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/*) 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_DOCK 221 bool "Dock" 222 help 223 This driver supports ACPI-controlled docking stations and removable 224 drive bays such as the IBM Ultrabay and the Dell Module Bay. 225 226config ACPI_CPU_FREQ_PSS 227 bool 228 select THERMAL 229 230config ACPI_PROCESSOR_CSTATE 231 def_bool y 232 depends on IA64 || X86 233 234config ACPI_PROCESSOR_IDLE 235 bool 236 select CPU_IDLE 237 238config ACPI_MCFG 239 bool 240 241config ACPI_CPPC_LIB 242 bool 243 depends on ACPI_PROCESSOR 244 select MAILBOX 245 select PCC 246 help 247 If this option is enabled, this file implements common functionality 248 to parse CPPC tables as described in the ACPI 5.1+ spec. The 249 routines implemented are meant to be used by other 250 drivers to control CPU performance using CPPC semantics. 251 If your platform does not support CPPC in firmware, 252 leave this option disabled. 253 254config ACPI_PROCESSOR 255 tristate "Processor" 256 depends on X86 || IA64 || ARM64 257 select ACPI_PROCESSOR_IDLE 258 select ACPI_CPU_FREQ_PSS if X86 || IA64 259 default y 260 help 261 This driver adds support for the ACPI Processor package. It is required 262 by several flavors of cpufreq performance-state, thermal, throttling and 263 idle drivers. 264 265 To compile this driver as a module, choose M here: 266 the module will be called processor. 267 268config ACPI_IPMI 269 tristate "IPMI" 270 depends on IPMI_HANDLER 271 default n 272 help 273 This driver enables the ACPI to access the BMC controller. And it 274 uses the IPMI request/response message to communicate with BMC 275 controller, which can be found on on the server. 276 277 To compile this driver as a module, choose M here: 278 the module will be called as acpi_ipmi. 279 280config ACPI_HOTPLUG_CPU 281 bool 282 depends on ACPI_PROCESSOR && HOTPLUG_CPU 283 select ACPI_CONTAINER 284 default y 285 286config ACPI_PROCESSOR_AGGREGATOR 287 tristate "Processor Aggregator" 288 depends on ACPI_PROCESSOR 289 depends on X86 290 help 291 ACPI 4.0 defines processor Aggregator, which enables OS to perform 292 specific processor configuration and control that applies to all 293 processors in the platform. Currently only logical processor idling 294 is defined, which is to reduce power consumption. This driver 295 supports the new device. 296 297config ACPI_THERMAL 298 tristate "Thermal Zone" 299 depends on ACPI_PROCESSOR 300 select THERMAL 301 default y 302 help 303 This driver supports ACPI thermal zones. Most mobile and 304 some desktop systems support ACPI thermal zones. It is HIGHLY 305 recommended that this option be enabled, as your processor(s) 306 may be damaged without it. 307 308 To compile this driver as a module, choose M here: 309 the module will be called thermal. 310 311config ACPI_NUMA 312 bool "NUMA support" 313 depends on NUMA 314 depends on (X86 || IA64 || ARM64) 315 default y if IA64_GENERIC || IA64_SGI_SN2 || ARM64 316 317config ACPI_CUSTOM_DSDT_FILE 318 string "Custom DSDT Table file to include" 319 default "" 320 depends on !STANDALONE 321 help 322 This option supports a custom DSDT by linking it into the kernel. 323 See Documentation/acpi/dsdt-override.txt 324 325 Enter the full path name to the file which includes the AmlCode 326 declaration. 327 328 If unsure, don't enter a file name. 329 330config ACPI_CUSTOM_DSDT 331 bool 332 default ACPI_CUSTOM_DSDT_FILE != "" 333 334config ARCH_HAS_ACPI_TABLE_UPGRADE 335 def_bool n 336 337config ACPI_TABLE_UPGRADE 338 bool "Allow upgrading ACPI tables via initrd" 339 depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE 340 default y 341 help 342 This option provides functionality to upgrade arbitrary ACPI tables 343 via initrd. No functional change if no ACPI tables are passed via 344 initrd, therefore it's safe to say Y. 345 See Documentation/acpi/initrd_table_override.txt for details 346 347config ACPI_DEBUG 348 bool "Debug Statements" 349 default n 350 help 351 The ACPI subsystem can produce debug output. Saying Y enables this 352 output and increases the kernel size by around 50K. 353 354 Use the acpi.debug_layer and acpi.debug_level kernel command-line 355 parameters documented in Documentation/acpi/debug.txt and 356 Documentation/admin-guide/kernel-parameters.rst to control the type and 357 amount of debug output. 