# SPDX-License-Identifier: GPL-2.0
#
# ACPI Configuration
#

config ARCH_SUPPORTS_ACPI
        bool

menuconfig ACPI
        bool "ACPI (Advanced Configuration and Power Interface) Support"
        depends on ARCH_SUPPORTS_ACPI
        select PNP
        select NLS
        default y if X86
        help
          Advanced Configuration and Power Interface (ACPI) support for 
          Linux requires an ACPI-compliant platform (hardware/firmware),
          and assumes the presence of OS-directed configuration and power
          management (OSPM) software.  This option will enlarge your 
          kernel by about 70K.

          Linux ACPI provides a robust functional replacement for several 
          legacy configuration and power management interfaces, including
          the Plug-and-Play BIOS specification (PnP BIOS), the 
          MultiProcessor Specification (MPS), and the Advanced Power 
          Management (APM) specification.  If both ACPI and APM support 
          are configured, ACPI is used.

          The project home page for the Linux ACPI subsystem is here:
          <https://01.org/linux-acpi>

          Linux support for ACPI is based on Intel Corporation's ACPI
          Component Architecture (ACPI CA).  For more information on the
          ACPI CA, see:
          <https://acpica.org/>

          ACPI is an open industry specification originally co-developed by
          Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
          it is developed by the ACPI Specification Working Group (ASWG) under
          the UEFI Forum and any UEFI member can join the ASWG and contribute
          to the ACPI specification.
          The specification is available at:
          <https://uefi.org/specifications>

if ACPI

config ACPI_LEGACY_TABLES_LOOKUP
        bool

config ARCH_MIGHT_HAVE_ACPI_PDC
        bool

config ACPI_GENERIC_GSI
        bool

config ACPI_SYSTEM_POWER_STATES_SUPPORT
        bool

config ACPI_CCA_REQUIRED
        bool

config ACPI_DEBUGGER
        bool "AML debugger interface"
        select ACPI_DEBUG
        help
          Enable in-kernel debugging of AML facilities: statistics,
          internal object dump, single step control method execution.
          This is still under development, currently enabling this only
          results in the compilation of the ACPICA debugger files.

if ACPI_DEBUGGER

config ACPI_DEBUGGER_USER
        tristate "Userspace debugger accessiblity"
        depends on DEBUG_FS
        help
          Export /sys/kernel/debug/acpi/acpidbg for userspace utilities
          to access the debugger functionalities.

endif

config ACPI_SPCR_TABLE
        bool "ACPI Serial Port Console Redirection Support"
        default y if X86
        help
          Enable support for Serial Port Console Redirection (SPCR) Table.
          This table provides information about the configuration of the
          earlycon console.

config ACPI_FPDT
        bool "ACPI Firmware Performance Data Table (FPDT) support"
        depends on X86_64
        help
          Enable support for the Firmware Performance Data Table (FPDT).
          This table provides information on the timing of the system
          boot, S3 suspend and S3 resume firmware code paths.

config ACPI_LPIT
        bool
        depends on X86_64
        default y

config ACPI_SLEEP
        bool
        depends on SUSPEND || HIBERNATION
        depends on ACPI_SYSTEM_POWER_STATES_SUPPORT
        default y

config ACPI_REV_OVERRIDE_POSSIBLE
        bool "Allow supported ACPI revision to be overridden"
        depends on X86
        default y
        help
          The platform firmware on some systems expects Linux to return "5" as
          the supported ACPI revision which makes it expose system configuration
          information in a special way.

          For example, based on what ACPI exports as the supported revision,
          Dell XPS 13 (2015) configures its audio device to either work in HDA
          mode or in I2S mode, where the former is supposed to be used on Linux
          until the latter is fully supported (in the kernel as well as in user
          space).

          This option enables a DMI-based quirk for the above Dell machine (so
          that HDA audio is exposed by the platform firmware to the kernel) and
          makes it possible to force the kernel to return "5" as the supported
          ACPI revision via the "acpi_rev_override" command line switch.

config ACPI_EC_DEBUGFS
        tristate "EC read/write access through /sys/kernel/debug/ec"
        help
          Say N to disable Embedded Controller /sys/kernel/debug interface

          Be aware that using this interface can confuse your Embedded
          Controller in a way that a normal reboot is not enough. You then
          have to power off your system, and remove the laptop battery for
          some seconds.
          An Embedded Controller typically is available on laptops and reads
          sensor values like battery state and temperature.
          The kernel accesses the EC through ACPI parsed code provided by BIOS
          tables. This option allows to access the EC directly without ACPI
          code being involved.
          Thus this option is a debug option that helps to write ACPI drivers
          and can be used to identify ACPI code or EC firmware bugs.

config ACPI_AC
        tristate "AC Adapter"
        select POWER_SUPPLY
        default y
        help
          This driver supports the AC Adapter object, which indicates
          whether a system is on AC or not.  If you have a system that can
          switch between A/C and battery, say Y.

