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The ACPI BGRT driver accesses the BIOS logo image when it initializes. However, ACPI 5.0 (which introduces the BGRT) recommends putting the logo image in EFI boot services memory, so that the OS can reclaim that memory. Production systems follow this recommendation, breaking the ACPI BGRT driver. Move the bulk of the BGRT code to run during a new EFI late initialization phase, which occurs after switching EFI to virtual mode, and after initializing ACPI, but before freeing boot services memory. Copy the BIOS logo image to kernel memory at that point, and make it accessible to the BGRT driver. Rework the existing ACPI BGRT driver to act as a simple wrapper exposing that image (and the properties from the BGRT) via sysfs. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Link: http://lkml.kernel.org/r/93ce9f823f1c1f3bb88bdd662cce08eee7a17f5d.1348876882.git.josh@joshtriplett.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
398 lines
13 KiB
Text
398 lines
13 KiB
Text
#
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# ACPI Configuration
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#
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menuconfig ACPI
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bool "ACPI (Advanced Configuration and Power Interface) Support"
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depends on !IA64_HP_SIM
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depends on IA64 || X86
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depends on PCI
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select PNP
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default y
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help
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Advanced Configuration and Power Interface (ACPI) support for
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Linux requires an ACPI-compliant platform (hardware/firmware),
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and assumes the presence of OS-directed configuration and power
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management (OSPM) software. This option will enlarge your
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kernel by about 70K.
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Linux ACPI provides a robust functional replacement for several
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legacy configuration and power management interfaces, including
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the Plug-and-Play BIOS specification (PnP BIOS), the
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MultiProcessor Specification (MPS), and the Advanced Power
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Management (APM) specification. If both ACPI and APM support
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are configured, ACPI is used.
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The project home page for the Linux ACPI subsystem is here:
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<http://www.lesswatts.org/projects/acpi/>
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Linux support for ACPI is based on Intel Corporation's ACPI
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Component Architecture (ACPI CA). For more information on the
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ACPI CA, see:
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<http://acpica.org/>
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ACPI is an open industry specification co-developed by
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Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
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The specification is available at:
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<http://www.acpi.info>
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if ACPI
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config ACPI_SLEEP
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bool
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depends on SUSPEND || HIBERNATION
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default y
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config ACPI_PROCFS
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bool "Deprecated /proc/acpi files"
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depends on PROC_FS
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help
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For backwards compatibility, this option allows
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deprecated /proc/acpi/ files to exist, even when
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they have been replaced by functions in /sys.
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This option has no effect on /proc/acpi/ files
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and functions which do not yet exist in /sys.
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Say N to delete /proc/acpi/ files that have moved to /sys/
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config ACPI_PROCFS_POWER
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bool "Deprecated power /proc/acpi directories"
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depends on PROC_FS
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help
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For backwards compatibility, this option allows
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deprecated power /proc/acpi/ directories to exist, even when
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they have been replaced by functions in /sys.
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The deprecated directories (and their replacements) include:
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/proc/acpi/battery/* (/sys/class/power_supply/*)
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/proc/acpi/ac_adapter/* (sys/class/power_supply/*)
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This option has no effect on /proc/acpi/ directories
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and functions, which do not yet exist in /sys
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This option, together with the proc directories, will be
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deleted in 2.6.39.
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Say N to delete power /proc/acpi/ directories that have moved to /sys/
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config ACPI_EC_DEBUGFS
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tristate "EC read/write access through /sys/kernel/debug/ec"
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default n
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help
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Say N to disable Embedded Controller /sys/kernel/debug interface
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Be aware that using this interface can confuse your Embedded
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Controller in a way that a normal reboot is not enough. You then
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have to power off your system, and remove the laptop battery for
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some seconds.
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An Embedded Controller typically is available on laptops and reads
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sensor values like battery state and temperature.
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The kernel accesses the EC through ACPI parsed code provided by BIOS
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tables. This option allows to access the EC directly without ACPI
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code being involved.
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Thus this option is a debug option that helps to write ACPI drivers
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and can be used to identify ACPI code or EC firmware bugs.
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config ACPI_PROC_EVENT
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bool "Deprecated /proc/acpi/event support"
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depends on PROC_FS
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default y
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help
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A user-space daemon, acpid, typically reads /proc/acpi/event
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and handles all ACPI-generated events.
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These events are now delivered to user-space either
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via the input layer or as netlink events.
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This build option enables the old code for legacy
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user-space implementation. After some time, this will
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be moved under CONFIG_ACPI_PROCFS, and then deleted.
