1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds# 31da177e4SLinus Torvalds# ACPI Configuration 41da177e4SLinus Torvalds# 51da177e4SLinus Torvalds 6f5d707edSArnd Bergmannconfig ARCH_SUPPORTS_ACPI 7f5d707edSArnd Bergmann bool 8f5d707edSArnd Bergmann 93f2c48c9SJan Engelhardtmenuconfig ACPI 10355ee5ebSFrans Pop bool "ACPI (Advanced Configuration and Power Interface) Support" 112c870e61SArnd Bergmann depends on ARCH_SUPPORTS_ACPI 12243b66e7SLen Brown select PNP 132e61069bSSinan Kaya select NLS 1404662bacSRandy Dunlap select CRC32 152c870e61SArnd Bergmann default y if X86 161c48aa36SBjorn Helgaas help 171da177e4SLinus Torvalds Advanced Configuration and Power Interface (ACPI) support for 181c48aa36SBjorn Helgaas Linux requires an ACPI-compliant platform (hardware/firmware), 191da177e4SLinus Torvalds and assumes the presence of OS-directed configuration and power 201da177e4SLinus Torvalds management (OSPM) software. This option will enlarge your 211da177e4SLinus Torvalds kernel by about 70K. 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds Linux ACPI provides a robust functional replacement for several 241da177e4SLinus Torvalds legacy configuration and power management interfaces, including 251da177e4SLinus Torvalds the Plug-and-Play BIOS specification (PnP BIOS), the 261da177e4SLinus Torvalds MultiProcessor Specification (MPS), and the Advanced Power 271da177e4SLinus Torvalds Management (APM) specification. If both ACPI and APM support 281c48aa36SBjorn Helgaas are configured, ACPI is used. 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds Linux support for ACPI is based on Intel Corporation's ACPI 311c48aa36SBjorn Helgaas Component Architecture (ACPI CA). For more information on the 321c48aa36SBjorn Helgaas ACPI CA, see: 334ce77966SAlexander A. Klimov <https://acpica.org/> 341da177e4SLinus Torvalds 35c7f5220dSHanjun Guo ACPI is an open industry specification originally co-developed by 36c7f5220dSHanjun Guo Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, 37c7f5220dSHanjun Guo it is developed by the ACPI Specification Working Group (ASWG) under 38c7f5220dSHanjun Guo the UEFI Forum and any UEFI member can join the ASWG and contribute 39c7f5220dSHanjun Guo to the ACPI specification. 401c48aa36SBjorn Helgaas The specification is available at: 410585c1c0STiezhu Yang <https://uefi.org/specifications> 421da177e4SLinus Torvalds 433e11c3ceSLen Brownif ACPI 443e11c3ceSLen Brown 458a1664beSGraeme Gregoryconfig ACPI_LEGACY_TABLES_LOOKUP 468a1664beSGraeme Gregory bool 478a1664beSGraeme Gregory 4846ba51eaSHanjun Guoconfig ARCH_MIGHT_HAVE_ACPI_PDC 4946ba51eaSHanjun Guo bool 5046ba51eaSHanjun Guo 51d8f4f161SLorenzo Pieralisiconfig ACPI_GENERIC_GSI 52d8f4f161SLorenzo Pieralisi bool 53d8f4f161SLorenzo Pieralisi 546e0a0ea1SGraeme Gregoryconfig ACPI_SYSTEM_POWER_STATES_SUPPORT 556e0a0ea1SGraeme Gregory bool 566e0a0ea1SGraeme Gregory 57d0562674SSuthikulpanit, Suraveeconfig ACPI_CCA_REQUIRED 58d0562674SSuthikulpanit, Suravee bool 59d0562674SSuthikulpanit, Suravee 60f64bd790SDan Williamsconfig ACPI_TABLE_LIB 61f64bd790SDan Williams bool 62f64bd790SDan Williams 634d946f79SLv Zhengconfig ACPI_DEBUGGER 648cfb0cdfSLv Zheng bool "AML debugger interface" 654d946f79SLv Zheng select ACPI_DEBUG 664d946f79SLv Zheng help 67836d0830SLv Zheng Enable in-kernel debugging of AML facilities: statistics, 68836d0830SLv Zheng internal object dump, single step control method execution. 694d946f79SLv Zheng This is still under development, currently enabling this only 704d946f79SLv Zheng results in the compilation of the ACPICA debugger files. 714d946f79SLv Zheng 72836d0830SLv Zhengif ACPI_DEBUGGER 73836d0830SLv Zheng 74836d0830SLv Zhengconfig ACPI_DEBUGGER_USER 75c117dfffSMasanari Iida tristate "Userspace debugger accessibility" 76836d0830SLv Zheng depends on DEBUG_FS 77836d0830SLv Zheng help 78836d0830SLv Zheng Export /sys/kernel/debug/acpi/acpidbg for userspace utilities 79836d0830SLv Zheng to access the debugger functionalities. 80836d0830SLv Zheng 81836d0830SLv Zhengendif 82836d0830SLv Zheng 83ad1696f6SAleksey Makarovconfig ACPI_SPCR_TABLE 840231d000SPrarit Bhargava bool "ACPI Serial Port Console Redirection Support" 850231d000SPrarit Bhargava default y if X86 860231d000SPrarit Bhargava help 870231d000SPrarit Bhargava Enable support for Serial Port Console Redirection (SPCR) Table. 