drivers/acpi/Kconfig

   1 #
   2 # ACPI Configuration
   3 #
   4
   5 menuconfig 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
  43 if ACPI
  44
  45 config ACPI_LEGACY_TABLES_LOOKUP
  46         bool
  47
  48 config ACPI_SLEEP
  49         bool
  50         depends on SUSPEND || HIBERNATION
  51         default y
  52
  53 config ACPI_PROCFS_POWER
  54         bool "Deprecated power /proc/acpi directories"
  55         depends on PROC_FS
  56         help
  57           For backwards compatibility, this option allows
  58           deprecated power /proc/acpi/ directories to exist, even when
  59           they have been replaced by functions in /sys.
  60           The deprecated directories (and their replacements) include:
  61           /proc/acpi/battery/* (/sys/class/power_supply/*)
  62           /proc/acpi/ac_adapter/* (sys/class/power_supply/*)
  63           This option has no effect on /proc/acpi/ directories
  64           and functions, which do not yet exist in /sys
  65           This option, together with the proc directories, will be
  66           deleted in the future.
  67
  68           Say N to delete power /proc/acpi/ directories that have moved to /sys/
  69
  70 config ACPI_EC_DEBUGFS
  71         tristate "EC read/write access through /sys/kernel/debug/ec"
  72         default n
  73         help
  74           Say N to disable Embedded Controller /sys/kernel/debug interface
  75
  76           Be aware that using this interface can confuse your Embedded
  77           Controller in a way that a normal reboot is not enough. You then
  78           have to power off your system, and remove the laptop battery for
  79           some seconds.
  80           An Embedded Controller typically is available on laptops and reads
  81           sensor values like battery state and temperature.
  82           The kernel accesses the EC through ACPI parsed code provided by BIOS
  83           tables. This option allows to access the EC directly without ACPI
  84           code being involved.
  85           Thus this option is a debug option that helps to write ACPI drivers
  86           and can be used to identify ACPI code or EC firmware bugs.
  87
  88 config ACPI_AC
  89         tristate "AC Adapter"
  90         depends on X86
  91         select POWER_SUPPLY
  92         default y
  93         help
  94           This driver supports the AC Adapter object, which indicates
  95           whether a system is on AC or not.  If you have a system that can
  96           switch between A/C and battery, say Y.
  97
  98           To compile this driver as a module, choose M here:
  99           the module will be called ac.
 100
 101 config ACPI_BATTERY
 102         tristate "Battery"
 103         depends on X86
 104         select POWER_SUPPLY
 105         default y
 106         help
 107           This driver adds support for battery information through
 108           /proc/acpi/battery. If you have a mobile system with a battery,
 109           say Y.
 110
 111           To compile this driver as a module, choose M here:
 112           the module will be called battery.
 113
 114 config ACPI_BUTTON
 115         tristate "Button"
 116         depends on INPUT
 117         default y
 118         help
 119           This driver handles events on the power, sleep, and lid buttons.
 120           A daemon reads events from input devices or via netlink and
 121           performs user-defined actions such as shutting down the system.
 122           This is necessary for software-controlled poweroff.
 123
 124           To compile this driver as a module, choose M here:
 125           the module will be called button.
 126
 127 config ACPI_VIDEO
 128         tristate "Video"
 129         depends on X86 && BACKLIGHT_CLASS_DEVICE
 130         depends on INPUT
 131         select THERMAL
 132         help
 133           This driver implements the ACPI Extensions For Display Adapters
 134           for integrated graphics devices on motherboard, as specified in
 135           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 136           such as defining the video POST device, retrieving EDID information,
 137           and setting up a video output.
 138
 139           To compile this driver as a module, choose M here:
 140           the module will be called video.
 141
 142 config ACPI_FAN
 143         tristate "Fan"
 144         select THERMAL
 145         default y
 146         help
 147           This driver supports ACPI fan devices, allowing user-mode
 148           applications to perform basic fan control (on, off, status).
 149
 150           To compile this driver as a module, choose M here:
 151           the module will be called fan.
