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Linus Torvalds1da177e2005-04-16 15:20:36 -07001February 2003 Kernel Parameters v2.5.59
2 ~~~~~~~~~~~~~~~~~
3
4The following is a consolidated list of the kernel parameters as implemented
5(mostly) by the __setup() macro and sorted into English Dictionary order
6(defined as ignoring all punctuation and sorting digits before letters in a
7case insensitive manner), and with descriptions where known.
8
9Module parameters for loadable modules are specified only as the
10parameter name with optional '=' and value as appropriate, such as:
11
12 modprobe usbcore blinkenlights=1
13
14Module parameters for modules that are built into the kernel image
15are specified on the kernel command line with the module name plus
16'.' plus parameter name, with '=' and value if appropriate, such as:
17
18 usbcore.blinkenlights=1
19
Randy Dunlapa9913042005-10-23 12:57:11 -070020The text in square brackets at the beginning of the description states the
Linus Torvalds1da177e2005-04-16 15:20:36 -070021restrictions on the kernel for the said kernel parameter to be valid. The
22restrictions referred to are that the relevant option is valid if:
23
24 ACPI ACPI support is enabled.
25 ALSA ALSA sound support is enabled.
26 APIC APIC support is enabled.
27 APM Advanced Power Management support is enabled.
28 AX25 Appropriate AX.25 support is enabled.
29 CD Appropriate CD support is enabled.
Randy Dunlapa9913042005-10-23 12:57:11 -070030 DEVFS devfs support is enabled.
31 DRM Direct Rendering Management support is enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
33 EFI EFI Partitioning (GPT) is enabled
34 EIDE EIDE/ATAPI support is enabled.
35 FB The frame buffer device is enabled.
36 HW Appropriate hardware is enabled.
37 IA-32 IA-32 aka i386 architecture is enabled.
38 IA-64 IA-64 architecture is enabled.
39 IOSCHED More than one I/O scheduler is enabled.
Adrian Bunk41e2e8b2005-07-12 13:58:33 -070040 IP_PNP IP DHCP, BOOTP, or RARP is enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 ISAPNP ISA PnP code is enabled.
42 ISDN Appropriate ISDN support is enabled.
43 JOY Appropriate joystick support is enabled.
44 LP Printer support is enabled.
45 LOOP Loopback device support is enabled.
46 M68k M68k architecture is enabled.
47 These options have more detailed description inside of
48 Documentation/m68k/kernel-options.txt.
49 MCA MCA bus support is enabled.
50 MDA MDA console support is enabled.
51 MOUSE Appropriate mouse support is enabled.
52 MTD MTD support is enabled.
53 NET Appropriate network support is enabled.
54 NUMA NUMA support is enabled.
55 NFS Appropriate NFS support is enabled.
56 OSS OSS sound support is enabled.
57 PARIDE The ParIDE subsystem is enabled.
58 PARISC The PA-RISC architecture is enabled.
59 PCI PCI bus support is enabled.
60 PCMCIA The PCMCIA subsystem is enabled.
61 PNP Plug & Play support is enabled.
62 PPC PowerPC architecture is enabled.
63 PPT Parallel port support is enabled.
64 PS2 Appropriate PS/2 support is enabled.
65 RAM RAM disk support is enabled.
66 S390 S390 architecture is enabled.
67 SCSI Appropriate SCSI support is enabled.
68 A lot of drivers has their options described inside of
69 Documentation/scsi/.
70 SELINUX SELinux support is enabled.
71 SERIAL Serial support is enabled.
72 SMP The kernel is an SMP kernel.
73 SPARC Sparc architecture is enabled.
Randy Dunlapa9913042005-10-23 12:57:11 -070074 SWSUSP Software suspend is enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 TS Appropriate touchscreen support is enabled.
76 USB USB support is enabled.
77 USBHID USB Human Interface Device support is enabled.
78 V4L Video For Linux support is enabled.
79 VGA The VGA console has been enabled.
80 VT Virtual terminal support is enabled.
81 WDT Watchdog support is enabled.
82 XT IBM PC/XT MFM hard disk support is enabled.
83 X86-64 X86-64 architecture is enabled.
84 More X86-64 boot options can be found in
85 Documentation/x86_64/boot-options.txt .
86
87In addition, the following text indicates that the option:
88
89 BUGS= Relates to possible processor bugs on the said processor.
90 KNL Is a kernel start-up parameter.
91 BOOT Is a boot loader parameter.
92
93Parameters denoted with BOOT are actually interpreted by the boot
94loader, and have no meaning to the kernel directly.
95Do not modify the syntax of boot loader parameters without extreme
96need or coordination with <Documentation/i386/boot.txt>.
97
98Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
99a trailing = on the name of any parameter states that that parameter will
100be entered as an environment variable, whereas its absence indicates that
101it will appear as a kernel argument readable via /proc/cmdline by programs
102running once the system is up.
103
104 53c7xx= [HW,SCSI] Amiga SCSI controllers
105 See header of drivers/scsi/53c7xx.c.
106 See also Documentation/scsi/ncr53c7xx.txt.
107
Randy Dunlapa9913042005-10-23 12:57:11 -0700108 acpi= [HW,ACPI] Advanced Configuration and Power Interface
109 Format: { force | off | ht | strict | noirq }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 force -- enable ACPI if default was off
111 off -- disable ACPI if default was on
112 noirq -- do not use ACPI for IRQ routing
113 ht -- run only enough ACPI to enable Hyper Threading
Randy Dunlapa9913042005-10-23 12:57:11 -0700114 strict -- Be less tolerant of platforms that are not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 strictly ACPI specification compliant.
116
117 See also Documentation/pm.txt, pci=noacpi
118
119 acpi_sleep= [HW,ACPI] Sleep options
120 Format: { s3_bios, s3_mode }
121 See Documentation/power/video.txt
Randy Dunlapa9913042005-10-23 12:57:11 -0700122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode
Randy Dunlapa9913042005-10-23 12:57:11 -0700124 Format: { level | edge | high | low }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Randy Dunlapa9913042005-10-23 12:57:11 -0700126 acpi_irq_balance [HW,ACPI]
127 ACPI will balance active IRQs
128 default in APIC mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Randy Dunlapa9913042005-10-23 12:57:11 -0700130 acpi_irq_nobalance [HW,ACPI]
131 ACPI will not move active IRQs (default)
132 default in PIC mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Randy Dunlapa9913042005-10-23 12:57:11 -0700134 acpi_irq_pci= [HW,ACPI] If irq_balance, clear listed IRQs for
135 use by PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 Format: <irq>,<irq>...
137
Randy Dunlapa9913042005-10-23 12:57:11 -0700138 acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 Format: <irq>,<irq>...
