From: Perry Yuan <perry.yuan@amd.com>
To: <rafael.j.wysocki@intel.com>, <Mario.Limonciello@amd.com>,
<viresh.kumar@linaro.org>, <gautham.shenoy@amd.com>,
<Borislav.Petkov@amd.com>, <Ray.Huang@amd.com>,
<Alexander.Deucher@amd.com>
Cc: <Xinmei.Huang@amd.com>, <oleksandr@natalenko.name>,
<Xiaojian.Du@amd.com>, <Li.Meng@amd.com>,
<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v7 5/6] Documentation: cpufreq: amd-pstate: introduce the new cpu boost control method
Date: Tue, 23 Apr 2024 16:40:58 +0800 [thread overview]
Message-ID: <3be5a8273d727b180b833ec01b785e394ac5d2fc.1713861200.git.perry.yuan@amd.com> (raw)
In-Reply-To: <cover.1713861200.git.perry.yuan@amd.com>
From: Perry Yuan <Perry.Yuan@amd.com>
Introduce AMD CPU frequency boosting control sysfs entry which used for
switching boost on and boost off.
If core performance boost is disabled while a core is in a boosted P-state,
the core automatically transitions to the highest performance non-boosted P-state
The highest perf and frequency will be limited by the setting value.
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
---
Documentation/admin-guide/pm/amd-pstate.rst | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst
index 1e0d101b020a..82fbd01da658 100644
--- a/Documentation/admin-guide/pm/amd-pstate.rst
+++ b/Documentation/admin-guide/pm/amd-pstate.rst
@@ -440,6 +440,17 @@ control its functionality at the system level. They are located in the
This attribute is read-only to check the state of preferred core set
by the kernel parameter.
+``cpb_boost``
+ Specifies whether core performance boost is requested to be enabled or disabled
+ If core performance boost is disabled while a core is in a boosted P-state, the
+ core automatically transitions to the highest performance non-boosted P-state.
+ AMD Core Performance Boost(CPB) is controlled by this new attribute file which
+ allow user to change all cores frequency boosting state. It supports both
+ ``active``, ``passive`` and ``guided`` mode control with below value write to it.
+
+ "0" Disable Core Performance Boosting
+ "1" Enable Core Performance Boosting
+
``cpupower`` tool support for ``amd-pstate``
===============================================
--
2.34.1
next prev parent reply other threads:[~2024-04-23 8:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 8:40 [PATCH v7 0/6] AMD Pstate Driver Core Performance Boost Perry Yuan
2024-04-23 8:40 ` [PATCH v7 1/6] cpufreq: acpi: move MSR_K7_HWCR_CPB_DIS_BIT into msr-index.h Perry Yuan
2024-04-23 10:40 ` Huang Rui
2024-04-23 8:40 ` [PATCH v7 2/6] cpufreq: amd-pstate: initialize new core precision boost state Perry Yuan
2024-04-23 10:51 ` Huang Rui
2024-04-23 8:40 ` [PATCH v7 3/6] cpufreq: amd-pstate: implement cpb_boost sysfs entry for boost control Perry Yuan
2024-04-23 11:00 ` Huang Rui
2024-04-26 6:40 ` Yuan, Perry
2024-04-25 21:17 ` Mario Limonciello
2024-04-26 6:39 ` Yuan, Perry
2024-04-23 8:40 ` [PATCH v7 4/6] cpufreq: amd-pstate: fix the MSR highest perf will be reset issue while cpb boost off Perry Yuan
2024-04-23 11:04 ` Huang Rui
2024-04-23 8:40 ` Perry Yuan [this message]
2024-04-23 8:40 ` [PATCH v7 6/6] cpufreq: amd-pstate-ut: support new cpb boost control interface Perry Yuan
2024-04-23 11:07 ` Huang Rui
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