Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | # |
3 | # ACPI Configuration | |
4 | # | |
5 | ||
f5d707ed AB |
6 | config ARCH_SUPPORTS_ACPI |
7 | bool | |
8 | ||
3f2c48c9 | 9 | menuconfig ACPI |
355ee5eb | 10 | bool "ACPI (Advanced Configuration and Power Interface) Support" |
2c870e61 | 11 | depends on ARCH_SUPPORTS_ACPI |
243b66e7 | 12 | select PNP |
2e61069b | 13 | select NLS |
04662bac | 14 | select CRC32 |
2c870e61 | 15 | default y if X86 |
1c48aa36 | 16 | help |
1da177e4 | 17 | Advanced Configuration and Power Interface (ACPI) support for |
1c48aa36 | 18 | Linux requires an ACPI-compliant platform (hardware/firmware), |
1da177e4 LT |
19 | and assumes the presence of OS-directed configuration and power |
20 | management (OSPM) software. This option will enlarge your | |
21 | kernel by about 70K. | |
22 | ||
23 | Linux ACPI provides a robust functional replacement for several | |
24 | legacy configuration and power management interfaces, including | |
25 | the Plug-and-Play BIOS specification (PnP BIOS), the | |
26 | MultiProcessor Specification (MPS), and the Advanced Power | |
27 | Management (APM) specification. If both ACPI and APM support | |
1c48aa36 | 28 | are configured, ACPI is used. |
1da177e4 | 29 | |
1c48aa36 | 30 | The project home page for the Linux ACPI subsystem is here: |
aaf3d29f | 31 | <https://01.org/linux-acpi> |
1da177e4 LT |
32 | |
33 | Linux support for ACPI is based on Intel Corporation's ACPI | |
1c48aa36 BH |
34 | Component Architecture (ACPI CA). For more information on the |
35 | ACPI CA, see: | |
4ce77966 | 36 | <https://acpica.org/> |
1da177e4 | 37 | |
c7f5220d HG |
38 | ACPI is an open industry specification originally co-developed by |
39 | Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently, | |
40 | it is developed by the ACPI Specification Working Group (ASWG) under | |
41 | the UEFI Forum and any UEFI member can join the ASWG and contribute | |
42 | to the ACPI specification. | |
1c48aa36 | 43 | The specification is available at: |
0585c1c0 | 44 | <https://uefi.org/specifications> |
1da177e4 | 45 | |
3e11c3ce LB |
46 | if ACPI |
47 | ||
8a1664be GG |
48 | config ACPI_LEGACY_TABLES_LOOKUP |
49 | bool | |
50 | ||
46ba51ea HG |
51 | config ARCH_MIGHT_HAVE_ACPI_PDC |
52 | bool | |
53 | ||
d8f4f161 LP |
54 | config ACPI_GENERIC_GSI |
55 | bool | |
56 | ||
6e0a0ea1 GG |
57 | config ACPI_SYSTEM_POWER_STATES_SUPPORT |
58 | bool | |
59 | ||
d0562674 SS |
60 | config ACPI_CCA_REQUIRED |
61 | bool | |
62 | ||
f64bd790 DW |
63 | config ACPI_TABLE_LIB |
64 | bool | |
65 | ||
4d946f79 | 66 | config ACPI_DEBUGGER |
8cfb0cdf | 67 | bool "AML debugger interface" |
4d946f79 LZ |
68 | select ACPI_DEBUG |
69 | help | |
836d0830 LZ |
70 | Enable in-kernel debugging of AML facilities: statistics, |
71 | internal object dump, single step control method execution. | |
4d946f79 LZ |
72 | This is still under development, currently enabling this only |
73 | results in the compilation of the ACPICA debugger files. | |
74 | ||
836d0830 LZ |
75 | if ACPI_DEBUGGER |
76 | ||
77 | config ACPI_DEBUGGER_USER | |
c117dfff | 78 | tristate "Userspace debugger accessibility" |
836d0830 LZ |
79 | depends on DEBUG_FS |
80 | help | |
81 | Export /sys/kernel/debug/acpi/acpidbg for userspace utilities | |
82 | to access the debugger functionalities. | |
83 | ||
84 | endif | |
85 | ||
ad1696f6 | 86 | config ACPI_SPCR_TABLE |
0231d000 PB |
