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