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 && EXPERT) 9 depends on PCI 10 select PNP 11 default y 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 "In-kernel debugger (EXPERIMENTAL)" 62 select ACPI_DEBUG 63 help 64 Enable in-kernel debugging facilities: statistics, internal 65 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 69config ACPI_SLEEP 70 bool 71 depends on SUSPEND || HIBERNATION 72 depends on ACPI_SYSTEM_POWER_STATES_SUPPORT 73 default y 74 75config ACPI_PROCFS_POWER 76 bool "Deprecated power /proc/acpi directories" 77 depends on X86 && PROC_FS 78 help 79 For backwards compatibility, this option allows 80 deprecated power /proc/acpi/ directories to exist, even when 81 they have been replaced by functions in /sys. 82 The deprecated directories (and their replacements) include: 83 /proc/acpi/battery/* (/sys/class/power_supply/*) 84 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 85 This option has no effect on /proc/acpi/ directories 86 and functions, which do not yet exist in /sys 87 This option, together with the proc directories, will be 88 deleted in the future. 89 90 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 91 92config ACPI_REV_OVERRIDE_POSSIBLE 93 bool "Allow supported ACPI revision to be overriden" 94 depends on X86 95 default y 96 help 97 The platform firmware on some systems expects Linux to return "5" as 98 the supported ACPI revision which makes it expose system configuration 99 information in a special way. 100 101 For example, based on what ACPI exports as the supported revision, 102 Dell XPS 13 (2015) configures its audio device to either work in HDA 103 mode or in I2S mode, where the former is supposed to be used on Linux 104 until the latter is fully supported (in the kernel as well as in user 105 space). 106 107 This option enables a DMI-based quirk for the above Dell machine (so 108 that HDA audio is exposed by the platform firmware to the kernel) and 109 makes it possible to force the kernel to return "5" as the supported 110 ACPI revision via the "acpi_rev_override" command line switch. 111 112config ACPI_EC_DEBUGFS 113 tristate "EC read/write access through /sys/kernel/debug/ec" 114 default n 115 help 116 Say N to disable Embedded Controller /sys/kernel/debug interface 117 118 Be aware that using this interface can confuse your Embedded 119 Controller in a way that a normal reboot is not enough. You then 120 have to power off your system, and remove the laptop battery for 121 some seconds. 122 An Embedded Controller typically is available on laptops and reads 123 sensor values like battery state and temperature. 124 The kernel accesses the EC through ACPI parsed code provided by BIOS 125 tables. This option allows to access the EC directly without ACPI 126 code being involved. 127 Thus this option is a debug option that helps to write ACPI drivers 128 and can be used to identify ACPI code or EC firmware bugs. 129 130config ACPI_AC 131 tristate "AC Adapter" 132 depends on X86 133 select POWER_SUPPLY 134 default y 135 help 136 This driver supports the AC Adapter object, which indicates 137 whether a system is on AC or not. If you have a system that can 138 switch between A/C and battery, say Y. 139 140 To compile this driver as a module, choose M here: 141 the module will be called ac. 142 143config ACPI_BATTERY 144 tristate "Battery" 145 depends on X86 146 select POWER_SUPPLY 147 default y 148 help 149 This driver adds support for battery information through 150 /proc/acpi/battery. If you have a mobile system with a battery, 151 say Y. 152 153 To compile this driver as a module, choose M here: 154 the module will be called battery. 155 156config ACPI_BUTTON 157 tristate "Button" 158 depends on INPUT 159 default y 160 help 161 This driver handles events on the power, sleep, and lid buttons. 162 A daemon reads events from input devices or via netlink and 163 performs user-defined actions such as shutting down the system. 