87 | bool "ACPI Serial Port Console Redirection Support" |
88 | default y if X86 | |
89 | help | |
90 | Enable support for Serial Port Console Redirection (SPCR) Table. | |
91 | This table provides information about the configuration of the | |
92 | earlycon console. | |
ad1696f6 | 93 | |
d1eb86e5 ZR |
94 | config ACPI_FPDT |
95 | bool "ACPI Firmware Performance Data Table (FPDT) support" | |
96 | depends on X86_64 | |
97 | help | |
98 | Enable support for the Firmware Performance Data Table (FPDT). | |
99 | This table provides information on the timing of the system | |
100 | boot, S3 suspend and S3 resume firmware code paths. | |
101 | ||
eeb2d80d SP |
102 | config ACPI_LPIT |
103 | bool | |
104 | depends on X86_64 | |
105 | default y | |
106 | ||
673d5b43 LB |
107 | config ACPI_SLEEP |
108 | bool | |
5d1e072b | 109 | depends on SUSPEND || HIBERNATION |
6e0a0ea1 | 110 | depends on ACPI_SYSTEM_POWER_STATES_SUPPORT |
673d5b43 LB |
111 | default y |
112 | ||
18d78b64 | 113 | config ACPI_REV_OVERRIDE_POSSIBLE |
9165dabb | 114 | bool "Allow supported ACPI revision to be overridden" |
18d78b64 RW |
115 | depends on X86 |
116 | default y | |
117 | help | |
118 | The platform firmware on some systems expects Linux to return "5" as | |
119 | the supported ACPI revision which makes it expose system configuration | |
120 | information in a special way. | |
121 | ||
122 | For example, based on what ACPI exports as the supported revision, | |
123 | Dell XPS 13 (2015) configures its audio device to either work in HDA | |
124 | mode or in I2S mode, where the former is supposed to be used on Linux | |
125 | until the latter is fully supported (in the kernel as well as in user | |
126 | space). | |
127 | ||
128 | This option enables a DMI-based quirk for the above Dell machine (so | |
129 | that HDA audio is exposed by the platform firmware to the kernel) and | |
130 | makes it possible to force the kernel to return "5" as the supported | |
131 | ACPI revision via the "acpi_rev_override" command line switch. | |
132 | ||
1195a098 TR |
133 | config ACPI_EC_DEBUGFS |
134 | tristate "EC read/write access through /sys/kernel/debug/ec" | |
1195a098 TR |
135 | help |
136 | Say N to disable Embedded Controller /sys/kernel/debug interface | |
137 | ||
500de3dd TR |
138 | Be aware that using this interface can confuse your Embedded |
139 | Controller in a way that a normal reboot is not enough. You then | |
25cb1bfd | 140 | have to power off your system, and remove the laptop battery for |
500de3dd | 141 | some seconds. |
1195a098 TR |
142 | An Embedded Controller typically is available on laptops and reads |
143 | sensor values like battery state and temperature. | |
500de3dd TR |
144 | The kernel accesses the EC through ACPI parsed code provided by BIOS |
145 | tables. This option allows to access the EC directly without ACPI | |
146 | code being involved. | |
1195a098 TR |
147 | Thus this option is a debug option that helps to write ACPI drivers |
148 | and can be used to identify ACPI code or EC firmware bugs. | |
149 | ||
1da177e4 LT |
150 | config ACPI_AC |
151 | tristate "AC Adapter" | |
1b3d4c3b | 152 | select POWER_SUPPLY |
07fefe4c | 153 | default y |
1da177e4 | 154 | help |
1c48aa36 BH |
155 | This driver supports the AC Adapter object, which indicates |
156 | whether a system is on AC or not. If you have a system that can | |
07fefe4c | 157 | switch between A/C and battery, say Y. |
