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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
 45 config ACPI_SLEEP
 46         bool
 47         depends on SUSPEND || HIBERNATION
 48         default y
 51         bool "Deprecated power /proc/acpi directories"
 52         depends on PROC_FS
 53         help
 54           For backwards compatibility, this option allows
 55           deprecated power /proc/acpi/ directories to exist, even when
 56           they have been replaced by functions in /sys.
 57           The deprecated directories (and their replacements) include:
 58           /proc/acpi/battery/* (/sys/class/power_supply/*)
 59           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
 60           This option has no effect on /proc/acpi/ directories
 61           and functions, which do not yet exist in /sys
 62           This option, together with the proc directories, will be
 63           deleted in the future.
 65           Say N to delete power /proc/acpi/ directories that have moved to /sys/
 67 config ACPI_EC_DEBUGFS
 68         tristate "EC read/write access through /sys/kernel/debug/ec"
 69         default n
 70         help
 71           Say N to disable Embedded Controller /sys/kernel/debug interface
 73           Be aware that using this interface can confuse your Embedded
 74           Controller in a way that a normal reboot is not enough. You then
 75           have to power off your system, and remove the laptop battery for
 76           some seconds.
 77           An Embedded Controller typically is available on laptops and reads
 78           sensor values like battery state and temperature.
 79           The kernel accesses the EC through ACPI parsed code provided by BIOS
 80           tables. This option allows to access the EC directly without ACPI
 81           code being involved.
 82           Thus this option is a debug option that helps to write ACPI drivers
 83           and can be used to identify ACPI code or EC firmware bugs.
 85 config ACPI_AC
 86         tristate "AC Adapter"
 87         depends on X86
 88         select POWER_SUPPLY
 89         default y
 90         help
 91           This driver supports the AC Adapter object, which indicates
 92           whether a system is on AC or not.  If you have a system that can
 93           switch between A/C and battery, say Y.
 95           To compile this driver as a module, choose M here:
 96           the module will be called ac.
 98 config ACPI_BATTERY
 99         tristate "Battery"
100         depends on X86
101         select POWER_SUPPLY
102         default y
103         help
104           This driver adds support for battery information through
105           /proc/acpi/battery. If you have a mobile system with a battery, 
106           say Y.
108           To compile this driver as a module, choose M here:
109           the module will be called battery.
111 config ACPI_BUTTON
112         tristate "Button"
113         depends on INPUT
114         default y
115         help
116           This driver handles events on the power, sleep, and lid buttons.
117           A daemon reads events from input devices or via netlink and
118           performs user-defined actions such as shutting down the system.
119           This is necessary for software-controlled poweroff.
121           To compile this driver as a module, choose M here:
122           the module will be called button.
124 config ACPI_VIDEO
125         tristate "Video"
126         depends on X86 && BACKLIGHT_CLASS_DEVICE
127         depends on INPUT
128         select THERMAL
129         help
130           This driver implements the ACPI Extensions For Display Adapters
131           for integrated graphics devices on motherboard, as specified in
132           ACPI 2.0 Specification, Appendix B.  This supports basic operations
133           such as defining the video POST device, retrieving EDID information,
134           and setting up a video output.
136           To compile this driver as a module, choose M here:
137           the module will be called video.
139 config ACPI_FAN
140         tristate "Fan"
141         select THERMAL
142         default y
143         help
144           This driver supports ACPI fan devices, allowing user-mode
145           applications to perform basic fan control (on, off, status).
147           To compile this driver as a module, choose M here:
148           the module will be called fan.
150 config ACPI_DOCK
151         bool "Dock"
152         help
153           This driver supports ACPI-controlled docking stations and removable
154           drive bays such as the IBM Ultrabay and the Dell Module Bay.
157         tristate "Processor"
158         select THERMAL
159         select CPU_IDLE
160         default y
161         help
162           This driver installs ACPI as the idle handler for Linux and uses
163           ACPI C2 and C3 processor states to save power on systems that
164           support it.  It is required by several flavors of cpufreq
165           performance-state drivers.
167           To compile this driver as a module, choose M here:
168           the module will be called processor.
170 config ACPI_IPMI
171         tristate "IPMI"
172         depends on IPMI_SI
173         default n
174         help
175           This driver enables the ACPI to access the BMC controller. And it
176           uses the IPMI request/response message to communicate with BMC
177           controller, which can be found on on the server.
179           To compile this driver as a module, choose M here:
180           the module will be called as acpi_ipmi.
183         bool
184         depends on ACPI_PROCESSOR && HOTPLUG_CPU
185         select ACPI_CONTAINER
186         default y
189         tristate "Processor Aggregator"
190         depends on ACPI_PROCESSOR
191         depends on X86
192         help
193           ACPI 4.0 defines processor Aggregator, which enables OS to perform
194           specific processor configuration and control that applies to all
195           processors in the platform. Currently only logical processor idling
196           is defined, which is to reduce power consumption. This driver
197           supports the new device.
199 config ACPI_THERMAL
200         tristate "Thermal Zone"
201         depends on ACPI_PROCESSOR
202         select THERMAL
203         default y
204         help
205           This driver supports ACPI thermal zones.  Most mobile and
206           some desktop systems support ACPI thermal zones.  It is HIGHLY
207           recommended that this option be enabled, as your processor(s)
208           may be damaged without it.
210           To compile this driver as a module, choose M here:
211           the module will be called thermal.
