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Merge branch 'pm-cpufreq'

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Merge cpufreq updates for 6.16-rc1:

 - Refactor cpufreq_online(), add and use cpufreq policy locking guards,
   use __free() in policy reference counting, and clean up core cpufreq
   code on top of that (Rafael Wysocki).

 - Fix boost handling on CPU suspend/resume and sysfs updates (Viresh
   Kumar).

 - Fix des_perf clamping with max_perf in amd_pstate_update() (Dhananjay
   Ugwekar).

 - Add offline, online and suspend callbacks to the amd-pstate driver,
   rename and use the existing amd_pstate_epp callbacks in it (Dhananjay
   Ugwekar).

 - Add support for the "Requested CPU Min frequency" BIOS option to the
   amd-pstate driver (Dhananjay Ugwekar).

 - Reset amd-pstate driver mode after running selftests (Swapnil
   Sapkal).

 - Add helper for governor checks to the schedutil cpufreq governor and
   move cpufreq-specific EAS checks to cpufreq (Rafael Wysocki).

 - Populate the cpu_capacity sysfs entries from the intel_pstate driver
   after registering asym capacity support (Ricardo Neri).

 - Add support for enabling Energy-aware scheduling (EAS) to the
   intel_pstate driver when operating in the passive mode on a hybrid
   platform (Rafael Wysocki).

 - Avoid shadowing ret in amd_pstate_ut_check_driver() (Nathan
   Chancellor).

 - Drop redundant cpus_read_lock() from store_local_boost() in the
   cpufreq core (Seyediman Seyedarab).

 - Replace sscanf() with kstrtouint() in the cpufreq code and use a
   symbol instead of a raw number in it (Bowen Yu).

 - Add support for autonomous CPU performance state selection to the
   CPPC cpufreq driver (Lifeng Zheng).

* pm-cpufreq: (31 commits)
  cpufreq: CPPC: Add support for autonomous selection
  cpufreq: Update sscanf() to kstrtouint()
  cpufreq: Replace magic number
  cpufreq: drop redundant cpus_read_lock() from store_local_boost()
  cpufreq/amd-pstate: Avoid shadowing ret in amd_pstate_ut_check_driver()
  cpufreq: intel_pstate: Document hybrid processor support
  cpufreq: intel_pstate: EAS: Increase cost for CPUs using L3 cache
  cpufreq: intel_pstate: EAS support for hybrid platforms
  cpufreq: Drop policy locking from cpufreq_policy_is_good_for_eas()
  cpufreq: intel_pstate: Populate the cpu_capacity sysfs entries
  arch_topology: Relocate cpu_scale to topology.[h|c]
  cpufreq/sched: Move cpufreq-specific EAS checks to cpufreq
  cpufreq/sched: schedutil: Add helper for governor checks
  amd-pstate-ut: Reset amd-pstate driver mode after running selftests
  cpufreq/amd-pstate: Add support for the "Requested CPU Min frequency" BIOS option
  cpufreq/amd-pstate: Add offline, online and suspend callbacks for amd_pstate_driver
  cpufreq: Force sync policy boost with global boost on sysfs update
  cpufreq: Preserve policy's boost state after resume
  cpufreq: Introduce policy_set_boost()
  cpufreq: Don't unnecessarily call set_boost()
  ...
This commit is contained in:
Rafael J. Wysocki
2025-05-26 20:19:40 +02:00
parent e481e10ab5 922607a2b4
commit f34dc28343
16 changed files with 836 additions and 418 deletions
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54
Documentation/ABI/testing/sysfs-devices-system-cpu
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@@ -268,6 +268,60 @@ Description: Discover CPUs in the same CPU frequency coordination domain
This file is only present if the acpi-cpufreq or the cppc-cpufreq
drivers are in use.
What: /sys/devices/system/cpu/cpuX/cpufreq/auto_select
Date: May 2025
Contact: linux-pm@vger.kernel.org
Description: Autonomous selection enable
Read/write interface to control autonomous selection enable
Read returns autonomous selection status:
0: autonomous selection is disabled
1: autonomous selection is enabled
Write 'y' or '1' or 'on' to enable autonomous selection.
Write 'n' or '0' or 'off' to disable autonomous selection.
This file is only present if the cppc-cpufreq driver is in use.
What: /sys/devices/system/cpu/cpuX/cpufreq/auto_act_window
Date: May 2025
Contact: linux-pm@vger.kernel.org
Description: Autonomous activity window
This file indicates a moving utilization sensitivity window to
the platform's autonomous selection policy.
Read/write an integer represents autonomous activity window (in
microseconds) from/to this file. The max value to write is
1270000000 but the max significand is 127. This means that if 128
is written to this file, 127 will be stored. If the value is
greater than 130, only the first two digits will be saved as
significand.
Writing a zero value to this file enable the platform to
determine an appropriate Activity Window depending on the workload.
Writing to this file only has meaning when Autonomous Selection is
enabled.
This file is only present if the cppc-cpufreq driver is in use.
What: /sys/devices/system/cpu/cpuX/cpufreq/energy_performance_preference_val
Date: May 2025
Contact: linux-pm@vger.kernel.org
Description: Energy performance preference
Read/write an 8-bit integer from/to this file. This file
represents a range of values from 0 (performance preference) to
0xFF (energy efficiency preference) that influences the rate of
performance increase/decrease and the result of the hardware's
energy efficiency and performance optimization policies.
Writing to this file only has meaning when Autonomous Selection is
enabled.
This file is only present if the cppc-cpufreq driver is in use.
What: /sys/devices/system/cpu/cpu*/cache/index3/cache_disable_{0,1}
Date: August 2008