1da177e4 | 158 | |
1c48aa36 BH |
159 | To compile this driver as a module, choose M here: |
160 | the module will be called ac. | |
161 | ||
1da177e4 LT |
162 | config ACPI_BATTERY |
163 | tristate "Battery" | |
1b3d4c3b | 164 | select POWER_SUPPLY |
07fefe4c | 165 | default y |
1da177e4 LT |
166 | help |
167 | This driver adds support for battery information through | |
168 | /proc/acpi/battery. If you have a mobile system with a battery, | |
169 | say Y. | |
170 | ||
1c48aa36 BH |
171 | To compile this driver as a module, choose M here: |
172 | the module will be called battery. | |
173 | ||
1da177e4 LT |
174 | config ACPI_BUTTON |
175 | tristate "Button" | |
c0968f0e | 176 | depends on INPUT |
07fefe4c | 177 | default y |
1da177e4 | 178 | help |
1c48aa36 | 179 | This driver handles events on the power, sleep, and lid buttons. |
7d13f94c KM |
180 | A daemon reads events from input devices or via netlink and |
181 | performs user-defined actions such as shutting down the system. | |
182 | This is necessary for software-controlled poweroff. | |
1c48aa36 BH |
183 | |
184 | To compile this driver as a module, choose M here: | |
185 | the module will be called button. | |
1da177e4 | 186 | |
a1b93e89 JT |
187 | config ACPI_TINY_POWER_BUTTON |
188 | tristate "Tiny Power Button Driver" | |
189 | depends on !ACPI_BUTTON | |
190 | help | |
191 | This driver provides a tiny alternative to the ACPI Button driver. | |
192 | The tiny power button driver only handles the power button. Rather | |
193 | than notifying userspace via the input layer or a netlink event, this | |
194 | driver directly signals the init process to shut down. | |
195 | ||
196 | This driver is particularly suitable for cloud and VM environments, | |
197 | which use a simulated power button to initiate a controlled poweroff, | |
198 | but which may not want to run a separate userspace daemon to process | |
199 | input events. | |
200 | ||
201 | config ACPI_TINY_POWER_BUTTON_SIGNAL | |
202 | int "Tiny Power Button Signal" | |
203 | depends on ACPI_TINY_POWER_BUTTON | |
204 | default 38 | |
205 | help | |
206 | Default signal to send to init in response to the power button. | |
207 | ||
208 | Likely values here include 38 (SIGRTMIN+4) to power off, or 2 | |
209 | (SIGINT) to simulate Ctrl+Alt+Del. | |
210 | ||
1da177e4 LT |
211 | config ACPI_VIDEO |
212 | tristate "Video" | |
9f380fc5 | 213 | depends on X86 && BACKLIGHT_CLASS_DEVICE |
03e2bf26 | 214 | depends on INPUT |
63c4ec90 | 215 | select THERMAL |
1da177e4 | 216 | help |
1c48aa36 | 217 | This driver implements the ACPI Extensions For Display Adapters |
1da177e4 | 218 | for integrated graphics devices on motherboard, as specified in |
1c48aa36 BH |
219 | ACPI 2.0 Specification, Appendix B. This supports basic operations |
220 | such as defining the video POST device, retrieving EDID information, | |
221 | and setting up a video output. | |
222 | ||
223 | To compile this driver as a module, choose M here: | |
224 | the module will be called video. | |
1da177e4 LT |
225 | |
226 | config ACPI_FAN | |
227 | tristate "Fan" | |
d8054749 | 228 | depends on THERMAL |
07fefe4c | 229 | default y |
1da177e4 | 230 | help |
1c48aa36 | 231 | This driver supports ACPI fan devices, allowing user-mode |
1da177e4 LT |
232 | applications to perform basic fan control (on, off, status). |
233 | ||
1c48aa36 BH |
234 | To compile this driver as a module, choose M here: |