358 359config ACPI_PCI_SLOT 360 bool "PCI slot detection driver" 361 depends on SYSFS 362 default n 363 help 364 This driver creates entries in /sys/bus/pci/slots/ for all PCI 365 slots in the system. This can help correlate PCI bus addresses, 366 i.e., segment/bus/device/function tuples, with physical slots in 367 the system. If you are unsure, say N. 368 369config ACPI_CONTAINER 370 bool "Container and Module Devices" 371 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 372 help 373 This driver supports ACPI Container and Module devices (IDs 374 ACPI0004, PNP0A05, and PNP0A06). 375 376 This helps support hotplug of nodes, CPUs, and memory. 377 378 To compile this driver as a module, choose M here: 379 the module will be called container. 380 381config ACPI_HOTPLUG_MEMORY 382 bool "Memory Hotplug" 383 depends on MEMORY_HOTPLUG 384 help 385 This driver supports ACPI memory hotplug. The driver 386 fields notifications on ACPI memory devices (PNP0C80), 387 which represent memory ranges that may be onlined or 388 offlined during runtime. 389 390 If your hardware and firmware do not support adding or 391 removing memory devices at runtime, you need not enable 392 this driver. 393 394 To compile this driver as a module, choose M here: 395 the module will be called acpi_memhotplug. 396 397config ACPI_HOTPLUG_IOAPIC 398 bool 399 depends on PCI 400 depends on X86_IO_APIC 401 default y 402 403config ACPI_SBS 404 tristate "Smart Battery System" 405 depends on X86 406 select POWER_SUPPLY 407 help 408 This driver supports the Smart Battery System, another 409 type of access to battery information, found on some laptops. 410 411 To compile this driver as a module, choose M here: 412 the modules will be called sbs and sbshc. 413 414config ACPI_HED 415 tristate "Hardware Error Device" 416 help 417 This driver supports the Hardware Error Device (PNP0C33), 418 which is used to report some hardware errors notified via 419 SCI, mainly the corrected errors. 420 421config ACPI_CUSTOM_METHOD 422 tristate "Allow ACPI methods to be inserted/replaced at run time" 423 depends on DEBUG_FS 424 default n 425 help 426 This debug facility allows ACPI AML methods to be inserted and/or 427 replaced without rebooting the system. For details refer to: 428 Documentation/acpi/method-customizing.txt. 429 430 NOTE: This option is security sensitive, because it allows arbitrary 431 kernel memory to be written to by root (uid=0) users, allowing them 432 to bypass certain security measures (e.g. if root is not allowed to 433 load additional kernel modules after boot, this feature may be used 434 to override that restriction). 435 436config ACPI_BGRT 437 bool "Boottime Graphics Resource Table support" 438 depends on EFI && (X86 || ARM64) 439 help 440 This driver adds support for exposing the ACPI Boottime Graphics 441 Resource Table, which allows the operating system to obtain 442 data from the firmware boot splash. It will appear under 443 /sys/firmware/acpi/bgrt/ . 444 445config ACPI_REDUCED_HARDWARE_ONLY 446 bool "Hardware-reduced ACPI support only" if EXPERT 447 def_bool n 448 help 449 This config item changes the way the ACPI code is built. When this 450 option is selected, the kernel will use a specialized version of 451 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 452 resulting kernel will be smaller but it will also be restricted to 453 running in ACPI reduced hardware mode ONLY. 454 455 If you are unsure what to do, do not enable this option. 