kernel/tools/power/cpupower/utils/helpers, branch linux-rolling-stable

cpupower: Allow control of boost feature on non-x86 based systems with boost support.

2025-08-15T16:49:14Z

The cpufreq subsystem has a generic sysfs interface for controlling boost (/sys/devices/system/cpu/cpufreq/boost). The sysfs interface can be used to enable boost control from the cpupower command on non-x86 platforms as well. So, allow boost controlling on non-x86 system if boost sysfs file exists. The set subcommand enables/disables the boost feature using the following syntax: cpupower set --boost 1 cpupower set --boost 0 The --boost option is an alias for --turbo-boost. We provided the neutral option name because the name "turbo boost" is specific to Intel technology. The frequency-info subcommand displays the enabled/disabled state of the boost feature as follows: boost state support: Active: yes (or no) Link: https://lore.kernel.org/r/20250522061122.2149188-3-fj5851bi@fujitsu.com Signed-off-by: Shinji Nomoto Signed-off-by: Shuah Khan

cpupower: Adjust whitespace for amd-pstate specific prints

2024-12-20T16:12:07Z

The amd-pstate section is grouped under boost, which isn't appropriate. Adjust the indentation so that it is it's own section. Link: https://lore.kernel.org/r/20241218191144.3440854-8-superm1@kernel.org Signed-off-by: Mario Limonciello Signed-off-by: Shuah Khan

cpupower: Add support for amd-pstate preferred core rankings

2024-12-20T16:12:07Z

The rankings are useful information to determine if the scheduler is placing tasks appropriately for the hardware. Link: https://lore.kernel.org/r/20241218191144.3440854-4-superm1@kernel.org Signed-off-by: Mario Limonciello Signed-off-by: Shuah Khan

tools/power/cpupower: Fix Pstate frequency reporting on AMD Family 1Ah CPUs

2024-05-28T15:22:57Z

Update cpupower's P-State frequency calculation and reporting with AMD Family 1Ah+ processors, when using the acpi-cpufreq driver. This is due to a change in the PStateDef MSR layout in AMD Family 1Ah+. Tested on 4th and 5th Gen AMD EPYC system Signed-off-by: Ananth Narayan Signed-off-by: Dhananjay Ugwekar Reviewed-by: Mario Limonciello Signed-off-by: Shuah Khan

cpupower: Add turbo-boost support in cpupower

2023-07-18T22:07:01Z

If boost sysfs (/sys/devices/system/cpu/cpufreq/boost) file is present turbo-boost is feature is supported in the hardware. By default this feature should be enabled. But to disable/enable it write to the sysfs file. Use the same to control this feature via cpupower. To enable: cpupower set --turbo-boost 1 To disable: cpupower set --turbo-boost 0 Acked-by: Huang Rui Reviewed-by: Gautham R. Shenoy Reviewed-by: Mario Limonciello Signed-off-by: Wyes Karny Tested-by: Perry Yuan Signed-off-by: Shuah Khan

cpupower: Add support for amd_pstate mode change

2023-07-18T22:06:56Z

amd_pstate supports changing of its mode dynamically via `status` sysfs file. Add the same capability in cpupower. To change the mode to active mode use below command: cpupower set --amd-pstate-mode active Acked-by: Huang Rui Reviewed-by: Gautham R. Shenoy Reviewed-by: Mario Limonciello Signed-off-by: Wyes Karny Tested-by: Perry Yuan Signed-off-by: Shuah Khan

cpupower: Add EPP value change support

2023-07-18T22:06:49Z

amd_pstate and intel_pstate active mode drivers support energy performance preference feature. Through this user can convey it's energy/performance preference to platform. Add this value change capability to cpupower. To change the EPP value use below command: cpupower set --epp performance Reviewed-by: Mario Limonciello Signed-off-by: Wyes Karny Tested-by: Perry Yuan Acked-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Recognise amd-pstate active mode driver

2023-07-18T22:06:36Z

amd-pstate active mode driver name is "amd-pstate-epp". Use common prefix for string matching condition to recognise amd-pstate active mode driver. Reviewed-by: Gautham R. Shenoy Signed-off-by: Wyes Karny Reviewed-by: Mario Limonciello Tested-by: Perry Yuan Acked-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Add function to print AMD P-State performance capabilities

2022-02-23T01:37:12Z

AMD P-State kernel module is using the fine grain frequency instead of acpi hardware pstate. So add a function to print performance and frequency values. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan

cpupower: Move print_speed function into misc helper

2022-02-23T01:37:07Z

The print_speed can be as a common function, and expose it into misc helper header. Then it can be used on other helper files as well. Reviewed-by: Shuah Khan Signed-off-by: Huang Rui Signed-off-by: Shuah Khan