linux-kernel - [GIT PULL] Power management fixes for v6.1-rc7

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Date:   Fri, 25 Nov 2022 18:42:17 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] Power management fixes for v6.1-rc7

Hi Linus,

Please pull from the tag

 git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
 pm-6.1-rc7

with top-most commit 1056d314709d0607a22e589c54b1e47e0da57b9d

 Documentation: add amd-pstate kernel command line options

on top of commit eb7081409f94a9a8608593d0fb63a1aa3d6f95d8

 Linux 6.1-rc6

to receive power management fixes for 6.1-rc7.

These revert a recent change in the schedutil cpufreq governor that
had not been expected to make any functional difference, but turned
out to introduce a performance regression, fix an initialization issue
in the amd-pstate driver and make it actually replace the venerable
ACPI cpufreq driver on the supported systems by default.

Specifics:

 - Revert a recent schedutil cpufreq governor change that introduced
   a performance regression on Pixel 6 (Sam Wu).

 - Fix amd-pstate driver initialization after running the kernel via
   kexec (Wyes Karny).

 - Turn amd-pstate into a built-in driver which allows it to take
   precedence over acpi-cpufreq by default on supported systems and
   amend it with a mechanism to disable this behavior (Perry Yuan).

 - Update amd-pstate documentation in accordance with the other changes
   made to it (Perry Yuan).

Thanks!


---------------

Perry Yuan (4):
      cpufreq: amd-pstate: change amd-pstate driver to be built-in type
      cpufreq: amd-pstate: add amd-pstate driver parameter for mode selection
      Documentation: amd-pstate: add driver working mode introduction
      Documentation: add amd-pstate kernel command line options

Sam Wu (1):
      Revert "cpufreq: schedutil: Move max CPU capacity to sugov_policy"

Wyes Karny (1):
      cpufreq: amd-pstate: cpufreq: amd-pstate: reset MSR_AMD_PERF_CTL
register at init

---------------

 Documentation/admin-guide/kernel-parameters.txt | 11 ++++++
 Documentation/admin-guide/pm/amd-pstate.rst     | 30 +++++++--------
 drivers/cpufreq/Kconfig.x86                     |  2 +-
 drivers/cpufreq/amd-pstate.c                    | 49 +++++++++++++++++--------
 kernel/sched/cpufreq_schedutil.c                | 30 +++++++--------
 5 files changed, 74 insertions(+), 48 deletions(-)