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Say Y here to retain the old behaviour. Say N if your
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user-space is newer than kernel 2.6.23 (September 2007).
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config ACPI_AC
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tristate "AC Adapter"
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depends on X86
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select POWER_SUPPLY
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default y
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help
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This driver supports the AC Adapter object, which indicates
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whether a system is on AC or not. If you have a system that can
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switch between A/C and battery, say Y.
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To compile this driver as a module, choose M here:
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the module will be called ac.
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config ACPI_BATTERY
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tristate "Battery"
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depends on X86
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select POWER_SUPPLY
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default y
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help
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This driver adds support for battery information through
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/proc/acpi/battery. If you have a mobile system with a battery,
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say Y.
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To compile this driver as a module, choose M here:
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the module will be called battery.
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config ACPI_BUTTON
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tristate "Button"
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depends on INPUT
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default y
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help
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This driver handles events on the power, sleep, and lid buttons.
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A daemon reads /proc/acpi/event and perform user-defined actions
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such as shutting down the system. This is necessary for
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software-controlled poweroff.
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To compile this driver as a module, choose M here:
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the module will be called button.
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config ACPI_VIDEO
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tristate "Video"
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depends on X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL
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depends on INPUT
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select THERMAL
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help
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This driver implements the ACPI Extensions For Display Adapters
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for integrated graphics devices on motherboard, as specified in
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ACPI 2.0 Specification, Appendix B. This supports basic operations
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such as defining the video POST device, retrieving EDID information,
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and setting up a video output.
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To compile this driver as a module, choose M here:
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the module will be called video.
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config ACPI_FAN
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tristate "Fan"
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select THERMAL
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default y
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help
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This driver supports ACPI fan devices, allowing user-mode
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applications to perform basic fan control (on, off, status).
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To compile this driver as a module, choose M here:
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the module will be called fan.
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config ACPI_DOCK
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bool "Dock"
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depends on EXPERIMENTAL
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help
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This driver supports ACPI-controlled docking stations and removable
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drive bays such as the IBM Ultrabay and the Dell Module Bay.
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config ACPI_PROCESSOR
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tristate "Processor"
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select THERMAL
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select CPU_IDLE
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default y
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help
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This driver installs ACPI as the idle handler for Linux and uses
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ACPI C2 and C3 processor states to save power on systems that
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support it. It is required by several flavors of cpufreq
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performance-state drivers.
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To compile this driver as a module, choose M here:
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the module will be called processor.
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config ACPI_IPMI
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tristate "IPMI"
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depends on EXPERIMENTAL && IPMI_SI && IPMI_HANDLER
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default n
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help
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This driver enables the ACPI to access the BMC controller. And it
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uses the IPMI request/response message to communicate with BMC
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controller, which can be found on on the server.
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To compile this driver as a module, choose M here:
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the module will be called as acpi_ipmi.
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config ACPI_HOTPLUG_CPU
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bool
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depends on EXPERIMENTAL && ACPI_PROCESSOR && HOTPLUG_CPU
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select ACPI_CONTAINER
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default y
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config ACPI_PROCESSOR_AGGREGATOR
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tristate "Processor Aggregator"
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depends on ACPI_PROCESSOR
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depends on EXPERIMENTAL
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depends on X86
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help
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ACPI 4.0 defines processor Aggregator, which enables OS to perform
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specific processor configuration and control that applies to all
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processors in the platform. Currently only logical processor idling
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is defined, which is to reduce power consumption. This driver
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supports the new device.
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config ACPI_THERMAL
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tristate "Thermal Zone"
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depends on ACPI_PROCESSOR
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select THERMAL
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default y
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help
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This driver supports ACPI thermal zones. Most mobile and
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some desktop systems support ACPI thermal zones. It is HIGHLY
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recommended that this option be enabled, as your processor(s)
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may be damaged without it.
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To compile this driver as a module, choose M here:
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the module will be called thermal.
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config ACPI_NUMA
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bool "NUMA support"
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depends on NUMA
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depends on (X86 || IA64)
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default y if IA64_GENERIC || IA64_SGI_SN2
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config ACPI_CUSTOM_DSDT_FILE
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string "Custom DSDT Table file to include"
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default ""
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depends on !STANDALONE
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help
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This option supports a custom DSDT by linking it into the kernel.
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See Documentation/acpi/dsdt-override.txt
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Enter the full path name to the file which includes the AmlCode
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declaration.
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If unsure, don't enter a file name.