          To compile this driver as a module, choose M here:
          the module will be called ac.

config ACPI_BATTERY
        tristate "Battery"
        select POWER_SUPPLY
        default y
        help
          This driver adds support for battery information through
          /proc/acpi/battery. If you have a mobile system with a battery, 
          say Y.

          To compile this driver as a module, choose M here:
          the module will be called battery.

config ACPI_BUTTON
        tristate "Button"
        depends on INPUT
        default y
        help
          This driver handles events on the power, sleep, and lid buttons.
          A daemon reads events from input devices or via netlink and
          performs user-defined actions such as shutting down the system.
          This is necessary for software-controlled poweroff.

          To compile this driver as a module, choose M here:
          the module will be called button.

config ACPI_TINY_POWER_BUTTON
        tristate "Tiny Power Button Driver"
        depends on !ACPI_BUTTON
        help
          This driver provides a tiny alternative to the ACPI Button driver.
          The tiny power button driver only handles the power button. Rather
          than notifying userspace via the input layer or a netlink event, this
          driver directly signals the init process to shut down.

          This driver is particularly suitable for cloud and VM environments,
          which use a simulated power button to initiate a controlled poweroff,
          but which may not want to run a separate userspace daemon to process
          input events.

config ACPI_TINY_POWER_BUTTON_SIGNAL
        int "Tiny Power Button Signal"
        depends on ACPI_TINY_POWER_BUTTON
        default 38
        help
          Default signal to send to init in response to the power button.

          Likely values here include 38 (SIGRTMIN+4) to power off, or 2
          (SIGINT) to simulate Ctrl+Alt+Del.

config ACPI_VIDEO
        tristate "Video"
        depends on X86 && BACKLIGHT_CLASS_DEVICE
        depends on INPUT
        select THERMAL
        help
          This driver implements the ACPI Extensions For Display Adapters
          for integrated graphics devices on motherboard, as specified in
          ACPI 2.0 Specification, Appendix B.  This supports basic operations
          such as defining the video POST device, retrieving EDID information,
          and setting up a video output.

          To compile this driver as a module, choose M here:
          the module will be called video.

config ACPI_FAN
        tristate "Fan"
        depends on THERMAL
        default y
        help
          This driver supports ACPI fan devices, allowing user-mode
          applications to perform basic fan control (on, off, status).

          To compile this driver as a module, choose M here:
          the module will be called fan.

config ACPI_TAD
        tristate "ACPI Time and Alarm (TAD) Device Support"
        depends on SYSFS && PM_SLEEP
        help
          The ACPI Time and Alarm (TAD) device is an alternative to the Real
          Time Clock (RTC).  Its wake timers allow the system to transition from
          the S3 (or optionally S4/S5) state to S0 state after a time period
          elapses.  In comparison with the RTC Alarm, the TAD provides a larger
          scale of flexibility in the wake timers.  The time capabilities of the
          TAD maintain the time of day information across platform power
          transitions, and keep track of time even when the platform is turned
          off.

config ACPI_DOCK
        bool "Dock"
        help
          This driver supports ACPI-controlled docking stations and removable
          drive bays such as the IBM Ultrabay and the Dell Module Bay.

config ACPI_CPU_FREQ_PSS
        bool
        select THERMAL

config ACPI_PROCESSOR_CSTATE
        def_bool y
        depends on ACPI_PROCESSOR
        depends on IA64 || X86

config ACPI_PROCESSOR_IDLE
        bool
        select CPU_IDLE

config ACPI_MCFG
        bool

config ACPI_CPPC_LIB
        bool
        depends on ACPI_PROCESSOR
        select MAILBOX
        select PCC
        help
          If this option is enabled, this file implements common functionality
          to parse CPPC tables as described in the ACPI 5.1+ spec. The
          routines implemented are meant to be used by other
          drivers to control CPU performance using CPPC semantics.
          If your platform does not support CPPC in firmware,
          leave this option disabled.

config ACPI_PROCESSOR
        tristate "Processor"
        depends on X86 || IA64 || ARM64 || LOONGARCH
        select ACPI_PROCESSOR_IDLE
        select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH
        default y
        help
          This driver adds support for the ACPI Processor package. It is required
          by several flavors of cpufreq performance-state, thermal, throttling and
          idle drivers.