880231d000SPrarit Bhargava This table provides information about the configuration of the 890231d000SPrarit Bhargava earlycon console. 90ad1696f6SAleksey Makarov 91d1eb86e5SZhang Ruiconfig ACPI_FPDT 92d1eb86e5SZhang Rui bool "ACPI Firmware Performance Data Table (FPDT) support" 93c2465f95SJeremy Linton depends on X86_64 || ARM64 94d1eb86e5SZhang Rui help 95d1eb86e5SZhang Rui Enable support for the Firmware Performance Data Table (FPDT). 96d1eb86e5SZhang Rui This table provides information on the timing of the system 97d1eb86e5SZhang Rui boot, S3 suspend and S3 resume firmware code paths. 98d1eb86e5SZhang Rui 99eeb2d80dSSrinivas Pandruvadaconfig ACPI_LPIT 100eeb2d80dSSrinivas Pandruvada bool 101eeb2d80dSSrinivas Pandruvada depends on X86_64 102eeb2d80dSSrinivas Pandruvada default y 103eeb2d80dSSrinivas Pandruvada 104673d5b43SLen Brownconfig ACPI_SLEEP 105673d5b43SLen Brown bool 1065d1e072bSRafael J. Wysocki depends on SUSPEND || HIBERNATION 1076e0a0ea1SGraeme Gregory depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 108673d5b43SLen Brown default y 109673d5b43SLen Brown 11018d78b64SRafael J. Wysockiconfig ACPI_REV_OVERRIDE_POSSIBLE 1119165dabbSMasanari Iida bool "Allow supported ACPI revision to be overridden" 11218d78b64SRafael J. Wysocki depends on X86 11318d78b64SRafael J. Wysocki default y 11418d78b64SRafael J. Wysocki help 11518d78b64SRafael J. Wysocki The platform firmware on some systems expects Linux to return "5" as 11618d78b64SRafael J. Wysocki the supported ACPI revision which makes it expose system configuration 11718d78b64SRafael J. Wysocki information in a special way. 11818d78b64SRafael J. Wysocki 11918d78b64SRafael J. Wysocki For example, based on what ACPI exports as the supported revision, 12018d78b64SRafael J. Wysocki Dell XPS 13 (2015) configures its audio device to either work in HDA 12118d78b64SRafael J. Wysocki mode or in I2S mode, where the former is supposed to be used on Linux 12218d78b64SRafael J. Wysocki until the latter is fully supported (in the kernel as well as in user 12318d78b64SRafael J. Wysocki space). 12418d78b64SRafael J. Wysocki 12518d78b64SRafael J. Wysocki This option enables a DMI-based quirk for the above Dell machine (so 12618d78b64SRafael J. Wysocki that HDA audio is exposed by the platform firmware to the kernel) and 12718d78b64SRafael J. Wysocki makes it possible to force the kernel to return "5" as the supported 12818d78b64SRafael J. Wysocki ACPI revision via the "acpi_rev_override" command line switch. 12918d78b64SRafael J. Wysocki 1301195a098SThomas Renningerconfig ACPI_EC_DEBUGFS 1311195a098SThomas Renninger tristate "EC read/write access through /sys/kernel/debug/ec" 1321195a098SThomas Renninger help 1331195a098SThomas Renninger Say N to disable Embedded Controller /sys/kernel/debug interface 1341195a098SThomas Renninger 135500de3ddSThomas Renninger Be aware that using this interface can confuse your Embedded 136500de3ddSThomas Renninger Controller in a way that a normal reboot is not enough. You then 13725cb1bfdSAndrea Gelmini have to power off your system, and remove the laptop battery for 138500de3ddSThomas Renninger some seconds. 1391195a098SThomas Renninger An Embedded Controller typically is available on laptops and reads 1401195a098SThomas Renninger sensor values like battery state and temperature. 141500de3ddSThomas Renninger The kernel accesses the EC through ACPI parsed code provided by BIOS 142500de3ddSThomas Renninger tables. This option allows to access the EC directly without ACPI 143500de3ddSThomas Renninger code being involved. 1441195a098SThomas Renninger Thus this option is a debug option that helps to write ACPI drivers 1451195a098SThomas Renninger and can be used to identify ACPI code or EC firmware bugs. 1461195a098SThomas Renninger 1471da177e4SLinus Torvaldsconfig ACPI_AC 1481da177e4SLinus Torvalds tristate "AC Adapter" 1491b3d4c3bSZhang Rui select POWER_SUPPLY 15007fefe4cSLen Brown default y 1511da177e4SLinus Torvalds help 1521c48aa36SBjorn Helgaas This driver supports the AC Adapter object, which indicates 1531c48aa36SBjorn Helgaas whether a system is on AC or not. If you have a system that can 15407fefe4cSLen Brown switch between A/C and battery, say Y. 1551da177e4SLinus Torvalds 1561c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1571c48aa36SBjorn Helgaas the module will be called ac. 1581c48aa36SBjorn Helgaas 1591da177e4SLinus Torvaldsconfig ACPI_BATTERY 1601da177e4SLinus Torvalds tristate "Battery" 1611b3d4c3bSZhang Rui select POWER_SUPPLY 16207fefe4cSLen Brown default y 1631da177e4SLinus Torvalds help 1641da177e4SLinus Torvalds This driver adds support for battery information through 1651da177e4SLinus Torvalds /proc/acpi/battery. If you have a mobile system with a battery, 1661da177e4SLinus Torvalds say Y. 1671da177e4SLinus Torvalds 1681c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1691c48aa36SBjorn Helgaas the module will be called battery. 