linux-kernel - [PATCH v1 0/2] Add MSR-based RAPL PMU support

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Message-ID: <20251121000539.386069-1-sathyanarayanan.kuppuswamy@linux.intel.com>
Date: Thu, 20 Nov 2025 16:05:37 -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>,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/2] Add MSR-based RAPL PMU support

This patch series enables MSR-based PMU support for the Intel RAPL
driver in the Linux powercap subsystem.

Following are the patch details:

Patch 1/2 - Preparatory patch that updates the read_raw() interface
            to allow atomic-context callers.

Patch 2/2 - More details about motivation of this series and adds
            MSR-based RAPL PMU access support.

This series has been tested and verified in the Panther Lake and
Wildcat Lake platforms using perf tool.

Please let me know your review comments.

Kuppuswamy Sathyanarayanan (2):
  powercap: intel_rapl: Prepare read_raw interface for atomic-context
    callers
  powercap: intel_rapl: Enable MSR-based RAPL PMU support

 drivers/powercap/intel_rapl_common.c          | 36 +++++++++--------
 drivers/powercap/intel_rapl_msr.c             | 40 +++++++++++++++++--
 drivers/powercap/intel_rapl_tpmi.c            |  2 +-
 .../int340x_thermal/processor_thermal_rapl.c  |  2 +-
 include/linux/intel_rapl.h                    |  2 +-
 5 files changed, 59 insertions(+), 23 deletions(-)

-- 
2.43.0