linux-kernel - [PATCH V13 7/7] Documentation: introduce amd-pstate preferrd core mode kernel command line options

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Message-ID: <20240112092531.789841-8-li.meng@amd.com>
Date: Fri, 12 Jan 2024 17:25:31 +0800
From: Meng Li <li.meng@....com>
To: "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>, Borislav Petkov
	<bpetkov@....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>, Perry Yuan <perry.yuan@....com>
Subject: [PATCH V13 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>
Reviewed-by: Perry Yuan <perry.yuan@....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 65731b060e3f..cbfa63a87e4a 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