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linux/drivers/cpufreq/Kconfig
Linus Torvalds 2504ba8b01 Merge tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 
Pull power management updates from Rafael Wysocki:
 "These add EPP support to the AMD P-state cpufreq driver, add support
  for new platforms to the Intel RAPL power capping driver, intel_idle
  and the Qualcomm cpufreq driver, enable thermal cooling for Tegra194,
  drop the custom cpufreq driver for loongson1 that is not necessary any
  more (and the corresponding cpufreq platform device), fix assorted
  issues and clean up code.

  Specifics:

   - Add EPP support to the AMD P-state cpufreq driver (Perry Yuan, Wyes
     Karny, Arnd Bergmann, Bagas Sanjaya)

   - Drop the custom cpufreq driver for loongson1 that is not necessary
     any more and the corresponding cpufreq platform device (Keguang
     Zhang)

   - Remove "select SRCU" from system sleep, cpufreq and OPP Kconfig
     entries (Paul E. McKenney)

   - Enable thermal cooling for Tegra194 (Yi-Wei Wang)

   - Register module device table and add missing compatibles for
     cpufreq-qcom-hw (Nícolas F. R. A. Prado, Abel Vesa and Luca Weiss)

   - Various dt binding updates for qcom-cpufreq-nvmem and
     opp-v2-kryo-cpu (Christian Marangi)

   - Make kobj_type structure in the cpufreq core constant (Thomas
     Weißschuh)

   - Make cpufreq_unregister_driver() return void (Uwe Kleine-König)

   - Make the TEO cpuidle governor check CPU utilization in order to
     refine idle state selection (Kajetan Puchalski)

   - Make Kconfig select the haltpoll cpuidle governor when the haltpoll
     cpuidle driver is selected and replace a default_idle() call in
     that driver with arch_cpu_idle() to allow MWAIT to be used (Li
     RongQing)

   - Add Emerald Rapids Xeon support to the intel_idle driver (Artem
     Bityutskiy)

   - Add ARCH_SUSPEND_POSSIBLE dependencies for ARMv4 cpuidle drivers to
     avoid randconfig build failures (Arnd Bergmann)

   - Make kobj_type structures used in the cpuidle sysfs interface
     constant (Thomas Weißschuh)

   - Make the cpuidle driver registration code update microsecond values
     of idle state parameters in accordance with their nanosecond values
     if they are provided (Rafael Wysocki)

   - Make the PSCI cpuidle driver prevent topology CPUs from being
     suspended on PREEMPT_RT (Krzysztof Kozlowski)

   - Document that pm_runtime_force_suspend() cannot be used with
     DPM_FLAG_SMART_SUSPEND (Richard Fitzgerald)

   - Add EXPORT macros for exporting PM functions from drivers (Richard
     Fitzgerald)

   - Remove /** from non-kernel-doc comments in hibernation code (Randy
     Dunlap)

   - Fix possible name leak in powercap_register_zone() (Yang Yingliang)

   - Add Meteor Lake and Emerald Rapids support to the intel_rapl power
     capping driver (Zhang Rui)

   - Modify the idle_inject power capping facility to support 100% idle
     injection (Srinivas Pandruvada)

   - Fix large time windows handling in the intel_rapl power capping
     driver (Zhang Rui)

   - Fix memory leaks with using debugfs_lookup() in the generic PM
     domains and Energy Model code (Greg Kroah-Hartman)

   - Add missing 'cache-unified' property in the example for kryo OPP
     bindings (Rob Herring)

   - Fix error checking in opp_migrate_dentry() (Qi Zheng)

   - Let qcom,opp-fuse-level be a 2-long array for qcom SoCs (Konrad
     Dybcio)

   - Modify some power management utilities to use the canonical ftrace
     path (Ross Zwisler)

   - Correct spelling problems for Documentation/power/ as reported by
     codespell (Randy Dunlap)"

* tag 'pm-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (53 commits)
  Documentation: amd-pstate: disambiguate user space sections
  cpufreq: amd-pstate: Fix invalid write to MSR_AMD_CPPC_REQ
  dt-bindings: opp: opp-v2-kryo-cpu: enlarge opp-supported-hw maximum
  dt-bindings: cpufreq: qcom-cpufreq-nvmem: make cpr bindings optional
  dt-bindings: cpufreq: qcom-cpufreq-nvmem: specify supported opp tables
  PM: Add EXPORT macros for exporting PM functions
  cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT
  MIPS: loongson32: Drop obsolete cpufreq platform device
  powercap: intel_rapl: Fix handling for large time window
  cpuidle: driver: Update microsecond values of state parameters as needed
  cpuidle: sysfs: make kobj_type structures constant
  cpuidle: add ARCH_SUSPEND_POSSIBLE dependencies
  PM: EM: fix memory leak with using debugfs_lookup()
  PM: domains: fix memory leak with using debugfs_lookup()
  cpufreq: Make kobj_type structure constant
  cpufreq: davinci: Fix clk use after free
  cpufreq: amd-pstate: avoid uninitialized variable use
  cpufreq: Make cpufreq_unregister_driver() return void
  OPP: fix error checking in opp_migrate_dentry()
  dt-bindings: cpufreq: cpufreq-qcom-hw: Add SM8550 compatible
  ...
2023-02-21 12:13:58 -08:00

