mbox series

[0/3] Improve usability for amd-pstate

Message ID 20220325054228.5247-1-mario.limonciello@amd.com
Headers show
Series Improve usability for amd-pstate | expand

Message

Mario Limonciello March 25, 2022, 5:42 a.m. UTC 
There has recently been some news coverage about `amd-pstate` being in
5.17, but this news also mentioned that it's a bit difficult to use.

You need to either block init calls, or compile the module into the kernel
to force it to take precedence over acpi-cpufreq.

This series aims to improve the usability of amd-pstate so that distros
can compile as a module, but users can still use it (relatively) easily.

A new module parameter is included that will force amd-pstate to take
precedence and a module table to let it load automatically on such systems.

With the patches in this series a user can make a file
/etc/modprobe.d/amd-pstate.conf:

options amd-pstate replace=1

Then upon the next reboot amd-pstate should load automatically even if
acpi-cpufreq was included on the system.
Mario Limonciello (3):
  cpufreq: Allow passing NULL as the argument for unregistering a driver
  cpufreq: amd-pstate: Allow replacing existing cpufreq drivers when
    loaded
  cpufreq: amd-pstate: Add a module device table

 drivers/cpufreq/amd-pstate.c | 19 ++++++++++++++++---
 drivers/cpufreq/cpufreq.c    |  4 ++--
 2 files changed, 18 insertions(+), 5 deletions(-)