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-rw-r--r--kernel/power/Kconfig253
1 files changed, 119 insertions, 134 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index ca6066a6952e..87f4d24b55b0 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -1,128 +1,12 @@
1config PM
2 bool "Power Management support"
3 depends on !IA64_HP_SIM
4 ---help---
5 "Power Management" means that parts of your computer are shut
6 off or put into a power conserving "sleep" mode if they are not
7 being used. There are two competing standards for doing this: APM
8 and ACPI. If you want to use either one, say Y here and then also
9 to the requisite support below.
10
11 Power Management is most important for battery powered laptop
12 computers; if you have a laptop, check out the Linux Laptop home
13 page on the WWW at <http://www.linux-on-laptops.com/> or
14 Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/>
15 and the Battery Powered Linux mini-HOWTO, available from
16 <http://www.tldp.org/docs.html#howto>.
17
18 Note that, even if you say N here, Linux on the x86 architecture
19 will issue the hlt instruction if nothing is to be done, thereby
20 sending the processor to sleep and saving power.
21
22config PM_DEBUG
23 bool "Power Management Debug Support"
24 depends on PM
25 ---help---
26 This option enables various debugging support in the Power Management
27 code. This is helpful when debugging and reporting PM bugs, like
28 suspend support.
29
30config PM_ADVANCED_DEBUG
31 bool "Extra PM attributes in sysfs for low-level debugging/testing"
32 depends on PM_DEBUG
33 default n
34 ---help---
35 Add extra sysfs attributes allowing one to access some Power Management
36 fields of device objects from user space. If you are not a kernel
37 developer interested in debugging/testing Power Management, say "no".
38
39config PM_VERBOSE
40 bool "Verbose Power Management debugging"
41 depends on PM_DEBUG
42 default n
43 ---help---
44 This option enables verbose messages from the Power Management code.
45
46config CAN_PM_TRACE
47 def_bool y
48 depends on PM_DEBUG && PM_SLEEP && EXPERIMENTAL
49
50config PM_TRACE
51 bool
52 help
53 This enables code to save the last PM event point across
54 reboot. The architecture needs to support this, x86 for
55 example does by saving things in the RTC, see below.
56
57 The architecture specific code must provide the extern
58 functions from <linux/resume-trace.h> as well as the
59 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
60
61 The way the information is presented is architecture-
62 dependent, x86 will print the information during a
63 late_initcall.
64
65config PM_TRACE_RTC
66 bool "Suspend/resume event tracing"
67 depends on CAN_PM_TRACE
68 depends on X86
69 select PM_TRACE
70 default n
71 ---help---
72 This enables some cheesy code to save the last PM event point in the
73 RTC across reboots, so that you can debug a machine that just hangs
74 during suspend (or more commonly, during resume).
75
76 To use this debugging feature you should attempt to suspend the
77 machine, reboot it and then run
78
79 dmesg -s 1000000 | grep 'hash matches'
80
81 CAUTION: this option will cause your machine's real-time clock to be
82 set to an invalid time after a resume.
83
84config PM_SLEEP_SMP
85 bool
86 depends on SMP
87 depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
88 depends on PM_SLEEP
89 select HOTPLUG_CPU
90 default y
91
92config PM_SLEEP
93 bool
94 depends on SUSPEND || HIBERNATION || XEN_SAVE_RESTORE
95 default y
96
97config PM_SLEEP_ADVANCED_DEBUG
98 bool
99 depends on PM_ADVANCED_DEBUG
100 default n
101
102config SUSPEND_NVS
103 bool
104
105config SUSPEND 1config SUSPEND
106 bool "Suspend to RAM and standby" 2 bool "Suspend to RAM and standby"
107 depends on PM && ARCH_SUSPEND_POSSIBLE 3 depends on ARCH_SUSPEND_POSSIBLE
108 select SUSPEND_NVS if HAS_IOMEM
109 default y 4 default y
110 ---help--- 5 ---help---
111 Allow the system to enter sleep states in which main memory is 6 Allow the system to enter sleep states in which main memory is
112 powered and thus its contents are preserved, such as the 7 powered and thus its contents are preserved, such as the
113 suspend-to-RAM state (e.g. the ACPI S3 state). 8 suspend-to-RAM state (e.g. the ACPI S3 state).
