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 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_SLEEP 52 bool 53 depends on SUSPEND || HIBERNATION 54 default y 55 56config ACPI_PROCFS_POWER 57 bool "Deprecated power /proc/acpi directories" 58 depends on PROC_FS 59 help 60 For backwards compatibility, this option allows 61 deprecated power /proc/acpi/ directories to exist, even when 62 they have been replaced by functions in /sys. 63 The deprecated directories (and their replacements) include: 64 /proc/acpi/battery/* (/sys/class/power_supply/*) 65 /proc/acpi/ac_adapter/* (sys/class/power_supply/*) 66 This option has no effect on /proc/acpi/ directories 67 and functions, which do not yet exist in /sys 68 This option, together with the proc directories, will be 69 deleted in the future. 70 71 Say N to delete power /proc/acpi/ directories that have moved to /sys/ 72 73config ACPI_EC_DEBUGFS 74 tristate "EC read/write access through /sys/kernel/debug/ec" 75 default n 76 help 77 Say N to disable Embedded Controller /sys/kernel/debug interface 78 79 Be aware that using this interface can confuse your Embedded 80 Controller in a way that a normal reboot is not enough. You then 81 have to power off your system, and remove the laptop battery for 82 some seconds. 83 An Embedded Controller typically is available on laptops and reads 84 sensor values like battery state and temperature. 85 The kernel accesses the EC through ACPI parsed code provided by BIOS 86 tables. This option allows to access the EC directly without ACPI 87 code being involved. 88 Thus this option is a debug option that helps to write ACPI drivers 89 and can be used to identify ACPI code or EC firmware bugs. 90 91config ACPI_AC 92 tristate "AC Adapter" 93 depends on X86 94 select POWER_SUPPLY 95 default y 96 help 97 This driver supports the AC Adapter object, which indicates 98 whether a system is on AC or not. If you have a system that can 99 switch between A/C and battery, say Y. 100 101 To compile this driver as a module, choose M here: 102 the module will be called ac. 103 104config ACPI_BATTERY 105 tristate "Battery" 106 depends on X86 107 select POWER_SUPPLY 108 default y 109 help 110 This driver adds support for battery information through 111 /proc/acpi/battery. If you have a mobile system with a battery, 112 say Y. 113 114 To compile this driver as a module, choose M here: 115 the module will be called battery. 116 117config ACPI_BUTTON 118 tristate "Button" 119 depends on INPUT 120 default y 121 help 122 This driver handles events on the power, sleep, and lid buttons. 123 A daemon reads events from input devices or via netlink and 124 performs user-defined actions such as shutting down the system. 125 This is necessary for software-controlled poweroff. 126 127 To compile this driver as a module, choose M here: 128 the module will be called button. 129 130config ACPI_VIDEO 131 tristate "Video" 132 depends on X86 && BACKLIGHT_CLASS_DEVICE 133 depends on INPUT 134 select THERMAL 135 help 136 This driver implements the ACPI Extensions For Display Adapters 137 for integrated graphics devices on motherboard, as specified in 138 ACPI 2.0 Specification, Appendix B. This supports basic operations 139 such as defining the video POST device, retrieving EDID information, 140 and setting up a video output. 141 142 To compile this driver as a module, choose M here: 143 the module will be called video. 144 145config ACPI_FAN 146 tristate "Fan" 147 select THERMAL 148 default y 149 help 150 This driver supports ACPI fan devices, allowing user-mode 151 applications to perform basic fan control (on, off, status). 152 153 To compile this driver as a module, choose M here: 154 the module will be called fan. 155 156config ACPI_DOCK 157 bool "Dock" 158 help 159 This driver supports ACPI-controlled docking stations and removable 160 drive bays such as the IBM Ultrabay and the Dell Module Bay. 161 162config ACPI_PROCESSOR 163 tristate "Processor" 164 select THERMAL 165 select CPU_IDLE 166 default y 167 help 168 This driver installs ACPI as the idle handler for Linux and uses 169 ACPI C2 and C3 processor states to save power on systems that 170 support it. It is required by several flavors of cpufreq 171 performance-state drivers. 