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# SPDX-License-Identifier: GPL-2.0-only
menu "CPU Frequency scaling"
config CPU_FREQ
bool "CPU Frequency scaling"
help
CPU Frequency scaling allows you to change the clock speed of
CPUs on the fly. This is a nice method to save power, because
the lower the CPU clock speed, the less power the CPU consumes.
Note that this driver doesn't automatically change the CPU
clock speed, you need to either enable a dynamic cpufreq governor
(see below) after boot, or use a userspace tool.
For details, take a look at
<file:Documentation/admin-guide/pm/cpufreq.rst>.
If in doubt, say N.
if CPU_FREQ
config CPU_FREQ_GOV_ATTR_SET
bool
config CPU_FREQ_GOV_COMMON
select CPU_FREQ_GOV_ATTR_SET
select IRQ_WORK
bool
config CPU_FREQ_STAT
bool "CPU frequency transition statistics"
help
Export CPU frequency statistics information through sysfs.
If in doubt, say N.
choice
prompt "Default CPUFreq governor"
default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1110_CPUFREQ
default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if ARM64 || ARM
default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if X86_INTEL_PSTATE && SMP
default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
help
This option sets which CPUFreq governor shall be loaded at
startup. If in doubt, use the default setting.
config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
bool "performance"
select CPU_FREQ_GOV_PERFORMANCE
help
Use the CPUFreq governor 'performance' as default. This sets
the frequency statically to the highest frequency supported by
the CPU.
config CPU_FREQ_DEFAULT_GOV_POWERSAVE
bool "powersave"
select CPU_FREQ_GOV_POWERSAVE
help
Use the CPUFreq governor 'powersave' as default. This sets
the frequency statically to the lowest frequency supported by
the CPU.
config CPU_FREQ_DEFAULT_GOV_USERSPACE
bool "userspace"
select CPU_FREQ_GOV_USERSPACE
help
Use the CPUFreq governor 'userspace' as default. This allows
you to set the CPU frequency manually or when a userspace
program shall be able to set the CPU dynamically without having
to enable the userspace governor manually.
config CPU_FREQ_DEFAULT_GOV_ONDEMAND
bool "ondemand"
depends on !(X86_INTEL_PSTATE && SMP)
select CPU_FREQ_GOV_ONDEMAND
select CPU_FREQ_GOV_PERFORMANCE
help
Use the CPUFreq governor 'ondemand' as default. This allows
you to get a full dynamic frequency capable system by simply
loading your cpufreq low-level hardware driver.
Be aware that not all cpufreq drivers support the ondemand
governor. If unsure have a look at the help section of the
driver. Fallback governor will be the performance governor.
config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
bool "conservative"
depends on !(X86_INTEL_PSTATE && SMP)
select CPU_FREQ_GOV_CONSERVATIVE
select CPU_FREQ_GOV_PERFORMANCE
help
Use the CPUFreq governor 'conservative' as default. This allows
you to get a full dynamic frequency capable system by simply
loading your cpufreq low-level hardware driver.
Be aware that not all cpufreq drivers support the conservative
governor. If unsure have a look at the help section of the
driver. Fallback governor will be the performance governor.
config CPU_FREQ_DEFAULT_GOV_SCHEDUTIL
bool "schedutil"
depends on SMP
select CPU_FREQ_GOV_SCHEDUTIL
select CPU_FREQ_GOV_PERFORMANCE
help
Use the 'schedutil' CPUFreq governor by default. If unsure,
have a look at the help section of that governor. The fallback
governor will be 'performance'.
endchoice
config CPU_FREQ_GOV_PERFORMANCE
tristate "'performance' governor"
help
This cpufreq governor sets the frequency statically to the
highest available CPU frequency.
To compile this driver as a module, choose M here: the
module will be called cpufreq_performance.
If in doubt, say Y.
config CPU_FREQ_GOV_POWERSAVE
tristate "'powersave' governor"
help
This cpufreq governor sets the frequency statically to the
lowest available CPU frequency.
To compile this driver as a module, choose M here: the
module will be called cpufreq_powersave.
If in doubt, say Y.
config CPU_FREQ_GOV_USERSPACE
tristate "'userspace' governor for userspace frequency scaling"
help
Enable this cpufreq governor when you either want to set the
CPU frequency manually or when a userspace program shall
be able to set the CPU dynamically, like on LART
<http://www.lartmaker.nl/>.
To compile this driver as a module, choose M here: the
module will be called cpufreq_userspace.
If in doubt, say Y.
config CPU_FREQ_GOV_ONDEMAND
tristate "'ondemand' cpufreq policy governor"
select CPU_FREQ_GOV_COMMON
help
'ondemand' - This driver adds a dynamic cpufreq policy governor.
The governor does a periodic polling and
