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 co-developed by
  35           Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
  36           The specification is available at:
  37           <http://www.acpi.info>
  38
  39 if ACPI
  40
  41 config ACPI_SLEEP
  42         bool
  43         depends on SUSPEND || HIBERNATION
  44         default y
  45
  46 config ACPI_EC_DEBUGFS
  47         tristate "EC read/write access through /sys/kernel/debug/ec"
  48         default n
  49         help
  50           Say N to disable Embedded Controller /sys/kernel/debug interface
  51
  52           Be aware that using this interface can confuse your Embedded
  53           Controller in a way that a normal reboot is not enough. You then
  54           have to power off your system, and remove the laptop battery for
  55           some seconds.
  56           An Embedded Controller typically is available on laptops and reads
  57           sensor values like battery state and temperature.
  58           The kernel accesses the EC through ACPI parsed code provided by BIOS
  59           tables. This option allows to access the EC directly without ACPI
  60           code being involved.
  61           Thus this option is a debug option that helps to write ACPI drivers
  62           and can be used to identify ACPI code or EC firmware bugs.
  63
  64 config ACPI_AC
  65         tristate "AC Adapter"
  66         depends on X86
  67         select POWER_SUPPLY
  68         default y
  69         help
  70           This driver supports the AC Adapter object, which indicates
  71           whether a system is on AC or not.  If you have a system that can
  72           switch between A/C and battery, say Y.
  73
  74           To compile this driver as a module, choose M here:
  75           the module will be called ac.
  76
  77 config ACPI_BATTERY
  78         tristate "Battery"
  79         depends on X86
  80         select POWER_SUPPLY
  81         default y
  82         help
  83           This driver adds support for battery information through
  84           /proc/acpi/battery. If you have a mobile system with a battery,
  85           say Y.
  86
  87           To compile this driver as a module, choose M here:
  88           the module will be called battery.
  89
  90 config ACPI_BUTTON
  91         tristate "Button"
  92         depends on INPUT
  93         default y
  94         help
  95           This driver handles events on the power, sleep, and lid buttons.
  96           A daemon reads events from input devices or via netlink and
  97           performs user-defined actions such as shutting down the system.
  98           This is necessary for software-controlled poweroff.
  99
 100           To compile this driver as a module, choose M here:
 101           the module will be called button.
 102
 103 config ACPI_VIDEO
 104         tristate "Video"
 105         depends on X86 && BACKLIGHT_CLASS_DEVICE
 106         depends on INPUT
 107         select THERMAL
 108         help
 109           This driver implements the ACPI Extensions For Display Adapters
 110           for integrated graphics devices on motherboard, as specified in
 111           ACPI 2.0 Specification, Appendix B.  This supports basic operations
 112           such as defining the video POST device, retrieving EDID information,
 113           and setting up a video output.
 114
 115           To compile this driver as a module, choose M here:
 116           the module will be called video.
 117
 118 config ACPI_FAN
 119         tristate "Fan"
 120         select THERMAL
 121         default y
 122         help
 123           This driver supports ACPI fan devices, allowing user-mode
 124           applications to perform basic fan control (on, off, status).
 125
 126           To compile this driver as a module, choose M here:
 127           the module will be called fan.
 128
 129 config ACPI_DOCK
 130         bool "Dock"
 131         help
 132           This driver supports ACPI-controlled docking stations and removable
 133           drive bays such as the IBM Ultrabay and the Dell Module Bay.
 134
 135 config ACPI_PROCESSOR
 136         tristate "Processor"
 137         select THERMAL
 138         select CPU_IDLE
 139         default y
 140         help
 141           This driver installs ACPI as the idle handler for Linux and uses
 142           ACPI C2 and C3 processor states to save power on systems that
 143           support it.  It is required by several flavors of cpufreq
 144           performance-state drivers.
 145
 146           To compile this driver as a module, choose M here:
 147           the module will be called processor.
 148
 149 config ACPI_IPMI
 150         tristate "IPMI"
 151         depends on IPMI_SI
 152         default n
 153         help
 154           This driver enables the ACPI to access the BMC controller. And it
 155           uses the IPMI request/response message to communicate with BMC
 156           controller, which can be found on on the server.
