xref: /linux/drivers/acpi/Kconfig (revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2)
1*1da177e4SLinus Torvalds#
2*1da177e4SLinus Torvalds# ACPI Configuration
3*1da177e4SLinus Torvalds#
4*1da177e4SLinus Torvalds
5*1da177e4SLinus Torvaldsmenu "ACPI (Advanced Configuration and Power Interface) Support"
6*1da177e4SLinus Torvalds	depends on !X86_VISWS
7*1da177e4SLinus Torvalds	depends on !IA64_HP_SIM
8*1da177e4SLinus Torvalds	depends on IA64 || X86
9*1da177e4SLinus Torvalds
10*1da177e4SLinus Torvaldsconfig ACPI
11*1da177e4SLinus Torvalds	bool "ACPI Support"
12*1da177e4SLinus Torvalds	depends on IA64 || X86
13*1da177e4SLinus Torvalds
14*1da177e4SLinus Torvalds	default y
15*1da177e4SLinus Torvalds	---help---
16*1da177e4SLinus Torvalds	  Advanced Configuration and Power Interface (ACPI) support for
17*1da177e4SLinus Torvalds	  Linux requires an ACPI compliant platform (hardware/firmware),
18*1da177e4SLinus Torvalds	  and assumes the presence of OS-directed configuration and power
19*1da177e4SLinus Torvalds	  management (OSPM) software.  This option will enlarge your
20*1da177e4SLinus Torvalds	  kernel by about 70K.
21*1da177e4SLinus Torvalds
22*1da177e4SLinus Torvalds	  Linux ACPI provides a robust functional replacement for several
23*1da177e4SLinus Torvalds	  legacy configuration and power management interfaces, including
24*1da177e4SLinus Torvalds	  the Plug-and-Play BIOS specification (PnP BIOS), the
25*1da177e4SLinus Torvalds	  MultiProcessor Specification (MPS), and the Advanced Power
26*1da177e4SLinus Torvalds	  Management (APM) specification.  If both ACPI and APM support
27*1da177e4SLinus Torvalds	  are configured, whichever is loaded first shall be used.
28*1da177e4SLinus Torvalds
29*1da177e4SLinus Torvalds	  The ACPI SourceForge project contains the latest source code,
30*1da177e4SLinus Torvalds	  documentation, tools, mailing list subscription, and other
31*1da177e4SLinus Torvalds	  information.  This project is available at:
32*1da177e4SLinus Torvalds	  <http://sourceforge.net/projects/acpi>
33*1da177e4SLinus Torvalds
34*1da177e4SLinus Torvalds	  Linux support for ACPI is based on Intel Corporation's ACPI
35*1da177e4SLinus Torvalds	  Component Architecture (ACPI CA).  For more information see:
36*1da177e4SLinus Torvalds	  <http://developer.intel.com/technology/iapc/acpi>
37*1da177e4SLinus Torvalds
38*1da177e4SLinus Torvalds	  ACPI is an open industry specification co-developed by Compaq,
39*1da177e4SLinus Torvalds	  Intel, Microsoft, Phoenix, and Toshiba.  The specification is
40*1da177e4SLinus Torvalds	  available at:
41*1da177e4SLinus Torvalds	  <http://www.acpi.info>
42*1da177e4SLinus Torvalds
43*1da177e4SLinus Torvaldsconfig ACPI_BOOT
44*1da177e4SLinus Torvalds	bool
45*1da177e4SLinus Torvalds	depends on ACPI || X86_HT
46*1da177e4SLinus Torvalds	default y
47*1da177e4SLinus Torvalds
48*1da177e4SLinus Torvaldsif ACPI
49*1da177e4SLinus Torvalds
50*1da177e4SLinus Torvaldsconfig ACPI_INTERPRETER
51*1da177e4SLinus Torvalds	bool
52*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
53*1da177e4SLinus Torvalds	default y
54*1da177e4SLinus Torvalds
55*1da177e4SLinus Torvaldsif ACPI_INTERPRETER
56*1da177e4SLinus Torvalds
57*1da177e4SLinus Torvaldsconfig ACPI_SLEEP
58*1da177e4SLinus Torvalds	bool "Sleep States (EXPERIMENTAL)"
59*1da177e4SLinus Torvalds	depends on X86
60*1da177e4SLinus Torvalds	depends on EXPERIMENTAL && PM
61*1da177e4SLinus Torvalds	default y
62*1da177e4SLinus Torvalds	---help---
63*1da177e4SLinus Torvalds	  This option adds support for ACPI suspend states.