114 9
115config PM_TEST_SUSPEND
116 bool "Test suspend/resume and wakealarm during bootup"
117 depends on SUSPEND && PM_DEBUG && RTC_CLASS=y
118 ---help---
119 This option will let you suspend your machine during bootup, and
120 make it wake up a few seconds later using an RTC wakeup alarm.
121 Enable this with a kernel parameter like "test_suspend=mem".
122
123 You probably want to have your system's RTC driver statically
124 linked, ensuring that it's available when this test runs.
125
126config SUSPEND_FREEZER 10config SUSPEND_FREEZER
127 bool "Enable freezer for suspend to RAM/standby" \ 11 bool "Enable freezer for suspend to RAM/standby" \
128 if ARCH_WANTS_FREEZER_CONTROL || BROKEN 12 if ARCH_WANTS_FREEZER_CONTROL || BROKEN
@@ -134,10 +18,15 @@ config SUSPEND_FREEZER
134 18
135 Turning OFF this setting is NOT recommended! If in doubt, say Y. 19 Turning OFF this setting is NOT recommended! If in doubt, say Y.
136 20
21config HIBERNATE_CALLBACKS
22 bool
23
137config HIBERNATION 24config HIBERNATION
138 bool "Hibernation (aka 'suspend to disk')" 25 bool "Hibernation (aka 'suspend to disk')"
139 depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE 26 depends on SWAP && ARCH_HIBERNATION_POSSIBLE
140 select SUSPEND_NVS if HAS_IOMEM 27 select HIBERNATE_CALLBACKS
28 select LZO_COMPRESS
29 select LZO_DECOMPRESS
141 ---help--- 30 ---help---
142 Enable the suspend to disk (STD) functionality, which is usually 31 Enable the suspend to disk (STD) functionality, which is usually
143 called "hibernation" in user interfaces. STD checkpoints the 32 called "hibernation" in user interfaces. STD checkpoints the
@@ -198,6 +87,100 @@ config PM_STD_PARTITION
198 suspended image to. It will simply pick the first available swap 87 suspended image to. It will simply pick the first available swap
199 device. 88 device.
200 89
90config PM_SLEEP
91 def_bool y
92 depends on SUSPEND || HIBERNATE_CALLBACKS
93
94config PM_SLEEP_SMP
95 def_bool y
96 depends on SMP
97 depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
98 depends on PM_SLEEP
99 select HOTPLUG
100 select HOTPLUG_CPU
101
102config PM_RUNTIME
103 bool "Run-time PM core functionality"
104 depends on !IA64_HP_SIM
105 ---help---
106 Enable functionality allowing I/O devices to be put into energy-saving
107 (low power) states at run time (or autosuspended) after a specified
108 period of inactivity and woken up in response to a hardware-generated
109 wake-up event or a driver's request.
110
111 Hardware support is generally required for this functionality to work
112 and the bus type drivers of the buses the devices are on are
113 responsible for the actual handling of the autosuspend requests and
114 wake-up events.
115
116config PM
117 def_bool y
118 depends on PM_SLEEP || PM_RUNTIME
119
120config PM_DEBUG
121 bool "Power Management Debug Support"
122 depends on PM
123 ---help---
124 This option enables various debugging support in the Power Management
125 code. This is helpful when debugging and reporting PM bugs, like
126 suspend support.