1701c48aa36SBjorn Helgaas 1711da177e4SLinus Torvaldsconfig ACPI_BUTTON 1721da177e4SLinus Torvalds tristate "Button" 173c0968f0eSDmitry Torokhov depends on INPUT 17407fefe4cSLen Brown default y 1751da177e4SLinus Torvalds help 1761c48aa36SBjorn Helgaas This driver handles events on the power, sleep, and lid buttons. 1777d13f94cSKrzysztof Mazur A daemon reads events from input devices or via netlink and 1787d13f94cSKrzysztof Mazur performs user-defined actions such as shutting down the system. 1797d13f94cSKrzysztof Mazur This is necessary for software-controlled poweroff. 1801c48aa36SBjorn Helgaas 1811c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1821c48aa36SBjorn Helgaas the module will be called button. 1831da177e4SLinus Torvalds 184a1b93e89SJosh Triplettconfig ACPI_TINY_POWER_BUTTON 185a1b93e89SJosh Triplett tristate "Tiny Power Button Driver" 186a1b93e89SJosh Triplett depends on !ACPI_BUTTON 187a1b93e89SJosh Triplett help 188a1b93e89SJosh Triplett This driver provides a tiny alternative to the ACPI Button driver. 189a1b93e89SJosh Triplett The tiny power button driver only handles the power button. Rather 190a1b93e89SJosh Triplett than notifying userspace via the input layer or a netlink event, this 191a1b93e89SJosh Triplett driver directly signals the init process to shut down. 192a1b93e89SJosh Triplett 193a1b93e89SJosh Triplett This driver is particularly suitable for cloud and VM environments, 194a1b93e89SJosh Triplett which use a simulated power button to initiate a controlled poweroff, 195a1b93e89SJosh Triplett but which may not want to run a separate userspace daemon to process 196a1b93e89SJosh Triplett input events. 197a1b93e89SJosh Triplett 198a1b93e89SJosh Triplettconfig ACPI_TINY_POWER_BUTTON_SIGNAL 199a1b93e89SJosh Triplett int "Tiny Power Button Signal" 200a1b93e89SJosh Triplett depends on ACPI_TINY_POWER_BUTTON 201a1b93e89SJosh Triplett default 38 202a1b93e89SJosh Triplett help 203a1b93e89SJosh Triplett Default signal to send to init in response to the power button. 204a1b93e89SJosh Triplett 205a1b93e89SJosh Triplett Likely values here include 38 (SIGRTMIN+4) to power off, or 2 206a1b93e89SJosh Triplett (SIGINT) to simulate Ctrl+Alt+Del. 207a1b93e89SJosh Triplett 2081da177e4SLinus Torvaldsconfig ACPI_VIDEO 2091da177e4SLinus Torvalds tristate "Video" 210038275d2SRiwen Lu depends on BACKLIGHT_CLASS_DEVICE 21103e2bf26SAndreas Herrmann depends on INPUT 212fe7aebb4SHans de Goede depends on ACPI_WMI || !X86 21363c4ec90SZhang Rui select THERMAL 2141da177e4SLinus Torvalds help 2151c48aa36SBjorn Helgaas This driver implements the ACPI Extensions For Display Adapters 2161da177e4SLinus Torvalds for integrated graphics devices on motherboard, as specified in 2171c48aa36SBjorn Helgaas ACPI 2.0 Specification, Appendix B. This supports basic operations 2181c48aa36SBjorn Helgaas such as defining the video POST device, retrieving EDID information, 2191c48aa36SBjorn Helgaas and setting up a video output. 2201c48aa36SBjorn Helgaas 2211c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2221c48aa36SBjorn Helgaas the module will be called video. 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvaldsconfig ACPI_FAN 2251da177e4SLinus Torvalds tristate "Fan" 226d8054749SZhang Rui depends on THERMAL 22707fefe4cSLen Brown default y 2281da177e4SLinus Torvalds help 2291c48aa36SBjorn Helgaas This driver supports ACPI fan devices, allowing user-mode 2301da177e4SLinus Torvalds applications to perform basic fan control (on, off, status). 