Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 1 | config SUSPEND |
| 2 | bool "Suspend to RAM and standby" |
Rafael J. Wysocki | 1eb208a | 2011-02-11 00:06:30 +0100 | [diff] [blame] | 3 | depends on ARCH_SUSPEND_POSSIBLE |
Guenter Roeck | a4912d5 | 2016-03-03 10:33:40 -0800 | [diff] [blame] | 4 | select RTC_LIB |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 5 | default y |
| 6 | ---help--- |
| 7 | Allow the system to enter sleep states in which main memory is |
| 8 | powered and thus its contents are preserved, such as the |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 9 | suspend-to-RAM state (e.g. the ACPI S3 state). |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 10 | |
Johannes Berg | b28f508 | 2008-01-15 23:17:00 -0500 | [diff] [blame] | 11 | config SUSPEND_FREEZER |
| 12 | bool "Enable freezer for suspend to RAM/standby" \ |
| 13 | if ARCH_WANTS_FREEZER_CONTROL || BROKEN |
| 14 | depends on SUSPEND |
| 15 | default y |
| 16 | help |
| 17 | This allows you to turn off the freezer for suspend. If this is |
| 18 | done, no tasks are frozen for suspend to RAM/standby. |
| 19 | |
| 20 | Turning OFF this setting is NOT recommended! If in doubt, say Y. |
| 21 | |
Len Brown | 2fd77ff | 2015-07-31 12:46:17 -0400 | [diff] [blame] | 22 | config SUSPEND_SKIP_SYNC |
| 23 | bool "Skip kernel's sys_sync() on suspend to RAM/standby" |
| 24 | depends on SUSPEND |
| 25 | depends on EXPERT |
| 26 | help |
| 27 | Skip the kernel sys_sync() before freezing user processes. |
| 28 | Some systems prefer not to pay this cost on every invocation |
| 29 | of suspend, or they are content with invoking sync() from |
| 30 | user-space before invoking suspend. Say Y if that's your case. |
| 31 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 32 | config HIBERNATE_CALLBACKS |
| 33 | bool |
| 34 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 35 | config HIBERNATION |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 36 | bool "Hibernation (aka 'suspend to disk')" |
Rafael J. Wysocki | 1eb208a | 2011-02-11 00:06:30 +0100 | [diff] [blame] | 37 | depends on SWAP && ARCH_HIBERNATION_POSSIBLE |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 38 | select HIBERNATE_CALLBACKS |
Bojan Smojver | f996fc9 | 2010-09-09 23:06:23 +0200 | [diff] [blame] | 39 | select LZO_COMPRESS |
| 40 | select LZO_DECOMPRESS |
Bojan Smojver | 081a9d0 | 2011-10-13 23:58:07 +0200 | [diff] [blame] | 41 | select CRC32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | ---help--- |
David Brownell | a7ee2e5 | 2007-05-06 14:50:50 -0700 | [diff] [blame] | 43 | Enable the suspend to disk (STD) functionality, which is usually |
| 44 | called "hibernation" in user interfaces. STD checkpoints the |
| 45 | system and powers it off; and restores that checkpoint on reboot. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Pavel Machek | 23b168d | 2008-02-05 19:27:12 +0100 | [diff] [blame] | 47 | You can suspend your machine with 'echo disk > /sys/power/state' |
| 48 | after placing resume=/dev/swappartition on the kernel command line |
| 49 | in your bootloader's configuration file. |
| 50 | |
Rafael J. Wysocki | c7276fd | 2007-03-06 01:42:24 -0800 | [diff] [blame] | 51 | Alternatively, you can use the additional userland tools available |
| 52 | from <http://suspend.sf.net>. |
| 53 | |
| 54 | In principle it does not require ACPI or APM, although for example |
David Brownell | a7ee2e5 | 2007-05-06 14:50:50 -0700 | [diff] [blame] | 55 | ACPI will be used for the final steps when it is available. One |
| 56 | of the reasons to use software suspend is that the firmware hooks |
| 57 | for suspend states like suspend-to-RAM (STR) often don't work very |
| 58 | well with Linux. |
Rafael J. Wysocki | c7276fd | 2007-03-06 01:42:24 -0800 | [diff] [blame] | 59 | |
