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 301c48aa36SBjorn Helgaas The project home page for the Linux ACPI subsystem is here: 31aaf3d29fSRafael J. Wysocki <https://01.org/linux-acpi> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds Linux support for ACPI is based on Intel Corporation's ACPI 341c48aa36SBjorn Helgaas Component Architecture (ACPI CA). For more information on the 351c48aa36SBjorn Helgaas ACPI CA, see: 364ce77966SAlexander A. Klimov <https://acpica.org/> 371da177e4SLinus Torvalds 38c7f5220dSHanjun Guo ACPI is an open industry specification originally co-developed by 39c7f5220dSHanjun Guo Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, 40c7f5220dSHanjun Guo it is developed by the ACPI Specification Working Group (ASWG) under 41c7f5220dSHanjun Guo the UEFI Forum and any UEFI member can join the ASWG and contribute 42c7f5220dSHanjun Guo to the ACPI specification. 431c48aa36SBjorn Helgaas The specification is available at: 440585c1c0STiezhu Yang <https://uefi.org/specifications> 451da177e4SLinus Torvalds 463e11c3ceSLen Brownif ACPI 473e11c3ceSLen Brown 488a1664beSGraeme Gregoryconfig ACPI_LEGACY_TABLES_LOOKUP 498a1664beSGraeme Gregory bool 508a1664beSGraeme Gregory 5146ba51eaSHanjun Guoconfig ARCH_MIGHT_HAVE_ACPI_PDC 5246ba51eaSHanjun Guo bool 5346ba51eaSHanjun Guo 54d8f4f161SLorenzo Pieralisiconfig ACPI_GENERIC_GSI 55d8f4f161SLorenzo Pieralisi bool 56d8f4f161SLorenzo Pieralisi 576e0a0ea1SGraeme Gregoryconfig ACPI_SYSTEM_POWER_STATES_SUPPORT 586e0a0ea1SGraeme Gregory bool 596e0a0ea1SGraeme Gregory 60d0562674SSuthikulpanit, Suraveeconfig ACPI_CCA_REQUIRED 61d0562674SSuthikulpanit, Suravee bool 62d0562674SSuthikulpanit, Suravee 63f64bd790SDan Williamsconfig ACPI_TABLE_LIB 64f64bd790SDan Williams bool 65f64bd790SDan Williams 664d946f79SLv Zhengconfig ACPI_DEBUGGER 678cfb0cdfSLv Zheng bool "AML debugger interface" 684d946f79SLv Zheng select ACPI_DEBUG 694d946f79SLv Zheng help 70836d0830SLv Zheng Enable in-kernel debugging of AML facilities: statistics, 71836d0830SLv Zheng internal object dump, single step control method execution. 724d946f79SLv Zheng This is still under development, currently enabling this only 734d946f79SLv Zheng results in the compilation of the ACPICA debugger files. 744d946f79SLv Zheng 75836d0830SLv Zhengif ACPI_DEBUGGER 76836d0830SLv Zheng 77836d0830SLv Zhengconfig ACPI_DEBUGGER_USER 78c117dfffSMasanari Iida tristate "Userspace debugger accessibility" 79836d0830SLv Zheng depends on DEBUG_FS 80836d0830SLv Zheng help 81836d0830SLv Zheng Export /sys/kernel/debug/acpi/acpidbg for userspace utilities 82836d0830SLv Zheng to access the debugger functionalities. 83836d0830SLv Zheng 84836d0830SLv Zhengendif 85836d0830SLv Zheng 86ad1696f6SAleksey Makarovconfig ACPI_SPCR_TABLE 870231d000SPrarit Bhargava bool "ACPI Serial Port Console Redirection Support" 880231d000SPrarit Bhargava default y if X86 890231d000SPrarit Bhargava help 900231d000SPrarit Bhargava Enable support for Serial Port Console Redirection (SPCR) Table. 910231d000SPrarit Bhargava This table provides information about the configuration of the 920231d000SPrarit Bhargava earlycon console. 93ad1696f6SAleksey Makarov 94d1eb86e5SZhang Ruiconfig ACPI_FPDT 95d1eb86e5SZhang Rui bool "ACPI Firmware Performance Data Table (FPDT) support" 96d1eb86e5SZhang Rui depends on X86_64 97d1eb86e5SZhang Rui help 98d1eb86e5SZhang Rui Enable support for the Firmware Performance Data Table (FPDT). 99d1eb86e5SZhang Rui This table provides information on the timing of the system 100d1eb86e5SZhang Rui boot, S3 suspend and S3 resume firmware code paths. 