140
141 acpi_osi= [HW,ACPI] empty param disables _OSI
142
143 acpi_serialize [HW,ACPI] force serialization of AML methods
144
145 acpi_skip_timer_override [HW,ACPI]
146 Recognize and ignore IRQ0/pin2 Interrupt Override.
147 For broken nForce2 BIOS resulting in XT-PIC timer.
148
149 acpi_dbg_layer= [HW,ACPI]
150 Format: <int>
Randy Dunlapa9913042005-10-23 12:57:11 -0700151 Each bit of the <int> indicates an ACPI debug layer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 1: enable, 0: disable. It is useful for boot time
153 debugging. After system has booted up, it can be set
154 via /proc/acpi/debug_layer.
155
156 acpi_dbg_level= [HW,ACPI]
157 Format: <int>
Randy Dunlapa9913042005-10-23 12:57:11 -0700158 Each bit of the <int> indicates an ACPI debug level,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 1: enable, 0: disable. It is useful for boot time
160 debugging. After system has booted up, it can be set
161 via /proc/acpi/debug_level.
162
163 acpi_fake_ecdt [HW,ACPI] Workaround failure due to BIOS lacking ECDT
164
Luming Yu30e332f2005-08-12 00:31:00 -0400165 acpi_generic_hotkey [HW,ACPI]
166 Allow consolidated generic hotkey driver to
Randy Dunlapa9913042005-10-23 12:57:11 -0700167 override platform specific driver.
Luming Yu30e332f2005-08-12 00:31:00 -0400168 See also Documentation/acpi-hotkey.txt.
169
Chuck Ebbert66759a02005-09-12 18:49:25 +0200170 enable_timer_pin_1 [i386,x86-64]
171 Enable PIN 1 of APIC timer
Randy Dunlapa9913042005-10-23 12:57:11 -0700172 Can be useful to work around chipset bugs
173 (in particular on some ATI chipsets).
Chuck Ebbert66759a02005-09-12 18:49:25 +0200174 The kernel tries to set a reasonable default.
175
176 disable_timer_pin_1 [i386,x86-64]
177 Disable PIN 1 of APIC timer
178 Can be useful to work around chipset bugs.
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 ad1816= [HW,OSS]
181 Format: <io>,<irq>,<dma>,<dma2>
182 See also Documentation/sound/oss/AD1816.
183
184 ad1848= [HW,OSS]
185 Format: <io>,<irq>,<dma>,<dma2>,<type>
186
187 adlib= [HW,OSS]
188 Format: <io>
Randy Dunlapa9913042005-10-23 12:57:11 -0700189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 advansys= [HW,SCSI]
191 See header of drivers/scsi/advansys.c.
192
193 advwdt= [HW,WDT] Advantech WDT
194 Format: <iostart>,<iostop>
195
196 aedsp16= [HW,OSS] Audio Excel DSP 16
197 Format: <io>,<irq>,<dma>,<mss_io>,<mpu_io>,<mpu_irq>
198 See also header of sound/oss/aedsp16.c.
Randy Dunlapa9913042005-10-23 12:57:11 -0700199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 aha152x= [HW,SCSI]
201 See Documentation/scsi/aha152x.txt.
202
203 aha1542= [HW,SCSI]
204 Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
205
206 aic7xxx= [HW,SCSI]
207 See Documentation/scsi/aic7xxx.txt.
208
209 aic79xx= [HW,SCSI]
210 See Documentation/scsi/aic79xx.txt.
211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 amijoy.map= [HW,JOY] Amiga joystick support
213 Map of devices attached to JOY0DAT and JOY1DAT
214 Format: <a>,<b>
215 See also Documentation/kernel/input/joystick.txt
216
217 analog.map= [HW,JOY] Analog joystick and gamepad support
218 Specifies type or capabilities of an analog joystick
219 connected to one of 16 gameports
220 Format: <type1>,<type2>,..<type16>
221
Randy Dunlapa9913042005-10-23 12:57:11 -0700222 apc= [HW,SPARC]
223 Power management functions (SPARCstation-4/5 + deriv.)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 Format: noidle
225 Disable APC CPU standby support. SPARCstation-Fox does
226 not play well with APC CPU idle - disable it if you have
227 APC and your system crashes randomly.
228
Randy Dunlapa9913042005-10-23 12:57:11 -0700229 apic= [APIC,i386] Change the output verbosity whilst booting
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 Format: { quiet (default) | verbose | debug }
231 Change the amount of debugging information output
232 when initialising the APIC and IO-APIC components.
Randy Dunlapa9913042005-10-23 12:57:11 -0700233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 apm= [APM] Advanced Power Management
235 See header of arch/i386/kernel/apm.c.
236
237 applicom= [HW]
238 Format: <mem>,<irq>
Randy Dunlapa9913042005-10-23 12:57:11 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
241 Format: <io>,<irq>,<nodeID>
242
243 ataflop= [HW,M68k]
244
245 atarimouse= [HW,MOUSE] Atari Mouse
246
247 atascsi= [HW,SCSI] Atari SCSI
248
249 atkbd.extra= [HW] Enable extra LEDs and keys on IBM RapidAccess,
250 EzKey and similar keyboards
251
252 atkbd.reset= [HW] Reset keyboard during initialization
253
Randy Dunlapa9913042005-10-23 12:57:11 -0700254 atkbd.set= [HW] Select keyboard code set
255 Format: <int> (2 = AT (default), 3 = PS/2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257 atkbd.scroll= [HW] Enable scroll wheel on MS Office and similar
258 keyboards
259
260 atkbd.softraw= [HW] Choose between synthetic and real raw mode
261 Format: <bool> (0 = real, 1 = synthetic (default))
Randy Dunlapa9913042005-10-23 12:57:11 -0700262
263 atkbd.softrepeat= [HW]
264 Use software keyboard repeat
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 autotest [IA64]
267
268 awe= [HW,OSS] AWE32/SB32/AWE64 wave table synth
269 Format: <io>,<memsize>,<isapnp>
Randy Dunlapa9913042005-10-23 12:57:11 -0700270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 aztcd= [HW,CD] Aztech CD268 CDROM driver
272 Format: <io>,0x79 (?)
273
274 baycom_epp= [HW,AX25]
275 Format: <io>,<mode>
Randy Dunlapa9913042005-10-23 12:57:11 -0700276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
278 Format: <io>,<mode>
279 See header of drivers/net/hamradio/baycom_par.c.
280
Randy Dunlapa9913042005-10-23 12:57:11 -0700281 baycom_ser_fdx= [HW,AX25]
282 BayCom Serial Port AX.25 Modem (Full Duplex Mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 Format: <io>,<irq>,<mode>[,<baud>]
284 See header of drivers/net/hamradio/baycom_ser_fdx.c.
285
Randy Dunlapa9913042005-10-23 12:57:11 -0700286 baycom_ser_hdx= [HW,AX25]
287 BayCom Serial Port AX.25 Modem (Half Duplex Mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 Format: <io>,<irq>,<mode>
289 See header of drivers/net/hamradio/baycom_ser_hdx.c.
290
291 blkmtd_device= [HW,MTD]
292 blkmtd_erasesz=
293 blkmtd_ro=
294 blkmtd_bs=
295 blkmtd_count=
296
297 bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
Randy Dunlapa9913042005-10-23 12:57:11 -0700298 bttv.radio= Most important insmod options are available as
299 kernel args too.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 bttv.pll= See Documentation/video4linux/bttv/Insmod-options
301 bttv.tuner= and Documentation/video4linux/bttv/CARDLIST
302
303 BusLogic= [HW,SCSI]
304 See drivers/scsi/BusLogic.c, comment before function
305 BusLogic_ParseDriverOptions().
306
307 c101= [NET] Moxa C101 synchronous serial card
308
309 cachesize= [BUGS=IA-32] Override level 2 CPU cache size detection.