2311da177e4SLinus Torvalds 2321c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2331c48aa36SBjorn Helgaas the module will be called fan. 2341c48aa36SBjorn Helgaas 23595c513ecSRafael J. Wysockiconfig ACPI_TAD 23695c513ecSRafael J. Wysocki tristate "ACPI Time and Alarm (TAD) Device Support" 23795c513ecSRafael J. Wysocki depends on SYSFS && PM_SLEEP 23895c513ecSRafael J. Wysocki help 23995c513ecSRafael J. Wysocki The ACPI Time and Alarm (TAD) device is an alternative to the Real 24095c513ecSRafael J. Wysocki Time Clock (RTC). Its wake timers allow the system to transition from 24195c513ecSRafael J. Wysocki the S3 (or optionally S4/S5) state to S0 state after a time period 24295c513ecSRafael J. Wysocki elapses. In comparison with the RTC Alarm, the TAD provides a larger 24395c513ecSRafael J. Wysocki scale of flexibility in the wake timers. The time capabilities of the 24495c513ecSRafael J. Wysocki TAD maintain the time of day information across platform power 24595c513ecSRafael J. Wysocki transitions, and keep track of time even when the platform is turned 24695c513ecSRafael J. Wysocki off. 24795c513ecSRafael J. Wysocki 248c8f7a62cSLen Brownconfig ACPI_DOCK 249898b054fSShaohua Li bool "Dock" 250c8f7a62cSLen Brown help 2511c48aa36SBjorn Helgaas This driver supports ACPI-controlled docking stations and removable 2521c48aa36SBjorn Helgaas drive bays such as the IBM Ultrabay and the Dell Module Bay. 25301b57e73SKristen Carlson Accardi 254239708a3SAshwin Chauguleconfig ACPI_CPU_FREQ_PSS 255239708a3SAshwin Chaugule bool 256239708a3SAshwin Chaugule 25735ae7133SSudeep Hollaconfig ACPI_PROCESSOR_CSTATE 25835ae7133SSudeep Holla def_bool y 259239ed06dSRafael J. Wysocki depends on ACPI_PROCESSOR 26035ae7133SSudeep Holla depends on IA64 || X86 26135ae7133SSudeep Holla 2625f05586cSAshwin Chauguleconfig ACPI_PROCESSOR_IDLE 2635f05586cSAshwin Chaugule bool 2645f05586cSAshwin Chaugule select CPU_IDLE 2655f05586cSAshwin Chaugule 266935c760eSTomasz Nowickiconfig ACPI_MCFG 267935c760eSTomasz Nowicki bool 268935c760eSTomasz Nowicki 269337aadffSAshwin Chauguleconfig ACPI_CPPC_LIB 270337aadffSAshwin Chaugule bool 271337aadffSAshwin Chaugule depends on ACPI_PROCESSOR 272337aadffSAshwin Chaugule select MAILBOX 273337aadffSAshwin Chaugule select PCC 274337aadffSAshwin Chaugule help 275337aadffSAshwin Chaugule If this option is enabled, this file implements common functionality 276337aadffSAshwin Chaugule to parse CPPC tables as described in the ACPI 5.1+ spec. The 277337aadffSAshwin Chaugule routines implemented are meant to be used by other 278337aadffSAshwin Chaugule drivers to control CPU performance using CPPC semantics. 279337aadffSAshwin Chaugule If your platform does not support CPPC in firmware, 280337aadffSAshwin Chaugule leave this option disabled. 281337aadffSAshwin Chaugule 2821da177e4SLinus Torvaldsconfig ACPI_PROCESSOR 2831da177e4SLinus Torvalds tristate "Processor" 284b1121e2aSHuacai Chen depends on X86 || IA64 || ARM64 || LOONGARCH 2858fc85c6aSSudeep Holla select ACPI_PROCESSOR_IDLE 286b1121e2aSHuacai Chen select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH 2877fdc74daSRiwen Lu select THERMAL 28807fefe4cSLen Brown default y 2891da177e4SLinus Torvalds help 290239708a3SAshwin Chaugule This driver adds support for the ACPI Processor package. It is required 291239708a3SAshwin Chaugule by several flavors of cpufreq performance-state, thermal, throttling and 292239708a3SAshwin Chaugule idle drivers. 2931c48aa36SBjorn Helgaas 2941c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2951c48aa36SBjorn Helgaas the module will be called processor. 2964b88e330SLv Zheng 297e92b297cSZhao Yakuiconfig ACPI_IPMI 298e92b297cSZhao Yakui tristate "IPMI" 29950121bebSSinan Kaya depends on IPMI_HANDLER 300e92b297cSZhao Yakui help 301e92b297cSZhao Yakui This driver enables the ACPI to access the BMC controller. And it 302e92b297cSZhao Yakui uses the IPMI request/response message to communicate with BMC 303a8ab8ef4STom Rix controller, which can be found on the server. 304e92b297cSZhao Yakui 305e92b297cSZhao Yakui To compile this driver as a module, choose M here: 306e92b297cSZhao Yakui the module will be called as acpi_ipmi. 