| 60 | It creates an image which is saved in your active swap. Upon the next |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | boot, pass the 'resume=/dev/swappartition' argument to the kernel to |
| 62 | have it detect the saved image, restore memory state from it, and |
| 63 | continue to run as before. If you do not want the previous state to |
Rafael J. Wysocki | c7276fd | 2007-03-06 01:42:24 -0800 | [diff] [blame] | 64 | be reloaded, then use the 'noresume' kernel command line argument. |
| 65 | Note, however, that fsck will be run on your filesystems and you will |
| 66 | need to run mkswap against the swap partition used for the suspend. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Rafael J. Wysocki | c7276fd | 2007-03-06 01:42:24 -0800 | [diff] [blame] | 68 | It also works with swap files to a limited extent (for details see |
| 69 | <file:Documentation/power/swsusp-and-swap-files.txt>). |
| 70 | |
| 71 | Right now you may boot without resuming and resume later but in the |
| 72 | meantime you cannot use the swap partition(s)/file(s) involved in |
| 73 | suspending. Also in this case you must not use the filesystems |
| 74 | that were mounted before the suspend. In particular, you MUST NOT |
| 75 | MOUNT any journaled filesystems mounted before the suspend or they |
| 76 | will get corrupted in a nasty way. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | For more information take a look at <file:Documentation/power/swsusp.txt>. |
| 79 | |
Martin Schwidefsky | 85055dd | 2011-08-17 20:42:24 +0200 | [diff] [blame] | 80 | config ARCH_SAVE_PAGE_KEYS |
| 81 | bool |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | config PM_STD_PARTITION |
| 84 | string "Default resume partition" |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 85 | depends on HIBERNATION |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | default "" |
| 87 | ---help--- |
| 88 | The default resume partition is the partition that the suspend- |
| 89 | to-disk implementation will look for a suspended disk image. |
| 90 | |
| 91 | The partition specified here will be different for almost every user. |
| 92 | It should be a valid swap partition (at least for now) that is turned |
| 93 | on before suspending. |
| 94 | |
| 95 | The partition specified can be overridden by specifying: |
| 96 | |
| 97 | resume=/dev/<other device> |
| 98 | |
| 99 | which will set the resume partition to the device specified. |
| 100 | |
| 101 | Note there is currently not a way to specify which device to save the |
| 102 | suspended image to. It will simply pick the first available swap |
| 103 | device. |
| 104 | |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 105 | config PM_SLEEP |
Jan Beulich | cf4fb80 | 2011-02-18 01:05:36 +0100 | [diff] [blame] | 106 | def_bool y |
Shriram Rajagopalan | d419e4c | 2011-04-11 22:54:48 +0200 | [diff] [blame] | 107 | depends on SUSPEND || HIBERNATE_CALLBACKS |
Rafael J. Wysocki | 464ed18 | 2014-12-19 15:37:54 +0100 | [diff] [blame] | 108 | select PM |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 109 | |
| 110 | config PM_SLEEP_SMP |
Jan Beulich | cf4fb80 | 2011-02-18 01:05:36 +0100 | [diff] [blame] | 111 | def_bool y |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 112 | depends on SMP |
| 113 | depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE |
| 114 | depends on PM_SLEEP |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 115 | select HOTPLUG_CPU |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 116 | |
Rafael J. Wysocki | 7483b4a | 2012-04-29 22:53:22 +0200 | [diff] [blame] | 117 | config PM_AUTOSLEEP |
| 118 | bool "Opportunistic sleep" |
| 119 | depends on PM_SLEEP |
| 120 | default n |
| 121 | ---help--- |
