diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-05-20 22:03:41 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-05-20 22:03:41 +0200 |
| commit | a67f3113331d9fb3eb0664602d9b581cb2df7294 (patch) | |
| tree | 169ab98f163dbf64d8ed67ae4bcd63c55bf5117c /Documentation/admin-guide | |
| parent | 85cffdb21bc1a928f4c89f88dcdf42a460b04e70 (diff) | |
| parent | e4e9b7b38d5db2cc6a8770bc0596bb8b36b92b1f (diff) | |
Merge tag 'amd-pstate-v7.1-2026-05-14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux into pm-cpufreq-fixes
Merge amd-pstate fixes for 7.1 (05/14/2026) from Mario Limonciello:
"A number of fixes to the dynamic epp feature which was new
to kernel 7.1, including making it opt in only."
* tag 'amd-pstate-v7.1-2026-05-14' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
cpufreq/amd-pstate: Drop Kconfig option for dynamic EPP
cpufreq/amd-pstate-ut: Drop policy reference before driver switch
cpufreq/amd-pstate: Use "epp_default_dc" as default when dynamic_epp is disabled
cpufreq/amd-pstate: Reorder notifier unregistration and floor perf reset
cpufreq/amd-pstate: Allow writes to dynamic_epp when state isn't modified
cpufreq/amd-pstate: Return -ENOMEM on failure to allocate profile_name
cpufreq/amd-pstate: Grab "amd_pstate_driver_lock" when toggling dynamic_epp
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/pm/amd-pstate.rst | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index f8e7050fc762..a95e2ebce005 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -358,9 +358,9 @@ Dynamic energy performance profile The amd-pstate driver supports dynamically selecting the energy performance profile based on whether the machine is running on AC or DC power. -Whether this behavior is enabled by default depends on the kernel -config option `CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP`. This behavior can also be overridden -at runtime by the sysfs file ``/sys/devices/system/cpu/cpufreq/policyX/dynamic_epp``. +Whether this behavior is enabled by default depends on the kernel command line option +``amd_dynamic_epp`` is set. This behavior can also be overridden +at runtime by the sysfs file ``/sys/devices/system/cpu/amd_pstate/dynamic_epp``. When set to enabled, the driver will select a different energy performance profile when the machine is running on battery or AC power. The driver will @@ -485,9 +485,8 @@ kernel parameter ``amd_prefcore=disable``. ``amd_dynamic_epp`` When AMD pstate is in auto mode, dynamic EPP will control whether the kernel -autonomously changes the EPP mode. The default is configured by -``CONFIG_X86_AMD_PSTATE_DYNAMIC_EPP`` but can be explicitly enabled with -``amd_dynamic_epp=enable`` or disabled with ``amd_dynamic_epp=disable``. +autonomously changes the EPP mode. The default is disabled. It can be enabled +with the kernel parameter ``amd_dynamic_epp=enable``. User Space Interface in ``sysfs`` - General =========================================== |