64*1da177e4SLinus Torvalds
65*1da177e4SLinus Torvalds	  With this option, you will be able to put the system "to sleep".
66*1da177e4SLinus Torvalds	  Sleep states are low power states for the system and devices. All
67*1da177e4SLinus Torvalds	  of the system operating state is saved to either memory or disk
68*1da177e4SLinus Torvalds	  (depending on the state), to allow the system to resume operation
69*1da177e4SLinus Torvalds	  quickly at your request.
70*1da177e4SLinus Torvalds
71*1da177e4SLinus Torvalds	  Although this option sounds really nifty, barely any of the device
72*1da177e4SLinus Torvalds	  drivers have been converted to the new driver model and hence few
73*1da177e4SLinus Torvalds	  have proper power management support.
74*1da177e4SLinus Torvalds
75*1da177e4SLinus Torvalds	  This option is not recommended for anyone except those doing driver
76*1da177e4SLinus Torvalds	  power management development.
77*1da177e4SLinus Torvalds
78*1da177e4SLinus Torvaldsconfig ACPI_SLEEP_PROC_FS
79*1da177e4SLinus Torvalds	bool
80*1da177e4SLinus Torvalds	depends on ACPI_SLEEP && PROC_FS
81*1da177e4SLinus Torvalds	default y
82*1da177e4SLinus Torvalds
83*1da177e4SLinus Torvaldsconfig ACPI_AC
84*1da177e4SLinus Torvalds	tristate "AC Adapter"
85*1da177e4SLinus Torvalds	depends on X86
86*1da177e4SLinus Torvalds	default m
87*1da177e4SLinus Torvalds	help
88*1da177e4SLinus Torvalds	  This driver adds support for the AC Adapter object, which indicates
89*1da177e4SLinus Torvalds	  whether a system is on AC, or not.  Typically, only mobile systems
90*1da177e4SLinus Torvalds	  have this object, since desktops are always on AC.
91*1da177e4SLinus Torvalds
92*1da177e4SLinus Torvaldsconfig ACPI_BATTERY
93*1da177e4SLinus Torvalds	tristate "Battery"
94*1da177e4SLinus Torvalds	depends on X86
95*1da177e4SLinus Torvalds	default m
96*1da177e4SLinus Torvalds	help
97*1da177e4SLinus Torvalds	  This driver adds support for battery information through
98*1da177e4SLinus Torvalds	  /proc/acpi/battery. If you have a mobile system with a battery,
99*1da177e4SLinus Torvalds	  say Y.
100*1da177e4SLinus Torvalds
101*1da177e4SLinus Torvaldsconfig ACPI_BUTTON
102*1da177e4SLinus Torvalds	tristate "Button"
103*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
104*1da177e4SLinus Torvalds	default m
105*1da177e4SLinus Torvalds	help
106*1da177e4SLinus Torvalds	  This driver registers for events based on buttons, such as the
107*1da177e4SLinus Torvalds	  power, sleep, and lid switch.  In the future, a daemon will read
108*1da177e4SLinus Torvalds	  /proc/acpi/event and perform user-defined actions such as shutting
109*1da177e4SLinus Torvalds	  down the system.  Until then, you can cat it, and see output when
110*1da177e4SLinus Torvalds	  a button is pressed.
111*1da177e4SLinus Torvalds
112*1da177e4SLinus Torvaldsconfig ACPI_VIDEO
113*1da177e4SLinus Torvalds	tristate "Video"
114*1da177e4SLinus Torvalds	depends on EXPERIMENTAL
115*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
116*1da177e4SLinus Torvalds	default m
117*1da177e4SLinus Torvalds	help
118*1da177e4SLinus Torvalds	  This driver implement the ACPI Extensions For Display Adapters
119*1da177e4SLinus Torvalds	  for integrated graphics devices on motherboard, as specified in
120*1da177e4SLinus Torvalds	  ACPI 2.0 Specification, Appendix B, allowing to perform some basic
121*1da177e4SLinus Torvalds	  control like defining the video POST device, retrieving EDID information
122*1da177e4SLinus Torvalds	  or to setup a video output, etc.