164 This is necessary for software-controlled poweroff. 165 166 To compile this driver as a module, choose M here: 167 the module will be called button. 168 169config ACPI_VIDEO 170 tristate "Video" 171 depends on X86 && BACKLIGHT_CLASS_DEVICE 172 depends on INPUT 173 select THERMAL 174 help 175 This driver implements the ACPI Extensions For Display Adapters 176 for integrated graphics devices on motherboard, as specified in 177 ACPI 2.0 Specification, Appendix B. This supports basic operations 178 such as defining the video POST device, retrieving EDID information, 179 and setting up a video output. 180 181 To compile this driver as a module, choose M here: 182 the module will be called video. 183 184config ACPI_FAN 185 tristate "Fan" 186 depends on THERMAL 187 default y 188 help 189 This driver supports ACPI fan devices, allowing user-mode 190 applications to perform basic fan control (on, off, status). 191 192 To compile this driver as a module, choose M here: 193 the module will be called fan. 194 195config ACPI_DOCK 196 bool "Dock" 197 help 198 This driver supports ACPI-controlled docking stations and removable 199 drive bays such as the IBM Ultrabay and the Dell Module Bay. 200 201config ACPI_CPU_FREQ_PSS 202 bool 203 select THERMAL 204 205config ACPI_PROCESSOR_IDLE 206 bool 207 select CPU_IDLE 208 209config ACPI_CPPC_LIB 210 bool 211 depends on ACPI_PROCESSOR 212 depends on !ACPI_CPU_FREQ_PSS 213 select MAILBOX 214 select PCC 215 help 216 If this option is enabled, this file implements common functionality 217 to parse CPPC tables as described in the ACPI 5.1+ spec. The 218 routines implemented are meant to be used by other 219 drivers to control CPU performance using CPPC semantics. 220 If your platform does not support CPPC in firmware, 221 leave this option disabled. 222 223config ACPI_PROCESSOR 224 tristate "Processor" 225 depends on X86 || IA64 || ARM64 226 select ACPI_PROCESSOR_IDLE if X86 || IA64 227 select ACPI_CPU_FREQ_PSS if X86 || IA64 228 default y 229 help 230 This driver adds support for the ACPI Processor package. It is required 231 by several flavors of cpufreq performance-state, thermal, throttling and 232 idle drivers. 233 234 To compile this driver as a module, choose M here: 235 the module will be called processor. 236 237config ACPI_IPMI 238 tristate "IPMI" 239 depends on IPMI_SI 240 default n 241 help 242 This driver enables the ACPI to access the BMC controller. And it 243 uses the IPMI request/response message to communicate with BMC 244 controller, which can be found on on the server. 245 246 To compile this driver as a module, choose M here: 247 the module will be called as acpi_ipmi. 248 249config ACPI_HOTPLUG_CPU 250 bool 251 depends on ACPI_PROCESSOR && HOTPLUG_CPU 252 select ACPI_CONTAINER 253 default y 254 255config ACPI_PROCESSOR_AGGREGATOR 256 tristate "Processor Aggregator" 257 depends on ACPI_PROCESSOR 258 depends on X86 259 help 260 ACPI 4.0 defines processor Aggregator, which enables OS to perform 261 specific processor configuration and control that applies to all 262 processors in the platform. Currently only logical processor idling 263 is defined, which is to reduce power consumption. This driver 264 supports the new device. 265 266config ACPI_THERMAL 267 tristate "Thermal Zone" 268 depends on ACPI_PROCESSOR 269 select THERMAL 270 default y 271 help 272 This driver supports ACPI thermal zones. Most mobile and 273 some desktop systems support ACPI thermal zones. It is HIGHLY 274 recommended that this option be enabled, as your processor(s) 275 may be damaged without it. 276 277 To compile this driver as a module, choose M here: 278 the module will be called thermal. 279 280config ACPI_NUMA 281 bool "NUMA support" 282 depends on NUMA 283 depends on (X86 || IA64) 284 default y if IA64_GENERIC || IA64_SGI_SN2 285 286config ACPI_CUSTOM_DSDT_FILE 287 string "Custom DSDT Table file to include" 288 default "" 289 depends on !STANDALONE 290 help 291 This option supports a custom DSDT by linking it into the kernel. 