[PATCH v3 0/5] cpupower: Add various feature control support for amd_pstate

[Wyes Karny]

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, make cpupower recognise amd-pstate-epp driver.

Changelog:
v2->v3:
- Use common prefix to recognise amd-pstate-epp driver.
- Picked up review tag from Mario.

v1->v2:
- Drop patch 1, which was amd-pstate-epp driver rename change.
- Picked ACKs from Ray.

Wyes Karny (5):
  cpupower: Recognise amd-pstate active mode driver
  cpupower: Add is_valid_path API
  cpupower: Add EPP value change support
  cpupower: Add support for amd_pstate mode change
  cpupower: Add turbo-boost support in cpupower

 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 ++++++++++++++++-
 5 files changed, 138 insertions(+), 3 deletions(-)

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2.34.1