172 173 To compile this driver as a module, choose M here: 174 the module will be called processor. 175 176config ACPI_IPMI 177 tristate "IPMI" 178 depends on IPMI_SI 179 default n 180 help 181 This driver enables the ACPI to access the BMC controller. And it 182 uses the IPMI request/response message to communicate with BMC 183 controller, which can be found on on the server. 184 185 To compile this driver as a module, choose M here: 186 the module will be called as acpi_ipmi. 187 188config ACPI_HOTPLUG_CPU 189 bool 190 depends on ACPI_PROCESSOR && HOTPLUG_CPU 191 select ACPI_CONTAINER 192 default y 193 194config ACPI_PROCESSOR_AGGREGATOR 195 tristate "Processor Aggregator" 196 depends on ACPI_PROCESSOR 197 depends on X86 198 help 199 ACPI 4.0 defines processor Aggregator, which enables OS to perform 200 specific processor configuration and control that applies to all 201 processors in the platform. Currently only logical processor idling 202 is defined, which is to reduce power consumption. This driver 203 supports the new device. 204 205config ACPI_THERMAL 206 tristate "Thermal Zone" 207 depends on ACPI_PROCESSOR 208 select THERMAL 209 default y 210 help 211 This driver supports ACPI thermal zones. Most mobile and 212 some desktop systems support ACPI thermal zones. It is HIGHLY 213 recommended that this option be enabled, as your processor(s) 214 may be damaged without it. 215 216 To compile this driver as a module, choose M here: 217 the module will be called thermal. 218 219config ACPI_NUMA 220 bool "NUMA support" 221 depends on NUMA 222 depends on (X86 || IA64) 223 default y if IA64_GENERIC || IA64_SGI_SN2 224 225config ACPI_CUSTOM_DSDT_FILE 226 string "Custom DSDT Table file to include" 227 default "" 228 depends on !STANDALONE 229 help 230 This option supports a custom DSDT by linking it into the kernel. 231 See Documentation/acpi/dsdt-override.txt 232 233 Enter the full path name to the file which includes the AmlCode 234 declaration. 235 236 If unsure, don't enter a file name. 237 238config ACPI_CUSTOM_DSDT 239 bool 240 default ACPI_CUSTOM_DSDT_FILE != "" 241 242config ACPI_INITRD_TABLE_OVERRIDE 243 bool "ACPI tables override via initrd" 244 depends on BLK_DEV_INITRD && X86 245 default n 246 help 247 This option provides functionality to override arbitrary ACPI tables 248 via initrd. No functional change if no ACPI tables are passed via 249 initrd, therefore it's safe to say Y. 250 See Documentation/acpi/initrd_table_override.txt for details 251 252config ACPI_DEBUG 253 bool "Debug Statements" 254 default n 255 help 256 The ACPI subsystem can produce debug output. Saying Y enables this 257 output and increases the kernel size by around 50K. 258 259 Use the acpi.debug_layer and acpi.debug_level kernel command-line 260 parameters documented in Documentation/acpi/debug.txt and 261 Documentation/kernel-parameters.txt to control the type and 262 amount of debug output. 263 264config ACPI_PCI_SLOT 265 bool "PCI slot detection driver" 266 depends on SYSFS 267 default n 268 help 269 This driver creates entries in /sys/bus/pci/slots/ for all PCI 270 slots in the system. This can help correlate PCI bus addresses, 271 i.e., segment/bus/device/function tuples, with physical slots in 272 the system. If you are unsure, say N. 273 274config X86_PM_TIMER 275 bool "Power Management Timer Support" if EXPERT 276 depends on X86 277 default y 278 help 279 The Power Management Timer is available on all ACPI-capable, 280 in most cases even if ACPI is unusable or blacklisted. 281 282 This timing source is not affected by power management features 283 like aggressive processor idling, throttling, frequency and/or 284 voltage scaling, unlike the commonly used Time Stamp Counter 285 (TSC) timing source. 286 287 You should nearly always say Y here because many modern 288 systems require this timer. 