235 | the module will be called fan. | |
236 | ||
95c513ec RW |
237 | config ACPI_TAD |
238 | tristate "ACPI Time and Alarm (TAD) Device Support" | |
239 | depends on SYSFS && PM_SLEEP | |
240 | help | |
241 | The ACPI Time and Alarm (TAD) device is an alternative to the Real | |
242 | Time Clock (RTC). Its wake timers allow the system to transition from | |
243 | the S3 (or optionally S4/S5) state to S0 state after a time period | |
244 | elapses. In comparison with the RTC Alarm, the TAD provides a larger | |
245 | scale of flexibility in the wake timers. The time capabilities of the | |
246 | TAD maintain the time of day information across platform power | |
247 | transitions, and keep track of time even when the platform is turned | |
248 | off. | |
249 | ||
c8f7a62c | 250 | config ACPI_DOCK |
898b054f | 251 | bool "Dock" |
c8f7a62c | 252 | help |
1c48aa36 BH |
253 | This driver supports ACPI-controlled docking stations and removable |
254 | drive bays such as the IBM Ultrabay and the Dell Module Bay. | |
01b57e73 | 255 | |
239708a3 AC |
256 | config ACPI_CPU_FREQ_PSS |
257 | bool | |
258 | select THERMAL | |
259 | ||
35ae7133 SH |
260 | config ACPI_PROCESSOR_CSTATE |
261 | def_bool y | |
239ed06d | 262 | depends on ACPI_PROCESSOR |
35ae7133 SH |
263 | depends on IA64 || X86 |
264 | ||
5f05586c AC |
265 | config ACPI_PROCESSOR_IDLE |
266 | bool | |
267 | select CPU_IDLE | |
268 | ||
935c760e TN |
269 | config ACPI_MCFG |
270 | bool | |
271 | ||
337aadff AC |
272 | config ACPI_CPPC_LIB |
273 | bool | |
274 | depends on ACPI_PROCESSOR | |
337aadff AC |
275 | select MAILBOX |
276 | select PCC | |
277 | help | |
278 | If this option is enabled, this file implements common functionality | |
279 | to parse CPPC tables as described in the ACPI 5.1+ spec. The | |
280 | routines implemented are meant to be used by other | |
281 | drivers to control CPU performance using CPPC semantics. | |
282 | If your platform does not support CPPC in firmware, | |
283 | leave this option disabled. | |
284 | ||
1da177e4 LT |
285 | config ACPI_PROCESSOR |
286 | tristate "Processor" | |
b1121e2a | 287 | depends on X86 || IA64 || ARM64 || LOONGARCH |
8fc85c6a | 288 | select ACPI_PROCESSOR_IDLE |
b1121e2a | 289 | select ACPI_CPU_FREQ_PSS if X86 || IA64 || LOONGARCH |
07fefe4c | 290 | default y |
1da177e4 | 291 | help |
239708a3 AC |
292 | This driver adds support for the ACPI Processor package. It is required |
293 | by several flavors of cpufreq performance-state, thermal, throttling and | |
294 | idle drivers. | |
1c48aa36 BH |
295 | |
296 | To compile this driver as a module, choose M here: | |
297 | the module will be called processor. | |
4b88e330 | 298 | |
e92b297c ZY |
299 | config ACPI_IPMI |
300 | tristate "IPMI" | |
50121beb | 301 | depends on IPMI_HANDLER |
e92b297c ZY |
302 | help |
303 | This driver enables the ACPI to access the BMC controller. And it | |
304 | uses the IPMI request/response message to communicate with BMC | |
a8ab8ef4 | 305 | controller, which can be found on the server. |
e92b297c ZY |
306 | |
307 | To compile this driver as a module, choose M here: | |
308 | the module will be called as acpi_ipmi. | |
1da177e4 LT |
309 | |
310 | config ACPI_HOTPLUG_CPU | |
cbfc1bae | 311 | bool |
f756f28b | 312 | depends on ACPI_PROCESSOR && HOTPLUG_CPU |
1da177e4 | 313 | select ACPI_CONTAINER |
cbfc1bae | 314 | default y |
1da177e4 | 315 | |