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_CPU 309cbfc1baeSAdrian Bunk bool 310f756f28bSKees Cook depends on ACPI_PROCESSOR && HOTPLUG_CPU 3111da177e4SLinus Torvalds select ACPI_CONTAINER 312cbfc1baeSAdrian Bunk default y 3131da177e4SLinus Torvalds 3148e0af514SShaohua Liconfig ACPI_PROCESSOR_AGGREGATOR 3158e0af514SShaohua Li tristate "Processor Aggregator" 3168e0af514SShaohua Li depends on ACPI_PROCESSOR 317d91f79ebSLen Brown depends on X86 3188e0af514SShaohua Li help 3198e0af514SShaohua Li ACPI 4.0 defines processor Aggregator, which enables OS to perform 320c4c4e2a5SJiri Slaby specific processor configuration and control that applies to all 3218e0af514SShaohua Li processors in the platform. Currently only logical processor idling 3228e0af514SShaohua Li is defined, which is to reduce power consumption. This driver 323c4c4e2a5SJiri Slaby supports the new device. 3248e0af514SShaohua Li 3251da177e4SLinus Torvaldsconfig ACPI_THERMAL 3261da177e4SLinus Torvalds tristate "Thermal Zone" 3271da177e4SLinus Torvalds depends on ACPI_PROCESSOR 3283f655ef8SZhang Rui select THERMAL 32907fefe4cSLen Brown default y 3301da177e4SLinus Torvalds help 3311c48aa36SBjorn Helgaas This driver supports ACPI thermal zones. Most mobile and 3321da177e4SLinus Torvalds some desktop systems support ACPI thermal zones. It is HIGHLY 3331da177e4SLinus Torvalds recommended that this option be enabled, as your processor(s) 3341da177e4SLinus Torvalds may be damaged without it. 3351da177e4SLinus Torvalds 3361c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 3371c48aa36SBjorn Helgaas the module will be called thermal. 3381c48aa36SBjorn Helgaas 339a2ff95e0SMark Pearsonconfig ACPI_PLATFORM_PROFILE 34021f05a43SMaximilian Luz tristate 341a2ff95e0SMark Pearson 3427ce9573eSRandy Dunlapconfig ACPI_CUSTOM_DSDT_FILE 3437ce9573eSRandy Dunlap string "Custom DSDT Table file to include" 3447ce9573eSRandy Dunlap default "" 3451da177e4SLinus Torvalds depends on !STANDALONE 3461da177e4SLinus Torvalds help 347d89e9d6bSLen Brown This option supports a custom DSDT by linking it into the kernel. 348d89e9d6bSLen Brown 349c30fe7f7SUwe Zeisberger Enter the full path name to the file which includes the AmlCode 35082e4eb4eSWang Dongsheng or dsdt_aml_code declaration. 3511da177e4SLinus Torvalds 3527ce9573eSRandy Dunlap If unsure, don't enter a file name. 3537ce9573eSRandy Dunlap 3547ce9573eSRandy Dunlapconfig ACPI_CUSTOM_DSDT 3557ce9573eSRandy Dunlap bool 3567ce9573eSRandy Dunlap default ACPI_CUSTOM_DSDT_FILE != "" 3577ce9573eSRandy Dunlap 35891dda51aSAleksey Makarovconfig ARCH_HAS_ACPI_TABLE_UPGRADE 35991dda51aSAleksey Makarov def_bool n 36091dda51aSAleksey Makarov 3615d881327SLv Zhengconfig ACPI_TABLE_UPGRADE 3625d881327SLv Zheng bool "Allow upgrading ACPI tables via initrd" 36391dda51aSAleksey Makarov depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 3645d881327SLv Zheng default y 36553aac44cSThomas Renninger help 3665d881327SLv Zheng This option provides functionality to upgrade arbitrary ACPI tables 36753aac44cSThomas Renninger via initrd. No functional change if no ACPI tables are passed via 36853aac44cSThomas Renninger initrd, therefore it's safe to say Y. 369cb1aaebeSMauro Carvalho Chehab See Documentation/admin-guide/acpi/initrd_table_override.rst for details 37053aac44cSThomas Renninger 37198a455d9SShunyong Yangconfig ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD 37298a455d9SShunyong Yang bool "Override ACPI tables from built-in initrd" 37398a455d9SShunyong Yang depends on ACPI_TABLE_UPGRADE 374d2cbbf1fSRobert Richter depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION_NONE 37598a455d9SShunyong Yang help 37698a455d9SShunyong Yang This option provides functionality to override arbitrary ACPI tables 37798a455d9SShunyong Yang from built-in uncompressed initrd. 37898a455d9SShunyong Yang 379cb1aaebeSMauro Carvalho Chehab See Documentation/admin-guide/acpi/initrd_table_override.rst for details 38098a455d9SShunyong Yang 3811da177e4SLinus Torvaldsconfig ACPI_DEBUG 3821da177e4SLinus Torvalds bool "Debug Statements" 3831da177e4SLinus Torvalds help 384a0d84a92SBjorn Helgaas The ACPI subsystem can produce debug output. Saying Y enables this 385a0d84a92SBjorn Helgaas output and increases the kernel size by around 50K. 386a0d84a92SBjorn Helgaas 387a0d84a92SBjorn Helgaas Use the acpi.debug_layer and acpi.debug_level kernel command-line 388cb1aaebeSMauro Carvalho Chehab parameters documented in Documentation/firmware-guide/acpi/debug.rst and 3898c27ceffSMauro Carvalho Chehab Documentation/admin-guide/kernel-parameters.rst to control the type and 390a0d84a92SBjorn Helgaas amount of debug output. 