101d1eb86e5SZhang Rui 102eeb2d80dSSrinivas Pandruvadaconfig ACPI_LPIT 103eeb2d80dSSrinivas Pandruvada bool 104eeb2d80dSSrinivas Pandruvada depends on X86_64 105eeb2d80dSSrinivas Pandruvada default y 106eeb2d80dSSrinivas Pandruvada 107673d5b43SLen Brownconfig ACPI_SLEEP 108673d5b43SLen Brown bool 1095d1e072bSRafael J. Wysocki depends on SUSPEND || HIBERNATION 1106e0a0ea1SGraeme Gregory depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 111673d5b43SLen Brown default y 112673d5b43SLen Brown 11318d78b64SRafael J. Wysockiconfig ACPI_REV_OVERRIDE_POSSIBLE 1149165dabbSMasanari Iida bool "Allow supported ACPI revision to be overridden" 11518d78b64SRafael J. Wysocki depends on X86 11618d78b64SRafael J. Wysocki default y 11718d78b64SRafael J. Wysocki help 11818d78b64SRafael J. Wysocki The platform firmware on some systems expects Linux to return "5" as 11918d78b64SRafael J. Wysocki the supported ACPI revision which makes it expose system configuration 12018d78b64SRafael J. Wysocki information in a special way. 12118d78b64SRafael J. Wysocki 12218d78b64SRafael J. Wysocki For example, based on what ACPI exports as the supported revision, 12318d78b64SRafael J. Wysocki Dell XPS 13 (2015) configures its audio device to either work in HDA 12418d78b64SRafael J. Wysocki mode or in I2S mode, where the former is supposed to be used on Linux 12518d78b64SRafael J. Wysocki until the latter is fully supported (in the kernel as well as in user 12618d78b64SRafael J. Wysocki space). 12718d78b64SRafael J. Wysocki 12818d78b64SRafael J. Wysocki This option enables a DMI-based quirk for the above Dell machine (so 12918d78b64SRafael J. Wysocki that HDA audio is exposed by the platform firmware to the kernel) and 13018d78b64SRafael J. Wysocki makes it possible to force the kernel to return "5" as the supported 13118d78b64SRafael J. Wysocki ACPI revision via the "acpi_rev_override" command line switch. 13218d78b64SRafael J. Wysocki 1331195a098SThomas Renningerconfig ACPI_EC_DEBUGFS 1341195a098SThomas Renninger tristate "EC read/write access through /sys/kernel/debug/ec" 1351195a098SThomas Renninger help 1361195a098SThomas Renninger Say N to disable Embedded Controller /sys/kernel/debug interface 1371195a098SThomas Renninger 138500de3ddSThomas Renninger Be aware that using this interface can confuse your Embedded 139500de3ddSThomas Renninger Controller in a way that a normal reboot is not enough. You then 14025cb1bfdSAndrea Gelmini have to power off your system, and remove the laptop battery for 141500de3ddSThomas Renninger some seconds. 1421195a098SThomas Renninger An Embedded Controller typically is available on laptops and reads 1431195a098SThomas Renninger sensor values like battery state and temperature. 144500de3ddSThomas Renninger The kernel accesses the EC through ACPI parsed code provided by BIOS 145500de3ddSThomas Renninger tables. This option allows to access the EC directly without ACPI 146500de3ddSThomas Renninger code being involved. 1471195a098SThomas Renninger Thus this option is a debug option that helps to write ACPI drivers 1481195a098SThomas Renninger and can be used to identify ACPI code or EC firmware bugs. 1491195a098SThomas Renninger 1501da177e4SLinus Torvaldsconfig ACPI_AC 1511da177e4SLinus Torvalds tristate "AC Adapter" 1521b3d4c3bSZhang Rui select POWER_SUPPLY 15307fefe4cSLen Brown default y 1541da177e4SLinus Torvalds help 1551c48aa36SBjorn Helgaas This driver supports the AC Adapter object, which indicates 1561c48aa36SBjorn Helgaas whether a system is on AC or not. If you have a system that can 15707fefe4cSLen Brown switch between A/C and battery, say Y. 1581da177e4SLinus Torvalds 1591c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1601c48aa36SBjorn Helgaas the module will be called ac. 1611c48aa36SBjorn Helgaas 1621da177e4SLinus Torvaldsconfig ACPI_BATTERY 1631da177e4SLinus Torvalds tristate "Battery" 1641b3d4c3bSZhang Rui select POWER_SUPPLY 16507fefe4cSLen Brown default y 1661da177e4SLinus Torvalds help 1671da177e4SLinus Torvalds This driver adds support for battery information through 1681da177e4SLinus Torvalds /proc/acpi/battery. If you have a mobile system with a battery, 1691da177e4SLinus Torvalds say Y. 1701da177e4SLinus Torvalds 1711c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1721c48aa36SBjorn Helgaas the module will be called battery. 1731c48aa36SBjorn Helgaas 1741da177e4SLinus Torvaldsconfig ACPI_BUTTON 1751da177e4SLinus Torvalds tristate "Button" 176c0968f0eSDmitry Torokhov depends on INPUT 17707fefe4cSLen Brown default y 1781da177e4SLinus Torvalds help 1791c48aa36SBjorn Helgaas This driver handles events on the power, sleep, and lid buttons. 