changes frequency based on the CPU utilization.
The support for this governor depends on CPU capability to
do fast frequency switching (i.e, very low latency frequency
transitions).
To compile this driver as a module, choose M here: the
module will be called cpufreq_ondemand.
For details, take a look at
<file:Documentation/admin-guide/pm/cpufreq.rst>.
If in doubt, say N.
config CPU_FREQ_GOV_CONSERVATIVE
tristate "'conservative' cpufreq governor"
depends on CPU_FREQ
select CPU_FREQ_GOV_COMMON
help
'conservative' - this driver is rather similar to the 'ondemand'
governor both in its source code and its purpose, the difference is
its optimisation for better suitability in a battery powered
environment. The frequency is gracefully increased and decreased
rather than jumping to 100% when speed is required.
If you have a desktop machine then you should really be considering
the 'ondemand' governor instead, however if you are using a laptop,
PDA or even an AMD64 based computer (due to the unacceptable
step-by-step latency issues between the minimum and maximum frequency
transitions in the CPU) you will probably want to use this governor.
To compile this driver as a module, choose M here: the
module will be called cpufreq_conservative.
For details, take a look at
<file:Documentation/admin-guide/pm/cpufreq.rst>.
If in doubt, say N.
config CPU_FREQ_GOV_SCHEDUTIL
bool "'schedutil' cpufreq policy governor"
depends on CPU_FREQ && SMP
select CPU_FREQ_GOV_ATTR_SET
select IRQ_WORK
help
This governor makes decisions based on the utilization data provided
by the scheduler. It sets the CPU frequency to be proportional to
the utilization/capacity ratio coming from the scheduler. If the
utilization is frequency-invariant, the new frequency is also
proportional to the maximum available frequency. If that is not the
case, it is proportional to the current frequency of the CPU. The
frequency tipping point is at utilization/capacity equal to 80% in
both cases.
If in doubt, say N.
comment "CPU frequency scaling drivers"
config CPUFREQ_DT
tristate "Generic DT based cpufreq driver"
depends on HAVE_CLK && OF
select CPUFREQ_DT_PLATDEV
select PM_OPP
help
This adds a generic DT based cpufreq driver for frequency management.
It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
systems.
If in doubt, say N.
config CPUFREQ_DT_PLATDEV
bool
help
This adds a generic DT based cpufreq platdev driver for frequency
management. This creates a 'cpufreq-dt' platform device, on the
supported platforms.
If in doubt, say N.
if X86
source "drivers/cpufreq/Kconfig.x86"
endif
if ARM || ARM64
source "drivers/cpufreq/Kconfig.arm"
endif
if PPC32 || PPC64
source "drivers/cpufreq/Kconfig.powerpc"
endif
if IA64
config IA64_ACPI_CPUFREQ
tristate "ACPI Processor P-States driver"
depends on ACPI_PROCESSOR
help
This driver adds a CPUFreq driver which utilizes the ACPI
Processor Performance States.
If in doubt, say N.
endif
if MIPS
config BMIPS_CPUFREQ
tristate "BMIPS CPUfreq Driver"
help
This option adds a CPUfreq driver for BMIPS processors with
support for configurable CPU frequency.
For now, BMIPS5 chips are supported (such as the Broadcom 7425).
If in doubt, say N.
config LOONGSON2_CPUFREQ
tristate "Loongson2 CPUFreq Driver"
depends on LEMOTE_MACH2F
help
This option adds a CPUFreq driver for loongson processors which
support software configurable cpu frequency.
Loongson2F and its successors support this feature.
If in doubt, say N.
endif
if SPARC64
config SPARC_US3_CPUFREQ
tristate "UltraSPARC-III CPU Frequency driver"
help
This adds the CPUFreq driver for UltraSPARC-III processors.
If in doubt, say N.
config SPARC_US2E_CPUFREQ
tristate "UltraSPARC-IIe CPU Frequency driver"
help
This adds the CPUFreq driver for UltraSPARC-IIe processors.
If in doubt, say N.
endif
if SUPERH
config SH_CPU_FREQ
tristate "SuperH CPU Frequency driver"
help
This adds the cpufreq driver for SuperH. Any CPU that supports
clock rate rounding through the clock framework can use this
driver. While it will make the kernel slightly larger, this is
harmless for CPUs that don't support rate rounding. The driver
will also generate a notice in the boot log before disabling
itself if the CPU in question is not capable of rate rounding.
If unsure, say N.
endif
config QORIQ_CPUFREQ
tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
depends on OF && COMMON_CLK
depends on PPC_E500MC || SOC_LS1021A || ARCH_LAYERSCAPE || COMPILE_TEST
select CLK_QORIQ
help
This adds the CPUFreq driver support for Freescale QorIQ SoCs
which are capable of changing the CPU's frequency dynamically.
endif
endmenu
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