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  1 #
  2 # ACPI Configuration
  3 #
  5 menuconfig ACPI
  6         bool "ACPI (Advanced Configuration and Power Interface) Support"
  7         depends on !IA64_HP_SIM
  8         depends on IA64 || X86
  9         depends on PCI
 10         select PNP
 11         default y
 12         help
 13           Advanced Configuration and Power Interface (ACPI) support for 
 14           Linux requires an ACPI-compliant platform (hardware/firmware),
 15           and assumes the presence of OS-directed configuration and power
 16           management (OSPM) software.  This option will enlarge your 
 17           kernel by about 70K.
 19           Linux ACPI provides a robust functional replacement for several 
 20           legacy configuration and power management interfaces, including
 21           the Plug-and-Play BIOS specification (PnP BIOS), the 
 22           MultiProcessor Specification (MPS), and the Advanced Power 
 23           Management (APM) specification.  If both ACPI and APM support 
 24           are configured, ACPI is used.
 26           The project home page for the Linux ACPI subsystem is here:
 27           <>
 29           Linux support for ACPI is based on Intel Corporation's ACPI
 30           Component Architecture (ACPI CA).  For more information on the
 31           ACPI CA, see:
 32           <>
 34           ACPI is an open industry specification originally co-developed by
 35           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
 36           it is developed by the ACPI Specification Working Group (ASWG) under
 37           the UEFI Forum and any UEFI member can join the ASWG and contribute
 38           to the ACPI specification.
 39           The specification is available at:
 40           <>
 41           <>
 43 if ACPI
 46         bool
 49         bool
 51 config ACPI_SLEEP
 52         bool
 53         depends on SUSPEND || HIBERNATION
 54         default y
 57         bool "Deprecated power /proc/acpi directories"
 58         depends on PROC_FS
 59         help
 60           For backwards compatibility, this option allows
 61           deprecated power /proc/acpi/ directories to exist, even when
 62           they have been replaced by functions in /sys.
 63           The deprecated directories (and their replacements) include:
 64           /proc/acpi/battery/* (/sys/class/power_supply/*)
 65           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
 66           This option has no effect on /proc/acpi/ directories
 67           and functions, which do not yet exist in /sys
 68           This option, together with the proc directories, will be
 69           deleted in the future.
 71           Say N to delete power /proc/acpi/ directories that have moved to /sys/
 73 config ACPI_EC_DEBUGFS
 74         tristate "EC read/write access through /sys/kernel/debug/ec"
 75         default n
 76         help
 77           Say N to disable Embedded Controller /sys/kernel/debug interface
 79           Be aware that using this interface can confuse your Embedded
 80           Controller in a way that a normal reboot is not enough. You then
 81           have to power off your system, and remove the laptop battery for
 82           some seconds.
 83           An Embedded Controller typically is available on laptops and reads
 84           sensor values like battery state and temperature.
 85           The kernel accesses the EC through ACPI parsed code provided by BIOS
 86           tables. This option allows to access the EC directly without ACPI
 87           code being involved.
 88           Thus this option is a debug option that helps to write ACPI drivers
 89           and can be used to identify ACPI code or EC firmware bugs.
 91 config ACPI_AC
 92         tristate "AC Adapter"
 93         depends on X86
 94         select POWER_SUPPLY
 95         default y
 96         help
 97           This driver supports the AC Adapter object, which indicates
 98           whether a system is on AC or not.  If you have a system that can
 99           switch between A/C and battery, say Y.
101           To compile this driver as a module, choose M here:
102           the module will be called ac.
104 config ACPI_BATTERY
105         tristate "Battery"
106         depends on X86
107         select POWER_SUPPLY
108         default y
109         help
110           This driver adds support for battery information through
111           /proc/acpi/battery. If you have a mobile system with a battery, 
112           say Y.
114           To compile this driver as a module, choose M here:
115           the module will be called battery.
117 config ACPI_BUTTON
118         tristate "Button"
119         depends on INPUT
120         default y
121         help
122           This driver handles events on the power, sleep, and lid buttons.
123           A daemon reads events from input devices or via netlink and
124           performs user-defined actions such as shutting down the system.
125           This is necessary for software-controlled poweroff.
127           To compile this driver as a module, choose M here:
128           the module will be called button.
