diff options
Diffstat (limited to 'kernel/power/Kconfig')
| -rw-r--r-- | kernel/power/Kconfig | 334 |
1 files changed, 218 insertions, 116 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 14b0e10dc95..9a83d780fac 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -1,135 +1,42 @@ -config PM - bool "Power Management support" - depends on !IA64_HP_SIM - ---help--- - "Power Management" means that parts of your computer are shut - off or put into a power conserving "sleep" mode if they are not - being used. There are two competing standards for doing this: APM - and ACPI. If you want to use either one, say Y here and then also - to the requisite support below. - - Power Management is most important for battery powered laptop - computers; if you have a laptop, check out the Linux Laptop home - page on the WWW at <http://www.linux-on-laptops.com/> or - Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/> - and the Battery Powered Linux mini-HOWTO, available from - <http://www.tldp.org/docs.html#howto>. - - Note that, even if you say N here, Linux on the x86 architecture - will issue the hlt instruction if nothing is to be done, thereby - sending the processor to sleep and saving power. - -config PM_LEGACY - bool "Legacy Power Management API (DEPRECATED)" - depends on PM - default n - ---help--- - Support for pm_register() and friends. This old API is obsoleted - by the driver model. - - If unsure, say N. - -config PM_DEBUG - bool "Power Management Debug Support" - depends on PM - ---help--- - This option enables various debugging support in the Power Management - code. This is helpful when debugging and reporting PM bugs, like - suspend support. - -config PM_VERBOSE - bool "Verbose Power Management debugging" - depends on PM_DEBUG - default n - ---help--- - This option enables verbose messages from the Power Management code. - -config DISABLE_CONSOLE_SUSPEND - bool "Keep console(s) enabled during suspend/resume (DANGEROUS)" - depends on PM_DEBUG && PM_SLEEP - default n - ---help--- - This option turns off the console suspend mechanism that prevents - debug messages from reaching the console during the suspend/resume - operations. This may be helpful when debugging device drivers' - suspend/resume routines, but may itself lead to problems, for example - if netconsole is used. - -config PM_TRACE - bool "Suspend/resume event tracing" - depends on PM_DEBUG && X86 && PM_SLEEP && EXPERIMENTAL - default n - ---help--- - This enables some cheesy code to save the last PM event point in the - RTC across reboots, so that you can debug a machine that just hangs - during suspend (or more commonly, during resume). - - To use this debugging feature you should attempt to suspend the machine, - then reboot it, then run - - dmesg -s 1000000 | grep 'hash matches' - - CAUTION: this option will cause your machine's real-time clock to be - set to an invalid time after a resume. - -config PM_SLEEP_SMP - bool - depends on SUSPEND_SMP_POSSIBLE || HIBERNATION_SMP_POSSIBLE - depends on PM_SLEEP - select HOTPLUG_CPU - default y - -config PM_SLEEP - bool - depends on SUSPEND || HIBERNATION - default y - -config SUSPEND_UP_POSSIBLE - bool - depends on (X86 && !X86_VOYAGER) || PPC || ARM || BLACKFIN || MIPS \ - || SUPERH || FRV - depends on !SMP - default y - -config SUSPEND_SMP_POSSIBLE - bool - depends on (X86 && !X86_VOYAGER) \ - || (PPC && (PPC_PSERIES || PPC_PMAC)) || ARM - depends on SMP - default y - config SUSPEND bool "Suspend to RAM and standby" - depends on PM - depends on SUSPEND_UP_POSSIBLE || SUSPEND_SMP_POSSIBLE + depends on ARCH_SUSPEND_POSSIBLE default y ---help--- Allow the system to enter sleep states in which main memory is powered and thus its contents are preserved, such as the - suspend-to-RAM state (i.e. the ACPI S3 state). + suspend-to-RAM state (e.g. the ACPI S3 state). -config HIBERNATION_UP_POSSIBLE - bool - depends on X86 || PPC64_SWSUSP || PPC32 - depends on !SMP +config SUSPEND_FREEZER + bool "Enable freezer for suspend to RAM/standby" \ + if ARCH_WANTS_FREEZER_CONTROL || BROKEN + depends on SUSPEND default y + help + This allows you to turn off the