1# SPDX-License-Identifier: GPL-2.0 2# 3# ACPI Configuration 4# 5 6menuconfig ACPI 7 bool "ACPI (Advanced Configuration and Power Interface) Support" 8 depends on !IA64_HP_SIM 9 depends on IA64 || X86 || ARM64 10 depends on PCI 11 select PNP 12 default y if (IA64 || X86) 13 help 14 Advanced Configuration and Power Interface (ACPI) support for 15 Linux requires an ACPI-compliant platform (hardware/firmware), 16 and assumes the presence of OS-directed configuration and power 17 management (OSPM) software. This option will enlarge your 18 kernel by about 70K. 19 20 Linux ACPI provides a robust functional replacement for several 21 legacy configuration and power management interfaces, including 22 the Plug-and-Play BIOS specification (PnP BIOS), the 23 MultiProcessor Specification (MPS), and the Advanced Power 24 Management (APM) specification. If both ACPI and APM support 25 are configured, ACPI is used. 26 27 The project home page for the Linux ACPI subsystem is here: 28 <https://01.org/linux-acpi> 29 30 Linux support for ACPI is based on Intel Corporation's ACPI 31 Component Architecture (ACPI CA). For more information on the 32 ACPI CA, see: 33 <http://acpica.org/> 34 35 ACPI is an open industry specification originally co-developed by 36 Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, 37 it is developed by the ACPI Specification Working Group (ASWG) under 38 the UEFI Forum and any UEFI member can join the ASWG and contribute 39 to the ACPI specification. 40 The specification is available at: 41 <http://www.acpi.info> 42 <http://www.uefi.org/acpi/specs> 43 44if ACPI 45 46config ACPI_LEGACY_TABLES_LOOKUP 47 bool 48 49config ARCH_MIGHT_HAVE_ACPI_PDC 50 bool 51 52config ACPI_GENERIC_GSI 53 bool 54 55config ACPI_SYSTEM_POWER_STATES_SUPPORT 56 bool 57 58config ACPI_CCA_REQUIRED 59 bool 60 61config ACPI_DEBUGGER 62 bool "AML debugger interface" 63 select ACPI_DEBUG 64 help 65 Enable in-kernel debugging of AML facilities: statistics, 66 internal object dump, single step control method execution. 67 This is still under development, currently enabling this only 68 results in the compilation of the ACPICA debugger files. 69 70if ACPI_DEBUGGER 71 72config ACPI_DEBUGGER_USER 73 tristate "Userspace debugger accessiblity" 74 depends on DEBUG_FS 75 help 76 Export /sys/kernel/debug/acpi/acpidbg for userspace utilities 77 to access the debugger functionalities. 78 79endif 80 81config ACPI_SPCR_TABLE 82 bool "ACPI Serial Port Console Redirection Support" 83 default y if X86 84 help 85 Enable support for Serial Port Console Redirection (SPCR) Table. 86 This table provides information about the configuration of the 87 earlycon console. 88 89config ACPI_LPIT 90 bool 91 depends on X86_64 92 default y 93 94config ACPI_SLEEP 95 bool 96 depends on SUSPEND || HIBERNATION 97 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 98 default y 99 100config ACPI_PROCFS_POWER 101 bool "Deprecated power /proc/acpi directories" 102 depends on X86 && PROC_FS 103 help 104 For backwards compatibility, this option allows 105 deprecated power /proc/acpi/ directories to exist, even when 106 they have been replaced by functions in /sys. 107 The deprecated directories (and their replacements) include: 108 /proc/acpi/battery/* (/sys/class/power_supply/*) and 109 /proc/acpi/ac_adapter/* (sys/class/power_supply/*). 110 This option has no effect on /proc/acpi/ directories 111 and functions which do not yet exist in /sys. 112 This option, together with the proc directories, will be 113 deleted in the future. 114 115 Say N to delete power /proc/acpi/ directories that have moved to /sys. 116 117config ACPI_REV_OVERRIDE_POSSIBLE 118 bool "Allow supported ACPI revision to be overridden" 119 depends on X86 120 default y 121 help 122 The platform firmware on some systems expects Linux to return "5" as 123 the supported ACPI revision which makes it expose system configuration 124 information in a special way. 125 126 For example, based on what ACPI exports as the supported revision, 127 Dell XPS 13 (2015) configures its audio device to either work in HDA 128 mode or in I2S mode, where the former is supposed to be used on Linux 129 until the latter is fully supported (in the kernel as well as in user 130 space). 