130 config ACPI_VIDEO
131         tristate "Video"
132         depends on X86 && BACKLIGHT_CLASS_DEVICE
133         depends on INPUT
134         select THERMAL
135         help
136           This driver implements the ACPI Extensions For Display Adapters
137           for integrated graphics devices on motherboard, as specified in
138           ACPI 2.0 Specification, Appendix B.  This supports basic operations
139           such as defining the video POST device, retrieving EDID information,
140           and setting up a video output.
142           To compile this driver as a module, choose M here:
143           the module will be called video.
145 config ACPI_FAN
146         tristate "Fan"
147         depends on THERMAL
148         default y
149         help
150           This driver supports ACPI fan devices, allowing user-mode
151           applications to perform basic fan control (on, off, status).
153           To compile this driver as a module, choose M here:
154           the module will be called fan.
156 config ACPI_DOCK
157         bool "Dock"
158         help
159           This driver supports ACPI-controlled docking stations and removable
160           drive bays such as the IBM Ultrabay and the Dell Module Bay.
163         tristate "Processor"
164         select THERMAL
165         select CPU_IDLE
166         default y
167         help
168           This driver installs ACPI as the idle handler for Linux and uses
169           ACPI C2 and C3 processor states to save power on systems that
170           support it.  It is required by several flavors of cpufreq
171           performance-state drivers.
173           To compile this driver as a module, choose M here:
174           the module will be called processor.
176 config ACPI_IPMI
177         tristate "IPMI"
178         depends on IPMI_SI
179         default n
180         help
181           This driver enables the ACPI to access the BMC controller. And it
182           uses the IPMI request/response message to communicate with BMC
183           controller, which can be found on on the server.
185           To compile this driver as a module, choose M here:
186           the module will be called as acpi_ipmi.
189         bool
190         depends on ACPI_PROCESSOR && HOTPLUG_CPU
191         select ACPI_CONTAINER
192         default y
195         tristate "Processor Aggregator"
196         depends on ACPI_PROCESSOR
197         depends on X86
198         help
199           ACPI 4.0 defines processor Aggregator, which enables OS to perform
200           specific processor configuration and control that applies to all
201           processors in the platform. Currently only logical processor idling
202           is defined, which is to reduce power consumption. This driver
203           supports the new device.
205 config ACPI_THERMAL
206         tristate "Thermal Zone"
207         depends on ACPI_PROCESSOR
208         select THERMAL
209         default y
210         help
211           This driver supports ACPI thermal zones.  Most mobile and
212           some desktop systems support ACPI thermal zones.  It is HIGHLY
213           recommended that this option be enabled, as your processor(s)
214           may be damaged without it.
216           To compile this driver as a module, choose M here:
217           the module will be called thermal.
219 config ACPI_NUMA
220         bool "NUMA support"
221         depends on NUMA
222         depends on (X86 || IA64)
223         default y if IA64_GENERIC || IA64_SGI_SN2
226         string "Custom DSDT Table file to include"
227         default ""
228         depends on !STANDALONE
229         help
230           This option supports a custom DSDT by linking it into the kernel.
231           See Documentation/acpi/dsdt-override.txt
233           Enter the full path name to the file which includes the AmlCode
234           declaration.
236           If unsure, don't enter a file name.
239         bool
240         default ACPI_CUSTOM_DSDT_FILE != ""
243         bool "ACPI tables override via initrd"
244         depends on BLK_DEV_INITRD && X86
245         default n
246         help
247           This option provides functionality to override arbitrary ACPI tables
248           via initrd. No functional change if no ACPI tables are passed via
249           initrd, therefore it's safe to say Y.
250           See Documentation/acpi/initrd_table_override.txt for details
252 config ACPI_DEBUG
253         bool "Debug Statements"
254         default n
255         help
256           The ACPI subsystem can produce debug output.  Saying Y enables this
257           output and increases the kernel size by around 50K.
259           Use the acpi.debug_layer and acpi.debug_level kernel command-line
260           parameters documented in Documentation/acpi/debug.txt and
261           Documentation/kernel-parameters.txt to control the type and
262           amount of debug output.
