li <li.meng@....com>
Subject: [PATCH V3 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 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>
---
 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 23ebe34ff901..4f78067bb8af 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