1807d13f94cSKrzysztof Mazur A daemon reads events from input devices or via netlink and 1817d13f94cSKrzysztof Mazur performs user-defined actions such as shutting down the system. 1827d13f94cSKrzysztof Mazur This is necessary for software-controlled poweroff. 1831c48aa36SBjorn Helgaas 1841c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 1851c48aa36SBjorn Helgaas the module will be called button. 1861da177e4SLinus Torvalds 187a1b93e89SJosh Triplettconfig ACPI_TINY_POWER_BUTTON 188a1b93e89SJosh Triplett tristate "Tiny Power Button Driver" 189a1b93e89SJosh Triplett depends on !ACPI_BUTTON 190a1b93e89SJosh Triplett help 191a1b93e89SJosh Triplett This driver provides a tiny alternative to the ACPI Button driver. 192a1b93e89SJosh Triplett The tiny power button driver only handles the power button. Rather 193a1b93e89SJosh Triplett than notifying userspace via the input layer or a netlink event, this 194a1b93e89SJosh Triplett driver directly signals the init process to shut down. 195a1b93e89SJosh Triplett 196a1b93e89SJosh Triplett This driver is particularly suitable for cloud and VM environments, 197a1b93e89SJosh Triplett which use a simulated power button to initiate a controlled poweroff, 198a1b93e89SJosh Triplett but which may not want to run a separate userspace daemon to process 199a1b93e89SJosh Triplett input events. 200a1b93e89SJosh Triplett 201a1b93e89SJosh Triplettconfig ACPI_TINY_POWER_BUTTON_SIGNAL 202a1b93e89SJosh Triplett int "Tiny Power Button Signal" 203a1b93e89SJosh Triplett depends on ACPI_TINY_POWER_BUTTON 204a1b93e89SJosh Triplett default 38 205a1b93e89SJosh Triplett help 206a1b93e89SJosh Triplett Default signal to send to init in response to the power button. 207a1b93e89SJosh Triplett 208a1b93e89SJosh Triplett Likely values here include 38 (SIGRTMIN+4) to power off, or 2 209a1b93e89SJosh Triplett (SIGINT) to simulate Ctrl+Alt+Del. 210a1b93e89SJosh Triplett 2111da177e4SLinus Torvaldsconfig ACPI_VIDEO 2121da177e4SLinus Torvalds tristate "Video" 2139f380fc5SJean Delvare depends on X86 && BACKLIGHT_CLASS_DEVICE 21403e2bf26SAndreas Herrmann depends on INPUT 21563c4ec90SZhang Rui select THERMAL 2161da177e4SLinus Torvalds help 2171c48aa36SBjorn Helgaas This driver implements the ACPI Extensions For Display Adapters 2181da177e4SLinus Torvalds for integrated graphics devices on motherboard, as specified in 2191c48aa36SBjorn Helgaas ACPI 2.0 Specification, Appendix B. This supports basic operations 2201c48aa36SBjorn Helgaas such as defining the video POST device, retrieving EDID information, 2211c48aa36SBjorn Helgaas and setting up a video output. 2221c48aa36SBjorn Helgaas 2231c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2241c48aa36SBjorn Helgaas the module will be called video. 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvaldsconfig ACPI_FAN 2271da177e4SLinus Torvalds tristate "Fan" 228d8054749SZhang Rui depends on THERMAL 22907fefe4cSLen Brown default y 2301da177e4SLinus Torvalds help 2311c48aa36SBjorn Helgaas This driver supports ACPI fan devices, allowing user-mode 2321da177e4SLinus Torvalds applications to perform basic fan control (on, off, status). 2331da177e4SLinus Torvalds 2341c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2351c48aa36SBjorn Helgaas the module will be called fan. 2361c48aa36SBjorn Helgaas 23795c513ecSRafael J. Wysockiconfig ACPI_TAD 23895c513ecSRafael J. Wysocki tristate "ACPI Time and Alarm (TAD) Device Support" 23995c513ecSRafael J. Wysocki depends on SYSFS && PM_SLEEP 24095c513ecSRafael J. Wysocki help 24195c513ecSRafael J. Wysocki The ACPI Time and Alarm (TAD) device is an alternative to the Real 24295c513ecSRafael J. Wysocki Time Clock (RTC). Its wake timers allow the system to transition from 24395c513ecSRafael J. Wysocki the S3 (or optionally S4/S5) state to S0 state after a time period 24495c513ecSRafael J. Wysocki elapses. In comparison with the RTC Alarm, the TAD provides a larger 24595c513ecSRafael J. Wysocki scale of flexibility in the wake timers. The time capabilities of the 