 152
 153 config ACPI_DOCK
 154         bool "Dock"
 155         help
 156           This driver supports ACPI-controlled docking stations and removable
 157           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 158
 159 config ACPI_PROCESSOR
 160         tristate "Processor"
 161         select THERMAL
 162         select CPU_IDLE
 163         default y
 164         help
 165           This driver installs ACPI as the idle handler for Linux and uses
 166           ACPI C2 and C3 processor states to save power on systems that
 167           support it.  It is required by several flavors of cpufreq
 168           performance-state drivers.
 169
 170           To compile this driver as a module, choose M here:
 171           the module will be called processor.
 172
 173 config ACPI_IPMI
 174         tristate "IPMI"
 175         depends on IPMI_SI
 176         default n
 177         help
 178           This driver enables the ACPI to access the BMC controller. And it
 179           uses the IPMI request/response message to communicate with BMC
 180           controller, which can be found on on the server.
 181
 182           To compile this driver as a module, choose M here:
 183           the module will be called as acpi_ipmi.
 184
 185 config ACPI_HOTPLUG_CPU
 186         bool
 187         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 188         select ACPI_CONTAINER
 189         default y
 190
 191 config ACPI_PROCESSOR_AGGREGATOR
 192         tristate "Processor Aggregator"
 193         depends on ACPI_PROCESSOR
 194         depends on X86
 195         help
 196           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 197           specific processor configuration and control that applies to all
 198           processors in the platform. Currently only logical processor idling
 199           is defined, which is to reduce power consumption. This driver
 200           supports the new device.
 201
 202 config ACPI_THERMAL
 203         tristate "Thermal Zone"
 204         depends on ACPI_PROCESSOR
 205         select THERMAL
 206         default y
 207         help
 208           This driver supports ACPI thermal zones.  Most mobile and
 209           some desktop systems support ACPI thermal zones.  It is HIGHLY
 210           recommended that this option be enabled, as your processor(s)
 211           may be damaged without it.
 212
 213           To compile this driver as a module, choose M here:
 214           the module will be called thermal.
 215
 216 config ACPI_NUMA
 217         bool "NUMA support"
 218         depends on NUMA
 219         depends on (X86 || IA64)
 220         default y if IA64_GENERIC || IA64_SGI_SN2
 221
 222 config ACPI_CUSTOM_DSDT_FILE
 223         string "Custom DSDT Table file to include"
 224         default ""
 225         depends on !STANDALONE
 226         help
 227           This option supports a custom DSDT by linking it into the kernel.
 228           See Documentation/acpi/dsdt-override.txt
 229
 230           Enter the full path name to the file which includes the AmlCode
 231           declaration.
 232
 233           If unsure, don't enter a file name.
 234
 235 config ACPI_CUSTOM_DSDT
 236         bool
 237         default ACPI_CUSTOM_DSDT_FILE != ""
 238
 239 config ACPI_INITRD_TABLE_OVERRIDE
 240         bool "ACPI tables override via initrd"
 241         depends on BLK_DEV_INITRD && X86
 242         default n
 243         help
 244           This option provides functionality to override arbitrary ACPI tables
 245           via initrd. No functional change if no ACPI tables are passed via
 246           initrd, therefore it's safe to say Y.
 247           See Documentation/acpi/initrd_table_override.txt for details
 248
 249 config ACPI_DEBUG
 250         bool "Debug Statements"
 251         default n
 252         help
 253           The ACPI subsystem can produce debug output.  Saying Y enables this
 254           output and increases the kernel size by around 50K.
 255
 256           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 257           parameters documented in Documentation/acpi/debug.txt and
 258           Documentation/kernel-parameters.txt to control the type and
 259           amount of debug output.
 260
 261 config ACPI_PCI_SLOT
 262         bool "PCI slot detection driver"
 263         depends on SYSFS
 264         default n
 265         help
 266           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 267           slots in the system.  This can help correlate PCI bus addresses,
 268           i.e., segment/bus/device/function tuples, with physical slots in
 269           the system.  If you are unsure, say N.
 270
 271 config X86_PM_TIMER
 272         bool "Power Management Timer Support" if EXPERT
 273         depends on X86
 274         default y
 275         help
 276           The Power Management Timer is available on all ACPI-capable,
 277           in most cases even if ACPI is unusable or blacklisted.
 278
 279           This timing source is not affected by power management features
 280           like aggressive processor idling, throttling, frequency and/or
 281           voltage scaling, unlike the commonly used Time Stamp Counter
 282           (TSC) timing source.