8e0af514 SL |
316 | config ACPI_PROCESSOR_AGGREGATOR |
317 | tristate "Processor Aggregator" | |
318 | depends on ACPI_PROCESSOR | |
d91f79eb | 319 | depends on X86 |
8e0af514 SL |
320 | help |
321 | ACPI 4.0 defines processor Aggregator, which enables OS to perform | |
c4c4e2a5 | 322 | specific processor configuration and control that applies to all |
8e0af514 SL |
323 | processors in the platform. Currently only logical processor idling |
324 | is defined, which is to reduce power consumption. This driver | |
c4c4e2a5 | 325 | supports the new device. |
8e0af514 | 326 | |
1da177e4 LT |
327 | config ACPI_THERMAL |
328 | tristate "Thermal Zone" | |
329 | depends on ACPI_PROCESSOR | |
3f655ef8 | 330 | select THERMAL |
07fefe4c | 331 | default y |
1da177e4 | 332 | help |
1c48aa36 | 333 | This driver supports ACPI thermal zones. Most mobile and |
1da177e4 LT |
334 | some desktop systems support ACPI thermal zones. It is HIGHLY |
335 | recommended that this option be enabled, as your processor(s) | |
336 | may be damaged without it. | |
337 | ||
1c48aa36 BH |
338 | To compile this driver as a module, choose M here: |
339 | the module will be called thermal. | |
340 | ||
a2ff95e0 | 341 | config ACPI_PLATFORM_PROFILE |
21f05a43 | 342 | tristate |
a2ff95e0 | 343 | |
7ce9573e RD |
344 | config ACPI_CUSTOM_DSDT_FILE |
345 | string "Custom DSDT Table file to include" | |
346 | default "" | |
1da177e4 | 347 | depends on !STANDALONE |
1da177e4 | 348 | help |
d89e9d6b | 349 | This option supports a custom DSDT by linking it into the kernel. |
cb1aaebe | 350 | See Documentation/admin-guide/acpi/dsdt-override.rst |
d89e9d6b | 351 | |
c30fe7f7 | 352 | Enter the full path name to the file which includes the AmlCode |
82e4eb4e | 353 | or dsdt_aml_code declaration. |
1da177e4 | 354 | |
7ce9573e RD |
355 | If unsure, don't enter a file name. |
356 | ||
357 | config ACPI_CUSTOM_DSDT | |
358 | bool | |
359 | default ACPI_CUSTOM_DSDT_FILE != "" | |
360 | ||
91dda51a AM |
361 | config ARCH_HAS_ACPI_TABLE_UPGRADE |
362 | def_bool n | |
363 | ||
5d881327 LZ |
364 | config ACPI_TABLE_UPGRADE |
365 | bool "Allow upgrading ACPI tables via initrd" | |
91dda51a | 366 | depends on BLK_DEV_INITRD && ARCH_HAS_ACPI_TABLE_UPGRADE |
5d881327 | 367 | default y |
53aac44c | 368 | help |
5d881327 | 369 | This option provides functionality to upgrade arbitrary ACPI tables |
53aac44c TR |
370 | via initrd. No functional change if no ACPI tables are passed via |
371 | initrd, therefore it's safe to say Y. | |
cb1aaebe | 372 | See Documentation/admin-guide/acpi/initrd_table_override.rst for details |
53aac44c | 373 | |
98a455d9 SY |
374 | config ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD |
375 | bool "Override ACPI tables from built-in initrd" | |
376 | depends on ACPI_TABLE_UPGRADE | |
d2cbbf1f | 377 | depends on INITRAMFS_SOURCE!="" && INITRAMFS_COMPRESSION_NONE |
98a455d9 SY |
378 | help |
379 | This option provides functionality to override arbitrary ACPI tables | |
380 | from built-in uncompressed initrd. | |
381 | ||
cb1aaebe | 382 | See Documentation/admin-guide/acpi/initrd_table_override.rst for details |
98a455d9 | 383 | |
1da177e4 LT |
384 | config ACPI_DEBUG |
385 | bool "Debug Statements" | |
1da177e4 | 386 | help |
a0d84a92 BH |
387 | The ACPI subsystem can produce debug output. Saying Y enables this |
388 | output and increases the kernel size by around 50K. | |
389 | ||
