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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# ACPI Configuration
3#
4
Jan Engelhardt3f2c48c2007-07-03 01:40:59 -04005menuconfig ACPI
Frans Pop355ee5e2007-10-29 17:20:38 -04006 bool "ACPI (Advanced Configuration and Power Interface) Support"
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 depends on !IA64_HP_SIM
8 depends on IA64 || X86
Adrian Bunk13001242006-03-28 17:04:00 -05009 depends on PCI
Len Brown243b66e2007-02-15 22:34:36 -050010 select PNP
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 default y
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070012 help
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 Advanced Configuration and Power Interface (ACPI) support for
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070014 Linux requires an ACPI-compliant platform (hardware/firmware),
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 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
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070024 are configured, ACPI is used.
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070026 The project home page for the Linux ACPI subsystem is here:
Rafael J. Wysockiaaf3d292013-10-10 23:25:58 +020027 <https://01.org/linux-acpi>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
29 Linux support for ACPI is based on Intel Corporation's ACPI
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070030 Component Architecture (ACPI CA). For more information on the
31 ACPI CA, see:
32 <http://acpica.org/>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Hanjun Guoc7f52202014-04-08 20:59:48 +080034 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.
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070039 The specification is available at:
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 <http://www.acpi.info>
Hanjun Guoc7f52202014-04-08 20:59:48 +080041 <http://www.uefi.org/acpi/specs>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Len Brown3e11c3c2005-05-27 04:53:27 -040043if ACPI
44
Len Brown673d5b42007-07-28 03:33:16 -040045config ACPI_SLEEP
46 bool
Rafael J. Wysocki5d1e0722008-10-22 14:58:43 -040047 depends on SUSPEND || HIBERNATION
Len Brown673d5b42007-07-28 03:33:16 -040048 default y
49
Lan Tianyue2a7c3d2014-05-04 11:07:24 +080050config 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
Rafael J. Wysocki3afcb962014-05-10 13:51:36 +020063 deleted in the future.
Lan Tianyue2a7c3d2014-05-04 11:07:24 +080064
65 Say N to delete power /proc/acpi/ directories that have moved to /sys/
66
Thomas Renninger1195a092010-07-16 13:11:31 +020067config ACPI_EC_DEBUGFS
68 tristate "EC read/write access through /sys/kernel/debug/ec"
Thomas Renninger500de3dd2010-07-29 22:30:24 +020069 default n
Thomas Renninger1195a092010-07-16 13:11:31 +020070 help
71 Say N to disable Embedded Controller /sys/kernel/debug interface
72
Thomas Renninger500de3dd2010-07-29 22:30:24 +020073 Be aware that using this interface can confuse your Embedded
74 Controller in a way that a normal reboot is not enough. You then
Andrea Gelmini25cb1bf2010-08-18 15:22:10 +020075 have to power off your system, and remove the laptop battery for
Thomas Renninger500de3dd2010-07-29 22:30:24 +020076 some seconds.
Thomas Renninger1195a092010-07-16 13:11:31 +020077 An Embedded Controller typically is available on laptops and reads
78 sensor values like battery state and temperature.
Thomas Renninger500de3dd2010-07-29 22:30:24 +020079 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.
Thomas Renninger1195a092010-07-16 13:11:31 +020082 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070085config ACPI_AC
86 tristate "AC Adapter"
Alexey Starikovskiy5527c8b2007-10-29 17:08:59 -040087 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +080088 select POWER_SUPPLY
Len Brown07fefe42005-08-25 12:22:04 -040089 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070091 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
Len Brown07fefe42005-08-25 12:22:04 -040093 switch between A/C and battery, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -070095 To compile this driver as a module, choose M here:
96 the module will be called ac.
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098config ACPI_BATTERY
99 tristate "Battery"
Alexey Starikovskiy5527c8b2007-10-29 17:08:59 -0400100 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +0800101 select POWER_SUPPLY
Len Brown07fefe42005-08-25 12:22:04 -0400102 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 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
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700108 To compile this driver as a module, choose M here:
109 the module will be called battery.
110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111config ACPI_BUTTON
112 tristate "Button"
Dmitry Torokhovc0968f02006-11-09 00:40:13 -0500113 depends on INPUT
Len Brown07fefe42005-08-25 12:22:04 -0400114 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700116 This driver handles events on the power, sleep, and lid buttons.
Krzysztof Mazur7d13f942013-10-13 00:11:00 +0200117 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.
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700120
121 To compile this driver as a module, choose M here:
122 the module will be called button.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124config ACPI_VIDEO
125 tristate "Video"
Jean Delvare9f380fc2014-03-17 15:46:44 +0100126 depends on X86 && BACKLIGHT_CLASS_DEVICE
Andreas Herrmann03e2bf22007-09-17 23:41:05 +0200127 depends on INPUT
Zhang Rui63c4ec92008-04-21 16:07:13 +0800128 select THERMAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700130 This driver implements the ACPI Extensions For Display Adapters
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 for integrated graphics devices on motherboard, as specified in
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700132 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139config ACPI_FAN
140 tristate "Fan"
Zhang Rui63c4ec92008-04-21 16:07:13 +0800141 select THERMAL
Len Brown07fefe42005-08-25 12:22:04 -0400142 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700144 This driver supports ACPI fan devices, allowing user-mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 applications to perform basic fan control (on, off, status).
