[0/6] cpupower: Add various feature control support for amd_pstate

Message

Wyes Karny June 12, 2023, 11:36 a.m. UTC

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(-)