linux-kernel - [PATCH v2 00/10] AMD Pstate Driver Fixes and Improvements

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Date: Mon, 13 May 2024 10:07:18 +0800
From: Perry Yuan <perry.yuan@....com>
To: <Mario.Limonciello@....com>, <gautham.shenoy@....com>,
	<Ray.Huang@....com>, <Borislav.Petkov@....com>
CC: <rafael.j.wysocki@...el.com>, <Alexander.Deucher@....com>,
	<Xinmei.Huang@....com>, <Xiaojian.Du@....com>, <Li.Meng@....com>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 00/10] AMD Pstate Driver Fixes and Improvements

Hello everyone,

This patchset addresses critical issues and enhances performance settings for CPUs
with heterogeneous core types in the AMD pstate driver. 
Specifically, it resolves problems related to calculating the highest performance
and frequency on the latest CPUs with preferred cores. 
Additionally, the patchset includes documentation improvements in amd-pstate.rst,
offering a comprehensive guide covering topics such as recommended reboot requirements
during driver switching, debugging procedures for driver loading failures.

Your feedback and suggestions for improvement are highly appreciated. 
Please review the patches and provide your valuable input.

Thank you.

Best regards,
Perry.

Changes from V1:
 * drop patch 11 which has been merged in a separate patch. (Mario)
 * fix some typos in commit log and tile (Mario)
 * fix the patch 11 regression issue of kernel command line (Oleksandr Natalenko)
 * pick ack flag for patch 7 (Mario)
 * drop patch 4 which is not recommended for user(Mario)
 * rebase to linux-pm/bleeding-edge branch
 * fix some build warning
 * rework the patch 3 for CPU ID matching(Mario)
 * address feedback for patch 5 (Mario)
 * move the acpi pm profile after got default mode(Mario)

Perry Yuan (10):
  cpufreq: amd-pstate: optimize the initial frequency values
    verification
  cpufreq: amd-pstate: remove unused  variable nominal_freq
  cpufreq: amd-pstate: show CPPC debug message if CPPC is not supported
  cpufreq: amd-pstate: add debug message while CPPC is supported and
    disabled by SBIOS
  Documentation: PM: amd-pstate: add debugging section for driver
    loading failure
  Documentation: PM: amd-pstate: add guided mode to the Operation mode
  cpufreq: amd-pstate: switch boot_cpu_has() to cpu_feature_enabled()
  x86/cpufeatures: Add feature bits for AMD heterogeneous processor
  cpufreq: amd-pstate: implement heterogeneous core topology for highest
    performance initialization
  cpufreq: amd-pstate: automatically load pstate driver by default

 Documentation/admin-guide/pm/amd-pstate.rst |  15 +-
 arch/x86/include/asm/cpufeatures.h          |   1 +
 arch/x86/include/asm/processor.h            |   2 +
 arch/x86/kernel/cpu/amd.c                   |  19 ++
 arch/x86/kernel/cpu/scattered.c             |   1 +
 drivers/cpufreq/amd-pstate.c                | 209 +++++++++++++-------
 include/linux/amd-pstate.h                  |   8 +
 7 files changed, 181 insertions(+), 74 deletions(-)

-- 
2.34.1