123*1da177e4SLinus Torvalds	  Note that this is an ref. implementation only.  It may or may not work
124*1da177e4SLinus Torvalds	  for your integrated video device.
125*1da177e4SLinus Torvalds
126*1da177e4SLinus Torvaldsconfig ACPI_FAN
127*1da177e4SLinus Torvalds	tristate "Fan"
128*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
129*1da177e4SLinus Torvalds	default m
130*1da177e4SLinus Torvalds	help
131*1da177e4SLinus Torvalds	  This driver adds support for ACPI fan devices, allowing user-mode
132*1da177e4SLinus Torvalds	  applications to perform basic fan control (on, off, status).
133*1da177e4SLinus Torvalds
134*1da177e4SLinus Torvaldsconfig ACPI_PROCESSOR
135*1da177e4SLinus Torvalds	tristate "Processor"
136*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
137*1da177e4SLinus Torvalds	default m
138*1da177e4SLinus Torvalds	help
139*1da177e4SLinus Torvalds	  This driver installs ACPI as the idle handler for Linux, and uses
140*1da177e4SLinus Torvalds	  ACPI C2 and C3 processor states to save power, on systems that
141*1da177e4SLinus Torvalds	  support it.
142*1da177e4SLinus Torvalds
143*1da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_CPU
144*1da177e4SLinus Torvalds	bool "Processor Hotplug (EXPERIMENTAL)"
145*1da177e4SLinus Torvalds	depends on ACPI_PROCESSOR && HOTPLUG_CPU && EXPERIMENTAL
146*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
147*1da177e4SLinus Torvalds	select ACPI_CONTAINER
148*1da177e4SLinus Torvalds	default n
149*1da177e4SLinus Torvalds	 ---help---
150*1da177e4SLinus Torvalds	 Select this option if your platform support physical CPU hotplug.
151*1da177e4SLinus Torvalds
152*1da177e4SLinus Torvaldsconfig ACPI_THERMAL
153*1da177e4SLinus Torvalds	tristate "Thermal Zone"
154*1da177e4SLinus Torvalds	depends on ACPI_PROCESSOR
155*1da177e4SLinus Torvalds	default m
156*1da177e4SLinus Torvalds	help
157*1da177e4SLinus Torvalds	  This driver adds support for ACPI thermal zones.  Most mobile and
158*1da177e4SLinus Torvalds	  some desktop systems support ACPI thermal zones.  It is HIGHLY
159*1da177e4SLinus Torvalds	  recommended that this option be enabled, as your processor(s)
160*1da177e4SLinus Torvalds	  may be damaged without it.
161*1da177e4SLinus Torvalds
162*1da177e4SLinus Torvaldsconfig ACPI_NUMA
163*1da177e4SLinus Torvalds	bool "NUMA support"
164*1da177e4SLinus Torvalds	depends on NUMA
165*1da177e4SLinus Torvalds	depends on (IA64 || X86_64)
166*1da177e4SLinus Torvalds	default y if IA64_GENERIC || IA64_SGI_SN2
167*1da177e4SLinus Torvalds
168*1da177e4SLinus Torvaldsconfig ACPI_ASUS
169*1da177e4SLinus Torvalds        tristate "ASUS/Medion Laptop Extras"
170*1da177e4SLinus Torvalds	depends on X86
171*1da177e4SLinus Torvalds	default m
172*1da177e4SLinus Torvalds        ---help---
173*1da177e4SLinus Torvalds          This driver provides support for extra features of ACPI-compatible
174*1da177e4SLinus Torvalds          ASUS laptops. As some of Medion laptops are made by ASUS, it may also
175*1da177e4SLinus Torvalds          support some Medion laptops (such as 9675 for example).  It makes all
176*1da177e4SLinus Torvalds          the extra buttons generate standard ACPI events that go through
177*1da177e4SLinus Torvalds          /proc/acpi/events, and (on some models) adds support for changing the
178*1da177e4SLinus Torvalds          display brightness and output, switching the LCD backlight on and off,
179*1da177e4SLinus Torvalds          and most importantly, allows you to blink those fancy LEDs intended
180*1da177e4SLinus Torvalds          for reporting mail and wireless status.