freezer for suspend. If this is + done, no tasks are frozen for suspend to RAM/standby. + + Turning OFF this setting is NOT recommended! If in doubt, say Y. -config HIBERNATION_SMP_POSSIBLE +config HIBERNATE_CALLBACKS bool - depends on (X86 && !X86_VOYAGER) || PPC64_SWSUSP - depends on SMP - default y config HIBERNATION bool "Hibernation (aka 'suspend to disk')" - depends on PM && SWAP - depends on HIBERNATION_UP_POSSIBLE || HIBERNATION_SMP_POSSIBLE + depends on SWAP && ARCH_HIBERNATION_POSSIBLE + select HIBERNATE_CALLBACKS + select LZO_COMPRESS + select LZO_DECOMPRESS + select CRC32 ---help--- Enable the suspend to disk (STD) functionality, which is usually called "hibernation" in user interfaces. STD checkpoints the system and powers it off; and restores that checkpoint on reboot. - You can suspend your machine with 'echo disk > /sys/power/state'. + You can suspend your machine with 'echo disk > /sys/power/state' + after placing resume=/dev/swappartition on the kernel command line + in your bootloader's configuration file. + Alternatively, you can use the additional userland tools available from <http://suspend.sf.net>. @@ -159,6 +66,9 @@ config HIBERNATION For more information take a look at <file:Documentation/power/swsusp.txt>. +config ARCH_SAVE_PAGE_KEYS + bool + config PM_STD_PARTITION string "Default resume partition" depends on HIBERNATION @@ -181,6 +91,142 @@ config PM_STD_PARTITION suspended image to. It will simply pick the first available swap device. +config PM_SLEEP + def_bool y + depends on SUSPEND || HIBERNATE_CALLBACKS + +config PM_SLEEP_SMP + def_bool y + depends on SMP + depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE + depends on PM_SLEEP + select HOTPLUG_CPU + +config PM_AUTOSLEEP + bool "Opportunistic sleep" + depends on PM_SLEEP + default n + ---help--- + Allow the kernel to trigger a system transition into a global sleep + state automatically whenever there are no active wakeup sources. + +config PM_WAKELOCKS + bool "User space wakeup sources interface" + depends on PM_SLEEP + default n + ---help--- + Allow user space to create, activate and deactivate wakeup source + objects with the help of a sysfs-based interface. + +config PM_WAKELOCKS_LIMIT + int "Maximum number of user space wakeup sources (0 = no limit)" + range 0 100000 + default 100 + depends on PM_WAKELOCKS + +config PM_WAKELOCKS_GC + bool "Garbage collector for user space wakeup sources" + depends on PM_WAKELOCKS + default y + +config PM_RUNTIME + bool "Run-time PM core functionality" + depends on !IA64_HP_SIM + ---help--- + Enable functionality allowing I/O devices to be put into energy-saving + (low power) states at run time (or autosuspended) after a specified + period of inactivity and woken up in response to a hardware-generated + wake-up event or a driver's request. + + Hardware support is generally required for this functionality to work + and the bus type drivers of the buses the devices are on are + responsible for the actual handling of the autosuspend requests and + wake-up events. + +config PM + def_bool y + depends on PM_SLEEP || PM_RUNTIME + +config PM_DEBUG + bool "Power Management Debug Support" + depends on PM + ---help--- + This option enables various debugging support in the Power Management + code. This is helpful when debugging and reporting PM bugs, like + suspend support. + +config PM_ADVANCED_DEBUG + bool "Extra PM attributes in sysfs for low-level debugging/testing" + depends on PM_DEBUG + ---help--- + Add extra sysfs attributes allowing one to access some Power Management + fields of device objects from user space. If you are not a kernel + developer interested in debugging/testing Power Management, say "no". + +config PM_TEST_SUSPEND + bool "Test suspend/resume and wakealarm during bootup" + depends on SUSPEND && PM_DEBUG && RTC_CLASS=y + ---help--- + This option will let you suspend your machine during bootup, and + make it wake up a few seconds later using an RTC wakeup alarm. + Enable this with a kernel parameter like "test_suspend=mem". + + You probably want to have your system's RTC driver statically + linked, ensuring that