linux-kernel - [PATCH 0/6] cpupower: Add various feature control support for amd

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Message-ID: <20230612113615.205353-1-wyes.karny@amd.com>
Date:   Mon, 12 Jun 2023 11:36:09 +0000
From:   Wyes Karny <wyes.karny@....com>
To:     <rafael@...nel.org>, <ray.huang@....com>,
        <viresh.kumar@...aro.org>, <trenn@...e.com>, <shuah@...nel.org>
CC:     <gautham.shenoy@....com>, <Mario.Limonciello@....com>,
        <Perry.Yuan@....com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Wyes Karny <wyes.karny@....com>
Subject: [PATCH 0/6] cpupower: Add various feature control support for amd_pstate

In this series, three feature control support for amd_pstate has been
added.

 1. EPP: User can control Energy Performance Preference (EPP) value,
which conveys user's performance vs energy preference to platform. This
feature is present on amd_pstate and intel_pstate active mode.

 2. amd_pstate mode switch: amd_pstate has various working modes such as
'active', 'passive' and 'guided', which can be changed dynamically. 

 3. Turbo boost: Turbo boost feature is present in amd_pstate as well as
acpi-cpufreq. By default this is enabled, but user can control this
feature dynamically.

These features can be controlled with `cpupower set` command. The
options are respectively --epp, --amd-pstate-mode, --turbo-boost

Also, fix amd-pstate-epp driver name and make cpupower recognise
amd-pstate-epp driver.

Wyes Karny (6):
  amd-pstate: Make amd-pstate epp driver name hyphenated
  cpupower: Recognise amd-pstate active mode driver
  cpupower: Add is_sysfs_present API
  cpupower: Add EPP value change support
  cpupower: Add support for amd_pstate mode change
  cpupower: Add turbo-boost support in cpupower

 drivers/cpufreq/amd-pstate.c                 |  2 +-
 tools/power/cpupower/lib/cpupower.c          |  7 +++
 tools/power/cpupower/lib/cpupower_intern.h   |  1 +
 tools/power/cpupower/utils/cpupower-set.c    | 65 +++++++++++++++++++-
 tools/power/cpupower/utils/helpers/helpers.h | 11 ++++
 tools/power/cpupower/utils/helpers/misc.c    | 57 ++++++++++++++++-
 6 files changed, 139 insertions(+), 4 deletions(-)

-- 
2.34.1