3911da177e4SLinus Torvalds 3928344b568SAlex Chiangconfig ACPI_PCI_SLOT 393ab1a2e03SJiang Liu bool "PCI slot detection driver" 3945c6a1177SSinan Kaya depends on SYSFS && PCI 3958344b568SAlex Chiang help 3961c48aa36SBjorn Helgaas This driver creates entries in /sys/bus/pci/slots/ for all PCI 3971c48aa36SBjorn Helgaas slots in the system. This can help correlate PCI bus addresses, 3981c48aa36SBjorn Helgaas i.e., segment/bus/device/function tuples, with physical slots in 3991c48aa36SBjorn Helgaas the system. If you are unsure, say N. 4001c48aa36SBjorn Helgaas 4011da177e4SLinus Torvaldsconfig ACPI_CONTAINER 40206991c28SLinus Torvalds bool "Container and Module Devices" 403ea6a4581SPaul Bolle default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 4041c48aa36SBjorn Helgaas help 4051c48aa36SBjorn Helgaas This driver supports ACPI Container and Module devices (IDs 4061c48aa36SBjorn Helgaas ACPI0004, PNP0A05, and PNP0A06). 40745b1b196SKeiichiro Tokunaga 4081c48aa36SBjorn Helgaas This helps support hotplug of nodes, CPUs, and memory. 4091c48aa36SBjorn Helgaas 4101da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_MEMORY 4110a347644SRafael J. Wysocki bool "Memory Hotplug" 412bc02af93SYasunori Goto depends on MEMORY_HOTPLUG 4131da177e4SLinus Torvalds help 4141c48aa36SBjorn Helgaas This driver supports ACPI memory hotplug. The driver 4151c48aa36SBjorn Helgaas fields notifications on ACPI memory devices (PNP0C80), 4161c48aa36SBjorn Helgaas which represent memory ranges that may be onlined or 4171c48aa36SBjorn Helgaas offlined during runtime. 4181da177e4SLinus Torvalds 4191c48aa36SBjorn Helgaas If your hardware and firmware do not support adding or 4201c48aa36SBjorn Helgaas removing memory devices at runtime, you need not enable 4211c48aa36SBjorn Helgaas this driver. 4221da177e4SLinus Torvalds 423c183619bSJiang Liuconfig ACPI_HOTPLUG_IOAPIC 424c183619bSJiang Liu bool 425c183619bSJiang Liu depends on PCI 426c183619bSJiang Liu depends on X86_IO_APIC 427c183619bSJiang Liu default y 428c183619bSJiang Liu 4293f86b832SRich Townsendconfig ACPI_SBS 43094f6c086SAlexey Starikovskiy tristate "Smart Battery System" 431b4150fc4SVladimir Lebedev depends on X86 4321b3d4c3bSZhang Rui select POWER_SUPPLY 4333f86b832SRich Townsend help 4341c48aa36SBjorn Helgaas This driver supports the Smart Battery System, another 43594f6c086SAlexey Starikovskiy type of access to battery information, found on some laptops. 4363f86b832SRich Townsend 4371c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 4381c48aa36SBjorn Helgaas the modules will be called sbs and sbshc. 4391c48aa36SBjorn Helgaas 440801eab81SHuang Yingconfig ACPI_HED 441801eab81SHuang Ying tristate "Hardware Error Device" 442801eab81SHuang Ying help 443801eab81SHuang Ying This driver supports the Hardware Error Device (PNP0C33), 444801eab81SHuang Ying which is used to report some hardware errors notified via 445801eab81SHuang Ying SCI, mainly the corrected errors. 446801eab81SHuang Ying 447526b4af4SThomas Renningerconfig ACPI_CUSTOM_METHOD 448526b4af4SThomas Renninger tristate "Allow ACPI methods to be inserted/replaced at run time" 449526b4af4SThomas Renninger depends on DEBUG_FS 450526b4af4SThomas Renninger help 451bd1b2a55SJustin P. Mattock This debug facility allows ACPI AML methods to be inserted and/or 452526b4af4SThomas Renninger replaced without rebooting the system. For details refer to: 453cb1aaebeSMauro Carvalho Chehab Documentation/firmware-guide/acpi/method-customizing.rst. 454526b4af4SThomas Renninger 455526b4af4SThomas Renninger NOTE: This option is security sensitive, because it allows arbitrary 456526b4af4SThomas Renninger kernel memory to be written to by root (uid=0) users, allowing them 457526b4af4SThomas Renninger to bypass certain security measures (e.g. if root is not allowed to 458526b4af4SThomas Renninger load additional kernel modules after boot, this feature may be used 459526b4af4SThomas Renninger to override that restriction). 460526b4af4SThomas Renninger 461d1ff4b1cSMatthew Garrettconfig ACPI_BGRT 4622223af38SJosh Triplett bool "Boottime Graphics Resource Table support" 4636e7300cfSBhupesh Sharma depends on EFI && (X86 || ARM64) 464d1ff4b1cSMatthew Garrett help 465d1ff4b1cSMatthew Garrett This driver adds support for exposing the ACPI Boottime Graphics 466d1ff4b1cSMatthew Garrett Resource Table, which allows the operating system to obtain 467d1ff4b1cSMatthew Garrett data from the firmware boot splash. It will appear under 468d1ff4b1cSMatthew Garrett /sys/firmware/acpi/bgrt/ . 