6 bool "ACPI (Advanced Configuration and Power Interface) Support"
7 depends on !IA64_HP_SIM
8 depends on IA64 || X86 || (ARM64 && EXPERT)
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
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 <https://01.org/linux-acpi>
29 Linux support for ACPI is based on Intel Corporation's ACPI
30 Component Architecture (ACPI CA). For more information on the
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 <http://www.acpi.info>
41 <http://www.uefi.org/acpi/specs>
45 config ACPI_LEGACY_TABLES_LOOKUP
48 config ARCH_MIGHT_HAVE_ACPI_PDC
51 config ACPI_GENERIC_GSI
54 config ACPI_SYSTEM_POWER_STATES_SUPPORT
57 config ACPI_CCA_REQUIRED
61 bool "In-kernel debugger (EXPERIMENTAL)"
64 Enable in-kernel debugging facilities: statistics, internal
65 object dump, single step control method execution.
66 This is still under development, currently enabling this only
67 results in the compilation of the ACPICA debugger files.
71 depends on SUSPEND || HIBERNATION
72 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
75 config ACPI_PROCFS_POWER
76 bool "Deprecated power /proc/acpi directories"
77 depends on X86 && PROC_FS
79 For backwards compatibility, this option allows
80 deprecated power /proc/acpi/ directories to exist, even when
81 they have been replaced by functions in /sys.
82 The deprecated directories (and their replacements) include:
83 /proc/acpi/battery/* (/sys/class/power_supply/*)
84 /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
85 This option has no effect on /proc/acpi/ directories
86 and functions, which do not yet exist in /sys
87 This option, together with the proc directories, will be
88 deleted in the future.
90 Say N to delete power /proc/acpi/ directories that have moved to /sys/
92 config ACPI_REV_OVERRIDE_POSSIBLE
93 bool "Allow supported ACPI revision to be overriden"
97 The platform firmware on some systems expects Linux to return "5" as
98 the supported ACPI revision which makes it expose system configuration
99 information in a special way.
101 For example, based on what ACPI exports as the supported revision,
102 Dell XPS 13 (2015) configures its audio device to either work in HDA
103 mode or in I2S mode, where the former is supposed to be used on Linux
104 until the latter is fully supported (in the kernel as well as in user
107 This option enables a DMI-based quirk for the above Dell machine (so
108 that HDA audio is exposed by the platform firmware to the kernel) and
109 makes it possible to force the kernel to return "5" as the supported
110 ACPI revision via the "acpi_rev_override" command line switch.
112 config ACPI_EC_DEBUGFS
113 tristate "EC read/write access through /sys/kernel/debug/ec"
116 Say N to disable Embedded Controller /sys/kernel/debug interface
118 Be aware that using this interface can confuse your Embedded
119 Controller in a way that a normal reboot is not enough. You then
120 have to power off your system, and remove the laptop battery for
122 An Embedded Controller typically is available on laptops and reads
123 sensor values like battery state and temperature.
124 The kernel accesses the EC through ACPI parsed code provided by BIOS
125 tables. This option allows to access the EC directly without ACPI
127 Thus this option is a debug option that helps to write ACPI drivers
128 and can be used to identify ACPI code or EC firmware bugs.
131 tristate "AC Adapter"
136 This driver supports the AC Adapter object, which indicates
137 whether a system is on AC or not. If you have a system that can
138 switch between A/C and battery, say Y.
140 To compile this driver as a module, choose M here:
141 the module will be called ac.
149 This driver adds support for battery information through
150 /proc/acpi/battery. If you have a mobile system with a battery,
153 To compile this driver as a module, choose M here:
154 the module will be called battery.
161 This driver handles events on the power, sleep, and lid buttons.
162 A daemon reads events from input devices or via netlink and
163 performs user-defined actions such as shutting down the system.
164 This is necessary for software-controlled poweroff.
166 To compile this driver as a module, choose M here:
167 the module will be called button.
171 depends on X86 && BACKLIGHT_CLASS_DEVICE
175 This driver implements the ACPI Extensions For Display Adapters
176 for integrated graphics devices on motherboard, as specified in
177 ACPI 2.0 Specification, Appendix B. This supports basic operations
178 such as defining the video POST device, retrieving EDID information,
179 and setting up a video output.
181 To compile this driver as a module, choose M here:
182 the module will be called video.
189 This driver supports ACPI fan devices, allowing user-mode
190 applications to perform basic fan control (on, off, status).