131 132 This option enables a DMI-based quirk for the above Dell machine (so 133 that HDA audio is exposed by the platform firmware to the kernel) and 134 makes it possible to force the kernel to return "5" as the supported 135 ACPI revision via the "acpi_rev_override" command line switch. 136 137config ACPI_EC_DEBUGFS 138 tristate "EC read/write access through /sys/kernel/debug/ec" 139 default n 140 help 141 Say N to disable Embedded Controller /sys/kernel/debug interface 142 143 Be aware that using this interface can confuse your Embedded 144 Controller in a way that a normal reboot is not enough. You then 145 have to power off your system, and remove the laptop battery for 146 some seconds. 147 An Embedded Controller typically is available on laptops and reads 148 sensor values like battery state and temperature. 149 The kernel accesses the EC through ACPI parsed code provided by BIOS 150 tables. This option allows to access the EC directly without ACPI 151 code being involved. 152 Thus this option is a debug option that helps to write ACPI drivers 153 and can be used to identify ACPI code or EC firmware bugs. 154 155config ACPI_AC 156 tristate "AC Adapter" 157 depends on X86 158 select POWER_SUPPLY 159 default y 160 help 161 This driver supports the AC Adapter object, which indicates 162 whether a system is on AC or not. If you have a system that can 163 switch between A/C and battery, say Y. 164 165 To compile this driver as a module, choose M here: 166 the module will be called ac. 167 168config ACPI_BATTERY 169 tristate "Battery" 170 depends on X86 171 select POWER_SUPPLY 172 default y 173 help 174 This driver adds support for battery information through 175 /proc/acpi/battery. If you have a mobile system with a battery, 176 say Y. 177 178 To compile this driver as a module, choose M here: 179 the module will be called battery. 180 181config ACPI_BUTTON 182 tristate "Button" 183 depends on INPUT 184 default y 185 help 186 This driver handles events on the power, sleep, and lid buttons. 187 A daemon reads events from input devices or via netlink and 188 performs user-defined actions such as shutting down the system. 189 This is necessary for software-controlled poweroff. 190 191 To compile this driver as a module, choose M here: 192 the module will be called button. 193 194config ACPI_VIDEO 195 tristate "Video" 196 depends on X86 && BACKLIGHT_CLASS_DEVICE 197 depends on INPUT 198 select THERMAL 199 help 200 This driver implements the ACPI Extensions For Display Adapters 201 for integrated graphics devices on motherboard, as specified in 202 ACPI 2.0 Specification, Appendix B. This supports basic operations 203 such as defining the video POST device, retrieving EDID information, 204 and setting up a video output. 205 206 To compile this driver as a module, choose M here: 207 the module will be called video. 208 209config ACPI_FAN 210 tristate "Fan" 211 depends on THERMAL 212 default y 213 help 214 This driver supports ACPI fan devices, allowing user-mode 215 applications to perform basic fan control (on, off, status). 216 217 To compile this driver as a module, choose M here: 218 the module will be called fan. 219 220config ACPI_TAD 221 tristate "ACPI Time and Alarm (TAD) Device Support" 222 depends on SYSFS && PM_SLEEP 223 help 224 The ACPI Time and Alarm (TAD) device is an alternative to the Real 225 Time Clock (RTC). Its wake timers allow the system to transition from 226 the S3 (or optionally S4/S5) state to S0 state after a time period 227 elapses. In comparison with the RTC Alarm, the TAD provides a larger 228 scale of flexibility in the wake timers. The time capabilities of the 229 TAD maintain the time of day information across platform power 230 transitions, and keep track of time even when the platform is turned 231 