          To compile this driver as a module, choose M here:
          the module will be called processor.

config ACPI_IPMI
        tristate "IPMI"
        depends on IPMI_HANDLER
        help
          This driver enables the ACPI to access the BMC controller. And it
          uses the IPMI request/response message to communicate with BMC
          controller, which can be found on on the server.

          To compile this driver as a module, choose M here:
          the module will be called as acpi_ipmi.

config ACPI_HOTPLUG_CPU
        bool
        depends on ACPI_PROCESSOR && HOTPLUG_CPU
        select ACPI_CONTAINER
        default y

config ACPI_PROCESSOR_AGGREGATOR
        tristate "Processor Aggregator"
        depends on ACPI_PROCESSOR
        depends on X86
        help
          ACPI 4.0 defines processor Aggregator, which enables OS to perform
          specific processor configuration and control that applies to all
          processors in the platform. Currently only logical processor idling
          is defined, which is to reduce power consumption. This driver
          supports the new device.

config ACPI_THERMAL
        tristate "Thermal Zone"
        depends on ACPI_PROCESSOR
        select THERMAL
        default y
        help
          This driver supports ACPI thermal zones.  Most mobile and
          some desktop systems support ACPI thermal zones.  It is HIGHLY
          recommended that this option be enabled, as your processor(s)
          may be damaged without it.

          To compile this driver as a module, choose M here:
          the module will be called thermal.

config ACPI_PLATFORM_PROFILE
        tristate

config ACPI_CUSTOM_DSDT_FILE
        string "Custom DSDT Table file to include"
        default ""
        depends on !STANDALONE
        help
          This option supports a custom DSDT by linking it into the kernel.
          See Documentation/admin-guide/acpi/dsdt-override.rst

          Enter the full path name to the file which includes the AmlCode
          or dsdt_aml_code declaration.

          If unsure, don't enter a file name.

config ACPI_CUSTOM_DSDT
        bool
        default ACPI_CUSTOM_DSDT_FILE != ""

config ARCH_HAS_ACPI_TABLE_UPGRADE
        def_bool n

config ACPI_TABLE_UPGRADE
        bool "Allow upgrading ACPI tables via initrd"
        depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE
        default y
        help
          This option provides functionality to upgrade arbitrary ACPI tables
          via initrd. No functional change if no ACPI tables are passed via
          initrd, therefore it's safe to say Y.
          See Documentation/admin-guide/acpi/initrd_table_override.rst for details

config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD
        bool "Override ACPI tables from built-in initrd"
        depends on ACPI_TABLE_UPGRADE
        depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION_NONE
        help
          This option provides functionality to override arbitrary ACPI tables
          from built-in uncompressed initrd.

          See Documentation/admin-guide/acpi/initrd_table_override.rst for details

config ACPI_DEBUG
        bool "Debug Statements"
        help
          The ACPI subsystem can produce debug output.  Saying Y enables this
          output and increases the kernel size by around 50K.

          Use the acpi.debug_layer and acpi.debug_level kernel command-line
          parameters documented in Documentation/firmware-guide/acpi/debug.rst and
          Documentation/admin-guide/kernel-parameters.rst to control the type and
          amount of debug output.

config ACPI_PCI_SLOT
        bool "PCI slot detection driver"
        depends on SYSFS && PCI
        help
          This driver creates entries in /sys/bus/pci/slots/ for all PCI
          slots in the system.  This can help correlate PCI bus addresses,
          i.e., segment/bus/device/function tuples, with physical slots in
          the system.  If you are unsure, say N.

config ACPI_CONTAINER
        bool "Container and Module Devices"
        default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
        help
          This driver supports ACPI Container and Module devices (IDs
          ACPI0004, PNP0A05, and PNP0A06).

          This helps support hotplug of nodes, CPUs, and memory.

config ACPI_HOTPLUG_MEMORY
        bool "Memory Hotplug"
        depends on MEMORY_HOTPLUG
        help
          This driver supports ACPI memory hotplug.  The driver
          fields notifications on ACPI memory devices (PNP0C80),
          which represent memory ranges that may be onlined or
          offlined during runtime.