456 457source "drivers/acpi/nfit/Kconfig" 458 459source "drivers/acpi/apei/Kconfig" 460source "drivers/acpi/dptf/Kconfig" 461 462config ACPI_WATCHDOG 463 bool 464 465config ACPI_EXTLOG 466 tristate "Extended Error Log support" 467 depends on X86_MCE && X86_LOCAL_APIC && EDAC 468 select UEFI_CPER 469 default n 470 help 471 Certain usages such as Predictive Failure Analysis (PFA) require 472 more information about the error than what can be described in 473 processor machine check banks. Most server processors log 474 additional information about the error in processor uncore 475 registers. Since the addresses and layout of these registers vary 476 widely from one processor to another, system software cannot 477 readily make use of them. To complicate matters further, some of 478 the additional error information cannot be constructed without 479 detailed knowledge about platform topology. 480 481 Enhanced MCA Logging allows firmware to provide additional error 482 information to system software, synchronous with MCE or CMCI. This 483 driver adds support for that functionality with corresponding 484 tracepoint which carries that information to userspace. 485 486menuconfig PMIC_OPREGION 487 bool "PMIC (Power Management Integrated Circuit) operation region support" 488 help 489 Select this option to enable support for ACPI operation 490 region of the PMIC chip. The operation region can be used 491 to control power rails and sensor reading/writing on the 492 PMIC chip. 493 494if PMIC_OPREGION 495config CRC_PMIC_OPREGION 496 bool "ACPI operation region support for CrystalCove PMIC" 497 depends on INTEL_SOC_PMIC 498 help 499 This config adds ACPI operation region support for CrystalCove PMIC. 500 501config XPOWER_PMIC_OPREGION 502 bool "ACPI operation region support for XPower AXP288 PMIC" 503 depends on MFD_AXP20X_I2C 504 help 505 This config adds ACPI operation region support for XPower AXP288 PMIC. 506 507config BXT_WC_PMIC_OPREGION 508 bool "ACPI operation region support for BXT WhiskeyCove PMIC" 509 depends on INTEL_SOC_PMIC_BXTWC 510 help 511 This config adds ACPI operation region support for BXT WhiskeyCove PMIC. 512 513config CHT_WC_PMIC_OPREGION 514 bool "ACPI operation region support for CHT Whiskey Cove PMIC" 515 depends on INTEL_SOC_PMIC_CHTWC 516 help 517 This config adds ACPI operation region support for CHT Whiskey Cove PMIC. 518 519config CHT_DC_TI_PMIC_OPREGION 520 bool "ACPI operation region support for Dollar Cove TI PMIC" 521 depends on INTEL_SOC_PMIC_CHTDC_TI 522 help 523 This config adds ACPI operation region support for Dollar Cove TI PMIC. 524 525endif 526 527config ACPI_CONFIGFS 528 tristate "ACPI configfs support" 529 select CONFIGFS_FS 530 help 531 Select this option to enable support for ACPI configuration from 532 userspace. The configurable ACPI groups will be visible under 533 /config/acpi, assuming configfs is mounted under /config. 534 535if ARM64 536source "drivers/acpi/arm64/Kconfig" 537endif 538 539config TPS68470_PMIC_OPREGION 540 bool "ACPI operation region support for TPS68470 PMIC" 541 depends on MFD_TPS68470 542 help 543 This config adds ACPI operation region support for TI TPS68470 PMIC. 544 TPS68470 device is an advanced power management unit that powers 545 a Compact Camera Module (CCM), generates clocks for image sensors, 546 drives a dual LED for flash and incorporates two LED drivers for 547 general purpose indicators. 548 This driver enables ACPI operation region support control voltage 549 regulators and clocks. 550 551 This option is a bool as it provides an ACPI operation 552 region, which must be available before any of the devices 553 using this, are probed. 554 555endif # ACPI 556 557config X86_PM_TIMER 558 bool "Power Management Timer Support" if EXPERT 559 depends on X86 && (ACPI || JAILHOUSE_GUEST) 560 default y 561 help 562 The Power Management Timer is available on all ACPI-capable, 563 in most cases even if ACPI is unusable or blacklisted. 564 565 This timing source is not affected by power management features 566 like aggressive processor idling, throttling, frequency and/or 567 voltage scaling, unlike the commonly used Time Stamp Counter 568 (TSC) timing source. 569 570 You should nearly always say Y here because many modern 571 systems require this timer. 572