| 122 | Allow the kernel to trigger a system transition into a global sleep |
| 123 | state automatically whenever there are no active wakeup sources. |
| 124 | |
Rafael J. Wysocki | b86ff982 | 2012-04-29 22:53:42 +0200 | [diff] [blame] | 125 | config PM_WAKELOCKS |
| 126 | bool "User space wakeup sources interface" |
| 127 | depends on PM_SLEEP |
| 128 | default n |
| 129 | ---help--- |
| 130 | Allow user space to create, activate and deactivate wakeup source |
| 131 | objects with the help of a sysfs-based interface. |
| 132 | |
Rafael J. Wysocki | c73893e | 2012-05-05 21:57:20 +0200 | [diff] [blame] | 133 | config PM_WAKELOCKS_LIMIT |
| 134 | int "Maximum number of user space wakeup sources (0 = no limit)" |
| 135 | range 0 100000 |
| 136 | default 100 |
| 137 | depends on PM_WAKELOCKS |
| 138 | |
Rafael J. Wysocki | 4e585d2 | 2012-05-05 21:57:28 +0200 | [diff] [blame] | 139 | config PM_WAKELOCKS_GC |
| 140 | bool "Garbage collector for user space wakeup sources" |
| 141 | depends on PM_WAKELOCKS |
| 142 | default y |
| 143 | |
Rafael J. Wysocki | 464ed18 | 2014-12-19 15:37:54 +0100 | [diff] [blame] | 144 | config PM |
| 145 | bool "Device power management core functionality" |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 146 | ---help--- |
| 147 | Enable functionality allowing I/O devices to be put into energy-saving |
Rafael J. Wysocki | 464ed18 | 2014-12-19 15:37:54 +0100 | [diff] [blame] | 148 | (low power) states, for example after a specified period of inactivity |
| 149 | (autosuspended), and woken up in response to a hardware-generated |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 150 | wake-up event or a driver's request. |
| 151 | |
| 152 | Hardware support is generally required for this functionality to work |
| 153 | and the bus type drivers of the buses the devices are on are |
Rafael J. Wysocki | 464ed18 | 2014-12-19 15:37:54 +0100 | [diff] [blame] | 154 | responsible for the actual handling of device suspend requests and |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 155 | wake-up events. |
| 156 | |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 157 | config PM_DEBUG |
| 158 | bool "Power Management Debug Support" |
| 159 | depends on PM |
| 160 | ---help--- |
| 161 | This option enables various debugging support in the Power Management |
| 162 | code. This is helpful when debugging and reporting PM bugs, like |
| 163 | suspend support. |
| 164 | |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 165 | config PM_ADVANCED_DEBUG |
| 166 | bool "Extra PM attributes in sysfs for low-level debugging/testing" |
| 167 | depends on PM_DEBUG |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 168 | ---help--- |
| 169 | Add extra sysfs attributes allowing one to access some Power Management |
| 170 | fields of device objects from user space. If you are not a kernel |
| 171 | developer interested in debugging/testing Power Management, say "no". |
| 172 | |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 173 | config PM_TEST_SUSPEND |
| 174 | bool "Test suspend/resume and wakealarm during bootup" |
| 175 | depends on SUSPEND && PM_DEBUG && RTC_CLASS=y |
| 176 | ---help--- |
| 177 | This option will let you suspend your machine during bootup, and |
| 178 | make it wake up a few seconds later using an RTC wakeup alarm. |
| 179 | Enable this with a kernel parameter like "test_suspend=mem". |
| 180 | |
| 181 | You probably want to have your system's RTC driver statically |
| 182 | linked, ensuring that it's available when this test runs. |
| 183 | |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 184 | config PM_SLEEP_DEBUG |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 185 | def_bool y |