192 To compile this driver as a module, choose M here:
193 the module will be called fan.
198 This driver supports ACPI-controlled docking stations and removable
199 drive bays such as the IBM Ultrabay and the Dell Module Bay.
201 config ACPI_CPU_FREQ_PSS
205 config ACPI_PROCESSOR_IDLE
209 config ACPI_PROCESSOR
211 depends on X86 || IA64
212 select ACPI_PROCESSOR_IDLE
213 select ACPI_CPU_FREQ_PSS
216 This driver adds support for the ACPI Processor package. It is required
217 by several flavors of cpufreq performance-state, thermal, throttling and
220 To compile this driver as a module, choose M here:
221 the module will be called processor.
228 This driver enables the ACPI to access the BMC controller. And it
229 uses the IPMI request/response message to communicate with BMC
230 controller, which can be found on on the server.
232 To compile this driver as a module, choose M here:
233 the module will be called as acpi_ipmi.
235 config ACPI_HOTPLUG_CPU
237 depends on ACPI_PROCESSOR && HOTPLUG_CPU
238 select ACPI_CONTAINER
241 config ACPI_PROCESSOR_AGGREGATOR
242 tristate "Processor Aggregator"
243 depends on ACPI_PROCESSOR
246 ACPI 4.0 defines processor Aggregator, which enables OS to perform
247 specific processor configuration and control that applies to all
248 processors in the platform. Currently only logical processor idling
249 is defined, which is to reduce power consumption. This driver
250 supports the new device.
253 tristate "Thermal Zone"
254 depends on ACPI_PROCESSOR
258 This driver supports ACPI thermal zones. Most mobile and
259 some desktop systems support ACPI thermal zones. It is HIGHLY
260 recommended that this option be enabled, as your processor(s)
261 may be damaged without it.
263 To compile this driver as a module, choose M here:
264 the module will be called thermal.
269 depends on (X86 || IA64)
270 default y if IA64_GENERIC || IA64_SGI_SN2
272 config ACPI_CUSTOM_DSDT_FILE
273 string "Custom DSDT Table file to include"
275 depends on !STANDALONE
277 This option supports a custom DSDT by linking it into the kernel.
278 See Documentation/acpi/dsdt-override.txt
280 Enter the full path name to the file which includes the AmlCode
283 If unsure, don't enter a file name.
285 config ACPI_CUSTOM_DSDT
287 default ACPI_CUSTOM_DSDT_FILE != ""
289 config ACPI_INITRD_TABLE_OVERRIDE
290 bool "ACPI tables override via initrd"
291 depends on BLK_DEV_INITRD && X86
294 This option provides functionality to override arbitrary ACPI tables
295 via initrd. No functional change if no ACPI tables are passed via
296 initrd, therefore it's safe to say Y.
297 See Documentation/acpi/initrd_table_override.txt for details
300 bool "Debug Statements"
303 The ACPI subsystem can produce debug output. Saying Y enables this
304 output and increases the kernel size by around 50K.
306 Use the acpi.debug_layer and acpi.debug_level kernel command-line
307 parameters documented in Documentation/acpi/debug.txt and
308 Documentation/kernel-parameters.txt to control the type and
309 amount of debug output.
312 bool "PCI slot detection driver"
316 This driver creates entries in /sys/bus/pci/slots/ for all PCI
317 slots in the system. This can help correlate PCI bus addresses,
318 i.e., segment/bus/device/function tuples, with physical slots in
319 the system. If you are unsure, say N.
322 bool "Power Management Timer Support" if EXPERT
326 The Power Management Timer is available on all ACPI-capable,
327 in most cases even if ACPI is unusable or blacklisted.
329 This timing source is not affected by power management features
330 like aggressive processor idling, throttling, frequency and/or
331 voltage scaling, unlike the commonly used Time Stamp Counter
334 You should nearly always say Y here because many modern
335 systems require this timer.
337 config ACPI_CONTAINER
338 bool "Container and Module Devices"
339 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
341 This driver supports ACPI Container and Module devices (IDs
342 ACPI0004, PNP0A05, and PNP0A06).
344 This helps support hotplug of nodes, CPUs, and memory.
346 To compile this driver as a module, choose M here:
347 the module will be called container.
349 config ACPI_HOTPLUG_MEMORY
350 bool "Memory Hotplug"
351 depends on MEMORY_HOTPLUG
353 This driver supports ACPI memory hotplug. The driver
354 fields notifications on ACPI memory devices (PNP0C80),
355 which represent memory ranges that may be onlined or
356 offlined during runtime.