181*1da177e4SLinus Torvalds
182*1da177e4SLinus Torvalds	  Note: display switching code is currently considered EXPERIMENTAL,
183*1da177e4SLinus Torvalds	  toying with these values may even lock your machine.
184*1da177e4SLinus Torvalds
185*1da177e4SLinus Torvalds          All settings are changed via /proc/acpi/asus directory entries. Owner
186*1da177e4SLinus Torvalds          and group for these entries can be set with asus_uid and asus_gid
187*1da177e4SLinus Torvalds          parameters.
188*1da177e4SLinus Torvalds
189*1da177e4SLinus Torvalds          More information and a userspace daemon for handling the extra buttons
190*1da177e4SLinus Torvalds          at <http://sourceforge.net/projects/acpi4asus/>.
191*1da177e4SLinus Torvalds
192*1da177e4SLinus Torvalds          If you have an ACPI-compatible ASUS laptop, say Y or M here. This
193*1da177e4SLinus Torvalds          driver is still under development, so if your laptop is unsupported or
194*1da177e4SLinus Torvalds          something works not quite as expected, please use the mailing list
195*1da177e4SLinus Torvalds          available on the above page (acpi4asus-user@lists.sourceforge.net)
196*1da177e4SLinus Torvalds
197*1da177e4SLinus Torvaldsconfig ACPI_IBM
198*1da177e4SLinus Torvalds	tristate "IBM ThinkPad Laptop Extras"
199*1da177e4SLinus Torvalds	depends on X86
200*1da177e4SLinus Torvalds	default m
201*1da177e4SLinus Torvalds	---help---
202*1da177e4SLinus Torvalds	  This is a Linux ACPI driver for the IBM ThinkPad laptops. It adds
203*1da177e4SLinus Torvalds	  support for Fn-Fx key combinations, Bluetooth control, video
204*1da177e4SLinus Torvalds	  output switching, ThinkLight control, UltraBay eject and more.
205*1da177e4SLinus Torvalds	  For more information about this driver see <file:Documentation/ibm-acpi.txt>
206*1da177e4SLinus Torvalds	  and <http://ibm-acpi.sf.net/> .
207*1da177e4SLinus Torvalds
208*1da177e4SLinus Torvalds	  If you have an IBM ThinkPad laptop, say Y or M here.
209*1da177e4SLinus Torvalds
210*1da177e4SLinus Torvaldsconfig ACPI_TOSHIBA
211*1da177e4SLinus Torvalds	tristate "Toshiba Laptop Extras"
212*1da177e4SLinus Torvalds	depends on X86
213*1da177e4SLinus Torvalds	default m
214*1da177e4SLinus Torvalds	---help---
215*1da177e4SLinus Torvalds	  This driver adds support for access to certain system settings
216*1da177e4SLinus Torvalds	  on "legacy free" Toshiba laptops.  These laptops can be recognized by
217*1da177e4SLinus Torvalds	  their lack of a BIOS setup menu and APM support.
218*1da177e4SLinus Torvalds
219*1da177e4SLinus Torvalds	  On these machines, all system configuration is handled through the
220*1da177e4SLinus Torvalds	  ACPI.  This driver is required for access to controls not covered
221*1da177e4SLinus Torvalds	  by the general ACPI drivers, such as LCD brightness, video output,
222*1da177e4SLinus Torvalds	  etc.
223*1da177e4SLinus Torvalds
224*1da177e4SLinus Torvalds	  This driver differs from the non-ACPI Toshiba laptop driver (located
225*1da177e4SLinus Torvalds	  under "Processor type and features") in several aspects.
226*1da177e4SLinus Torvalds	  Configuration is accessed by reading and writing text files in the
227*1da177e4SLinus Torvalds	  /proc tree instead of by program interface to /dev.  Furthermore, no
228*1da177e4SLinus Torvalds	  power management functions are exposed, as those are handled by the
229*1da177e4SLinus Torvalds	  general ACPI drivers.
230*1da177e4SLinus Torvalds
231*1da177e4SLinus Torvalds	  More information about this driver is available at
232*1da177e4SLinus Torvalds	  <http://memebeam.org/toys/ToshibaAcpiDriver>.