Rafael J. Wysocki | 88a6f33 | 2011-02-11 20:31:11 +0100 | [diff] [blame] | 186 | depends on PM_DEBUG && PM_SLEEP |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 187 | |
Benoit Goby | 70fea60 | 2013-10-17 10:48:46 -0700 | [diff] [blame] | 188 | config DPM_WATCHDOG |
| 189 | bool "Device suspend/resume watchdog" |
Chen Yu | 5b3f249 | 2016-08-19 12:37:23 +0800 | [diff] [blame] | 190 | depends on PM_DEBUG && PSTORE && EXPERT |
Benoit Goby | 70fea60 | 2013-10-17 10:48:46 -0700 | [diff] [blame] | 191 | ---help--- |
| 192 | Sets up a watchdog timer to capture drivers that are |
| 193 | locked up attempting to suspend/resume a device. |
| 194 | A detected lockup causes system panic with message |
| 195 | captured in pstore device for inspection in subsequent |
| 196 | boot session. |
| 197 | |
| 198 | config DPM_WATCHDOG_TIMEOUT |
| 199 | int "Watchdog timeout in seconds" |
| 200 | range 1 120 |
Chen Yu | 5b3f249 | 2016-08-19 12:37:23 +0800 | [diff] [blame] | 201 | default 120 |
Benoit Goby | 70fea60 | 2013-10-17 10:48:46 -0700 | [diff] [blame] | 202 | depends on DPM_WATCHDOG |
| 203 | |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 204 | config PM_TRACE |
| 205 | bool |
| 206 | help |
| 207 | This enables code to save the last PM event point across |
| 208 | reboot. The architecture needs to support this, x86 for |
| 209 | example does by saving things in the RTC, see below. |
| 210 | |
| 211 | The architecture specific code must provide the extern |
| 212 | functions from <linux/resume-trace.h> as well as the |
| 213 | <asm/resume-trace.h> header with a TRACE_RESUME() macro. |
| 214 | |
| 215 | The way the information is presented is architecture- |
| 216 | dependent, x86 will print the information during a |
| 217 | late_initcall. |
| 218 | |
| 219 | config PM_TRACE_RTC |
| 220 | bool "Suspend/resume event tracing" |
Rafael J. Wysocki | b2df1d4 | 2012-06-21 00:19:33 +0200 | [diff] [blame] | 221 | depends on PM_SLEEP_DEBUG |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 222 | depends on X86 |
| 223 | select PM_TRACE |
Rafael J. Wysocki | 196ec24 | 2011-02-11 00:06:42 +0100 | [diff] [blame] | 224 | ---help--- |
| 225 | This enables some cheesy code to save the last PM event point in the |
| 226 | RTC across reboots, so that you can debug a machine that just hangs |
| 227 | during suspend (or more commonly, during resume). |
| 228 | |
| 229 | To use this debugging feature you should attempt to suspend the |
| 230 | machine, reboot it and then run |
| 231 | |
| 232 | dmesg -s 1000000 | grep 'hash matches' |
| 233 | |
| 234 | CAUTION: this option will cause your machine's real-time clock to be |
| 235 | set to an invalid time after a resume. |
| 236 | |
Ralf Baechle | 7726942 | 2007-02-09 17:08:57 +0000 | [diff] [blame] | 237 | config APM_EMULATION |
| 238 | tristate "Advanced Power Management Emulation" |
Arnd Bergmann | 993e9fe | 2016-01-25 16:48:28 +0100 | [diff] [blame] | 239 | depends on SYS_SUPPORTS_APM_EMULATION |
Ralf Baechle | 7726942 | 2007-02-09 17:08:57 +0000 | [diff] [blame] | 240 | help |
| 241 | APM is a BIOS specification for saving power using several different |
| 242 | techniques. This is mostly useful for battery powered laptops with |
| 243 | APM compliant BIOSes. If you say Y here, the system time will be |
| 244 | reset after a RESUME operation, the /proc/apm device will provide |
| 245 | battery status information, and user-space programs will receive |
| 246 | notification of APM "events" (e.g. battery status change). |
| 247 | |
| 248 | In order to use APM, you will need supporting software. For location |
Michael Witten | 2dc98fd | 2011-07-08 21:11:16 +0000 | [diff] [blame] | 249 | and more information, read <file:Documentation/power/apm-acpi.txt> |
| 250 | and the Battery Powered Linux mini-HOWTO, available from |