24695c513ecSRafael J. Wysocki TAD maintain the time of day information across platform power 24795c513ecSRafael J. Wysocki transitions, and keep track of time even when the platform is turned 24895c513ecSRafael J. Wysocki off. 24995c513ecSRafael J. Wysocki 250c8f7a62cSLen Brownconfig ACPI_DOCK 251898b054fSShaohua Li bool "Dock" 252c8f7a62cSLen Brown help 2531c48aa36SBjorn Helgaas This driver supports ACPI-controlled docking stations and removable 2541c48aa36SBjorn Helgaas drive bays such as the IBM Ultrabay and the Dell Module Bay. 25501b57e73SKristen Carlson Accardi 256239708a3SAshwin Chauguleconfig ACPI_CPU_FREQ_PSS 257239708a3SAshwin Chaugule bool 258239708a3SAshwin Chaugule select THERMAL 259239708a3SAshwin Chaugule 26035ae7133SSudeep Hollaconfig ACPI_PROCESSOR_CSTATE 26135ae7133SSudeep Holla def_bool y 262239ed06dSRafael J. Wysocki depends on ACPI_PROCESSOR 26335ae7133SSudeep Holla depends on IA64 || X86 26435ae7133SSudeep Holla 2655f05586cSAshwin Chauguleconfig ACPI_PROCESSOR_IDLE 2665f05586cSAshwin Chaugule bool 2675f05586cSAshwin Chaugule select CPU_IDLE 2685f05586cSAshwin Chaugule 269935c760eSTomasz Nowickiconfig ACPI_MCFG 270935c760eSTomasz Nowicki bool 271935c760eSTomasz Nowicki 272337aadffSAshwin Chauguleconfig ACPI_CPPC_LIB 273337aadffSAshwin Chaugule bool 274337aadffSAshwin Chaugule depends on ACPI_PROCESSOR 275337aadffSAshwin Chaugule select MAILBOX 276337aadffSAshwin Chaugule select PCC 277337aadffSAshwin Chaugule help 278337aadffSAshwin Chaugule If this option is enabled, this file implements common functionality 279337aadffSAshwin Chaugule to parse CPPC tables as described in the ACPI 5.1+ spec. The 280337aadffSAshwin Chaugule routines implemented are meant to be used by other 281337aadffSAshwin Chaugule drivers to control CPU performance using CPPC semantics. 282337aadffSAshwin Chaugule If your platform does not support CPPC in firmware, 283337aadffSAshwin Chaugule leave this option disabled. 284337aadffSAshwin Chaugule 2851da177e4SLinus Torvaldsconfig ACPI_PROCESSOR 2861da177e4SLinus Torvalds tristate "Processor" 287b1121e2aSHuacai Chen depends on X86 || IA64 || ARM64 || LOONGARCH 2888fc85c6aSSudeep Holla select ACPI_PROCESSOR_IDLE 289b1121e2aSHuacai Chen select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH 29007fefe4cSLen Brown default y 2911da177e4SLinus Torvalds help 292239708a3SAshwin Chaugule This driver adds support for the ACPI Processor package. It is required 293239708a3SAshwin Chaugule by several flavors of cpufreq performance-state, thermal, throttling and 294239708a3SAshwin Chaugule idle drivers. 2951c48aa36SBjorn Helgaas 2961c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 2971c48aa36SBjorn Helgaas the module will be called processor. 2984b88e330SLv Zheng 299e92b297cSZhao Yakuiconfig ACPI_IPMI 300e92b297cSZhao Yakui tristate "IPMI" 30150121bebSSinan Kaya depends on IPMI_HANDLER 302e92b297cSZhao Yakui help 303e92b297cSZhao Yakui This driver enables the ACPI to access the BMC controller. And it 304e92b297cSZhao Yakui uses the IPMI request/response message to communicate with BMC 305*a8ab8ef4STom Rix controller, which can be found on the server. 306e92b297cSZhao Yakui 307e92b297cSZhao Yakui To compile this driver as a module, choose M here: 308e92b297cSZhao Yakui the module will be called as acpi_ipmi. 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_CPU 311cbfc1baeSAdrian Bunk bool 312f756f28bSKees Cook depends on ACPI_PROCESSOR && HOTPLUG_CPU 3131da177e4SLinus Torvalds select ACPI_CONTAINER 314cbfc1baeSAdrian Bunk default y 3151da177e4SLinus Torvalds 3168e0af514SShaohua Liconfig ACPI_PROCESSOR_AGGREGATOR 3178e0af514SShaohua Li tristate "Processor Aggregator" 3188e0af514SShaohua Li depends on ACPI_PROCESSOR 319d91f79ebSLen Brown depends on X86 3208e0af514SShaohua Li help 3218e0af514SShaohua Li ACPI 4.0 defines processor Aggregator, which enables OS to perform 322c4c4e2a5SJiri Slaby specific processor configuration and control that applies to all 3238e0af514SShaohua Li processors in the platform. Currently only logical processor idling 3248e0af514SShaohua Li is defined, which is to reduce power consumption. This driver 325c4c4e2a5SJiri Slaby supports the new device. 