310 Sometimes CPU hardware bugs make them report the cache
311 size incorrectly. The kernel will attempt work arounds
312 to fix known problems, but for some CPUs it is not
313 possible to determine what the correct size should be.
314 This option provides an override for these situations.
315
316 cdu31a= [HW,CD]
317 Format: <io>,<irq>[,PAS]
318 See header of drivers/cdrom/cdu31a.c.
319
320 chandev= [HW,NET] Generic channel device initialisation
321
322 checkreqprot [SELINUX] Set initial checkreqprot flag value.
323 Format: { "0" | "1" }
324 See security/selinux/Kconfig help text.
Randy Dunlapa9913042005-10-23 12:57:11 -0700325 0 -- check protection applied by kernel (includes
326 any implied execute protection).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 1 -- check protection requested by application.
328 Default value is set via a kernel config option.
Randy Dunlapa9913042005-10-23 12:57:11 -0700329 Value can be changed at runtime via
330 /selinux/checkreqprot.
331
332 clock= [BUGS=IA-32,HW] gettimeofday timesource override.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 Forces specified timesource (if avaliable) to be used
Randy Dunlapa9913042005-10-23 12:57:11 -0700334 when calculating gettimeofday(). If specicified
335 timesource is not avalible, it defaults to PIT.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 Format: { pit | tsc | cyclone | pmtmr }
337
338 hpet= [IA-32,HPET] option to disable HPET and use PIT.
339 Format: disable
340
341 cm206= [HW,CD]
342 Format: { auto | [<io>,][<irq>] }
343
344 com20020= [HW,NET] ARCnet - COM20020 chipset
Randy Dunlapa9913042005-10-23 12:57:11 -0700345 Format:
346 <io>[,<irq>[,<nodeID>[,<backplane>[,<ckp>[,<timeout>]]]]]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
349 Format: <io>[,<irq>]
350
Randy Dunlapa9913042005-10-23 12:57:11 -0700351 com90xx= [HW,NET]
352 ARCnet - COM90xx chipset (memory-mapped buffers)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 Format: <io>[,<irq>[,<memstart>]]
354
355 condev= [HW,S390] console device
356 conmode=
Randy Dunlapa9913042005-10-23 12:57:11 -0700357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 console= [KNL] Output console device and options.
359
360 tty<n> Use the virtual console device <n>.
361
362 ttyS<n>[,options]
363 Use the specified serial port. The options are of
364 the form "bbbbpn", where "bbbb" is the baud rate,
365 "p" is parity ("n", "o", or "e"), and "n" is bits.
366 Default is "9600n8".
367
368 See also Documentation/serial-console.txt.
369
370 uart,io,<addr>[,options]
371 uart,mmio,<addr>[,options]
372 Start an early, polled-mode console on the 8250/16550
373 UART at the specified I/O port or MMIO address,
374 switching to the matching ttyS device later. The
375 options are the same as for ttyS, above.
376
377 cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver
Randy Dunlapa9913042005-10-23 12:57:11 -0700378 Format:
379 <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 cpia_pp= [HW,PPT]
382 Format: { parport<nr> | auto | none }
383
Eric W. Biedermandc009d92005-06-25 14:57:52 -0700384 crashkernel=nn[KMG]@ss[KMG]
385 [KNL] Reserve a chunk of physical memory to
386 hold a kernel to switch to with kexec on panic.
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 cs4232= [HW,OSS]
389 Format: <io>,<irq>,<dma>,<dma2>,<mpuio>,<mpuirq>
390
391 cs89x0_dma= [HW,NET]
392 Format: <dma>
393
394 cs89x0_media= [HW,NET]
395 Format: { rj45 | aui | bnc }
Randy Dunlapa9913042005-10-23 12:57:11 -0700396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 cyclades= [HW,SERIAL] Cyclades multi-serial port adapter.
Randy Dunlapa9913042005-10-23 12:57:11 -0700398
399 dasd= [HW,NET]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 See header of drivers/s390/block/dasd_devmap.c.
401
402 db9.dev[2|3]= [HW,JOY] Multisystem joystick support via parallel port
403 (one device per port)
404 Format: <port#>,<type>
405 See also Documentation/input/joystick-parport.txt
406
407 debug [KNL] Enable kernel debugging (events log level).
408
409 decnet= [HW,NET]
410 Format: <area>[,<node>]
411 See also Documentation/networking/decnet.txt.
412
413 devfs= [DEVFS]
414 See Documentation/filesystems/devfs/boot-options.
415
416 dhash_entries= [KNL]
417 Set number of hash buckets for dentry cache.
Randy Dunlapa9913042005-10-23 12:57:11 -0700418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 digi= [HW,SERIAL]
420 IO parameters + enable/disable command.
421
422 digiepca= [HW,SERIAL]
423 See drivers/char/README.epca and
424 Documentation/digiepca.txt.
425
426 dmascc= [HW,AX25,SERIAL] AX.25 Z80SCC driver with DMA
427 support available.
428 Format: <io_dev0>[,<io_dev1>[,..<io_dev32>]]
429
430 dmasound= [HW,OSS] Sound subsystem buffers
431
432 dscc4.setup= [NET]
433
434 dtc3181e= [HW,SCSI]
435
Randy Dunlapa9913042005-10-23 12:57:11 -0700436 earlyprintk= [IA-32,X86-64]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 earlyprintk=vga
438 earlyprintk=serial[,ttySn[,baudrate]]
439
Randy Dunlapa9913042005-10-23 12:57:11 -0700440 Append ",keep" to not disable it when the real console
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 takes over.
442
443 Only vga or serial at a time, not both.
444
445 Currently only ttyS0 and ttyS1 are supported.
446
447 Interaction with the standard serial driver is not
448 very good.
449
450 The VGA output is eventually overwritten by the real
451 console.
452
453 eata= [HW,SCSI]
454
455 eda= [HW,PS2]
456
457 edb= [HW,PS2]
458
459 edd= [EDD]
460 Format: {"of[f]" | "sk[ipmbr]"}
461 See comment in arch/i386/boot/edd.S
462
Randy Dunlapa9913042005-10-23 12:57:11 -0700463 eicon= [HW,ISDN]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 Format: <id>,<membase>,<irq>
465
466 eisa_irq_edge= [PARISC,HW]
467 See header of drivers/parisc/eisa.c.
468
469 elanfreq= [IA-32]
470 See comment before function elanfreq_setup() in
471 arch/i386/kernel/cpu/cpufreq/elanfreq.c.
