mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
184475029a
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits) drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c powerpc/85xx: fix mpic configuration in CAMP mode powerpc: Copy back TIF flags on return from softirq stack powerpc/64: Make server perfmon only built on ppc64 server devices powerpc/pseries: Fix hvc_vio.c build due to recent changes powerpc: Exporting boot_cpuid_phys powerpc: Add CFAR to oops output hvc_console: Add kdb support powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon powerpc/irq: Quieten irq mapping printks powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs powerpc: Add mpt2sas driver to pseries and ppc64 defconfig powerpc: Disable IRQs off tracer in ppc64 defconfig powerpc: Sync pseries and ppc64 defconfigs powerpc/pseries/hvconsole: Fix dropped console output hvc_console: Improve tty/console put_chars handling powerpc/kdump: Fix timeout in crash_kexec_wait_realmode powerpc/mm: Fix output of total_ram. powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards powerpc: Correct annotations of pmu registration functions ... Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and drivers/cpufreq
199 lines
6.1 KiB
Plaintext
199 lines
6.1 KiB
Plaintext
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/cpu-freq>.
|
|
|
|
If in doubt, say N.
|
|
|
|
if CPU_FREQ
|
|
|
|
config CPU_FREQ_TABLE
|
|
tristate
|
|
|
|
config CPU_FREQ_STAT
|
|
tristate "CPU frequency translation statistics"
|
|
select CPU_FREQ_TABLE
|
|
default y
|
|
help
|
|
This driver exports CPU frequency statistics information through sysfs
|
|
file system.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called cpufreq_stats.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_STAT_DETAILS
|
|
bool "CPU frequency translation statistics details"
|
|
depends on CPU_FREQ_STAT
|
|
help
|
|
This will show detail CPU frequency translation table in sysfs file
|
|
system.
|
|
|
|
If in doubt, say N.
|
|
|
|
choice
|
|
prompt "Default CPUFreq governor"
|
|
default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110
|
|
default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
|
|
help
|
|
This option sets which CPUFreq governor shall be loaded at
|
|
startup. If in doubt, select 'performance'.
|
|
|
|
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"
|
|
depends on EXPERT
|
|
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"
|
|
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"
|
|
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.
|
|
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.
|
|
|
|
For details, take a look at <file:Documentation/cpu-freq/>.
|
|
|
|
If in doubt, say Y.
|
|
|
|
config CPU_FREQ_GOV_ONDEMAND
|
|
tristate "'ondemand' cpufreq policy governor"
|
|
select CPU_FREQ_TABLE
|
|
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 linux/Documentation/cpu-freq.
|
|
|
|
If in doubt, say N.
|
|
|
|
config CPU_FREQ_GOV_CONSERVATIVE
|
|
tristate "'conservative' cpufreq governor"
|
|
depends on CPU_FREQ
|
|
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 linux/Documentation/cpu-freq.
|
|
|
|
If in doubt, say N.
|
|
|
|
menu "x86 CPU frequency scaling drivers"
|
|
depends on X86
|
|
source "drivers/cpufreq/Kconfig.x86"
|
|
endmenu
|
|
|
|
menu "ARM CPU frequency scaling drivers"
|
|
depends on ARM
|
|
source "drivers/cpufreq/Kconfig.arm"
|
|
endmenu
|
|
|
|
menu "PowerPC CPU frequency scaling drivers"
|
|
depends on PPC32 || PPC64
|
|
source "drivers/cpufreq/Kconfig.powerpc"
|
|
endmenu
|
|
|
|
endif
|
|
endmenu
|