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