472
473 elevator= [IOSCHED]
Randy Dunlapa9913042005-10-23 12:57:11 -0700474 Format: {"as" | "cfq" | "deadline" | "noop"}
475 See Documentation/block/as-iosched.txt and
476 Documentation/block/deadline-iosched.txt for details.
477
Vivek Goyal2030eae2005-06-25 14:58:20 -0700478 elfcorehdr= [IA-32]
Randy Dunlapa9913042005-10-23 12:57:11 -0700479 Specifies physical address of start of kernel core
480 image elf header.
Vivek Goyal2030eae2005-06-25 14:58:20 -0700481 See Documentation/kdump.txt for details.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 enforcing [SELINUX] Set initial enforcing status.
484 Format: {"0" | "1"}
485 See security/selinux/Kconfig help text.
486 0 -- permissive (log only, no denials).
487 1 -- enforcing (deny and log).
488 Default value is 0.
489 Value can be changed at runtime via /selinux/enforce.
490
491 es1370= [HW,OSS]
492 Format: <lineout>[,<micbias>]
493 See also header of sound/oss/es1370.c.
494
495 es1371= [HW,OSS]
496 Format: <spdif>,[<nomix>,[<amplifier>]]
497 See also header of sound/oss/es1371.c.
Randy Dunlapa9913042005-10-23 12:57:11 -0700498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 ether= [HW,NET] Ethernet cards parameters
500 This option is obsoleted by the "netdev=" option, which
501 has equivalent usage. See its documentation for details.
502
503 eurwdt= [HW,WDT] Eurotech CPU-1220/1410 onboard watchdog.
504 Format: <io>[,<irq>]
505
506 fd_mcs= [HW,SCSI]
507 See header of drivers/scsi/fd_mcs.c.
508
509 fdomain= [HW,SCSI]
510 See header of drivers/scsi/fdomain.c.
511
512 floppy= [HW]
513 See Documentation/floppy.txt.
514
515 ftape= [HW] Floppy Tape subsystem debugging options.
516 See Documentation/ftape.txt.
517
518 gamecon.map[2|3]=
519 [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
520 support via parallel port (up to 5 devices per port)
521 Format: <port#>,<pad1>,<pad2>,<pad3>,<pad4>,<pad5>
522 See also Documentation/input/joystick-parport.txt
523
524 gamma= [HW,DRM]
525
526 gdth= [HW,SCSI]
527 See header of drivers/scsi/gdth.c.
528
529 gpt [EFI] Forces disk with valid GPT signature but
530 invalid Protective MBR to be treated as GPT.
531
532 gscd= [HW,CD]
533 Format: <io>
534
535 gt96100eth= [NET] MIPS GT96100 Advanced Communication Controller
536
537 gus= [HW,OSS]
538 Format: <io>,<irq>,<dma>,<dma16>
Randy Dunlapa9913042005-10-23 12:57:11 -0700539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 gvp11= [HW,SCSI]
541
542 hashdist= [KNL,NUMA] Large hashes allocated during boot
543 are distributed across NUMA nodes. Defaults on
544 for IA-64, off otherwise.
Randy Dunlapa9913042005-10-23 12:57:11 -0700545 Format: 0 | 1 (for off | on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 hcl= [IA-64] SGI's Hardware Graph compatibility layer
548
549 hd= [EIDE] (E)IDE hard drive subsystem geometry
550 Format: <cyl>,<head>,<sect>
551
552 hd?= [HW] (E)IDE subsystem
553 hd?lun= See Documentation/ide.txt.
554
555 highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
556 size of <nn>. This works even on boxes that have no
557 highmem otherwise. This also works to reduce highmem
558 size on bigger boxes.
559
560 hisax= [HW,ISDN]
561 See Documentation/isdn/README.HiSax.
562
563 hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages.
564
565 noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
566
567 i8042.direct [HW] Put keyboard port into non-translated mode
568 i8042.dumbkbd [HW] Pretend that controlled can only read data from
569 keyboard and can not control its state
570 (Don't attempt to blink the leds)
571 i8042.noaux [HW] Don't check for auxiliary (== mouse) port
Dmitry Torokhov945ef0d2005-09-04 01:42:00 -0500572 i8042.nokbd [HW] Don't check/create keyboard port
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 i8042.nomux [HW] Don't check presence of an active multiplexing
574 controller
575 i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
576 controllers
577 i8042.panicblink=
578 [HW] Frequency with which keyboard LEDs should blink
579 when kernel panics (default is 0.5 sec)
580 i8042.reset [HW] Reset the controller during init and cleanup
581 i8042.unlock [HW] Unlock (ignore) the keylock
582
583 i810= [HW,DRM]
584
Dmitry Torokhove70c9d52005-06-25 14:54:25 -0700585 i8k.ignore_dmi [HW] Continue probing hardware even if DMI data
586 indicates that the driver is running on unsupported
587 hardware.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 i8k.force [HW] Activate i8k driver even if SMM BIOS signature
589 does not match list of supported models.
590 i8k.power_status
591 [HW] Report power status in /proc/i8k
592 (disabled by default)
593 i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN
594 capability is set.
595
596 ibmmcascsi= [HW,MCA,SCSI] IBM MicroChannel SCSI adapter
597 See Documentation/mca.txt.
598
599 icn= [HW,ISDN]
600 Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
601
602 ide= [HW] (E)IDE subsystem
603 Format: ide=nodma or ide=doubler or ide=reverse
604 See Documentation/ide.txt.
605
606 ide?= [HW] (E)IDE subsystem
607 Format: ide?=noprobe or chipset specific parameters.
608 See Documentation/ide.txt.
Randy Dunlapa9913042005-10-23 12:57:11 -0700609
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
611 See Documentation/ide.txt.
612
613 idle= [HW]
614 Format: idle=poll or idle=halt
Randy Dunlapa9913042005-10-23 12:57:11 -0700615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 ihash_entries= [KNL]
617 Set number of hash buckets for inode cache.
618
619 in2000= [HW,SCSI]
620 See header of drivers/scsi/in2000.c.
621
622 init= [KNL]
623 Format: <full_path>
624 Run specified binary instead of /sbin/init as init
625 process.
626
627 initcall_debug [KNL] Trace initcalls as they are executed. Useful
628 for working out where the kernel is dying during
629 startup.
630
631 initrd= [BOOT] Specify the location of the initial ramdisk
632
633 inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver
634 Format: <irq>
635
Jesse Barnes2bd0fa32005-12-13 03:05:03 -0500636 combined_mode= [HW] control which driver uses IDE ports in combined
637 mode: legacy IDE driver, libata, or both
638 (in the libata case, libata.atapi_enabled=1 may be
639 useful as well). Note that using the ide or libata
640 options may affect your device naming (e.g. by
641 changing hdc to sdb).