3268e0af514SShaohua Li 3271da177e4SLinus Torvaldsconfig ACPI_THERMAL 3281da177e4SLinus Torvalds tristate "Thermal Zone" 3291da177e4SLinus Torvalds depends on ACPI_PROCESSOR 3303f655ef8SZhang Rui select THERMAL 33107fefe4cSLen Brown default y 3321da177e4SLinus Torvalds help 3331c48aa36SBjorn Helgaas This driver supports ACPI thermal zones. Most mobile and 3341da177e4SLinus Torvalds some desktop systems support ACPI thermal zones. It is HIGHLY 3351da177e4SLinus Torvalds recommended that this option be enabled, as your processor(s) 3361da177e4SLinus Torvalds may be damaged without it. 3371da177e4SLinus Torvalds 3381c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 3391c48aa36SBjorn Helgaas the module will be called thermal. 3401c48aa36SBjorn Helgaas 341a2ff95e0SMark Pearsonconfig ACPI_PLATFORM_PROFILE 34221f05a43SMaximilian Luz tristate 343a2ff95e0SMark Pearson 3447ce9573eSRandy Dunlapconfig ACPI_CUSTOM_DSDT_FILE 3457ce9573eSRandy Dunlap string "Custom DSDT Table file to include" 3467ce9573eSRandy Dunlap default "" 3471da177e4SLinus Torvalds depends on !STANDALONE 3481da177e4SLinus Torvalds help 349d89e9d6bSLen Brown This option supports a custom DSDT by linking it into the kernel. 350cb1aaebeSMauro Carvalho Chehab See Documentation/admin-guide/acpi/dsdt-override.rst 351d89e9d6bSLen Brown 352c30fe7f7SUwe Zeisberger Enter the full path name to the file which includes the AmlCode 35382e4eb4eSWang Dongsheng or dsdt_aml_code declaration. 3541da177e4SLinus Torvalds 3557ce9573eSRandy Dunlap If unsure, don't enter a file name. 3567ce9573eSRandy Dunlap 3577ce9573eSRandy Dunlapconfig ACPI_CUSTOM_DSDT 3587ce9573eSRandy Dunlap bool 3597ce9573eSRandy Dunlap default ACPI_CUSTOM_DSDT_FILE != "" 3607ce9573eSRandy Dunlap 36191dda51aSAleksey Makarovconfig ARCH_HAS_ACPI_TABLE_UPGRADE 36291dda51aSAleksey Makarov def_bool n 36391dda51aSAleksey Makarov 3645d881327SLv Zhengconfig ACPI_TABLE_UPGRADE 3655d881327SLv Zheng bool "Allow upgrading ACPI tables via initrd" 36691dda51aSAleksey Makarov depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 3675d881327SLv Zheng default y 36853aac44cSThomas Renninger help 3695d881327SLv Zheng This option provides functionality to upgrade arbitrary ACPI tables 37053aac44cSThomas Renninger via initrd. No functional change if no ACPI tables are passed via 37153aac44cSThomas Renninger initrd, therefore it's safe to say Y. 372cb1aaebeSMauro Carvalho Chehab See Documentation/admin-guide/acpi/initrd_table_override.rst for details 37353aac44cSThomas Renninger 37498a455d9SShunyong Yangconfig ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD 37598a455d9SShunyong Yang bool "Override ACPI tables from built-in initrd" 37698a455d9SShunyong Yang depends on ACPI_TABLE_UPGRADE 377d2cbbf1fSRobert Richter depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION_NONE 37898a455d9SShunyong Yang help 37998a455d9SShunyong Yang This option provides functionality to override arbitrary ACPI tables 38098a455d9SShunyong Yang from built-in uncompressed initrd. 38198a455d9SShunyong Yang 382cb1aaebeSMauro Carvalho Chehab See Documentation/admin-guide/acpi/initrd_table_override.rst for details 38398a455d9SShunyong Yang 3841da177e4SLinus Torvaldsconfig ACPI_DEBUG 3851da177e4SLinus Torvalds bool "Debug Statements" 3861da177e4SLinus Torvalds help 387a0d84a92SBjorn Helgaas The ACPI subsystem can produce debug output. Saying Y enables this 388a0d84a92SBjorn Helgaas output and increases the kernel size by around 50K. 389a0d84a92SBjorn Helgaas 390a0d84a92SBjorn Helgaas Use the acpi.debug_layer and acpi.debug_level kernel command-line 391cb1aaebeSMauro Carvalho Chehab parameters documented in Documentation/firmware-guide/acpi/debug.rst and 3928c27ceffSMauro Carvalho Chehab Documentation/admin-guide/kernel-parameters.rst to control the type and 393a0d84a92SBjorn Helgaas amount of debug output. 