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  56           they have been replaced by functions in /sys.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