642 Format: combined (default), ide, or libata
643
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 inttest= [IA64]
645
646 io7= [HW] IO7 for Marvel based alpha systems
647 See comment before marvel_specify_io7 in
648 arch/alpha/kernel/core_marvel.c.
649
650 ip= [IP_PNP]
651 See Documentation/nfsroot.txt.
652
653 ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
654 See comment before ip2_setup() in drivers/char/ip2.c.
655
656 ips= [HW,SCSI] Adaptec / IBM ServeRAID controller
657 See header of drivers/scsi/ips.c.
658
Alan Cox200803d2005-06-28 20:45:18 -0700659 irqfixup [HW]
660 When an interrupt is not handled search all handlers
661 for it. Intended to get systems with badly broken
662 firmware running.
663
664 irqpoll [HW]
665 When an interrupt is not handled search all handlers
666 for it. Also check all handlers each timer
667 interrupt. Intended to get systems with badly broken
668 firmware running.
669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 isapnp= [ISAPNP]
Randy Dunlapa9913042005-10-23 12:57:11 -0700671 Format: <RDP>,<reset>,<pci_scan>,<verbosity>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
673 isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
674 Format: <cpu number>,...,<cpu number>
675 This option can be used to specify one or more CPUs
676 to isolate from the general SMP balancing and scheduling
677 algorithms. The only way to move a process onto or off
678 an "isolated" CPU is via the CPU affinity syscalls.
679 <cpu number> begins at 0 and the maximum value is
680 "number of CPUs in system - 1".
681
682 This option is the preferred way to isolate CPUs. The
Randy Dunlapa9913042005-10-23 12:57:11 -0700683 alternative -- manually setting the CPU mask of all
684 tasks in the system -- can cause problems and
685 suboptimal load balancer performance.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687 isp16= [HW,CD]
688 Format: <io>,<irq>,<dma>,<setup>
689
Randy Dunlapa9913042005-10-23 12:57:11 -0700690 iucv= [HW,NET]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
692 js= [HW,JOY] Analog joystick
693 See Documentation/input/joystick.txt.
694
695 keepinitrd [HW,ARM]
696
Randy Dunlapa9913042005-10-23 12:57:11 -0700697 kstack=N [IA-32,X86-64] Print N words from the kernel stack
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 in oops dumps.
699
700 l2cr= [PPC]
701
Randy Dunlapa9913042005-10-23 12:57:11 -0700702 lapic [IA-32,APIC] Enable the local APIC even if BIOS
703 disabled it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
705 lasi= [HW,SCSI] PARISC LASI driver for the 53c700 chip
706 Format: addr:<io>,irq:<irq>
707
Randy Dunlapa9913042005-10-23 12:57:11 -0700708 llsc*= [IA64] See function print_params() in
709 arch/ia64/sn/kernel/llsc4.c.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
711 load_ramdisk= [RAM] List of ramdisks to load from floppy
712 See Documentation/ramdisk.txt.
713
714 lockd.udpport= [NFS]
715
716 lockd.tcpport= [NFS]
717
718 logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver
719 Format: <irq>
720
721 loglevel= All Kernel Messages with a loglevel smaller than the
722 console loglevel will be printed to the console. It can
723 also be changed with klogd or other programs. The
724 loglevels are defined as follows:
725
726 0 (KERN_EMERG) system is unusable
727 1 (KERN_ALERT) action must be taken immediately
728 2 (KERN_CRIT) critical conditions
729 3 (KERN_ERR) error conditions
730 4 (KERN_WARNING) warning conditions
731 5 (KERN_NOTICE) normal but significant condition
732 6 (KERN_INFO) informational
733 7 (KERN_DEBUG) debug-level messages
734
735 log_buf_len=n Sets the size of the printk ring buffer, in bytes.
Randy Dunlapa9913042005-10-23 12:57:11 -0700736 Format: { n | nk | nM }
737 n must be a power of two. The default size
738 is set in the kernel config file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740 lp=0 [LP] Specify parallel ports to use, e.g,
741 lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses
742 lp=reset first parallel port). 'lp=0' disables the
743 lp=auto printer driver. 'lp=reset' (which can be
744 specified in addition to the ports) causes
745 attached printers to be reset. Using
746 lp=port1,port2,... specifies the parallel ports
747 to associate lp devices with, starting with
748 lp0. A port specification may be 'none' to skip
749 that lp device, or a parport name such as
750 'parport0'. Specifying 'lp=auto' instead of a
751 port specification list means that device IDs
752 from each port should be examined, to see if
753 an IEEE 1284-compliant printer is attached; if
754 so, the driver will manage that printer.
755 See also header of drivers/char/lp.c.
756
757 lpj=n [KNL]
758 Sets loops_per_jiffy to given constant, thus avoiding
759 time-consuming boot-time autodetection (up to 250 ms per
760 CPU). 0 enables autodetection (default). To determine
761 the correct value for your kernel, boot with normal
762 autodetection and see what value is printed. Note that
763 on SMP systems the preset will be applied to all CPUs,
764 which is likely to cause problems if your CPUs need
765 significantly divergent settings. An incorrect value
766 will cause delays in the kernel to be wrong, leading to
767 unpredictable I/O errors and other breakage. Although
768 unlikely, in the extreme case this might damage your
769 hardware.
770
771 ltpc= [NET]
772 Format: <io>,<irq>,<dma>
773
Randy Dunlapa9913042005-10-23 12:57:11 -0700774 mac5380= [HW,SCSI] Format:
775 <can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
Randy Dunlapa9913042005-10-23 12:57:11 -0700777 mac53c9x= [HW,SCSI] Format:
778 <num_esps>,<disconnect>,<nosync>,<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
Randy Dunlapa9913042005-10-23 12:57:11 -0700780 machvec= [IA64] Force the use of a particular machine-vector
781 (machvec) in a generic kernel.
782 Example: machvec=hpzx1_swiotlb
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Randy Dunlapa9913042005-10-23 12:57:11 -0700784 mad16= [HW,OSS] Format:
785 <io>,<irq>,<dma>,<dma16>,<mpu_io>,<mpu_irq>,<joystick>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
787 maui= [HW,OSS]
788 Format: <io>,<irq>
Randy Dunlapa9913042005-10-23 12:57:11 -0700789
790 max_loop= [LOOP] Maximum number of loopback devices that can
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 be mounted
792 Format: <1-256>
793
794 maxcpus= [SMP] Maximum number of processors that an SMP kernel
795 should make use of
796
Bob Picco2b2c3752005-06-29 18:00:00 -0700797 max_addr=[KMG] [KNL,BOOT,ia64] All physical memory greater than or
798 equal to this physical address is ignored.
799
Randy Dunlapa9913042005-10-23 12:57:11 -0700800 max_luns= [SCSI] Maximum number of LUNs to probe.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 Should be between 1 and 2^32-1.