292 See Documentation/acpi/dsdt-override.txt 293 294 Enter the full path name to the file which includes the AmlCode 295 declaration. 296 297 If unsure, don't enter a file name. 298 299config ACPI_CUSTOM_DSDT 300 bool 301 default ACPI_CUSTOM_DSDT_FILE != "" 302 303config ACPI_INITRD_TABLE_OVERRIDE 304 bool "ACPI tables override via initrd" 305 depends on BLK_DEV_INITRD && X86 306 default n 307 help 308 This option provides functionality to override arbitrary ACPI tables 309 via initrd. No functional change if no ACPI tables are passed via 310 initrd, therefore it's safe to say Y. 311 See Documentation/acpi/initrd_table_override.txt for details 312 313config ACPI_DEBUG 314 bool "Debug Statements" 315 default n 316 help 317 The ACPI subsystem can produce debug output. Saying Y enables this 318 output and increases the kernel size by around 50K. 319 320 Use the acpi.debug_layer and acpi.debug_level kernel command-line 321 parameters documented in Documentation/acpi/debug.txt and 322 Documentation/kernel-parameters.txt to control the type and 323 amount of debug output. 324 325config ACPI_PCI_SLOT 326 bool "PCI slot detection driver" 327 depends on SYSFS 328 default n 329 help 330 This driver creates entries in /sys/bus/pci/slots/ for all PCI 331 slots in the system. This can help correlate PCI bus addresses, 332 i.e., segment/bus/device/function tuples, with physical slots in 333 the system. If you are unsure, say N. 334 335config X86_PM_TIMER 336 bool "Power Management Timer Support" if EXPERT 337 depends on X86 338 default y 339 help 340 The Power Management Timer is available on all ACPI-capable, 341 in most cases even if ACPI is unusable or blacklisted. 342 343 This timing source is not affected by power management features 344 like aggressive processor idling, throttling, frequency and/or 345 voltage scaling, unlike the commonly used Time Stamp Counter 346 (TSC) timing source. 347 348 You should nearly always say Y here because many modern 349 systems require this timer. 350 351config ACPI_CONTAINER 352 bool "Container and Module Devices" 353 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 354 help 355 This driver supports ACPI Container and Module devices (IDs 356 ACPI0004, PNP0A05, and PNP0A06). 357 358 This helps support hotplug of nodes, CPUs, and memory. 359 360 To compile this driver as a module, choose M here: 361 the module will be called container. 362 363config ACPI_HOTPLUG_MEMORY 364 bool "Memory Hotplug" 365 depends on MEMORY_HOTPLUG 366 help 367 This driver supports ACPI memory hotplug. The driver 368 fields notifications on ACPI memory devices (PNP0C80), 369 which represent memory ranges that may be onlined or 370 offlined during runtime. 371 372 If your hardware and firmware do not support adding or 373 removing memory devices at runtime, you need not enable 374 this driver. 375 376 To compile this driver as a module, choose M here: 377 the module will be called acpi_memhotplug. 378 379config ACPI_HOTPLUG_IOAPIC 380 bool 381 depends on PCI 382 depends on X86_IO_APIC 383 default y 384 385config ACPI_SBS 386 tristate "Smart Battery System" 387 depends on X86 388 select POWER_SUPPLY 389 help 390 This driver supports the Smart Battery System, another 391 type of access to battery information, found on some laptops. 392 393 To compile this driver as a module, choose M here: 394 the modules will be called sbs and sbshc. 395 396config ACPI_HED 397 tristate "Hardware Error Device" 398 help 399 This driver supports the Hardware Error Device (PNP0C33), 400 which is used to report some hardware errors notified via 401 SCI, mainly the corrected errors. 