469d1ff4b1cSMatthew Garrett 470af1ae78aSAl Stoneconfig ACPI_REDUCED_HARDWARE_ONLY 471af1ae78aSAl Stone bool "Hardware-reduced ACPI support only" if EXPERT 472af1ae78aSAl Stone def_bool n 473af1ae78aSAl Stone help 474af1ae78aSAl Stone This config item changes the way the ACPI code is built. When this 475af1ae78aSAl Stone option is selected, the kernel will use a specialized version of 476af1ae78aSAl Stone ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 477af1ae78aSAl Stone resulting kernel will be smaller but it will also be restricted to 478af1ae78aSAl Stone running in ACPI reduced hardware mode ONLY. 479af1ae78aSAl Stone 480af1ae78aSAl Stone If you are unsure what to do, do not enable this option. 481af1ae78aSAl Stone 482bdf97013SDan Williamssource "drivers/acpi/nfit/Kconfig" 483c710fcc5SDan Williamssource "drivers/acpi/numa/Kconfig" 484a643ce20SHuang Yingsource "drivers/acpi/apei/Kconfig" 4856256ebd5SSrinivas Pandruvadasource "drivers/acpi/dptf/Kconfig" 486a643ce20SHuang Ying 487058dfc76SMika Westerbergconfig ACPI_WATCHDOG 488058dfc76SMika Westerberg bool 489058dfc76SMika Westerberg 4904b3db708SChen, Gongconfig ACPI_EXTLOG 4914b3db708SChen, Gong tristate "Extended Error Log support" 4929613916bSBorislav Petkov depends on X86_MCE && X86_LOCAL_APIC && EDAC 4937ea6c6c1SLuck, Tony select UEFI_CPER 4944b3db708SChen, Gong help 4954b3db708SChen, Gong Certain usages such as Predictive Failure Analysis (PFA) require 4964b3db708SChen, Gong more information about the error than what can be described in 4974b3db708SChen, Gong processor machine check banks. Most server processors log 4984b3db708SChen, Gong additional information about the error in processor uncore 4994b3db708SChen, Gong registers. Since the addresses and layout of these registers vary 5004b3db708SChen, Gong widely from one processor to another, system software cannot 5014b3db708SChen, Gong readily make use of them. To complicate matters further, some of 5024b3db708SChen, Gong the additional error information cannot be constructed without 5034b3db708SChen, Gong detailed knowledge about platform topology. 5044b3db708SChen, Gong 5054b3db708SChen, Gong Enhanced MCA Logging allows firmware to provide additional error 5064b3db708SChen, Gong information to system software, synchronous with MCE or CMCI. This 5072dfb7d51SChen, Gong driver adds support for that functionality with corresponding 5082dfb7d51SChen, Gong tracepoint which carries that information to userspace. 5094b3db708SChen, Gong 5104cf841e3STony Luckconfig ACPI_ADXL 5114cf841e3STony Luck bool 5124cf841e3STony Luck 5130bf54fcdSOctavian Purdilaconfig ACPI_CONFIGFS 5140bf54fcdSOctavian Purdila tristate "ACPI configfs support" 5150bf54fcdSOctavian Purdila select CONFIGFS_FS 5160bf54fcdSOctavian Purdila help 5170bf54fcdSOctavian Purdila Select this option to enable support for ACPI configuration from 5180bf54fcdSOctavian Purdila userspace. The configurable ACPI groups will be visible under 5190bf54fcdSOctavian Purdila /config/acpi, assuming configfs is mounted under /config. 5200bf54fcdSOctavian Purdila 5210db89fa2SChen Yuconfig ACPI_PFRUT 5220db89fa2SChen Yu tristate "ACPI Platform Firmware Runtime Update and Telemetry" 5230db89fa2SChen Yu depends on 64BIT 5240db89fa2SChen Yu help 5250db89fa2SChen Yu This mechanism allows certain pieces of the platform firmware 5260db89fa2SChen Yu to be updated on the fly while the system is running (runtime) 5270db89fa2SChen Yu without the need to restart it, which is key in the cases when 5280db89fa2SChen Yu the system needs to be available 100% of the time and it cannot 5290db89fa2SChen Yu afford the downtime related to restarting it, or when the work 5300db89fa2SChen Yu carried out by the system is particularly important, so it cannot 5310db89fa2SChen Yu be interrupted, and it is not practical to wait until it is complete. 5320db89fa2SChen Yu 5330db89fa2SChen Yu The existing firmware code can be modified (driver update) or 5340db89fa2SChen Yu extended by adding new code to the firmware (code injection). 