3941da177e4SLinus Torvalds 3958344b568SAlex Chiangconfig ACPI_PCI_SLOT 396ab1a2e03SJiang Liu bool "PCI slot detection driver" 3975c6a1177SSinan Kaya depends on SYSFS && PCI 3988344b568SAlex Chiang help 3991c48aa36SBjorn Helgaas This driver creates entries in /sys/bus/pci/slots/ for all PCI 4001c48aa36SBjorn Helgaas slots in the system. This can help correlate PCI bus addresses, 4011c48aa36SBjorn Helgaas i.e., segment/bus/device/function tuples, with physical slots in 4021c48aa36SBjorn Helgaas the system. If you are unsure, say N. 4031c48aa36SBjorn Helgaas 4041da177e4SLinus Torvaldsconfig ACPI_CONTAINER 40506991c28SLinus Torvalds bool "Container and Module Devices" 406ea6a4581SPaul Bolle default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 4071c48aa36SBjorn Helgaas help 4081c48aa36SBjorn Helgaas This driver supports ACPI Container and Module devices (IDs 4091c48aa36SBjorn Helgaas ACPI0004, PNP0A05, and PNP0A06). 41045b1b196SKeiichiro Tokunaga 4111c48aa36SBjorn Helgaas This helps support hotplug of nodes, CPUs, and memory. 4121c48aa36SBjorn Helgaas 4131da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_MEMORY 4140a347644SRafael J. Wysocki bool "Memory Hotplug" 415bc02af93SYasunori Goto depends on MEMORY_HOTPLUG 4161da177e4SLinus Torvalds help 4171c48aa36SBjorn Helgaas This driver supports ACPI memory hotplug. The driver 4181c48aa36SBjorn Helgaas fields notifications on ACPI memory devices (PNP0C80), 4191c48aa36SBjorn Helgaas which represent memory ranges that may be onlined or 4201c48aa36SBjorn Helgaas offlined during runtime. 4211da177e4SLinus Torvalds 4221c48aa36SBjorn Helgaas If your hardware and firmware do not support adding or 4231c48aa36SBjorn Helgaas removing memory devices at runtime, you need not enable 4241c48aa36SBjorn Helgaas this driver. 4251da177e4SLinus Torvalds 426c183619bSJiang Liuconfig ACPI_HOTPLUG_IOAPIC 427c183619bSJiang Liu bool 428c183619bSJiang Liu depends on PCI 429c183619bSJiang Liu depends on X86_IO_APIC 430c183619bSJiang Liu default y 431c183619bSJiang Liu 4323f86b832SRich Townsendconfig ACPI_SBS 43394f6c086SAlexey Starikovskiy tristate "Smart Battery System" 434b4150fc4SVladimir Lebedev depends on X86 4351b3d4c3bSZhang Rui select POWER_SUPPLY 4363f86b832SRich Townsend help 4371c48aa36SBjorn Helgaas This driver supports the Smart Battery System, another 43894f6c086SAlexey Starikovskiy type of access to battery information, found on some laptops. 4393f86b832SRich Townsend 4401c48aa36SBjorn Helgaas To compile this driver as a module, choose M here: 4411c48aa36SBjorn Helgaas the modules will be called sbs and sbshc. 4421c48aa36SBjorn Helgaas 443801eab81SHuang Yingconfig ACPI_HED 444801eab81SHuang Ying tristate "Hardware Error Device" 445801eab81SHuang Ying help 446801eab81SHuang Ying This driver supports the Hardware Error Device (PNP0C33), 447801eab81SHuang Ying which is used to report some hardware errors notified via 448801eab81SHuang Ying SCI, mainly the corrected errors. 449801eab81SHuang Ying 450526b4af4SThomas Renningerconfig ACPI_CUSTOM_METHOD 451526b4af4SThomas Renninger tristate "Allow ACPI methods to be inserted/replaced at run time" 452526b4af4SThomas Renninger depends on DEBUG_FS 453526b4af4SThomas Renninger help 454bd1b2a55SJustin P. Mattock This debug facility allows ACPI AML methods to be inserted and/or 455526b4af4SThomas Renninger replaced without rebooting the system. For details refer to: 456cb1aaebeSMauro Carvalho Chehab Documentation/firmware-guide/acpi/method-customizing.rst. 457526b4af4SThomas Renninger 458526b4af4SThomas Renninger NOTE: This option is security sensitive, because it allows arbitrary 459526b4af4SThomas Renninger kernel memory to be written to by root (uid=0) users, allowing them 460526b4af4SThomas Renninger to bypass certain security measures (e.g. if root is not allowed to 461526b4af4SThomas Renninger load additional kernel modules after boot, this feature may be used 462526b4af4SThomas Renninger to override that restriction). 