358 If your hardware and firmware do not support adding or
359 removing memory devices at runtime, you need not enable
362 To compile this driver as a module, choose M here:
363 the module will be called acpi_memhotplug.
365 config ACPI_HOTPLUG_IOAPIC
368 depends on X86_IO_APIC
372 tristate "Smart Battery System"
376 This driver supports the Smart Battery System, another
377 type of access to battery information, found on some laptops.
379 To compile this driver as a module, choose M here:
380 the modules will be called sbs and sbshc.
383 tristate "Hardware Error Device"
385 This driver supports the Hardware Error Device (PNP0C33),
386 which is used to report some hardware errors notified via
387 SCI, mainly the corrected errors.
389 config ACPI_CUSTOM_METHOD
390 tristate "Allow ACPI methods to be inserted/replaced at run time"
394 This debug facility allows ACPI AML methods to be inserted and/or
395 replaced without rebooting the system. For details refer to:
396 Documentation/acpi/method-customizing.txt.
398 NOTE: This option is security sensitive, because it allows arbitrary
399 kernel memory to be written to by root (uid=0) users, allowing them
400 to bypass certain security measures (e.g. if root is not allowed to
401 load additional kernel modules after boot, this feature may be used
402 to override that restriction).
405 bool "Boottime Graphics Resource Table support"
406 depends on EFI && X86
408 This driver adds support for exposing the ACPI Boottime Graphics
409 Resource Table, which allows the operating system to obtain
410 data from the firmware boot splash. It will appear under
411 /sys/firmware/acpi/bgrt/ .
413 config ACPI_REDUCED_HARDWARE_ONLY
414 bool "Hardware-reduced ACPI support only" if EXPERT
417 This config item changes the way the ACPI code is built. When this
418 option is selected, the kernel will use a specialized version of
419 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The
420 resulting kernel will be smaller but it will also be restricted to
421 running in ACPI reduced hardware mode ONLY.
423 If you are unsure what to do, do not enable this option.
426 tristate "ACPI NVDIMM Firmware Interface Table (NFIT)"
427 depends on PHYS_ADDR_T_64BIT
429 depends on ARCH_HAS_MMIO_FLUSH
432 Infrastructure to probe ACPI 6 compliant platforms for
433 NVDIMMs (NFIT) and register a libnvdimm device tree. In
434 addition to storage devices this also enables libnvdimm to pass
435 ACPI._DSM messages for platform/dimm configuration.
437 To compile this driver as a module, choose M here:
438 the module will be called nfit.
440 config ACPI_NFIT_DEBUG
441 bool "NFIT DSM debug"
443 depends on DYNAMIC_DEBUG
446 Enabling this option causes the nfit driver to dump the
447 input and output buffers of _DSM operations on the ACPI0012
448 device and its children. This can be very verbose, so leave
449 it disabled unless you are debugging a hardware / firmware
452 source "drivers/acpi/apei/Kconfig"
455 tristate "Extended Error Log support"
456 depends on X86_MCE && X86_LOCAL_APIC
461 Certain usages such as Predictive Failure Analysis (PFA) require
462 more information about the error than what can be described in
463 processor machine check banks. Most server processors log
464 additional information about the error in processor uncore
465 registers. Since the addresses and layout of these registers vary
466 widely from one processor to another, system software cannot
467 readily make use of them. To complicate matters further, some of
468 the additional error information cannot be constructed without
469 detailed knowledge about platform topology.
471 Enhanced MCA Logging allows firmware to provide additional error
472 information to system software, synchronous with MCE or CMCI. This
473 driver adds support for that functionality with corresponding
474 tracepoint which carries that information to userspace.
476 menuconfig PMIC_OPREGION
477 bool "PMIC (Power Management Integrated Circuit) operation region support"
479 Select this option to enable support for ACPI operation
480 region of the PMIC chip. The operation region can be used
481 to control power rails and sensor reading/writing on the
485 config CRC_PMIC_OPREGION
486 bool "ACPI operation region support for CrystalCove PMIC"
487 depends on INTEL_SOC_PMIC
489 This config adds ACPI operation region support for CrystalCove PMIC.
491 config XPOWER_PMIC_OPREGION
492 bool "ACPI operation region support for XPower AXP288 PMIC"
493 depends on AXP288_ADC = y
495 This config adds ACPI operation region support for XPower AXP288 PMIC.