233*1da177e4SLinus Torvalds
234*1da177e4SLinus Torvalds	  If you have a legacy free Toshiba laptop (such as the Libretto L1
235*1da177e4SLinus Torvalds	  series), say Y.
236*1da177e4SLinus Torvalds
237*1da177e4SLinus Torvaldsconfig ACPI_CUSTOM_DSDT
238*1da177e4SLinus Torvalds	bool "Include Custom DSDT"
239*1da177e4SLinus Torvalds	depends on !STANDALONE
240*1da177e4SLinus Torvalds	default n
241*1da177e4SLinus Torvalds	help
242*1da177e4SLinus Torvalds	  Thist option is to load a custom ACPI DSDT
243*1da177e4SLinus Torvalds	  If you don't know what that is, say N.
244*1da177e4SLinus Torvalds
245*1da177e4SLinus Torvaldsconfig ACPI_CUSTOM_DSDT_FILE
246*1da177e4SLinus Torvalds	string "Custom DSDT Table file to include"
247*1da177e4SLinus Torvalds	depends on ACPI_CUSTOM_DSDT
248*1da177e4SLinus Torvalds	default ""
249*1da177e4SLinus Torvalds	help
250*1da177e4SLinus Torvalds	  Enter the full path name to the file wich includes the AmlCode declaration.
251*1da177e4SLinus Torvalds
252*1da177e4SLinus Torvaldsconfig ACPI_BLACKLIST_YEAR
253*1da177e4SLinus Torvalds	int "Disable ACPI for systems before Jan 1st this year"
254*1da177e4SLinus Torvalds	depends on ACPI_INTERPRETER
255*1da177e4SLinus Torvalds	default 0
256*1da177e4SLinus Torvalds	help
257*1da177e4SLinus Torvalds	  enter a 4-digit year, eg. 2001 to disable ACPI by default
258*1da177e4SLinus Torvalds	  on platforms with DMI BIOS date before January 1st that year.
259*1da177e4SLinus Torvalds	  "acpi=force" can be used to override this mechanism.
260*1da177e4SLinus Torvalds
261*1da177e4SLinus Torvalds	  Enter 0 to disable this mechanism and allow ACPI to
262*1da177e4SLinus Torvalds	  run by default no matter what the year.  (default)
263*1da177e4SLinus Torvalds
264*1da177e4SLinus Torvaldsconfig ACPI_DEBUG
265*1da177e4SLinus Torvalds	bool "Debug Statements"
266*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
267*1da177e4SLinus Torvalds	default n
268*1da177e4SLinus Torvalds	help
269*1da177e4SLinus Torvalds	  The ACPI driver can optionally report errors with a great deal
270*1da177e4SLinus Torvalds	  of verbosity. Saying Y enables these statements. This will increase
271*1da177e4SLinus Torvalds	  your kernel size by around 50K.
272*1da177e4SLinus Torvalds
273*1da177e4SLinus Torvaldsconfig ACPI_BUS
274*1da177e4SLinus Torvalds	bool
275*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
276*1da177e4SLinus Torvalds	default y
277*1da177e4SLinus Torvalds
278*1da177e4SLinus Torvaldsconfig ACPI_EC
279*1da177e4SLinus Torvalds	bool
280*1da177e4SLinus Torvalds	depends on X86
281*1da177e4SLinus Torvalds	default y
282*1da177e4SLinus Torvalds	help
283*1da177e4SLinus Torvalds	  This driver is required on some systems for the proper operation of
284*1da177e4SLinus Torvalds	  the battery and thermal drivers.  If you are compiling for a
285*1da177e4SLinus Torvalds	  mobile system, say Y.
286*1da177e4SLinus Torvalds
287*1da177e4SLinus Torvaldsconfig ACPI_POWER
288*1da177e4SLinus Torvalds	bool
289*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
290*1da177e4SLinus Torvalds	default y
291*1da177e4SLinus Torvalds
292*1da177e4SLinus Torvaldsconfig ACPI_PCI
293*1da177e4SLinus Torvalds	bool
294*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
295*1da177e4SLinus Torvalds	default PCI
296*1da177e4SLinus Torvalds
297*1da177e4SLinus Torvaldsconfig ACPI_SYSTEM
298*1da177e4SLinus Torvalds	bool
299*1da177e4SLinus Torvalds	depends on !IA64_SGI_SN
300*1da177e4SLinus Torvalds	default y
301*1da177e4SLinus Torvalds	help
302*1da177e4SLinus Torvalds	  This driver will enable your system to shut down using ACPI, and
303*1da177e4SLinus Torvalds	  dump your ACPI DSDT table using /proc/acpi/dsdt.
