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From: Perry Yuan <perry.yuan@amd.com>
To: <rafael.j.wysocki@intel.com>, <Mario.Limonciello@amd.com>,
	<viresh.kumar@linaro.org>, <Ray.Huang@amd.com>, <gautham.shenoy@amd.com>,
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	<Xiaojian.Du@amd.com>, <Li.Meng@amd.com>, <linux-pm@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH v3 5/7] Documentation: cpufreq: amd-pstate: introduce the new cpu boost control method
Date: Wed, 7 Feb 2024 17:21:56 +0800
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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 0a3aa6b8ffd5..fcf5b75a5341 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