802
803 max_report_luns=
Randy Dunlapa9913042005-10-23 12:57:11 -0700804 [SCSI] Maximum number of LUNs received.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 Should be between 1 and 16384.
806
807 mca-pentium [BUGS=IA-32]
808
809 mcatest= [IA-64]
810
811 mcd= [HW,CD]
812 Format: <port>,<irq>,<mitsumi_bug_93_wait>
813
814 mcdx= [HW,CD]
815
816 mce [IA-32] Machine Check Exception
817
818 md= [HW] RAID subsystems devices and level
819 See Documentation/md.txt.
Randy Dunlapa9913042005-10-23 12:57:11 -0700820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 mdacon= [MDA]
822 Format: <first>,<last>
823 Specifies range of consoles to be captured by the MDA.
Randy Dunlapa9913042005-10-23 12:57:11 -0700824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
826 Amount of memory to be used when the kernel is not able
827 to see the whole system memory or for test.
828 [IA-32] Use together with memmap= to avoid physical
829 address space collisions. Without memmap= PCI devices
830 could be placed at addresses belonging to unused RAM.
831
832 mem=nopentium [BUGS=IA-32] Disable usage of 4MB pages for kernel
833 memory.
834
akpm@osdl.org69cda7b2006-01-09 20:51:46 -0800835 memmap=exactmap [KNL,IA-32,X86_64] Enable setting of an exact
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 E820 memory map, as specified by the user.
837 Such memmap=exactmap lines can be constructed based on
838 BIOS output or other requirements. See the memmap=nn@ss
839 option description.
840
841 memmap=nn[KMG]@ss[KMG]
842 [KNL] Force usage of a specific region of memory
843 Region of memory to be used, from ss to ss+nn.
844
845 memmap=nn[KMG]#ss[KMG]
846 [KNL,ACPI] Mark specific memory as ACPI data.
847 Region of memory to be used, from ss to ss+nn.
848
849 memmap=nn[KMG]$ss[KMG]
850 [KNL,ACPI] Mark specific memory as reserved.
851 Region of memory to be used, from ss to ss+nn.
852
853 meye.*= [HW] Set MotionEye Camera parameters
854 See Documentation/video4linux/meye.txt.
855
856 mga= [HW,DRM]
857
858 mousedev.tap_time=
859 [MOUSE] Maximum time between finger touching and
860 leaving touchpad surface for touch to be considered
861 a tap and be reported as a left button click (for
862 touchpads working in absolute mode only).
863 Format: <msecs>
864 mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices
865 reporting absolute coordinates, such as tablets
866 mousedev.yres= [MOUSE] Vertical screen resolution, used for devices
867 reporting absolute coordinates, such as tablets
868
869 mpu401= [HW,OSS]
870 Format: <io>,<irq>
871
872 MTD_Partition= [MTD]
873 Format: <name>,<region-number>,<size>,<offset>
874
Randy Dunlapa9913042005-10-23 12:57:11 -0700875 MTD_Region= [MTD] Format:
876 <name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
878 mtdparts= [MTD]
879 See drivers/mtd/cmdline.c.
880
881 mtouchusb.raw_coordinates=
Randy Dunlapa9913042005-10-23 12:57:11 -0700882 [HW] Make the MicroTouch USB driver use raw coordinates
883 ('y', default) or cooked coordinates ('n')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884
885 n2= [NET] SDL Inc. RISCom/N2 synchronous serial card
886
887 NCR_D700= [HW,SCSI]
888 See header of drivers/scsi/NCR_D700.c.
889
890 ncr5380= [HW,SCSI]
891
892 ncr53c400= [HW,SCSI]
893
894 ncr53c400a= [HW,SCSI]
895
896 ncr53c406a= [HW,SCSI]
897
898 ncr53c8xx= [HW,SCSI]
899
900 netdev= [NET] Network devices parameters
901 Format: <irq>,<io>,<mem_start>,<mem_end>,<name>
902 Note that mem_start is often overloaded to mean
903 something different and driver-specific.
Randy Dunlapa9913042005-10-23 12:57:11 -0700904 This usage is only documented in each driver source
905 file if at all.
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 nfsaddrs= [NFS]
908 See Documentation/nfsroot.txt.
909
910 nfsroot= [NFS] nfs root filesystem for disk-less boxes.
911 See Documentation/nfsroot.txt.
912
Trond Myklebusta72b4422006-01-03 09:55:41 +0100913 nfs.callback_tcpport=
914 [NFS] set the TCP port on which the NFSv4 callback
915 channel should listen.
916
Trond Myklebust58df0952006-01-03 09:55:57 +0100917 nfs.idmap_cache_timeout=
918 [NFS] set the maximum lifetime for idmapper cache
919 entries.
920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 nmi_watchdog= [KNL,BUGS=IA-32] Debugging features for SMP kernels
922
923 no387 [BUGS=IA-32] Tells the kernel to use the 387 maths
924 emulation library even if a 387 maths coprocessor
925 is present.
926
Randy Dunlapa9913042005-10-23 12:57:11 -0700927 noalign [KNL,ARM]
928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 noapic [SMP,APIC] Tells the kernel to not make use of any
930 IOAPICs that may be present in the system.
931
932 noasync [HW,M68K] Disables async and sync negotiation for
933 all devices.
934
935 nobats [PPC] Do not use BATs for mapping kernel lowmem
936 on "Classic" PPC cores.
937
938 nocache [ARM]
Randy Dunlapa9913042005-10-23 12:57:11 -0700939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects.
941
942 noexec [IA-64]
943
Randy Dunlapa9913042005-10-23 12:57:11 -0700944 noexec [IA-32,X86-64]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 noexec=on: enable non-executable mappings (default)
946 noexec=off: disable nn-executable mappings
947
948 nofxsr [BUGS=IA-32]
949
950 nohlt [BUGS=ARM]
Randy Dunlapa9913042005-10-23 12:57:11 -0700951
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 no-hlt [BUGS=IA-32] Tells the kernel that the hlt
953 instruction doesn't work correctly and not to
954 use it.
955
956 nohalt [IA-64] Tells the kernel not to use the power saving
957 function PAL_HALT_LIGHT when idle. This increases
958 power-consumption. On the positive side, it reduces
959 interrupt wake-up latency, which may improve performance
960 in certain environments such as networked servers or
961 real-time systems.
962
963 noirqdebug [IA-32] Disables the code which attempts to detect and
964 disable unhandled interrupt sources.
965
966 noisapnp [ISAPNP] Disables ISA PnP code.
967
968 noinitrd [RAM] Tells the kernel not to load any configured
969 initial RAM disk.
970
971 nointroute [IA-64]
972
973 nolapic [IA-32,APIC] Do not enable or use the local APIC.
974
975 noltlbs [PPC] Do not use large page/tlb entries for kernel
976 lowmem mapping on PPC40x.