off. 232 233config ACPI_DOCK 234 bool "Dock" 235 help 236 This driver supports ACPI-controlled docking stations and removable 237 drive bays such as the IBM Ultrabay and the Dell Module Bay. 238 239config ACPI_CPU_FREQ_PSS 240 bool 241 select THERMAL 242 243config ACPI_PROCESSOR_CSTATE 244 def_bool y 245 depends on IA64 || X86 246 247config ACPI_PROCESSOR_IDLE 248 bool 249 select CPU_IDLE 250 251config ACPI_MCFG 252 bool 253 254config ACPI_CPPC_LIB 255 bool 256 depends on ACPI_PROCESSOR 257 select MAILBOX 258 select PCC 259 help 260 If this option is enabled, this file implements common functionality 261 to parse CPPC tables as described in the ACPI 5.1+ spec. The 262 routines implemented are meant to be used by other 263 drivers to control CPU performance using CPPC semantics. 264 If your platform does not support CPPC in firmware, 265 leave this option disabled. 266 267config ACPI_PROCESSOR 268 tristate "Processor" 269 depends on X86 || IA64 || ARM64 270 select ACPI_PROCESSOR_IDLE 271 select ACPI_CPU_FREQ_PSS if X86 || IA64 272 default y 273 help 274 This driver adds support for the ACPI Processor package. It is required 275 by several flavors of cpufreq performance-state, thermal, throttling and 276 idle drivers. 277 278 To compile this driver as a module, choose M here: 279 the module will be called processor. 280 281config ACPI_IPMI 282 tristate "IPMI" 283 depends on IPMI_HANDLER 284 default n 285 help 286 This driver enables the ACPI to access the BMC controller. And it 287 uses the IPMI request/response message to communicate with BMC 288 controller, which can be found on on the server. 289 290 To compile this driver as a module, choose M here: 291 the module will be called as acpi_ipmi. 292 293config ACPI_HOTPLUG_CPU 294 bool 295 depends on ACPI_PROCESSOR && HOTPLUG_CPU 296 select ACPI_CONTAINER 297 default y 298 299config ACPI_PROCESSOR_AGGREGATOR 300 tristate "Processor Aggregator" 301 depends on ACPI_PROCESSOR 302 depends on X86 303 help 304 ACPI 4.0 defines processor Aggregator, which enables OS to perform 305 specific processor configuration and control that applies to all 306 processors in the platform. Currently only logical processor idling 307 is defined, which is to reduce power consumption. This driver 308 supports the new device. 309 310config ACPI_THERMAL 311 tristate "Thermal Zone" 312 depends on ACPI_PROCESSOR 313 select THERMAL 314 default y 315 help 316 This driver supports ACPI thermal zones. Most mobile and 317 some desktop systems support ACPI thermal zones. It is HIGHLY 318 recommended that this option be enabled, as your processor(s) 319 may be damaged without it. 320 321 To compile this driver as a module, choose M here: 322 the module will be called thermal. 323 324config ACPI_NUMA 325 bool "NUMA support" 326 depends on NUMA 327 depends on (X86 || IA64 || ARM64) 328 default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 329 330config ACPI_CUSTOM_DSDT_FILE 331 string "Custom DSDT Table file to include" 332 default "" 333 depends on !STANDALONE 334 help 335 This option supports a custom DSDT by linking it into the kernel. 336 See Documentation/acpi/dsdt-override.txt 337 338 Enter the full path name to the file which includes the AmlCode 339 declaration. 340 341 If unsure, don't enter a file name. 342 343config ACPI_CUSTOM_DSDT 344 bool 345 default ACPI_CUSTOM_DSDT_FILE != "" 346 347config ARCH_HAS_ACPI_TABLE_UPGRADE 348 def_bool n 349 350config ACPI_TABLE_UPGRADE 351 bool "Allow upgrading ACPI tables via initrd" 352 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 353 default y 354 help 355 This option provides functionality to upgrade arbitrary ACPI tables 356 via initrd. No functional change if no ACPI tables are passed via 357 initrd, therefore it's safe to say Y. 358 See Documentation/acpi/initrd_table_override.txt for details 359 360config ACPI_DEBUG 361 bool "Debug Statements" 362 default n 363 help 364 The ACPI subsystem can produce debug output. Saying Y enables this 365 output and increases the kernel size by around 50K. 366 367 Use the acpi.debug_layer and acpi.debug_level kernel command-line 368 parameters documented in Documentation/acpi/debug.txt and 369 Documentation/admin-guide/kernel-parameters.rst to control the type and 370 amount of debug output. 