146
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700147 To compile this driver as a module, choose M here:
148 the module will be called fan.
149
Len Brownc8f7a622006-07-09 17:22:28 -0400150config ACPI_DOCK
Shaohua Li898b0542008-09-27 11:10:28 +0800151 bool "Dock"
Len Brownc8f7a622006-07-09 17:22:28 -0400152 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700153 This driver supports ACPI-controlled docking stations and removable
154 drive bays such as the IBM Ultrabay and the Dell Module Bay.
Kristen Carlson Accardi01b57e72006-10-20 14:30:25 -0700155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156config ACPI_PROCESSOR
157 tristate "Processor"
Zhang Rui63c4ec92008-04-21 16:07:13 +0800158 select THERMAL
Jean Delvarea4084c12010-10-10 14:54:52 +0200159 select CPU_IDLE
Len Brown07fefe42005-08-25 12:22:04 -0400160 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700162 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
Len Brown07fefe42005-08-25 12:22:04 -0400164 support it. It is required by several flavors of cpufreq
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700165 performance-state drivers.
166
167 To compile this driver as a module, choose M here:
168 the module will be called processor.
Lv Zheng4b88e332013-09-13 13:14:51 +0800169
Zhao Yakuie92b2972010-12-08 10:10:18 +0800170config ACPI_IPMI
171 tristate "IPMI"
Lv Zheng4b88e332013-09-13 13:14:51 +0800172 depends on IPMI_SI
Zhao Yakuie92b2972010-12-08 10:10:18 +0800173 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182config ACPI_HOTPLUG_CPU
Adrian Bunkcbfc1ba2005-07-30 04:18:00 -0400183 bool
Kees Cookf756f282013-01-16 18:53:28 -0800184 depends on ACPI_PROCESSOR && HOTPLUG_CPU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 select ACPI_CONTAINER
Adrian Bunkcbfc1ba2005-07-30 04:18:00 -0400186 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Shaohua Li8e0af512009-07-27 18:11:02 -0400188config ACPI_PROCESSOR_AGGREGATOR
189 tristate "Processor Aggregator"
190 depends on ACPI_PROCESSOR
Len Brownd91f79e2009-09-27 02:35:55 -0400191 depends on X86
Shaohua Li8e0af512009-07-27 18:11:02 -0400192 help
193 ACPI 4.0 defines processor Aggregator, which enables OS to perform
Jiri Slabyc4c4e2a2009-10-09 15:53:24 +0200194 specific processor configuration and control that applies to all
Shaohua Li8e0af512009-07-27 18:11:02 -0400195 processors in the platform. Currently only logical processor idling
196 is defined, which is to reduce power consumption. This driver
Jiri Slabyc4c4e2a2009-10-09 15:53:24 +0200197 supports the new device.
Shaohua Li8e0af512009-07-27 18:11:02 -0400198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199config ACPI_THERMAL
200 tristate "Thermal Zone"
201 depends on ACPI_PROCESSOR
Zhang Rui3f655ef2008-01-17 15:51:11 +0800202 select THERMAL
Len Brown07fefe42005-08-25 12:22:04 -0400203 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700205 This driver supports ACPI thermal zones. Most mobile and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 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
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700210 To compile this driver as a module, choose M here:
211 the module will be called thermal.
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213config ACPI_NUMA
214 bool "NUMA support"
215 depends on NUMA
Yasunori Goto762834e2006-06-23 02:03:19 -0700216 depends on (X86 || IA64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 default y if IA64_GENERIC || IA64_SGI_SN2
218
Randy Dunlap7ce95732008-02-22 11:25:04 -0800219config ACPI_CUSTOM_DSDT_FILE
220 string "Custom DSDT Table file to include"
221 default ""
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 depends on !STANDALONE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 help
Len Brownd89e9d62008-02-06 19:28:02 -0500224 This option supports a custom DSDT by linking it into the kernel.
225 See Documentation/acpi/dsdt-override.txt
226
Uwe Zeisbergerc30fe7f2006-03-24 18:23:14 +0100227 Enter the full path name to the file which includes the AmlCode
228 declaration.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Randy Dunlap7ce95732008-02-22 11:25:04 -0800230 If unsure, don't enter a file name.