977
978 nomce [IA-32] Machine Check Exception
979
980 noresidual [PPC] Don't use residual data on PReP machines.
981
Randy Dunlapa9913042005-10-23 12:57:11 -0700982 noresume [SWSUSP] Disables resume and restores original swap
983 space.
984
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 no-scroll [VGA] Disables scrollback.
986 This is required for the Braillex ib80-piezo Braille
987 reader made by F.H. Papenmeier (Germany).
988
989 nosbagart [IA-64]
990
991 nosmp [SMP] Tells an SMP kernel to act as a UP kernel.
992
993 nosync [HW,M68K] Disables sync negotiation for all devices.
994
995 notsc [BUGS=IA-32] Disable Time Stamp Counter
996
997 nousb [USB] Disable the USB subsystem
998
999 nowb [ARM]
Randy Dunlapa9913042005-10-23 12:57:11 -07001000
Dave Jonesa61c2d72006-01-07 23:18:19 +00001001 nr_uarts= [SERIAL] maximum number of UARTs to be registered.
1002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 opl3= [HW,OSS]
1004 Format: <io>
1005
1006 opl3sa= [HW,OSS]
1007 Format: <io>,<irq>,<dma>,<dma2>,<mpu_io>,<mpu_irq>
1008
Randy Dunlapa9913042005-10-23 12:57:11 -07001009 opl3sa2= [HW,OSS] Format:
1010 <io>,<irq>,<dma>,<dma2>,<mss_io>,<mpu_io>,<ymode>,<loopback>[,<isapnp>,<multiple]
1011
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 oprofile.timer= [HW]
1013 Use timer interrupt instead of performance counters
1014
1015 optcd= [HW,CD]
1016 Format: <io>
1017
1018 osst= [HW,SCSI] SCSI Tape Driver
1019 Format: <buffer_size>,<write_threshold>
1020 See also Documentation/scsi/st.txt.
1021
1022 panic= [KNL] Kernel behaviour on panic
1023 Format: <timeout>
1024
1025 parkbd.port= [HW] Parallel port number the keyboard adapter is
1026 connected to, default is 0.
1027 Format: <parport#>
1028 parkbd.mode= [HW] Parallel port keyboard adapter mode of operation,
1029 0 for XT, 1 for AT (default is AT).
Randy Dunlapa9913042005-10-23 12:57:11 -07001030 Format: <mode>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
Randy Dunlapa9913042005-10-23 12:57:11 -07001032 parport= [HW,PPT] Specify parallel ports. 0 disables.
1033 Format: { 0 | auto | 0xBBB[,IRQ[,DMA]] }
1034 Use 'auto' to force the driver to use any
1035 IRQ/DMA settings detected (the default is to
1036 ignore detected IRQ/DMA settings because of
1037 possible conflicts). You can specify the base
1038 address, IRQ, and DMA settings; IRQ and DMA
1039 should be numbers, or 'auto' (for using detected
1040 settings on that particular port), or 'nofifo'
1041 (to avoid using a FIFO even if it is detected).
1042 Parallel ports are assigned in the order they
1043 are specified on the command line, starting
1044 with parport0.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045
Randy Dunlapa9913042005-10-23 12:57:11 -07001046 parport_init_mode= [HW,PPT]
1047 Configure VIA parallel port to operate in
1048 a specific mode. This is necessary on Pegasos
1049 computer where firmware has no options for setting
1050 up parallel port mode and sets it to spp.
1051 Currently this function knows 686a and 8231 chips.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 Format: [spp|ps2|epp|ecp|ecpepp]
1053
Randy Dunlapa9913042005-10-23 12:57:11 -07001054 pas2= [HW,OSS] Format:
1055 <io>,<irq>,<dma>,<dma16>,<sb_io>,<sb_irq>,<sb_dma>,<sb_dma16>
1056
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 pas16= [HW,SCSI]
1058 See header of drivers/scsi/pas16.c.
1059
1060 pcbit= [HW,ISDN]
1061
1062 pcd. [PARIDE]
1063 See header of drivers/block/paride/pcd.c.
1064 See also Documentation/paride.txt.
1065
Randy Dunlapa9913042005-10-23 12:57:11 -07001066 pci=option[,option...] [PCI] various PCI subsystem options:
1067 off [IA-32] don't probe for the PCI bus
1068 bios [IA-32] force use of PCI BIOS, don't access
1069 the hardware directly. Use this if your machine
1070 has a non-standard PCI host bridge.
1071 nobios [IA-32] disallow use of PCI BIOS, only direct
1072 hardware access methods are allowed. Use this
1073 if you experience crashes upon bootup and you
1074 suspect they are caused by the BIOS.
1075 conf1 [IA-32] Force use of PCI Configuration
1076 Mechanism 1.
1077 conf2 [IA-32] Force use of PCI Configuration
1078 Mechanism 2.
1079 nosort [IA-32] Don't sort PCI devices according to
1080 order given by the PCI BIOS. This sorting is
1081 done to get a device order compatible with
1082 older kernels.
1083 biosirq [IA-32] Use PCI BIOS calls to get the interrupt
1084 routing table. These calls are known to be buggy
1085 on several machines and they hang the machine
1086 when used, but on other computers it's the only
1087 way to get the interrupt routing table. Try
1088 this option if the kernel is unable to allocate
1089 IRQs or discover secondary PCI buses on your
1090 motherboard.
1091 rom [IA-32] Assign address space to expansion ROMs.
1092 Use with caution as certain devices share
1093 address decoders between ROMs and other
1094 resources.
1095 irqmask=0xMMMM [IA-32] Set a bit mask of IRQs allowed to be
1096 assigned automatically to PCI devices. You can
1097 make the kernel exclude IRQs of your ISA cards
1098 this way.
jayalk@intworks.biz120bb422005-03-21 20:20:42 -08001099 pirqaddr=0xAAAAA [IA-32] Specify the physical address
Randy Dunlapa9913042005-10-23 12:57:11 -07001100 of the PIRQ table (normally generated
1101 by the BIOS) if it is outside the
1102 F0000h-100000h range.
1103 lastbus=N [IA-32] Scan all buses thru bus #N. Can be
1104 useful if the kernel is unable to find your
1105 secondary buses and you want to tell it
1106 explicitly which ones they are.
1107 assign-busses [IA-32] Always assign all PCI bus
1108 numbers ourselves, overriding
1109 whatever the firmware may have done.
1110 usepirqmask [IA-32] Honor the possible IRQ mask stored
1111 in the BIOS $PIR table. This is needed on
1112 some systems with broken BIOSes, notably
1113 some HP Pavilion N5400 and Omnibook XE3
1114 notebooks. This will have no effect if ACPI
1115 IRQ routing is enabled.
1116 noacpi [IA-32] Do not use ACPI for IRQ routing
1117 or for PCI scanning.
1118 routeirq Do IRQ routing for all PCI devices.
1119 This is normally done in pci_enable_device(),
1120 so this option is a temporary workaround
1121 for broken drivers that don't call it.