390 | Use the acpi.debug_layer and acpi.debug_level kernel command-line | |
cb1aaebe | 391 | parameters documented in Documentation/firmware-guide/acpi/debug.rst and |
8c27ceff | 392 | Documentation/admin-guide/kernel-parameters.rst to control the type and |
a0d84a92 | 393 | amount of debug output. |
1da177e4 | 394 | |
8344b568 | 395 | config ACPI_PCI_SLOT |
ab1a2e03 | 396 | bool "PCI slot detection driver" |
5c6a1177 | 397 | depends on SYSFS && PCI |
8344b568 | 398 | help |
1c48aa36 BH |
399 | This driver creates entries in /sys/bus/pci/slots/ for all PCI |
400 | slots in the system. This can help correlate PCI bus addresses, | |
401 | i.e., segment/bus/device/function tuples, with physical slots in | |
402 | the system. If you are unsure, say N. | |
403 | ||
1da177e4 | 404 | config ACPI_CONTAINER |
06991c28 | 405 | bool "Container and Module Devices" |
ea6a4581 | 406 | default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) |
1c48aa36 BH |
407 | help |
408 | This driver supports ACPI Container and Module devices (IDs | |
409 | ACPI0004, PNP0A05, and PNP0A06). | |
45b1b196 | 410 | |
1c48aa36 BH |
411 | This helps support hotplug of nodes, CPUs, and memory. |
412 | ||
1da177e4 | 413 | config ACPI_HOTPLUG_MEMORY |
0a347644 | 414 | bool "Memory Hotplug" |
bc02af93 | 415 | depends on MEMORY_HOTPLUG |
1da177e4 | 416 | help |
1c48aa36 BH |
417 | This driver supports ACPI memory hotplug. The driver |
418 | fields notifications on ACPI memory devices (PNP0C80), | |
419 | which represent memory ranges that may be onlined or | |
420 | offlined during runtime. | |
1da177e4 | 421 | |
1c48aa36 BH |
422 | If your hardware and firmware do not support adding or |
423 | removing memory devices at runtime, you need not enable | |
424 | this driver. | |
1da177e4 | 425 | |
c183619b JL |
426 | config ACPI_HOTPLUG_IOAPIC |
427 | bool | |
428 | depends on PCI | |
429 | depends on X86_IO_APIC | |
430 | default y | |
431 | ||
3f86b832 | 432 | config ACPI_SBS |
94f6c086 | 433 | tristate "Smart Battery System" |
b4150fc4 | 434 | depends on X86 |
1b3d4c3b | 435 | select POWER_SUPPLY |
3f86b832 | 436 | help |
1c48aa36 | 437 | This driver supports the Smart Battery System, another |
94f6c086 | 438 | type of access to battery information, found on some laptops. |
3f86b832 | 439 | |
1c48aa36 BH |
440 | To compile this driver as a module, choose M here: |
441 | the modules will be called sbs and sbshc. | |
442 | ||
801eab81 HY |
443 | config ACPI_HED |
444 | tristate "Hardware Error Device" | |
445 | help | |
446 | This driver supports the Hardware Error Device (PNP0C33), | |
447 | which is used to report some hardware errors notified via | |
448 | SCI, mainly the corrected errors. | |
449 | ||
526b4af4 TR |
450 | config ACPI_CUSTOM_METHOD |
451 | tristate "Allow ACPI methods to be inserted/replaced at run time" | |
452 | depends on DEBUG_FS | |
526b4af4 | 453 | help |
bd1b2a55 | 454 | This debug facility allows ACPI AML methods to be inserted and/or |
526b4af4 | 455 | replaced without rebooting the system. For details refer to: |
cb1aaebe | 456 | Documentation/firmware-guide/acpi/method-customizing.rst. |
526b4af4 TR |
457 | |
458 | NOTE: This option is security sensitive, because it allows arbitrary | |
459 | kernel memory to be written to by root (uid=0) users, allowing them | |
460 | to bypass certain security measures (e.g. if root is not allowed to | |