304*1da177e4SLinus Torvalds
305*1da177e4SLinus Torvaldsendif	# ACPI_INTERPRETER
306*1da177e4SLinus Torvalds
307*1da177e4SLinus Torvaldsconfig X86_PM_TIMER
308*1da177e4SLinus Torvalds	bool "Power Management Timer Support"
309*1da177e4SLinus Torvalds	depends on X86
310*1da177e4SLinus Torvalds	depends on ACPI_BOOT && EXPERIMENTAL
311*1da177e4SLinus Torvalds	depends on !X86_64
312*1da177e4SLinus Torvalds	default n
313*1da177e4SLinus Torvalds	help
314*1da177e4SLinus Torvalds	  The Power Management Timer is available on all ACPI-capable,
315*1da177e4SLinus Torvalds	  in most cases even if ACPI is unusable or blacklisted.
316*1da177e4SLinus Torvalds
317*1da177e4SLinus Torvalds	  This timing source is not affected by powermanagement features
318*1da177e4SLinus Torvalds	  like aggressive processor idling, throttling, frequency and/or
319*1da177e4SLinus Torvalds	  voltage scaling, unlike the commonly used Time Stamp Counter
320*1da177e4SLinus Torvalds	  (TSC) timing source.
321*1da177e4SLinus Torvalds
322*1da177e4SLinus Torvalds	  So, if you see messages like 'Losing too many ticks!' in the
323*1da177e4SLinus Torvalds	  kernel logs, and/or you are using this on a notebook which
324*1da177e4SLinus Torvalds	  does not yet have an HPET, you should say "Y" here.
325*1da177e4SLinus Torvalds
326*1da177e4SLinus Torvaldsconfig ACPI_CONTAINER
327*1da177e4SLinus Torvalds	tristate "ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)"
328*1da177e4SLinus Torvalds	depends on EXPERIMENTAL
329*1da177e4SLinus Torvalds	default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO)
330*1da177e4SLinus Torvalds	 ---help---
331*1da177e4SLinus Torvalds	 	This is the ACPI generic container driver which supports
332*1da177e4SLinus Torvalds		ACPI0004, PNP0A05 and PNP0A06 devices
333*1da177e4SLinus Torvalds
334*1da177e4SLinus Torvaldsconfig ACPI_HOTPLUG_MEMORY
335*1da177e4SLinus Torvalds	tristate "Memory Hotplug"
336*1da177e4SLinus Torvalds	depends on ACPI
337*1da177e4SLinus Torvalds	depends on MEMORY_HOTPLUG
338*1da177e4SLinus Torvalds	default n
339*1da177e4SLinus Torvalds	help
340*1da177e4SLinus Torvalds	  This driver adds supports for ACPI Memory Hotplug.  This driver
341*1da177e4SLinus Torvalds	  provides support for fielding notifications on ACPI memory
342*1da177e4SLinus Torvalds	  devices (PNP0C80) which represent memory ranges that may be
343*1da177e4SLinus Torvalds	  onlined or offlined during runtime.
344*1da177e4SLinus Torvalds
345*1da177e4SLinus Torvalds	  Enabling this driver assumes that your platform hardware
346*1da177e4SLinus Torvalds	  and firmware have support for hot-plugging physical memory. If
347*1da177e4SLinus Torvalds	  your system does not support physically adding or ripping out
348*1da177e4SLinus Torvalds	  memory DIMMs at some platfrom defined granularity (individually
349*1da177e4SLinus Torvalds	  or as a bank) at runtime, then you need not enable this driver.
350*1da177e4SLinus Torvalds
351*1da177e4SLinus Torvalds	  If one selects "m," this driver can be loaded using the following
352*1da177e4SLinus Torvalds	  command:
353*1da177e4SLinus Torvalds		$>modprobe acpi_memhotplug
354*1da177e4SLinus Torvaldsendif	# ACPI
355*1da177e4SLinus Torvalds
356*1da177e4SLinus Torvaldsendmenu
357