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From: Perry Yuan <perry.yuan@amd.com>
To: <rafael.j.wysocki@intel.com>, <Mario.Limonciello@amd.com>,
	<Borislav.Petkov@amd.com>, <gautham.shenoy@amd.com>,
	<viresh.kumar@linaro.org>, <Ray.Huang@amd.com>
Cc: <Alexander.Deucher@amd.com>, <Xinmei.Huang@amd.com>,
	<Xiaojian.Du@amd.com>, <Perry.Yuan@amd.com>, <Li.Meng@amd.com>,
	<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v9 5/7] Documentation: cpufreq: amd-pstate: introduce the new cpu boost control method
Date: Mon, 6 May 2024 18:19:57 +0800	[thread overview]
Message-ID: <cc1237a30eecc223f6a7603b456486b253d10d3b.1714989803.git.perry.yuan@amd.com> (raw)
In-Reply-To: <cover.1714989803.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 | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst
index 1e0d101b020a..bcc0d9404c18 100644
--- a/Documentation/admin-guide/pm/amd-pstate.rst
+++ b/Documentation/admin-guide/pm/amd-pstate.rst
@@ -440,6 +440,16 @@ 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 attribute file which allows
+        user to change all cores frequency boosting state. It supports all amd-pstate modes.
+
+        "0" Disable Core Performance Boosting
+        "1" Enable  Core Performance Boosting
+
 ``cpupower`` tool support for ``amd-pstate``
 ===============================================
 
-- 
2.34.1


  parent reply	other threads:[~2024-05-06 10:20 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-06 10:19 [PATCH v9 0/7] AMD Pstate Driver Core Performance Boost Perry Yuan
2024-05-06 10:19 ` [PATCH v9 1/7] cpufreq: acpi: move MSR_K7_HWCR_CPB_DIS_BIT into msr-index.h Perry Yuan
2024-05-06 10:19 ` [PATCH v9 2/7] cpufreq: amd-pstate: initialize new core precision boost state Perry Yuan
2024-05-06 10:19 ` [PATCH v9 3/7] cpufreq: amd-pstate: implement cpb_boost sysfs entry for boost control Perry Yuan
2024-05-06 13:27   ` Limonciello, Mario
2024-05-06 15:01     ` Yuan, Perry
2024-05-06 10:19 ` [PATCH v9 4/7] cpufreq: amd-pstate: fix the MSR highest perf will be reset issue while cpb boost off Perry Yuan
2024-05-06 10:19 ` Perry Yuan [this message]
2024-05-06 10:19 ` [PATCH v9 6/7] cpufreq: amd-pstate: introduce per CPU frequency boost control Perry Yuan
2024-05-06 13:29   ` Limonciello, Mario
2024-05-06 10:19 ` [PATCH v9 7/7] Documentation: cpufreq: amd-pstate: update doc for Per CPU boost control method Perry Yuan

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