461 | load additional kernel modules after boot, this feature may be used | |
462 | to override that restriction). | |
463 | ||
d1ff4b1c | 464 | config ACPI_BGRT |
2223af38 | 465 | bool "Boottime Graphics Resource Table support" |
6e7300cf | 466 | depends on EFI && (X86 || ARM64) |
feb17406 | 467 | help |
d1ff4b1c MG |
468 | This driver adds support for exposing the ACPI Boottime Graphics |
469 | Resource Table, which allows the operating system to obtain | |
470 | data from the firmware boot splash. It will appear under | |
471 | /sys/firmware/acpi/bgrt/ . | |
472 | ||
af1ae78a AS |
473 | config ACPI_REDUCED_HARDWARE_ONLY |
474 | bool "Hardware-reduced ACPI support only" if EXPERT | |
475 | def_bool n | |
af1ae78a | 476 | help |
99a33ffc HG |
477 | This config item changes the way the ACPI code is built. When this |
478 | option is selected, the kernel will use a specialized version of | |
479 | ACPICA that ONLY supports the ACPI "reduced hardware" mode. The | |
480 | resulting kernel will be smaller but it will also be restricted to | |
481 | running in ACPI reduced hardware mode ONLY. | |
af1ae78a | 482 | |
99a33ffc | 483 | If you are unsure what to do, do not enable this option. |
af1ae78a | 484 | |
bdf97013 | 485 | source "drivers/acpi/nfit/Kconfig" |
c710fcc5 | 486 | source "drivers/acpi/numa/Kconfig" |
a643ce20 | 487 | source "drivers/acpi/apei/Kconfig" |
6256ebd5 | 488 | source "drivers/acpi/dptf/Kconfig" |
a643ce20 | 489 | |
058dfc76 MW |
490 | config ACPI_WATCHDOG |
491 | bool | |
492 | ||
4b3db708 CG |
493 | config ACPI_EXTLOG |
494 | tristate "Extended Error Log support" | |
9613916b | 495 | depends on X86_MCE && X86_LOCAL_APIC && EDAC |
7ea6c6c1 | 496 | select UEFI_CPER |
4b3db708 CG |
497 | help |
498 | Certain usages such as Predictive Failure Analysis (PFA) require | |
499 | more information about the error than what can be described in | |
500 | processor machine check banks. Most server processors log | |
501 | additional information about the error in processor uncore | |
502 | registers. Since the addresses and layout of these registers vary | |
503 | widely from one processor to another, system software cannot | |
504 | readily make use of them. To complicate matters further, some of | |
505 | the additional error information cannot be constructed without | |
506 | detailed knowledge about platform topology. | |
507 | ||
508 | Enhanced MCA Logging allows firmware to provide additional error | |
509 | information to system software, synchronous with MCE or CMCI. This | |
2dfb7d51 CG |
510 | driver adds support for that functionality with corresponding |
511 | tracepoint which carries that information to userspace. | |
4b3db708 | 512 | |
4cf841e3 TL |
513 | config ACPI_ADXL |
514 | bool | |
515 | ||
0bf54fcd OP |
516 | config ACPI_CONFIGFS |
517 | tristate "ACPI configfs support" | |
518 | select CONFIGFS_FS | |
519 | help | |
520 | Select this option to enable support for ACPI configuration from | |
521 | userspace. The configurable ACPI groups will be visible under | |
522 | /config/acpi, assuming configfs is mounted under /config. | |
523 | ||
0db89fa2 CY |
524 | config ACPI_PFRUT |
525 | tristate "ACPI Platform Firmware Runtime Update and Telemetry" | |
526 | depends on 64BIT | |
527 | help | |
528 | This mechanism allows certain pieces of the platform firmware | |
529 | to be updated on the fly while the system is running (runtime) | |