402 403config ACPI_CUSTOM_METHOD 404 tristate "Allow ACPI methods to be inserted/replaced at run time" 405 depends on DEBUG_FS 406 default n 407 help 408 This debug facility allows ACPI AML methods to be inserted and/or 409 replaced without rebooting the system. For details refer to: 410 Documentation/acpi/method-customizing.txt. 411 412 NOTE: This option is security sensitive, because it allows arbitrary 413 kernel memory to be written to by root (uid=0) users, allowing them 414 to bypass certain security measures (e.g. if root is not allowed to 415 load additional kernel modules after boot, this feature may be used 416 to override that restriction). 417 418config ACPI_BGRT 419 bool "Boottime Graphics Resource Table support" 420 depends on EFI && X86 421 help 422 This driver adds support for exposing the ACPI Boottime Graphics 423 Resource Table, which allows the operating system to obtain 424 data from the firmware boot splash. It will appear under 425 /sys/firmware/acpi/bgrt/ . 426 427config ACPI_REDUCED_HARDWARE_ONLY 428 bool "Hardware-reduced ACPI support only" if EXPERT 429 def_bool n 430 help 431 This config item changes the way the ACPI code is built. When this 432 option is selected, the kernel will use a specialized version of 433 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 434 resulting kernel will be smaller but it will also be restricted to 435 running in ACPI reduced hardware mode ONLY. 436 437 If you are unsure what to do, do not enable this option. 438 439config ACPI_NFIT 440 tristate "ACPI NVDIMM Firmware Interface Table (NFIT)" 441 depends on PHYS_ADDR_T_64BIT 442 depends on BLK_DEV 443 depends on ARCH_HAS_MMIO_FLUSH 444 select LIBNVDIMM 445 help 446 Infrastructure to probe ACPI 6 compliant platforms for 447 NVDIMMs (NFIT) and register a libnvdimm device tree. In 448 addition to storage devices this also enables libnvdimm to pass 449 ACPI._DSM messages for platform/dimm configuration. 450 451 To compile this driver as a module, choose M here: 452 the module will be called nfit. 453 454config ACPI_NFIT_DEBUG 455 bool "NFIT DSM debug" 456 depends on ACPI_NFIT 457 depends on DYNAMIC_DEBUG 458 default n 459 help 460 Enabling this option causes the nfit driver to dump the 461 input and output buffers of _DSM operations on the ACPI0012 462 device and its children. This can be very verbose, so leave 463 it disabled unless you are debugging a hardware / firmware 464 issue. 465 466source "drivers/acpi/apei/Kconfig" 467 468config ACPI_EXTLOG 469 tristate "Extended Error Log support" 470 depends on X86_MCE && X86_LOCAL_APIC 471 select UEFI_CPER 472 select RAS 473 default n 474 help 475 Certain usages such as Predictive Failure Analysis (PFA) require 476 more information about the error than what can be described in 477 processor machine check banks. Most server processors log 478 additional information about the error in processor uncore 479 registers. Since the addresses and layout of these registers vary 480 widely from one processor to another, system software cannot 481 readily make use of them. To complicate matters further, some of 482 the additional error information cannot be constructed without 483 detailed knowledge about platform topology. 484 485 Enhanced MCA Logging allows firmware to provide additional error 486 information to system software, synchronous with MCE or CMCI. This 487 driver adds support for that functionality with corresponding 488 tracepoint which carries that information to userspace. 489 490menuconfig PMIC_OPREGION 491 bool "PMIC (Power Management Integrated Circuit) operation region support" 492 help 493 Select this option to enable support for ACPI operation 494 region of the PMIC chip. The operation region can be used 495 to control power rails and sensor reading/writing on the 496 PMIC chip. 497 498if PMIC_OPREGION 499config CRC_PMIC_OPREGION 500 bool "ACPI operation region support for CrystalCove PMIC" 501 depends on INTEL_SOC_PMIC 502 help 503 This config adds ACPI operation region support for CrystalCove PMIC. 504 505config XPOWER_PMIC_OPREGION 506 bool "ACPI operation region support for XPower AXP288 PMIC" 507 depends on AXP288_ADC = y 508 help 509 This config adds ACPI operation region support for XPower AXP288 PMIC. 510 511endif 512 513endif # ACPI 514