          If your hardware and firmware do not support adding or
          removing memory devices at runtime, you need not enable
          this driver.

config ACPI_HOTPLUG_IOAPIC
        bool
        depends on PCI
        depends on X86_IO_APIC
        default y

config ACPI_SBS
        tristate "Smart Battery System"
        depends on X86
        select POWER_SUPPLY
        help
          This driver supports the Smart Battery System, another
          type of access to battery information, found on some laptops.

          To compile this driver as a module, choose M here:
          the modules will be called sbs and sbshc.

config ACPI_HED
        tristate "Hardware Error Device"
        help
          This driver supports the Hardware Error Device (PNP0C33),
          which is used to report some hardware errors notified via
          SCI, mainly the corrected errors.

config ACPI_CUSTOM_METHOD
        tristate "Allow ACPI methods to be inserted/replaced at run time"
        depends on DEBUG_FS
        help
          This debug facility allows ACPI AML methods to be inserted and/or
          replaced without rebooting the system. For details refer to:
          Documentation/firmware-guide/acpi/method-customizing.rst.

          NOTE: This option is security sensitive, because it allows arbitrary
          kernel memory to be written to by root (uid=0) users, allowing them
          to bypass certain security measures (e.g. if root is not allowed to
          load additional kernel modules after boot, this feature may be used
          to override that restriction).

config ACPI_BGRT
        bool "Boottime Graphics Resource Table support"
        depends on EFI && (X86 || ARM64)
        help
          This driver adds support for exposing the ACPI Boottime Graphics
          Resource Table, which allows the operating system to obtain
          data from the firmware boot splash. It will appear under
          /sys/firmware/acpi/bgrt/ .

config ACPI_REDUCED_HARDWARE_ONLY
        bool "Hardware-reduced ACPI support only" if EXPERT
        def_bool n
        help
          This config item changes the way the ACPI code is built.  When this
          option is selected, the kernel will use a specialized version of
          ACPICA that ONLY supports the ACPI "reduced hardware" mode.  The
          resulting kernel will be smaller but it will also be restricted to
          running in ACPI reduced hardware mode ONLY.

          If you are unsure what to do, do not enable this option.

source "drivers/acpi/nfit/Kconfig"
source "drivers/acpi/numa/Kconfig"
source "drivers/acpi/apei/Kconfig"
source "drivers/acpi/dptf/Kconfig"

config ACPI_WATCHDOG
        bool

config ACPI_EXTLOG
        tristate "Extended Error Log support"
        depends on X86_MCE && X86_LOCAL_APIC && EDAC
        select UEFI_CPER
        help
          Certain usages such as Predictive Failure Analysis (PFA) require
          more information about the error than what can be described in
          processor machine check banks. Most server processors log
          additional information about the error in processor uncore
          registers. Since the addresses and layout of these registers vary
          widely from one processor to another, system software cannot
          readily make use of them. To complicate matters further, some of
          the additional error information cannot be constructed without
          detailed knowledge about platform topology.

          Enhanced MCA Logging allows firmware to provide additional error
          information to system software, synchronous with MCE or CMCI. This
          driver adds support for that functionality with corresponding
          tracepoint which carries that information to userspace.

config ACPI_ADXL
        bool

config ACPI_CONFIGFS
        tristate "ACPI configfs support"
        select CONFIGFS_FS
        help
          Select this option to enable support for ACPI configuration from
          userspace. The configurable ACPI groups will be visible under
          /config/acpi, assuming configfs is mounted under /config.

if ARM64
source "drivers/acpi/arm64/Kconfig"

config ACPI_PPTT
        bool
endif

source "drivers/acpi/pmic/Kconfig"

config ACPI_VIOT
        bool

endif   # ACPI

config X86_PM_TIMER
        bool "Power Management Timer Support" if EXPERT
        depends on X86 && (ACPI || JAILHOUSE_GUEST)
        default y
        help
          The Power Management Timer is available on all ACPI-capable,
          in most cases even if ACPI is unusable or blacklisted.

          This timing source is not affected by power management features
          like aggressive processor idling, throttling, frequency and/or
          voltage scaling, unlike the commonly used Time Stamp Counter
          (TSC) timing source.

          You should nearly always say Y here because many modern
          systems require this timer.

config ACPI_PRMT
        bool "Platform Runtime Mechanism Support"
        depends on EFI && X86_64
        default y
        help
          Platform Runtime Mechanism (PRM) is a firmware interface exposing a
          set of binary executables that can be called from the AML interpreter
          or directly from device drivers.

          Say Y to enable the AML interpreter to execute the PRM code.

          While this feature is optional in principle, leaving it out may
          substantially increase computational overhead related to the
          initialization of some server systems.