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config ACPI_CUSTOM_DSDT
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bool
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default ACPI_CUSTOM_DSDT_FILE != ""
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config ACPI_BLACKLIST_YEAR
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int "Disable ACPI for systems before Jan 1st this year" if X86_32
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default 0
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help
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Enter a 4-digit year, e.g., 2001, to disable ACPI by default
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on platforms with DMI BIOS date before January 1st that year.
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"acpi=force" can be used to override this mechanism.
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Enter 0 to disable this mechanism and allow ACPI to
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run by default no matter what the year. (default)
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config ACPI_DEBUG
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bool "Debug Statements"
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default n
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help
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The ACPI subsystem can produce debug output. Saying Y enables this
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output and increases the kernel size by around 50K.
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Use the acpi.debug_layer and acpi.debug_level kernel command-line
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parameters documented in Documentation/acpi/debug.txt and
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Documentation/kernel-parameters.txt to control the type and
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amount of debug output.
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config ACPI_DEBUG_FUNC_TRACE
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bool "Additionally enable ACPI function tracing"
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default n
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depends on ACPI_DEBUG
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help
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ACPI Debug Statements slow down ACPI processing. Function trace
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is about half of the penalty and is rarely useful.
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config ACPI_PCI_SLOT
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tristate "PCI slot detection driver"
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depends on SYSFS
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default n
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help
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This driver creates entries in /sys/bus/pci/slots/ for all PCI
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slots in the system. This can help correlate PCI bus addresses,
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i.e., segment/bus/device/function tuples, with physical slots in
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the system. If you are unsure, say N.
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To compile this driver as a module, choose M here:
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the module will be called pci_slot.
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config X86_PM_TIMER
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bool "Power Management Timer Support" if EXPERT
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depends on X86
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default y
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help
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The Power Management Timer is available on all ACPI-capable,
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in most cases even if ACPI is unusable or blacklisted.
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This timing source is not affected by power management features
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like aggressive processor idling, throttling, frequency and/or
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voltage scaling, unlike the commonly used Time Stamp Counter
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(TSC) timing source.
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You should nearly always say Y here because many modern
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systems require this timer.
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config ACPI_CONTAINER
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tristate "Container and Module Devices (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
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help
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This driver supports ACPI Container and Module devices (IDs
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ACPI0004, PNP0A05, and PNP0A06).
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This helps support hotplug of nodes, CPUs, and memory.
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To compile this driver as a module, choose M here:
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the module will be called container.
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config ACPI_HOTPLUG_MEMORY
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tristate "Memory Hotplug"
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depends on MEMORY_HOTPLUG
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default n
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help
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This driver supports ACPI memory hotplug. The driver
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fields notifications on ACPI memory devices (PNP0C80),
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which represent memory ranges that may be onlined or
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offlined during runtime.
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If your hardware and firmware do not support adding or
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removing memory devices at runtime, you need not enable
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this driver.
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To compile this driver as a module, choose M here:
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the module will be called acpi_memhotplug.
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config ACPI_SBS
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tristate "Smart Battery System"
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depends on X86
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select POWER_SUPPLY
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help
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This driver supports the Smart Battery System, another
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type of access to battery information, found on some laptops.
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To compile this driver as a module, choose M here:
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the modules will be called sbs and sbshc.
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config ACPI_HED
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tristate "Hardware Error Device"
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help
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This driver supports the Hardware Error Device (PNP0C33),
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which is used to report some hardware errors notified via
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SCI, mainly the corrected errors.
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config ACPI_CUSTOM_METHOD
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tristate "Allow ACPI methods to be inserted/replaced at run time"
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depends on DEBUG_FS
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default n
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help
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This debug facility allows ACPI AML methods to be inserted and/or
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replaced without rebooting the system. For details refer to:
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Documentation/acpi/method-customizing.txt.
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NOTE: This option is security sensitive, because it allows arbitrary
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kernel memory to be written to by root (uid=0) users, allowing them
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to bypass certain security measures (e.g. if root is not allowed to
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load additional kernel modules after boot, this feature may be used
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to override that restriction).
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config ACPI_BGRT
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bool "Boottime Graphics Resource Table support"
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depends on EFI
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help
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This driver adds support for exposing the ACPI Boottime Graphics
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Resource Table, which allows the operating system to obtain
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data from the firmware boot splash. It will appear under
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/sys/firmware/acpi/bgrt/ .
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source "drivers/acpi/apei/Kconfig"
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endif # ACPI
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