463526b4af4SThomas Renninger 464d1ff4b1cSMatthew Garrettconfig ACPI_BGRT 4652223af38SJosh Triplett bool "Boottime Graphics Resource Table support" 4666e7300cfSBhupesh Sharma depends on EFI && (X86 || ARM64) 467d1ff4b1cSMatthew Garrett help 468d1ff4b1cSMatthew Garrett This driver adds support for exposing the ACPI Boottime Graphics 469d1ff4b1cSMatthew Garrett Resource Table, which allows the operating system to obtain 470d1ff4b1cSMatthew Garrett data from the firmware boot splash. It will appear under 471d1ff4b1cSMatthew Garrett /sys/firmware/acpi/bgrt/ . 472d1ff4b1cSMatthew Garrett 473af1ae78aSAl Stoneconfig ACPI_REDUCED_HARDWARE_ONLY 474af1ae78aSAl Stone bool "Hardware-reduced ACPI support only" if EXPERT 475af1ae78aSAl Stone def_bool n 476af1ae78aSAl Stone help 477af1ae78aSAl Stone This config item changes the way the ACPI code is built. When this 478af1ae78aSAl Stone option is selected, the kernel will use a specialized version of 479af1ae78aSAl Stone ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 480af1ae78aSAl Stone resulting kernel will be smaller but it will also be restricted to 481af1ae78aSAl Stone running in ACPI reduced hardware mode ONLY. 482af1ae78aSAl Stone 483af1ae78aSAl Stone If you are unsure what to do, do not enable this option. 484af1ae78aSAl Stone 485bdf97013SDan Williamssource "drivers/acpi/nfit/Kconfig" 486c710fcc5SDan Williamssource "drivers/acpi/numa/Kconfig" 487a643ce20SHuang Yingsource "drivers/acpi/apei/Kconfig" 4886256ebd5SSrinivas Pandruvadasource "drivers/acpi/dptf/Kconfig" 489a643ce20SHuang Ying 490058dfc76SMika Westerbergconfig ACPI_WATCHDOG 491058dfc76SMika Westerberg bool 492058dfc76SMika Westerberg 4934b3db708SChen, Gongconfig ACPI_EXTLOG 4944b3db708SChen, Gong tristate "Extended Error Log support" 4959613916bSBorislav Petkov depends on X86_MCE && X86_LOCAL_APIC && EDAC 4967ea6c6c1SLuck, Tony select UEFI_CPER 4974b3db708SChen, Gong help 4984b3db708SChen, Gong Certain usages such as Predictive Failure Analysis (PFA) require 4994b3db708SChen, Gong more information about the error than what can be described in 5004b3db708SChen, Gong processor machine check banks. Most server processors log 5014b3db708SChen, Gong additional information about the error in processor uncore 5024b3db708SChen, Gong registers. Since the addresses and layout of these registers vary 5034b3db708SChen, Gong widely from one processor to another, system software cannot 5044b3db708SChen, Gong readily make use of them. To complicate matters further, some of 5054b3db708SChen, Gong the additional error information cannot be constructed without 5064b3db708SChen, Gong detailed knowledge about platform topology. 5074b3db708SChen, Gong 5084b3db708SChen, Gong Enhanced MCA Logging allows firmware to provide additional error 5094b3db708SChen, Gong information to system software, synchronous with MCE or CMCI. This 5102dfb7d51SChen, Gong driver adds support for that functionality with corresponding 5112dfb7d51SChen, Gong tracepoint which carries that information to userspace. 5124b3db708SChen, Gong 5134cf841e3STony Luckconfig ACPI_ADXL 5144cf841e3STony Luck bool 5154cf841e3STony Luck 5160bf54fcdSOctavian Purdilaconfig ACPI_CONFIGFS 5170bf54fcdSOctavian Purdila tristate "ACPI configfs support" 5180bf54fcdSOctavian Purdila select CONFIGFS_FS 5190bf54fcdSOctavian Purdila help 5200bf54fcdSOctavian Purdila Select this option to enable support for ACPI configuration from 5210bf54fcdSOctavian Purdila userspace. The configurable ACPI groups will be visible under 5220bf54fcdSOctavian Purdila /config/acpi, assuming configfs is mounted under /config. 5230bf54fcdSOctavian Purdila 5240db89fa2SChen Yuconfig ACPI_PFRUT 5250db89fa2SChen Yu tristate "ACPI Platform Firmware Runtime Update and Telemetry" 5260db89fa2SChen Yu depends on 64BIT 5270db89fa2SChen Yu help 5280db89fa2SChen Yu This mechanism allows certain pieces of the platform firmware 5290db89fa2SChen Yu to be updated on the fly while the system is running (runtime) 5300db89fa2SChen Yu without the need to restart it, which is key in the cases when 5310db89fa2SChen Yu the system needs to be available 100% of the time and it cannot 5320db89fa2SChen Yu afford the downtime related to restarting it, or when the work 5330db89fa2SChen Yu carried out by the system is particularly important, so it cannot 5340db89fa2SChen Yu be interrupted, and it is not practical to wait until it is complete. 