 283
 284           You should nearly always say Y here because many modern
 285           systems require this timer.
 286
 287 config ACPI_CONTAINER
 288         bool "Container and Module Devices"
 289         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 290         help
 291           This driver supports ACPI Container and Module devices (IDs
 292           ACPI0004, PNP0A05, and PNP0A06).
 293
 294           This helps support hotplug of nodes, CPUs, and memory.
 295
 296           To compile this driver as a module, choose M here:
 297           the module will be called container.
 298
 299 config ACPI_HOTPLUG_MEMORY
 300         bool "Memory Hotplug"
 301         depends on MEMORY_HOTPLUG
 302         help
 303           This driver supports ACPI memory hotplug.  The driver
 304           fields notifications on ACPI memory devices (PNP0C80),
 305           which represent memory ranges that may be onlined or
 306           offlined during runtime.
 307
 308           If your hardware and firmware do not support adding or
 309           removing memory devices at runtime, you need not enable
 310           this driver.
 311
 312           To compile this driver as a module, choose M here:
 313           the module will be called acpi_memhotplug.
 314
 315 config ACPI_SBS
 316         tristate "Smart Battery System"
 317         depends on X86
 318         select POWER_SUPPLY
 319         help
 320           This driver supports the Smart Battery System, another
 321           type of access to battery information, found on some laptops.
 322
 323           To compile this driver as a module, choose M here:
 324           the modules will be called sbs and sbshc.
 325
 326 config ACPI_HED
 327         tristate "Hardware Error Device"
 328         help
 329           This driver supports the Hardware Error Device (PNP0C33),
 330           which is used to report some hardware errors notified via
 331           SCI, mainly the corrected errors.
 332
 333 config ACPI_CUSTOM_METHOD
 334         tristate "Allow ACPI methods to be inserted/replaced at run time"
 335         depends on DEBUG_FS
 336         default n
 337         help
 338           This debug facility allows ACPI AML methods to be inserted and/or
 339           replaced without rebooting the system. For details refer to:
 340           Documentation/acpi/method-customizing.txt.
 341
 342           NOTE: This option is security sensitive, because it allows arbitrary
 343           kernel memory to be written to by root (uid=0) users, allowing them
 344           to bypass certain security measures (e.g. if root is not allowed to
 345           load additional kernel modules after boot, this feature may be used
 346           to override that restriction).
 347
 348 config ACPI_BGRT
 349         bool "Boottime Graphics Resource Table support"
 350         depends on EFI && X86
 351         help
 352           This driver adds support for exposing the ACPI Boottime Graphics
 353           Resource Table, which allows the operating system to obtain
 354           data from the firmware boot splash. It will appear under
 355           /sys/firmware/acpi/bgrt/ .
 356
 357 config ACPI_REDUCED_HARDWARE_ONLY
 358         bool "Hardware-reduced ACPI support only" if EXPERT
 359         def_bool n
 360         depends on ACPI
 361         help
 362         This config item changes the way the ACPI code is built.  When this
 363         option is selected, the kernel will use a specialized version of
 364         ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
 365         resulting kernel will be smaller but it will also be restricted to
 366         running in ACPI reduced hardware mode ONLY.
 367
 368         If you are unsure what to do, do not enable this option.
 369
 370 source "drivers/acpi/apei/Kconfig"
 371
 372 config ACPI_EXTLOG
 373         tristate "Extended Error Log support"
 374         depends on X86_MCE && X86_LOCAL_APIC
 375         select UEFI_CPER
 376         default n
 377         help
 378           Certain usages such as Predictive Failure Analysis (PFA) require
 379           more information about the error than what can be described in
 380           processor machine check banks. Most server processors log
 381           additional information about the error in processor uncore
 382           registers. Since the addresses and layout of these registers vary
 383           widely from one processor to another, system software cannot
 384           readily make use of them. To complicate matters further, some of
 385           the additional error information cannot be constructed without
 386           detailed knowledge about platform topology.
 387
 388           Enhanced MCA Logging allows firmware to provide additional error
 389           information to system software, synchronous with MCE or CMCI. This
 390           driver adds support for that functionality.
 391
 392 endif   # ACPI