 157
 158           To compile this driver as a module, choose M here:
 159           the module will be called as acpi_ipmi.
 160
 161 config ACPI_HOTPLUG_CPU
 162         bool
 163         depends on ACPI_PROCESSOR && HOTPLUG_CPU
 164         select ACPI_CONTAINER
 165         default y
 166
 167 config ACPI_PROCESSOR_AGGREGATOR
 168         tristate "Processor Aggregator"
 169         depends on ACPI_PROCESSOR
 170         depends on X86
 171         help
 172           ACPI 4.0 defines processor Aggregator, which enables OS to perform
 173           specific processor configuration and control that applies to all
 174           processors in the platform. Currently only logical processor idling
 175           is defined, which is to reduce power consumption. This driver
 176           supports the new device.
 177
 178 config ACPI_THERMAL
 179         tristate "Thermal Zone"
 180         depends on ACPI_PROCESSOR
 181         select THERMAL
 182         default y
 183         help
 184           This driver supports ACPI thermal zones.  Most mobile and
 185           some desktop systems support ACPI thermal zones.  It is HIGHLY
 186           recommended that this option be enabled, as your processor(s)
 187           may be damaged without it.
 188
 189           To compile this driver as a module, choose M here:
 190           the module will be called thermal.
 191
 192 config ACPI_NUMA
 193         bool "NUMA support"
 194         depends on NUMA
 195         depends on (X86 || IA64)
 196         default y if IA64_GENERIC || IA64_SGI_SN2
 197
 198 config ACPI_CUSTOM_DSDT_FILE
 199         string "Custom DSDT Table file to include"
 200         default ""
 201         depends on !STANDALONE
 202         help
 203           This option supports a custom DSDT by linking it into the kernel.
 204           See Documentation/acpi/dsdt-override.txt
 205
 206           Enter the full path name to the file which includes the AmlCode
 207           declaration.
 208
 209           If unsure, don't enter a file name.
 210
 211 config ACPI_CUSTOM_DSDT
 212         bool
 213         default ACPI_CUSTOM_DSDT_FILE != ""
 214
 215 config ACPI_INITRD_TABLE_OVERRIDE
 216         bool "ACPI tables override via initrd"
 217         depends on BLK_DEV_INITRD && X86
 218         default n
 219         help
 220           This option provides functionality to override arbitrary ACPI tables
 221           via initrd. No functional change if no ACPI tables are passed via
 222           initrd, therefore it's safe to say Y.
 223           See Documentation/acpi/initrd_table_override.txt for details
 224
 225 config ACPI_DEBUG
 226         bool "Debug Statements"
 227         default n
 228         help
 229           The ACPI subsystem can produce debug output.  Saying Y enables this
 230           output and increases the kernel size by around 50K.
 231
 232           Use the acpi.debug_layer and acpi.debug_level kernel command-line
 233           parameters documented in Documentation/acpi/debug.txt and
 234           Documentation/kernel-parameters.txt to control the type and
 235           amount of debug output.
 236
 237 config ACPI_PCI_SLOT
 238         bool "PCI slot detection driver"
 239         depends on SYSFS
 240         default n
 241         help
 242           This driver creates entries in /sys/bus/pci/slots/ for all PCI
 243           slots in the system.  This can help correlate PCI bus addresses,
 244           i.e., segment/bus/device/function tuples, with physical slots in
 245           the system.  If you are unsure, say N.
 246
 247 config X86_PM_TIMER
 248         bool "Power Management Timer Support" if EXPERT
 249         depends on X86
 250         default y
 251         help
 252           The Power Management Timer is available on all ACPI-capable,
 253           in most cases even if ACPI is unusable or blacklisted.
 254
 255           This timing source is not affected by power management features
 256           like aggressive processor idling, throttling, frequency and/or
 257           voltage scaling, unlike the commonly used Time Stamp Counter
 258           (TSC) timing source.
 259
 260           You should nearly always say Y here because many modern
 261           systems require this timer.