231
232config ACPI_CUSTOM_DSDT
233 bool
234 default ACPI_CUSTOM_DSDT_FILE != ""
235
Thomas Renninger53aac442012-10-01 00:23:54 +0200236config ACPI_INITRD_TABLE_OVERRIDE
Thomas Renninger565d9562013-02-22 14:12:22 +0100237 bool "ACPI tables override via initrd"
238 depends on BLK_DEV_INITRD && X86
Thomas Renninger53aac442012-10-01 00:23:54 +0200239 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246config ACPI_DEBUG
247 bool "Debug Statements"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 default n
249 help
Bjorn Helgaasa0d84a92008-11-07 16:58:05 -0700250 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Alex Chiang8344b562008-06-10 15:30:42 -0600258config ACPI_PCI_SLOT
Jiang Liuab1a2e02013-01-19 00:07:42 +0800259 bool "PCI slot detection driver"
Alex Chiang268a03a2009-06-17 19:03:57 -0600260 depends on SYSFS
Alex Chiang8344b562008-06-10 15:30:42 -0600261 default n
262 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700263 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268config X86_PM_TIMER
David Rientjes6a108a12011-01-20 14:44:16 -0800269 bool "Power Management Timer Support" if EXPERT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 depends on X86
Len Brown07fefe42005-08-25 12:22:04 -0400271 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 help
273 The Power Management Timer is available on all ACPI-capable,
274 in most cases even if ACPI is unusable or blacklisted.
275
Matt LaPlantec73a6682006-10-03 22:24:43 +0200276 This timing source is not affected by power management features
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 like aggressive processor idling, throttling, frequency and/or
278 voltage scaling, unlike the commonly used Time Stamp Counter
279 (TSC) timing source.
280
Andi Kleene78256b2006-02-26 04:18:37 +0100281 You should nearly always say Y here because many modern
282 systems require this timer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
284config ACPI_CONTAINER
Linus Torvalds06991c22013-02-21 12:05:51 -0800285 bool "Container and Module Devices"
Paul Bolleea6a4582013-03-11 10:53:48 +0000286 default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU)
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700287 help
288 This driver supports ACPI Container and Module devices (IDs
289 ACPI0004, PNP0A05, and PNP0A06).
Keiichiro Tokunaga45b1b192005-03-02 00:00:00 -0500290
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700291 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296config ACPI_HOTPLUG_MEMORY
Rafael J. Wysocki0a347642013-03-03 23:18:03 +0100297 bool "Memory Hotplug"
Yasunori Gotobc02af92006-06-27 02:53:30 -0700298 depends on MEMORY_HOTPLUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700300 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700305 If your hardware and firmware do not support adding or
306 removing memory devices at runtime, you need not enable
307 this driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700309 To compile this driver as a module, choose M here:
310 the module will be called acpi_memhotplug.
Rich Townsend3f86b832006-07-01 11:36:54 -0400311
312config ACPI_SBS
Alexey Starikovskiy94f6c082007-09-26 19:43:48 +0400313 tristate "Smart Battery System"
Vladimir Lebedevb4150fc2007-03-19 17:45:50 +0300314 depends on X86
Zhang Rui1b3d4c32010-10-08 13:54:57 +0800315 select POWER_SUPPLY
Rich Townsend3f86b832006-07-01 11:36:54 -0400316 help
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700317 This driver supports the Smart Battery System, another
Alexey Starikovskiy94f6c082007-09-26 19:43:48 +0400318 type of access to battery information, found on some laptops.
Rich Townsend3f86b832006-07-01 11:36:54 -0400319
Bjorn Helgaas1c48aa32009-02-19 14:45:47 -0700320 To compile this driver as a module, choose M here:
321 the modules will be called sbs and sbshc.
322
Huang Ying801eab82010-05-18 14:35:17 +0800323config 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
Thomas Renninger526b4af2011-05-26 12:26:24 +0200330config 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
Justin P. Mattockbd1b2a52012-01-03 08:49:48 -0800335 This debug facility allows ACPI AML methods to be inserted and/or
Thomas Renninger526b4af2011-05-26 12:26:24 +0200336 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
Matthew Garrettd1ff4b12012-01-31 13:19:20 -0500345config ACPI_BGRT
Josh Triplett2223af32012-09-28 17:57:05 -0700346 bool "Boottime Graphics Resource Table support"
Tony Lucke66cd532013-04-03 13:17:20 +0200347 depends on EFI && X86
Matthew Garrettd1ff4b12012-01-31 13:19:20 -0500348 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
Al Stoneaf1ae782014-01-17 11:51:30 -0700354config 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
Huang Yinga643ce22010-05-18 14:35:12 +0800367source "drivers/acpi/apei/Kconfig"
368
Chen, Gong4b3db702013-10-21 14:29:25 -0700369config ACPI_EXTLOG
370 tristate "Extended Error Log support"
Luck, Tony9ebddac2013-11-08 14:03:33 -0800371 depends on X86_MCE && X86_LOCAL_APIC
Luck, Tony7ea6c6c2013-10-28 14:06:55 -0700372 select UEFI_CPER
Chen, Gong4b3db702013-10-21 14:29:25 -0700373 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389endif # ACPI