Merge tag 'amd-pstate-v6.15-2025-03-06' of ssh://gitolite.kernel.org/pub/scm/linux...

Merge amd-pstate updates for 6.15 (3/6/25) from Mario Limonciello:

"A lot of code optimization to avoid cases where call paths will end up
 calling the same writes multiple times and needlessly caching variables.
 To accomplish this some of the writes are now made into an atomically
 written "perf" variable. Locking has been overhauled to ensure it only
 applies to the necessary functions. Tracing has been adjusted to ensure
 trace events only are used right before writing out to the hardware."

NOTE: This is a redo of amd-pstate-v6.15-2025-03-03 with a fixed Fixes tag.

* tag 'amd-pstate-v6.15-2025-03-06' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux: (29 commits)
  cpufreq/amd-pstate: Drop actions in amd_pstate_epp_cpu_offline()
  cpufreq/amd-pstate: Stop caching EPP
  cpufreq/amd-pstate: Rework CPPC enabling
  cpufreq/amd-pstate: Drop debug statements for policy setting
  cpufreq/amd-pstate: Update cppc_req_cached for shared mem EPP writes
  cpufreq/amd-pstate: Move all EPP tracing into *_update_perf and *_set_epp functions
  cpufreq/amd-pstate: Cache CPPC request in shared mem case too
  cpufreq/amd-pstate: Replace all AMD_CPPC_* macros with masks
  cpufreq/amd-pstate-ut: Adjust variable scope
  cpufreq/amd-pstate-ut: Run on all of the correct CPUs
  cpufreq/amd-pstate-ut: Drop SUCCESS and FAIL enums
  cpufreq/amd-pstate-ut: Allow lowest nonlinear and lowest to be the same
  cpufreq/amd-pstate-ut: Use _free macro to free put policy
  cpufreq/amd-pstate: Drop `cppc_cap1_cached`
  cpufreq/amd-pstate: Overhaul locking
  cpufreq/amd-pstate: Move perf values into a union
  cpufreq/amd-pstate: Drop min and max cached frequencies
  cpufreq/amd-pstate: Show a warning when a CPU fails to setup
  cpufreq/amd-pstate: Invalidate cppc_req_cached during suspend
  cpufreq/amd-pstate: Fix the clamping of perf values
  ...