linux-kernel - [PATCH v1 0/9] Move RAPL defaults to interface drivers

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Message-ID: <20260129183646.558866-1-sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Thu, 29 Jan 2026 10:36:37 -0800
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: "Rafael J . Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: Zhang Rui <rui.zhang@...el.com>,
	Lukasz Luba <lukasz.luba@....com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/9] Move RAPL defaults to interface drivers

Hi All,

The Intel RAPL common driver has accumulated a significant amount of
interface-specific logic over time. There is very little common code
shared across the MSR, TPMI, and MMIO interface-specific defaults.
Keeping these interface-specific defaults in the common layer therefore
provides no real benefit and instead increases complexity and
maintenance burden.

As a first step toward cleaning this up, this series moves
rapl_defaults ownership from the common driver into the individual
interface drivers and allows each interface to provide its own defaults
directly. Additional interface-specific cleanups in the RAPL common
driver will be addressed in follow-up work. This series is a
continuation of the earlier cleanup and refactoring effort initiated
by Zhang Rui.

Patch Summary:

Patch 1-4/9: Preparatory patches that do code cleanups in intel_rapl_common
             driver.
Patch 5/9: Preparatory patch that renames/declares the common functions.
Patch 6/9: Move TPMI default settings from the common driver into the
           TPMI interface driver.

Patch 7/9: Move MMIO default settings from the common driver into the
           MMIO interface driver.

Patch 8/9: Register the PM notifier only when a RAPL package exists.

Patch 9/9: Move MSR default settings from the common driver into the MSR
           interface driver.

No functional changes are intended across the series. This is strictly a
structural refactoring to simplify the common RAPL code and prepare it
for further cleanups.

Kuppuswamy Sathyanarayanan (9):
  powercap: intel_rapl: Add a symbol namespace for intel_rapl exports
  powercap: intel_rapl: Cleanup coding style
  powercap: intel_rapl: Use GENMASK() and BIT() macros
  powercap: intel_rapl: Use unit conversion macros from units.h
  powercap: intel_rapl: Allow interface drivers to configure
    rapl_defaults
  powercap: intel_rapl: Move TPMI default settings into TPMI interface
    driver
  thermal: intel: int340x: processor: Move RAPL defaults to MMIO driver
  powercap: intel_rapl: Register PM notifier only when RAPL package
    exists
  powercap: intel_rapl: Move MSR default settings into MSR interface
    driver

 drivers/powercap/intel_rapl_common.c          | 755 ++++++------------
 drivers/powercap/intel_rapl_msr.c             | 251 +++++-
 drivers/powercap/intel_rapl_tpmi.c            |  48 ++
 .../int340x_thermal/processor_thermal_rapl.c  |   9 +
 include/linux/intel_rapl.h                    |  17 +-
 include/linux/units.h                         |   3 +
 6 files changed, 561 insertions(+), 522 deletions(-)

-- 
2.43.0