it's available when this test runs. + +config PM_SLEEP_DEBUG + def_bool y + depends on PM_DEBUG && PM_SLEEP + +config DPM_WATCHDOG + bool "Device suspend/resume watchdog" + depends on PM_DEBUG && PSTORE + ---help--- + Sets up a watchdog timer to capture drivers that are + locked up attempting to suspend/resume a device. + A detected lockup causes system panic with message + captured in pstore device for inspection in subsequent + boot session. + +config DPM_WATCHDOG_TIMEOUT + int "Watchdog timeout in seconds" + range 1 120 + default 12 + depends on DPM_WATCHDOG + +config PM_TRACE + bool + help + This enables code to save the last PM event point across + reboot. The architecture needs to support this, x86 for + example does by saving things in the RTC, see below. + + The architecture specific code must provide the extern + functions from <linux/resume-trace.h> as well as the + <asm/resume-trace.h> header with a TRACE_RESUME() macro. + + The way the information is presented is architecture- + dependent, x86 will print the information during a + late_initcall. + +config PM_TRACE_RTC + bool "Suspend/resume event tracing" + depends on PM_SLEEP_DEBUG + depends on X86 + select PM_TRACE + ---help--- + This enables some cheesy code to save the last PM event point in the + RTC across reboots, so that you can debug a machine that just hangs + during suspend (or more commonly, during resume). + + To use this debugging feature you should attempt to suspend the + machine, reboot it and then run + + dmesg -s 1000000 | grep 'hash matches' + + CAUTION: this option will cause your machine's real-time clock to be + set to an invalid time after a resume. + config APM_EMULATION tristate "Advanced Power Management Emulation" depends on PM && SYS_SUPPORTS_APM_EMULATION @@ -193,8 +239,8 @@ config APM_EMULATION notification of APM "events" (e.g. battery status change). In order to use APM, you will need supporting software. For location - and more information, read <file:Documentation/pm.txt> and the - Battery Powered Linux mini-HOWTO, available from + and more information, read <file:Documentation/power/apm-acpi.txt> + and the Battery Powered Linux mini-HOWTO, available from <http://www.tldp.org/docs.html#howto>. This driver does not spin down disk drives (see the hdparm(8) @@ -206,3 +252,59 @@ config APM_EMULATION random kernel OOPSes or reboots that don't seem to be related to anything, try disabling/enabling this option (or disabling/enabling APM in your BIOS). + +config ARCH_HAS_OPP + bool + +config PM_OPP + bool + ---help--- + SOCs have a standard set of tuples consisting of frequency and + voltage pairs that the device will support per voltage domain. This + is called Operating Performance Point or OPP. The actual definitions + of OPP varies over silicon within the same family of devices. + + OPP layer organizes the data internally using device pointers + representing individual voltage domains and provides SOC + implementations a ready to use framework to manage OPPs. + For more information, read <file:Documentation/power/opp.txt> + +config PM_CLK + def_bool y + depends on PM && HAVE_CLK + +config PM_GENERIC_DOMAINS + bool + depends on PM + +config WQ_POWER_EFFICIENT_DEFAULT + bool "Enable workqueue power-efficient mode by default" + depends on PM + default n + help + Per-cpu workqueues are generally preferred because they show + better performance thanks to cache locality; unfortunately, + per-cpu workqueues tend to be more power hungry than unbound + workqueues. + + Enabling workqueue.power_efficient kernel parameter makes the + per-cpu workqueues which were observed to contribute + significantly to power consumption unbound, leading to measurably + lower power usage at the cost of small performance overhead. + + This config option determines whether workqueue.power_efficient + is enabled by default. + + If in doubt, say N. + +config PM_GENERIC_DOMAINS_SLEEP + def_bool y + depends on PM_SLEEP && PM_GENERIC_DOMAINS + +config PM_GENERIC_DOMAINS_RUNTIME + def_bool y + depends on PM_RUNTIME && PM_GENERIC_DOMAINS + +config CPU_PM + bool + depends on SUSPEND || CPU_IDLE |