5350db89fa2SChen Yu 5360db89fa2SChen Yu The existing firmware code can be modified (driver update) or 5370db89fa2SChen Yu extended by adding new code to the firmware (code injection). 5380db89fa2SChen Yu 539b0013e03SChen Yu Besides, the telemetry driver allows user space to fetch telemetry 540b0013e03SChen Yu data from the firmware with the help of the Platform Firmware Runtime 541b0013e03SChen Yu Telemetry interface. 542b0013e03SChen Yu 543b0013e03SChen Yu To compile the drivers as modules, choose M here: 544b0013e03SChen Yu the modules will be called pfr_update and pfr_telemetry. 5450db89fa2SChen Yu 54688ef16d8STomasz Nowickiif ARM64 54788ef16d8STomasz Nowickisource "drivers/acpi/arm64/Kconfig" 5480ce82232SJeremy Linton 5490ce82232SJeremy Lintonconfig ACPI_PPTT 5500ce82232SJeremy Linton bool 55188ef16d8STomasz Nowickiendif 55288ef16d8STomasz Nowicki 55377e2a047SSudeep Hollaconfig ACPI_PCC 55477e2a047SSudeep Holla bool "ACPI PCC Address Space" 55577e2a047SSudeep Holla depends on PCC 55677e2a047SSudeep Holla default y 55777e2a047SSudeep Holla help 55877e2a047SSudeep Holla The PCC Address Space also referred as PCC Operation Region pertains 55977e2a047SSudeep Holla to the region of PCC subspace that succeeds the PCC signature. 56077e2a047SSudeep Holla 56177e2a047SSudeep Holla The PCC Operation Region works in conjunction with the PCC Table 56277e2a047SSudeep Holla (Platform Communications Channel Table). PCC subspaces that are 56377e2a047SSudeep Holla marked for use as PCC Operation Regions must not be used as PCC 56477e2a047SSudeep Holla subspaces for the standard ACPI features such as CPPC, RASF, PDTT and 56577e2a047SSudeep Holla MPST. These standard features must always use the PCC Table instead. 56677e2a047SSudeep Holla 56777e2a047SSudeep Holla Enable this feature if you want to set up and install the PCC Address 56877e2a047SSudeep Holla Space handler to handle PCC OpRegion in the firmware. 56977e2a047SSudeep Holla 570fa870509SAndy Shevchenkosource "drivers/acpi/pmic/Kconfig" 571fa870509SAndy Shevchenko 5723cf48554SJean-Philippe Bruckerconfig ACPI_VIOT 5733cf48554SJean-Philippe Brucker bool 5743cf48554SJean-Philippe Brucker 5751da177e4SLinus Torvaldsendif # ACPI 57687e65d05SJan Kiszka 57787e65d05SJan Kiszkaconfig X86_PM_TIMER 57887e65d05SJan Kiszka bool "Power Management Timer Support" if EXPERT 57987e65d05SJan Kiszka depends on X86 && (ACPI || JAILHOUSE_GUEST) 58087e65d05SJan Kiszka default y 58187e65d05SJan Kiszka help 58287e65d05SJan Kiszka The Power Management Timer is available on all ACPI-capable, 58387e65d05SJan Kiszka in most cases even if ACPI is unusable or blacklisted. 58487e65d05SJan Kiszka 58587e65d05SJan Kiszka This timing source is not affected by power management features 58687e65d05SJan Kiszka like aggressive processor idling, throttling, frequency and/or 58787e65d05SJan Kiszka voltage scaling, unlike the commonly used Time Stamp Counter 58887e65d05SJan Kiszka (TSC) timing source. 58987e65d05SJan Kiszka 59087e65d05SJan Kiszka You should nearly always say Y here because many modern 59187e65d05SJan Kiszka systems require this timer. 592cefc7ca4SErik Kaneda 593cefc7ca4SErik Kanedaconfig ACPI_PRMT 594cefc7ca4SErik Kaneda bool "Platform Runtime Mechanism Support" 595cefc7ca4SErik Kaneda depends on EFI && X86_64 596cefc7ca4SErik Kaneda default y 5979b52363bSRafael J. Wysocki help 5989b52363bSRafael J. Wysocki Platform Runtime Mechanism (PRM) is a firmware interface exposing a 5999b52363bSRafael J. Wysocki set of binary executables that can be called from the AML interpreter 6009b52363bSRafael J. Wysocki or directly from device drivers. 6019b52363bSRafael J. Wysocki 6029b52363bSRafael J. Wysocki Say Y to enable the AML interpreter to execute the PRM code. 6039b52363bSRafael J. Wysocki 6049b52363bSRafael J. Wysocki While this feature is optional in principle, leaving it out may 6059b52363bSRafael J. Wysocki substantially increase computational overhead related to the 6069b52363bSRafael J. Wysocki initialization of some server systems. 607