Ralf Baechle | 7726942 | 2007-02-09 17:08:57 +0000 | [diff] [blame] | 251 | <http://www.tldp.org/docs.html#howto>. |
| 252 | |
| 253 | This driver does not spin down disk drives (see the hdparm(8) |
| 254 | manpage ("man 8 hdparm") for that), and it doesn't turn off |
| 255 | VESA-compliant "green" monitors. |
| 256 | |
| 257 | Generally, if you don't have a battery in your machine, there isn't |
| 258 | much point in using this driver and you should say N. If you get |
| 259 | random kernel OOPSes or reboots that don't seem to be related to |
| 260 | anything, try disabling/enabling this option (or disabling/enabling |
| 261 | APM in your BIOS). |
Rafael J. Wysocki | 5e928f7 | 2009-08-18 23:38:32 +0200 | [diff] [blame] | 262 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 263 | config PM_OPP |
Mark Brown | 049d595 | 2014-05-09 19:18:08 +0100 | [diff] [blame] | 264 | bool |
Pranith Kumar | 83fe27e | 2014-12-05 11:24:45 -0500 | [diff] [blame] | 265 | select SRCU |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 266 | ---help--- |
| 267 | SOCs have a standard set of tuples consisting of frequency and |
| 268 | voltage pairs that the device will support per voltage domain. This |
| 269 | is called Operating Performance Point or OPP. The actual definitions |
| 270 | of OPP varies over silicon within the same family of devices. |
| 271 | |
| 272 | OPP layer organizes the data internally using device pointers |
| 273 | representing individual voltage domains and provides SOC |
| 274 | implementations a ready to use framework to manage OPPs. |
| 275 | For more information, read <file:Documentation/power/opp.txt> |
Rafael J. Wysocki | 85eb8c8 | 2011-04-30 00:25:44 +0200 | [diff] [blame] | 276 | |
Rafael J. Wysocki | b7b9592 | 2011-07-01 22:13:37 +0200 | [diff] [blame] | 277 | config PM_CLK |
Rafael J. Wysocki | 85eb8c8 | 2011-04-30 00:25:44 +0200 | [diff] [blame] | 278 | def_bool y |
Rafael J. Wysocki | b7b9592 | 2011-07-01 22:13:37 +0200 | [diff] [blame] | 279 | depends on PM && HAVE_CLK |
Rafael J. Wysocki | f721889 | 2011-07-01 22:12:45 +0200 | [diff] [blame] | 280 | |
| 281 | config PM_GENERIC_DOMAINS |
| 282 | bool |
| 283 | depends on PM |
Rafael J. Wysocki | 17f2ae7 | 2011-08-14 13:34:31 +0200 | [diff] [blame] | 284 | |
Viresh Kumar | cee22a1 | 2013-04-08 16:45:40 +0530 | [diff] [blame] | 285 | config WQ_POWER_EFFICIENT_DEFAULT |
| 286 | bool "Enable workqueue power-efficient mode by default" |
| 287 | depends on PM |
| 288 | default n |
| 289 | help |
| 290 | Per-cpu workqueues are generally preferred because they show |
| 291 | better performance thanks to cache locality; unfortunately, |
| 292 | per-cpu workqueues tend to be more power hungry than unbound |
| 293 | workqueues. |
| 294 | |
| 295 | Enabling workqueue.power_efficient kernel parameter makes the |
| 296 | per-cpu workqueues which were observed to contribute |
| 297 | significantly to power consumption unbound, leading to measurably |
| 298 | lower power usage at the cost of small performance overhead. |
| 299 | |
| 300 | This config option determines whether workqueue.power_efficient |
| 301 | is enabled by default. |
| 302 | |
| 303 | If in doubt, say N. |
| 304 | |
Rafael J. Wysocki | 77f827d | 2012-08-06 01:39:57 +0200 | [diff] [blame] | 305 | config PM_GENERIC_DOMAINS_SLEEP |
| 306 | def_bool y |
| 307 | depends on PM_SLEEP && PM_GENERIC_DOMAINS |
| 308 | |
Tomasz Figa | aa42240 | 2014-09-19 20:27:36 +0200 | [diff] [blame] | 309 | config PM_GENERIC_DOMAINS_OF |
| 310 | def_bool y |
Tomasz Figa | a4a8c2c | 2014-09-19 20:27:43 +0200 | [diff] [blame] | 311 | depends on PM_GENERIC_DOMAINS && OF |
Tomasz Figa | aa42240 | 2014-09-19 20:27:36 +0200 | [diff] [blame] | 312 | |
Colin Cross | ab10023 | 2011-02-10 02:04:45 -0800 | [diff] [blame] | 313 | config CPU_PM |
| 314 | bool |