289 290config ACPI_CONTAINER 291 bool "Container and Module Devices" 292 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) 293 help 294 This driver supports ACPI Container and Module devices (IDs 295 ACPI0004, PNP0A05, and PNP0A06). 296 297 This helps support hotplug of nodes, CPUs, and memory. 298 299 To compile this driver as a module, choose M here: 300 the module will be called container. 301 302config ACPI_HOTPLUG_MEMORY 303 bool "Memory Hotplug" 304 depends on MEMORY_HOTPLUG 305 help 306 This driver supports ACPI memory hotplug. The driver 307 fields notifications on ACPI memory devices (PNP0C80), 308 which represent memory ranges that may be onlined or 309 offlined during runtime. 310 311 If your hardware and firmware do not support adding or 312 removing memory devices at runtime, you need not enable 313 this driver. 314 315 To compile this driver as a module, choose M here: 316 the module will be called acpi_memhotplug. 317 318config ACPI_SBS 319 tristate "Smart Battery System" 320 depends on X86 321 select POWER_SUPPLY 322 help 323 This driver supports the Smart Battery System, another 324 type of access to battery information, found on some laptops. 325 326 To compile this driver as a module, choose M here: 327 the modules will be called sbs and sbshc. 328 329config ACPI_HED 330 tristate "Hardware Error Device" 331 help 332 This driver supports the Hardware Error Device (PNP0C33), 333 which is used to report some hardware errors notified via 334 SCI, mainly the corrected errors. 335 336config ACPI_CUSTOM_METHOD 337 tristate "Allow ACPI methods to be inserted/replaced at run time" 338 depends on DEBUG_FS 339 default n 340 help 341 This debug facility allows ACPI AML methods to be inserted and/or 342 replaced without rebooting the system. For details refer to: 343 Documentation/acpi/method-customizing.txt. 344 345 NOTE: This option is security sensitive, because it allows arbitrary 346 kernel memory to be written to by root (uid=0) users, allowing them 347 to bypass certain security measures (e.g. if root is not allowed to 348 load additional kernel modules after boot, this feature may be used 349 to override that restriction). 350 351config ACPI_BGRT 352 bool "Boottime Graphics Resource Table support" 353 depends on EFI && X86 354 help 355 This driver adds support for exposing the ACPI Boottime Graphics 356 Resource Table, which allows the operating system to obtain 357 data from the firmware boot splash. It will appear under 358 /sys/firmware/acpi/bgrt/ . 359 360config ACPI_REDUCED_HARDWARE_ONLY 361 bool "Hardware-reduced ACPI support only" if EXPERT 362 def_bool n 363 depends on ACPI 364 help 365 This config item changes the way the ACPI code is built. When this 366 option is selected, the kernel will use a specialized version of 367 ACPICA that ONLY supports the ACPI "reduced hardware" mode. The 368 resulting kernel will be smaller but it will also be restricted to 369 running in ACPI reduced hardware mode ONLY. 370 371 If you are unsure what to do, do not enable this option. 372 373source "drivers/acpi/apei/Kconfig" 374 375config ACPI_EXTLOG 376 tristate "Extended Error Log support" 377 depends on X86_MCE && X86_LOCAL_APIC 378 select UEFI_CPER 379 select RAS 380 default n 381 help 382 Certain usages such as Predictive Failure Analysis (PFA) require 383 more information about the error than what can be described in 384 processor machine check banks. Most server processors log 385 additional information about the error in processor uncore 386 registers. Since the addresses and layout of these registers vary 387 widely from one processor to another, system software cannot 388 readily make use of them. To complicate matters further, some of 389 the additional error information cannot be constructed without 390 detailed knowledge about platform topology. 391 392 Enhanced MCA Logging allows firmware to provide additional error 393 information to system software, synchronous with MCE or CMCI. This 394 driver adds support for that functionality with corresponding 395 tracepoint which carries that information to userspace. 396 397endif # ACPI 398