5350db89fa2SChen Yu 536b0013e03SChen Yu Besides, the telemetry driver allows user space to fetch telemetry 537b0013e03SChen Yu data from the firmware with the help of the Platform Firmware Runtime 538b0013e03SChen Yu Telemetry interface. 539b0013e03SChen Yu 540b0013e03SChen Yu To compile the drivers as modules, choose M here: 541b0013e03SChen Yu the modules will be called pfr_update and pfr_telemetry. 5420db89fa2SChen Yu 54388ef16d8STomasz Nowickiif ARM64 54488ef16d8STomasz Nowickisource "drivers/acpi/arm64/Kconfig" 545f6f0c9a7SHuacai Chenendif 5460ce82232SJeremy Linton 5470ce82232SJeremy Lintonconfig ACPI_PPTT 5480ce82232SJeremy Linton bool 54988ef16d8STomasz Nowicki 55077e2a047SSudeep Hollaconfig ACPI_PCC 55177e2a047SSudeep Holla bool "ACPI PCC Address Space" 55277e2a047SSudeep Holla depends on PCC 55377e2a047SSudeep Holla default y 55477e2a047SSudeep Holla help 55577e2a047SSudeep Holla The PCC Address Space also referred as PCC Operation Region pertains 55677e2a047SSudeep Holla to the region of PCC subspace that succeeds the PCC signature. 55777e2a047SSudeep Holla 55877e2a047SSudeep Holla The PCC Operation Region works in conjunction with the PCC Table 55977e2a047SSudeep Holla (Platform Communications Channel Table). PCC subspaces that are 56077e2a047SSudeep Holla marked for use as PCC Operation Regions must not be used as PCC 56177e2a047SSudeep Holla subspaces for the standard ACPI features such as CPPC, RASF, PDTT and 56277e2a047SSudeep Holla MPST. These standard features must always use the PCC Table instead. 56377e2a047SSudeep Holla 56477e2a047SSudeep Holla Enable this feature if you want to set up and install the PCC Address 56577e2a047SSudeep Holla Space handler to handle PCC OpRegion in the firmware. 56677e2a047SSudeep Holla 567e81c782cSSudeep Hollaconfig ACPI_FFH 568e81c782cSSudeep Holla bool "ACPI FFH Address Space" 569e81c782cSSudeep Holla default n 570e81c782cSSudeep Holla help 571e81c782cSSudeep Holla The FFH(Fixed Function Hardware) Address Space also referred as FFH 572e81c782cSSudeep Holla Operation Region allows to define platform specific opregion. 573e81c782cSSudeep Holla 574e81c782cSSudeep Holla Enable this feature if you want to set up and install the FFH Address 575e81c782cSSudeep Holla Space handler to handle FFH OpRegion in the firmware. 576e81c782cSSudeep Holla 577fa870509SAndy Shevchenkosource "drivers/acpi/pmic/Kconfig" 578fa870509SAndy Shevchenko 5793cf48554SJean-Philippe Bruckerconfig ACPI_VIOT 5803cf48554SJean-Philippe Brucker bool 5813cf48554SJean-Philippe Brucker 582e3435fffSSudeep Hollaconfig ACPI_PRMT 583e3435fffSSudeep Holla bool "Platform Runtime Mechanism Support" 584*5894cf57SArd Biesheuvel depends on EFI_RUNTIME_WRAPPERS && (X86_64 || ARM64) 585e3435fffSSudeep Holla default y 586e3435fffSSudeep Holla help 587e3435fffSSudeep Holla Platform Runtime Mechanism (PRM) is a firmware interface exposing a 588e3435fffSSudeep Holla set of binary executables that can be called from the AML interpreter 589e3435fffSSudeep Holla or directly from device drivers. 590e3435fffSSudeep Holla 591e3435fffSSudeep Holla Say Y to enable the AML interpreter to execute the PRM code. 592e3435fffSSudeep Holla 593e3435fffSSudeep Holla While this feature is optional in principle, leaving it out may 594e3435fffSSudeep Holla substantially increase computational overhead related to the 595e3435fffSSudeep Holla initialization of some server systems. 596e3435fffSSudeep Holla 5971da177e4SLinus Torvaldsendif # ACPI 59887e65d05SJan Kiszka 59987e65d05SJan Kiszkaconfig X86_PM_TIMER 60087e65d05SJan Kiszka bool "Power Management Timer Support" if EXPERT 60187e65d05SJan Kiszka depends on X86 && (ACPI || JAILHOUSE_GUEST) 60287e65d05SJan Kiszka default y 60387e65d05SJan Kiszka help 60487e65d05SJan Kiszka The Power Management Timer is available on all ACPI-capable, 60587e65d05SJan Kiszka in most cases even if ACPI is unusable or blacklisted. 60687e65d05SJan Kiszka 60787e65d05SJan Kiszka This timing source is not affected by power management features 60887e65d05SJan Kiszka like aggressive processor idling, throttling, frequency and/or 60987e65d05SJan Kiszka voltage scaling, unlike the commonly used Time Stamp Counter 61087e65d05SJan Kiszka (TSC) timing source. 61187e65d05SJan Kiszka 61287e65d05SJan Kiszka You should nearly always say Y here because many modern 61387e65d05SJan Kiszka systems require this timer. 614