213 config ACPI_NUMA
214         bool "NUMA support"
215         depends on NUMA
216         depends on (X86 || IA64)
217         default y if IA64_GENERIC || IA64_SGI_SN2
220         string "Custom DSDT Table file to include"
221         default ""
222         depends on !STANDALONE
223         help
224           This option supports a custom DSDT by linking it into the kernel.
225           See Documentation/acpi/dsdt-override.txt
227           Enter the full path name to the file which includes the AmlCode
228           declaration.
230           If unsure, don't enter a file name.
233         bool
234         default ACPI_CUSTOM_DSDT_FILE != ""
237         bool "ACPI tables override via initrd"
238         depends on BLK_DEV_INITRD && X86
239         default n
240         help
241           This option provides functionality to override arbitrary ACPI tables
242           via initrd. No functional change if no ACPI tables are passed via
243           initrd, therefore it's safe to say Y.
244           See Documentation/acpi/initrd_table_override.txt for details
246 config ACPI_DEBUG
247         bool "Debug Statements"
248         default n
249         help
250           The ACPI subsystem can produce debug output.  Saying Y enables this
251           output and increases the kernel size by around 50K.
253           Use the acpi.debug_layer and acpi.debug_level kernel command-line
254           parameters documented in Documentation/acpi/debug.txt and
255           Documentation/kernel-parameters.txt to control the type and
256           amount of debug output.
258 config ACPI_PCI_SLOT
259         bool "PCI slot detection driver"
260         depends on SYSFS
261         default n
262         help
263           This driver creates entries in /sys/bus/pci/slots/ for all PCI
264           slots in the system.  This can help correlate PCI bus addresses,
265           i.e., segment/bus/device/function tuples, with physical slots in
266           the system.  If you are unsure, say N.
268 config X86_PM_TIMER
269         bool "Power Management Timer Support" if EXPERT
270         depends on X86
271         default y
272         help
273           The Power Management Timer is available on all ACPI-capable,
274           in most cases even if ACPI is unusable or blacklisted.
276           This timing source is not affected by power management features
277           like aggressive processor idling, throttling, frequency and/or
278           voltage scaling, unlike the commonly used Time Stamp Counter
279           (TSC) timing source.
281           You should nearly always say Y here because many modern
282           systems require this timer. 
285         bool "Container and Module Devices"
287         help
288           This driver supports ACPI Container and Module devices (IDs
289           ACPI0004, PNP0A05, and PNP0A06).
291           This helps support hotplug of nodes, CPUs, and memory.
293           To compile this driver as a module, choose M here:
294           the module will be called container.
297         bool "Memory Hotplug"
298         depends on MEMORY_HOTPLUG
299         help
300           This driver supports ACPI memory hotplug.  The driver
301           fields notifications on ACPI memory devices (PNP0C80),
302           which represent memory ranges that may be onlined or
303           offlined during runtime.
305           If your hardware and firmware do not support adding or
306           removing memory devices at runtime, you need not enable
307           this driver.
309           To compile this driver as a module, choose M here:
310           the module will be called acpi_memhotplug.
312 config ACPI_SBS
313         tristate "Smart Battery System"
314         depends on X86
315         select POWER_SUPPLY
316         help
317           This driver supports the Smart Battery System, another
318           type of access to battery information, found on some laptops.
320           To compile this driver as a module, choose M here:
321           the modules will be called sbs and sbshc.
323 config ACPI_HED
324         tristate "Hardware Error Device"
325         help
326           This driver supports the Hardware Error Device (PNP0C33),
327           which is used to report some hardware errors notified via
328           SCI, mainly the corrected errors.
331         tristate "Allow ACPI methods to be inserted/replaced at run time"
332         depends on DEBUG_FS
333         default n
334         help
335           This debug facility allows ACPI AML methods to be inserted and/or
336           replaced without rebooting the system. For details refer to:
337           Documentation/acpi/method-customizing.txt.
339           NOTE: This option is security sensitive, because it allows arbitrary
340           kernel memory to be written to by root (uid=0) users, allowing them
341           to bypass certain security measures (e.g. if root is not allowed to
342           load additional kernel modules after boot, this feature may be used
343           to override that restriction).
345 config ACPI_BGRT
346         bool "Boottime Graphics Resource Table support"
347         depends on EFI && X86
348         help
349           This driver adds support for exposing the ACPI Boottime Graphics
350           Resource Table, which allows the operating system to obtain
351           data from the firmware boot splash. It will appear under
352           /sys/firmware/acpi/bgrt/ .
355         bool "Hardware-reduced ACPI support only" if EXPERT
356         def_bool n
357         depends on ACPI
358         help
359         This config item changes the way the ACPI code is built.  When this
360         option is selected, the kernel will use a specialized version of
361         ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
362         resulting kernel will be smaller but it will also be restricted to
363         running in ACPI reduced hardware mode ONLY.
365         If you are unsure what to do, do not enable this option.
367 source "drivers/acpi/apei/Kconfig"
369 config ACPI_EXTLOG
370         tristate "Extended Error Log support"
371         depends on X86_MCE && X86_LOCAL_APIC
372         select UEFI_CPER
373         default n
374         help
375           Certain usages such as Predictive Failure Analysis (PFA) require
376           more information about the error than what can be described in
377           processor machine check banks. Most server processors log
378           additional information about the error in processor uncore
379           registers. Since the addresses and layout of these registers vary
380           widely from one processor to another, system software cannot
381           readily make use of them. To complicate matters further, some of
382           the additional error information cannot be constructed without
383           detailed knowledge about platform topology.
385           Enhanced MCA Logging allows firmware to provide additional error
386           information to system software, synchronous with MCE or CMCI. This
387           driver adds support for that functionality.
389 endif   # ACPI

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