 262
 263 config ACPI_CONTAINER
 264         bool "Container and Module Devices"
 265         default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
 266         help
 267           This driver supports ACPI Container and Module devices (IDs
 268           ACPI0004, PNP0A05, and PNP0A06).
 269
 270           This helps support hotplug of nodes, CPUs, and memory.
 271
 272           To compile this driver as a module, choose M here:
 273           the module will be called container.
 274
 275 config ACPI_HOTPLUG_MEMORY
 276         bool "Memory Hotplug"
 277         depends on MEMORY_HOTPLUG
 278         help
 279           This driver supports ACPI memory hotplug.  The driver
 280           fields notifications on ACPI memory devices (PNP0C80),
 281           which represent memory ranges that may be onlined or
 282           offlined during runtime.
 283
 284           If your hardware and firmware do not support adding or
 285           removing memory devices at runtime, you need not enable
 286           this driver.
 287
 288           To compile this driver as a module, choose M here:
 289           the module will be called acpi_memhotplug.
 290
 291 config ACPI_SBS
 292         tristate "Smart Battery System"
 293         depends on X86
 294         select POWER_SUPPLY
 295         help
 296           This driver supports the Smart Battery System, another
 297           type of access to battery information, found on some laptops.
 298
 299           To compile this driver as a module, choose M here:
 300           the modules will be called sbs and sbshc.
 301
 302 config ACPI_HED
 303         tristate "Hardware Error Device"
 304         help
 305           This driver supports the Hardware Error Device (PNP0C33),
 306           which is used to report some hardware errors notified via
 307           SCI, mainly the corrected errors.
 308
 309 config ACPI_CUSTOM_METHOD
 310         tristate "Allow ACPI methods to be inserted/replaced at run time"
 311         depends on DEBUG_FS
 312         default n
 313         help
 314           This debug facility allows ACPI AML methods to be inserted and/or
 315           replaced without rebooting the system. For details refer to:
 316           Documentation/acpi/method-customizing.txt.
 317
 318           NOTE: This option is security sensitive, because it allows arbitrary
 319           kernel memory to be written to by root (uid=0) users, allowing them
 320           to bypass certain security measures (e.g. if root is not allowed to
 321           load additional kernel modules after boot, this feature may be used
 322           to override that restriction).
 323
 324 config ACPI_BGRT
 325         bool "Boottime Graphics Resource Table support"
 326         depends on EFI && X86
 327         help
 328           This driver adds support for exposing the ACPI Boottime Graphics
 329           Resource Table, which allows the operating system to obtain
 330           data from the firmware boot splash. It will appear under
 331           /sys/firmware/acpi/bgrt/ .
 332
 333 config ACPI_REDUCED_HARDWARE_ONLY
 334         bool "Hardware-reduced ACPI support only" if EXPERT
 335         def_bool n
 336         depends on ACPI
 337         help
 338         This config item changes the way the ACPI code is built.  When this
 339         option is selected, the kernel will use a specialized version of
 340         ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
 341         resulting kernel will be smaller but it will also be restricted to
 342         running in ACPI reduced hardware mode ONLY.
 343
 344         If you are unsure what to do, do not enable this option.
 345
 346 source "drivers/acpi/apei/Kconfig"
 347
 348 config ACPI_EXTLOG
 349         tristate "Extended Error Log support"
 350         depends on X86_MCE && X86_LOCAL_APIC
 351         select UEFI_CPER
 352         default n
 353         help
 354           Certain usages such as Predictive Failure Analysis (PFA) require
 355           more information about the error than what can be described in
 356           processor machine check banks. Most server processors log
 357           additional information about the error in processor uncore
 358           registers. Since the addresses and layout of these registers vary
 359           widely from one processor to another, system software cannot
 360           readily make use of them. To complicate matters further, some of
 361           the additional error information cannot be constructed without
 362           detailed knowledge about platform topology.
 363
 364           Enhanced MCA Logging allows firmware to provide additional error
 365           information to system software, synchronous with MCE or CMCI. This
 366           driver adds support for that functionality.
 367
 368 endif   # ACPI