371 372config ACPI_PCI_SLOT 373 bool "PCI slot detection driver" 374 depends on SYSFS 375 default n 376 help 377 This driver creates entries in /sys/bus/pci/slots/ for all PCI 378 slots in the system. This can help correlate PCI bus addresses, 379 i.e., segment/bus/device/function tuples, with physical slots in 380 the system. If you are unsure, say N. 381 382config ACPI_CONTAINER 383 bool "Container and Module Devices" 384 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 385 help 386 This driver supports ACPI Container and Module devices (IDs 387 ACPI0004, PNP0A05, and PNP0A06). 388 389 This helps support hotplug of nodes, CPUs, and memory. 390 391 To compile this driver as a module, choose M here: 392 the module will be called container. 393 394config ACPI_HOTPLUG_MEMORY 395 bool "Memory Hotplug" 396 depends on MEMORY_HOTPLUG 397 help 398 This driver supports ACPI memory hotplug. The driver 399 fields notifications on ACPI memory devices (PNP0C80), 400 which represent memory ranges that may be onlined or 401 offlined during runtime. 402 403 If your hardware and firmware do not support adding or 404 removing memory devices at runtime, you need not enable 405 this driver. 406 407 To compile this driver as a module, choose M here: 408 the module will be called acpi_memhotplug. 409 410config ACPI_HOTPLUG_IOAPIC 411 bool 412 depends on PCI 413 depends on X86_IO_APIC 414 default y 415 416config ACPI_SBS 417 tristate "Smart Battery System" 418 depends on X86 419 select POWER_SUPPLY 420 help 421 This driver supports the Smart Battery System, another 422 type of access to battery information, found on some laptops. 423 424 To compile this driver as a module, choose M here: 425 the modules will be called sbs and sbshc. 426 427config ACPI_HED 428 tristate "Hardware Error Device" 429 help 430 This driver supports the Hardware Error Device (PNP0C33), 431 which is used to report some hardware errors notified via 432 SCI, mainly the corrected errors. 433 434config ACPI_CUSTOM_METHOD 435 tristate "Allow ACPI methods to be inserted/replaced at run time" 436 depends on DEBUG_FS 437 default n 438 help 439 This debug facility allows ACPI AML methods to be inserted and/or 440 replaced without rebooting the system. For details refer to: 441 Documentation/acpi/method-customizing.txt. 442 443 NOTE: This option is security sensitive, because it allows arbitrary 444 kernel memory to be written to by root (uid=0) users, allowing them 445 to bypass certain security measures (e.g. if root is not allowed to 446 load additional kernel modules after boot, this feature may be used 447 to override that restriction). 448 449config ACPI_BGRT 450 bool "Boottime Graphics Resource Table support" 451 depends on EFI && (X86 || ARM64) 452 help 453 This driver adds support for exposing the ACPI Boottime Graphics 454 Resource Table, which allows the operating system to obtain 455 data from the firmware boot splash. It will appear under 456 /sys/firmware/acpi/bgrt/ . 457 458config ACPI_REDUCED_HARDWARE_ONLY 459 bool "Hardware-reduced ACPI support only" if EXPERT 460 def_bool n 461 help 462 This config item changes the way the ACPI code is built. When this 463 option is selected, the kernel will use a specialized version of 464 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 465 resulting kernel will be smaller but it will also be restricted to 466 running in ACPI reduced hardware mode ONLY. 467 468 If you are unsure what to do, do not enable this option. 