264 config ACPI_PCI_SLOT
265         bool "PCI slot detection driver"
266         depends on SYSFS
267         default n
268         help
269           This driver creates entries in /sys/bus/pci/slots/ for all PCI
270           slots in the system.  This can help correlate PCI bus addresses,
271           i.e., segment/bus/device/function tuples, with physical slots in
272           the system.  If you are unsure, say N.
274 config X86_PM_TIMER
275         bool "Power Management Timer Support" if EXPERT
276         depends on X86
277         default y
278         help
279           The Power Management Timer is available on all ACPI-capable,
280           in most cases even if ACPI is unusable or blacklisted.
282           This timing source is not affected by power management features
283           like aggressive processor idling, throttling, frequency and/or
284           voltage scaling, unlike the commonly used Time Stamp Counter
285           (TSC) timing source.
287           You should nearly always say Y here because many modern
288           systems require this timer. 
291         bool "Container and Module Devices"
293         help
294           This driver supports ACPI Container and Module devices (IDs
295           ACPI0004, PNP0A05, and PNP0A06).
297           This helps support hotplug of nodes, CPUs, and memory.
299           To compile this driver as a module, choose M here:
300           the module will be called container.
303         bool "Memory Hotplug"
304         depends on MEMORY_HOTPLUG
305         help
306           This driver supports ACPI memory hotplug.  The driver
307           fields notifications on ACPI memory devices (PNP0C80),
308           which represent memory ranges that may be onlined or
309           offlined during runtime.
311           If your hardware and firmware do not support adding or
312           removing memory devices at runtime, you need not enable
313           this driver.
315           To compile this driver as a module, choose M here:
316           the module will be called acpi_memhotplug.
318 config ACPI_SBS
319         tristate "Smart Battery System"
320         depends on X86
321         select POWER_SUPPLY
322         help
323           This driver supports the Smart Battery System, another
324           type of access to battery information, found on some laptops.
326           To compile this driver as a module, choose M here:
327           the modules will be called sbs and sbshc.
329 config ACPI_HED
330         tristate "Hardware Error Device"
331         help
332           This driver supports the Hardware Error Device (PNP0C33),
333           which is used to report some hardware errors notified via
334           SCI, mainly the corrected errors.
337         tristate "Allow ACPI methods to be inserted/replaced at run time"
338         depends on DEBUG_FS
339         default n
340         help
341           This debug facility allows ACPI AML methods to be inserted and/or
342           replaced without rebooting the system. For details refer to:
343           Documentation/acpi/method-customizing.txt.
345           NOTE: This option is security sensitive, because it allows arbitrary
346           kernel memory to be written to by root (uid=0) users, allowing them
347           to bypass certain security measures (e.g. if root is not allowed to
348           load additional kernel modules after boot, this feature may be used
349           to override that restriction).
351 config ACPI_BGRT
352         bool "Boottime Graphics Resource Table support"
353         depends on EFI && X86
354         help
355           This driver adds support for exposing the ACPI Boottime Graphics
356           Resource Table, which allows the operating system to obtain
357           data from the firmware boot splash. It will appear under
358           /sys/firmware/acpi/bgrt/ .
361         bool "Hardware-reduced ACPI support only" if EXPERT
362         def_bool n
363         depends on ACPI
364         help
365         This config item changes the way the ACPI code is built.  When this
366         option is selected, the kernel will use a specialized version of
367         ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
368         resulting kernel will be smaller but it will also be restricted to
369         running in ACPI reduced hardware mode ONLY.
371         If you are unsure what to do, do not enable this option.
373 source "drivers/acpi/apei/Kconfig"
375 config ACPI_EXTLOG
376         tristate "Extended Error Log support"
377         depends on X86_MCE && X86_LOCAL_APIC
378         select UEFI_CPER
379         select RAS
380         default n
381         help
382           Certain usages such as Predictive Failure Analysis (PFA) require
383           more information about the error than what can be described in
384           processor machine check banks. Most server processors log
385           additional information about the error in processor uncore
386           registers. Since the addresses and layout of these registers vary
387           widely from one processor to another, system software cannot
388           readily make use of them. To complicate matters further, some of
389           the additional error information cannot be constructed without
390           detailed knowledge about platform topology.
392           Enhanced MCA Logging allows firmware to provide additional error
393           information to system software, synchronous with MCE or CMCI. This
394           driver adds support for that functionality with corresponding
395           tracepoint which carries that information to userspace.
397 endif   # ACPI

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