127
128config PM_ADVANCED_DEBUG
129 bool "Extra PM attributes in sysfs for low-level debugging/testing"
130 depends on PM_DEBUG
131 ---help---
132 Add extra sysfs attributes allowing one to access some Power Management
133 fields of device objects from user space. If you are not a kernel
134 developer interested in debugging/testing Power Management, say "no".
135
136config PM_TEST_SUSPEND
137 bool "Test suspend/resume and wakealarm during bootup"
138 depends on SUSPEND && PM_DEBUG && RTC_CLASS=y
139 ---help---
140 This option will let you suspend your machine during bootup, and
141 make it wake up a few seconds later using an RTC wakeup alarm.
142 Enable this with a kernel parameter like "test_suspend=mem".
143
144 You probably want to have your system's RTC driver statically
145 linked, ensuring that it's available when this test runs.
146
147config CAN_PM_TRACE
148 def_bool y
149 depends on PM_DEBUG && PM_SLEEP
150
151config PM_TRACE
152 bool
153 help
154 This enables code to save the last PM event point across
155 reboot. The architecture needs to support this, x86 for
156 example does by saving things in the RTC, see below.
157
158 The architecture specific code must provide the extern
159 functions from <linux/resume-trace.h> as well as the
160 <asm/resume-trace.h> header with a TRACE_RESUME() macro.
161
162 The way the information is presented is architecture-
163 dependent, x86 will print the information during a
164 late_initcall.
165
166config PM_TRACE_RTC
167 bool "Suspend/resume event tracing"
168 depends on CAN_PM_TRACE
169 depends on X86
170 select PM_TRACE
171 ---help---
172 This enables some cheesy code to save the last PM event point in the
173 RTC across reboots, so that you can debug a machine that just hangs
174 during suspend (or more commonly, during resume).
175
176 To use this debugging feature you should attempt to suspend the
177 machine, reboot it and then run
178
179 dmesg -s 1000000 | grep 'hash matches'
180
181 CAUTION: this option will cause your machine's real-time clock to be
182 set to an invalid time after a resume.
183
201config APM_EMULATION 184config APM_EMULATION
202 tristate "Advanced Power Management Emulation" 185 tristate "Advanced Power Management Emulation"
203 depends on PM && SYS_SUPPORTS_APM_EMULATION 186 depends on PM && SYS_SUPPORTS_APM_EMULATION
@@ -224,21 +207,23 @@ config APM_EMULATION
224 anything, try disabling/enabling this option (or disabling/enabling 207 anything, try disabling/enabling this option (or disabling/enabling
225 APM in your BIOS). 208 APM in your BIOS).
226 209
227config PM_RUNTIME 210config ARCH_HAS_OPP
228 bool "Run-time PM core functionality" 211 bool
229 depends on PM 212
213config PM_OPP
214 bool "Operating Performance Point (OPP) Layer library"
215 depends on ARCH_HAS_OPP
230 ---help--- 216 ---help---
231 Enable functionality allowing I/O devices to be put into energy-saving 217 SOCs have a standard set of tuples consisting of frequency and
232 (low power) states at run time (or autosuspended) after a specified 218 voltage pairs that the device will support per voltage domain. This
233 period of inactivity and woken up in response to a hardware-generated 219 is called Operating Performance Point or OPP. The actual definitions
234 wake-up event or a driver's request. 220 of OPP varies over silicon within the same family of devices.
235 221
236 Hardware support is generally required for this functionality to work 222 OPP layer organizes the data internally using device pointers
237 and the bus type drivers of the buses the devices are on are 223 representing individual voltage domains and provides SOC
238 responsible for the actual handling of the autosuspend requests and 224 implementations a ready to use framework to manage OPPs.
239 wake-up events. 225 For more information, read <file:Documentation/power/opp.txt>
240 226
241config PM_OPS 227config PM_RUNTIME_CLK
242 bool 228 def_bool y
243 depends on PM_SLEEP || PM_RUNTIME 229 depends on PM_RUNTIME && HAVE_CLK
244 default y