469 470source "drivers/acpi/nfit/Kconfig" 471 472source "drivers/acpi/apei/Kconfig" 473source "drivers/acpi/dptf/Kconfig" 474 475config ACPI_WATCHDOG 476 bool 477 478config ACPI_EXTLOG 479 tristate "Extended Error Log support" 480 depends on X86_MCE && X86_LOCAL_APIC && EDAC 481 select UEFI_CPER 482 default n 483 help 484 Certain usages such as Predictive Failure Analysis (PFA) require 485 more information about the error than what can be described in 486 processor machine check banks. Most server processors log 487 additional information about the error in processor uncore 488 registers. Since the addresses and layout of these registers vary 489 widely from one processor to another, system software cannot 490 readily make use of them. To complicate matters further, some of 491 the additional error information cannot be constructed without 492 detailed knowledge about platform topology. 493 494 Enhanced MCA Logging allows firmware to provide additional error 495 information to system software, synchronous with MCE or CMCI. This 496 driver adds support for that functionality with corresponding 497 tracepoint which carries that information to userspace. 498 499menuconfig PMIC_OPREGION 500 bool "PMIC (Power Management Integrated Circuit) operation region support" 501 help 502 Select this option to enable support for ACPI operation 503 region of the PMIC chip. The operation region can be used 504 to control power rails and sensor reading/writing on the 505 PMIC chip. 506 507if PMIC_OPREGION 508config CRC_PMIC_OPREGION 509 bool "ACPI operation region support for CrystalCove PMIC" 510 depends on INTEL_SOC_PMIC 511 help 512 This config adds ACPI operation region support for CrystalCove PMIC. 513 514config XPOWER_PMIC_OPREGION 515 bool "ACPI operation region support for XPower AXP288 PMIC" 516 depends on MFD_AXP20X_I2C 517 help 518 This config adds ACPI operation region support for XPower AXP288 PMIC. 519 520config BXT_WC_PMIC_OPREGION 521 bool "ACPI operation region support for BXT WhiskeyCove PMIC" 522 depends on INTEL_SOC_PMIC_BXTWC 523 help 524 This config adds ACPI operation region support for BXT WhiskeyCove PMIC. 525 526config CHT_WC_PMIC_OPREGION 527 bool "ACPI operation region support for CHT Whiskey Cove PMIC" 528 depends on INTEL_SOC_PMIC_CHTWC 529 help 530 This config adds ACPI operation region support for CHT Whiskey Cove PMIC. 531 532config CHT_DC_TI_PMIC_OPREGION 533 bool "ACPI operation region support for Dollar Cove TI PMIC" 534 depends on INTEL_SOC_PMIC_CHTDC_TI 535 help 536 This config adds ACPI operation region support for Dollar Cove TI PMIC. 537 538endif 539 540config ACPI_CONFIGFS 541 tristate "ACPI configfs support" 542 select CONFIGFS_FS 543 help 544 Select this option to enable support for ACPI configuration from 545 userspace. The configurable ACPI groups will be visible under 546 /config/acpi, assuming configfs is mounted under /config. 547 548if ARM64 549source "drivers/acpi/arm64/Kconfig" 550endif 551 552config TPS68470_PMIC_OPREGION 553 bool "ACPI operation region support for TPS68470 PMIC" 554 depends on MFD_TPS68470 555 help 556 This config adds ACPI operation region support for TI TPS68470 PMIC. 557 TPS68470 device is an advanced power management unit that powers 558 a Compact Camera Module (CCM), generates clocks for image sensors, 559 drives a dual LED for flash and incorporates two LED drivers for 560 general purpose indicators. 561 This driver enables ACPI operation region support control voltage 562 regulators and clocks. 563 564 This option is a bool as it provides an ACPI operation 565 region, which must be available before any of the devices 566 using this, are probed. 567 568endif # ACPI 569 570config X86_PM_TIMER 571 bool "Power Management Timer Support" if EXPERT 572 depends on X86 && (ACPI || JAILHOUSE_GUEST) 573 default y 574 help 575 The Power Management Timer is available on all ACPI-capable, 576 in most cases even if ACPI is unusable or blacklisted. 577 578 This timing source is not affected by power management features 579 like aggressive processor idling, throttling, frequency and/or 580 voltage scaling, unlike the commonly used Time Stamp Counter 581 (TSC) timing source. 582 583 You should nearly always say Y here because many modern 584 systems require this timer. 585