530 | without the need to restart it, which is key in the cases when | |
531 | the system needs to be available 100% of the time and it cannot | |
532 | afford the downtime related to restarting it, or when the work | |
533 | carried out by the system is particularly important, so it cannot | |
534 | be interrupted, and it is not practical to wait until it is complete. | |
535 | ||
536 | The existing firmware code can be modified (driver update) or | |
537 | extended by adding new code to the firmware (code injection). | |
538 | ||
b0013e03 CY |
539 | Besides, the telemetry driver allows user space to fetch telemetry |
540 | data from the firmware with the help of the Platform Firmware Runtime | |
541 | Telemetry interface. | |
542 | ||
543 | To compile the drivers as modules, choose M here: | |
544 | the modules will be called pfr_update and pfr_telemetry. | |
0db89fa2 | 545 | |
88ef16d8 TN |
546 | if ARM64 |
547 | source "drivers/acpi/arm64/Kconfig" | |
0ce82232 JL |
548 | |
549 | config ACPI_PPTT | |
550 | bool | |
88ef16d8 TN |
551 | endif |
552 | ||
77e2a047 SH |
553 | config ACPI_PCC |
554 | bool "ACPI PCC Address Space" | |
555 | depends on PCC | |
556 | default y | |
557 | help | |
558 | The PCC Address Space also referred as PCC Operation Region pertains | |
559 | to the region of PCC subspace that succeeds the PCC signature. | |
560 | ||
561 | The PCC Operation Region works in conjunction with the PCC Table | |
562 | (Platform Communications Channel Table). PCC subspaces that are | |
563 | marked for use as PCC Operation Regions must not be used as PCC | |
564 | subspaces for the standard ACPI features such as CPPC, RASF, PDTT and | |
565 | MPST. These standard features must always use the PCC Table instead. | |
566 | ||
567 | Enable this feature if you want to set up and install the PCC Address | |
568 | Space handler to handle PCC OpRegion in the firmware. | |
569 | ||
fa870509 AS |
570 | source "drivers/acpi/pmic/Kconfig" |
571 | ||
3cf48554 JPB |
572 | config ACPI_VIOT |
573 | bool | |
574 | ||
1da177e4 | 575 | endif # ACPI |
87e65d05 JK |
576 | |
577 | config X86_PM_TIMER | |
578 | bool "Power Management Timer Support" if EXPERT | |
579 | depends on X86 && (ACPI || JAILHOUSE_GUEST) | |
580 | default y | |
581 | help | |
582 | The Power Management Timer is available on all ACPI-capable, | |
583 | in most cases even if ACPI is unusable or blacklisted. | |
584 | ||
585 | This timing source is not affected by power management features | |
586 | like aggressive processor idling, throttling, frequency and/or | |
587 | voltage scaling, unlike the commonly used Time Stamp Counter | |
588 | (TSC) timing source. | |
589 | ||
590 | You should nearly always say Y here because many modern | |
591 | systems require this timer. | |
cefc7ca4 EK |
592 | |
593 | config ACPI_PRMT | |
594 | bool "Platform Runtime Mechanism Support" | |
595 | depends on EFI && X86_64 | |
596 | default y | |
9b52363b RW |
597 | help |
598 | Platform Runtime Mechanism (PRM) is a firmware interface exposing a | |
599 | set of binary executables that can be called from the AML interpreter | |
600 | or directly from device drivers. | |
601 | ||
602 | Say Y to enable the AML interpreter to execute the PRM code. | |
603 | ||
604 | While this feature is optional in principle, leaving it out may | |
605 | substantially increase computational overhead related to the | |
606 | initialization of some server systems. |