1122 firmware [ARM] Do not re-enumerate the bus but instead
1123 just use the configuration from the
1124 bootloader. This is currently used on
1125 IXP2000 systems where the bus has to be
1126 configured a certain way for adjunct CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
1128 pcmv= [HW,PCMCIA] BadgePAD 4
1129
1130 pd. [PARIDE]
1131 See Documentation/paride.txt.
1132
1133 pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at
1134 boot time.
1135 Format: { 0 | 1 }
1136 See arch/parisc/kernel/pdc_chassis.c
1137
1138 pf. [PARIDE]
1139 See Documentation/paride.txt.
1140
1141 pg. [PARIDE]
1142 See Documentation/paride.txt.
1143
1144 pirq= [SMP,APIC] Manual mp-table setup
1145 See Documentation/i386/IO-APIC.txt.
1146
1147 plip= [PPT,NET] Parallel port network link
1148 Format: { parport<nr> | timid | 0 }
1149 See also Documentation/parport.txt.
1150
1151 pnpacpi= [ACPI]
1152 { off }
1153
1154 pnpbios= [ISAPNP]
1155 { on | off | curr | res | no-curr | no-res }
1156
1157 pnp_reserve_irq=
1158 [ISAPNP] Exclude IRQs for the autoconfiguration
1159
1160 pnp_reserve_dma=
1161 [ISAPNP] Exclude DMAs for the autoconfiguration
1162
1163 pnp_reserve_io= [ISAPNP] Exclude I/O ports for the autoconfiguration
Randy Dunlapa9913042005-10-23 12:57:11 -07001164 Ranges are in pairs (I/O port base and size).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
1166 pnp_reserve_mem=
Randy Dunlapa9913042005-10-23 12:57:11 -07001167 [ISAPNP] Exclude memory regions for the
1168 autoconfiguration.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 Ranges are in pairs (memory base and size).
1170
1171 profile= [KNL] Enable kernel profiling via /proc/profile
Randy Dunlapa9913042005-10-23 12:57:11 -07001172 Format: [schedule,]<number>
1173 Param: "schedule" - profile schedule points.
1174 Param: <number> - step/bucket size as a power of 2 for
1175 statistical time based profiling.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176
Randy Dunlapa9913042005-10-23 12:57:11 -07001177 processor.max_cstate= [HW,ACPI]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 Limit processor to maximum C-state
1179 max_cstate=9 overrides any DMI blacklist limit.
1180
Len Brown41c0d862005-12-28 12:43:51 -05001181 processor.nocst [HW,ACPI]
1182 Ignore the _CST method to determine C-states,
1183 instead using the legacy FADT method
1184
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
1186 before loading.
1187 See Documentation/ramdisk.txt.
1188
Randy Dunlapa9913042005-10-23 12:57:11 -07001189 psmouse.proto= [HW,MOUSE] Highest PS2 mouse protocol extension to
1190 probe for; one of (bare|imps|exps|lifebook|any).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 psmouse.rate= [HW,MOUSE] Set desired mouse report rate, in reports
1192 per second.
Randy Dunlapa9913042005-10-23 12:57:11 -07001193 psmouse.resetafter= [HW,MOUSE]
1194 Try to reset the device after so many bad packets
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 (0 = never).
1196 psmouse.resolution=
1197 [HW,MOUSE] Set desired mouse resolution, in dpi.
1198 psmouse.smartscroll=
Randy Dunlapa9913042005-10-23 12:57:11 -07001199 [HW,MOUSE] Controls Logitech smartscroll autorepeat.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 0 = disabled, 1 = enabled (default).
1201
1202 pss= [HW,OSS] Personal Sound System (ECHO ESC614)
Randy Dunlapa9913042005-10-23 12:57:11 -07001203 Format:
1204 <io>,<mss_io>,<mss_irq>,<mss_dma>,<mpu_io>,<mpu_irq>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
1206 pt. [PARIDE]
1207 See Documentation/paride.txt.
1208
1209 quiet= [KNL] Disable log messages
Randy Dunlapa9913042005-10-23 12:57:11 -07001210
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 r128= [HW,DRM]
1212
1213 raid= [HW,RAID]
1214 See Documentation/md.txt.
1215
1216 ramdisk= [RAM] Sizes of RAM disks in kilobytes [deprecated]
1217 See Documentation/ramdisk.txt.
1218
Randy Dunlapa9913042005-10-23 12:57:11 -07001219 ramdisk_blocksize= [RAM]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 See Documentation/ramdisk.txt.
Randy Dunlapa9913042005-10-23 12:57:11 -07001221
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
1223 New name for the ramdisk parameter.
1224 See Documentation/ramdisk.txt.
1225
Olof Johanssonffdfc402005-09-06 15:17:19 -07001226 rdinit= [KNL]
1227 Format: <full_path>
1228 Run specified binary instead of /init from the ramdisk,
1229 used for early userspace startup. See initrd.
1230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 reboot= [BUGS=IA-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
1232 Format: <reboot_mode>[,<reboot_mode2>[,...]]
1233 See arch/*/kernel/reboot.c.
1234
1235 reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
1236
Randy Dunlapa9913042005-10-23 12:57:11 -07001237 resume= [SWSUSP]
1238 Specify the partition device for software suspend
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
1240 rhash_entries= [KNL,NET]
1241 Set number of hash buckets for route cache
1242
1243 riscom8= [HW,SERIAL]
1244 Format: <io_board1>[,<io_board2>[,...<io_boardN>]]
1245
1246 ro [KNL] Mount root device read-only on boot
1247
1248 root= [KNL] Root filesystem
1249
1250 rootdelay= [KNL] Delay (in seconds) to pause before attempting to
1251 mount the root filesystem
1252
1253 rootflags= [KNL] Set root filesystem mount option string
1254
1255 rootfstype= [KNL] Set root filesystem type
1256
1257 rw [KNL] Mount root device read-write on boot
1258
1259 S [KNL] Run init in single mode
1260
1261 sa1100ir [NET]
1262 See drivers/net/irda/sa1100_ir.c.
1263
1264 sb= [HW,OSS]
1265 Format: <io>,<irq>,<dma>,<dma2>
1266
1267 sbni= [NET] Granch SBNI12 leased line adapter
Randy Dunlapa9913042005-10-23 12:57:11 -07001268
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 sbpcd= [HW,CD] Soundblaster CD adapter
1270 Format: <io>,<type>
1271 See a comment before function sbpcd_setup() in
1272 drivers/cdrom/sbpcd.c.
1273
1274 sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver
1275 Format: <io>[,<timeout>[,<isapnp>]]
1276
1277 scsi_debug_*= [SCSI]
1278 See drivers/scsi/scsi_debug.c.
1279
1280 scsi_default_dev_flags=
1281 [SCSI] SCSI default device flags
1282 Format: <integer>
1283
1284 scsi_dev_flags= [SCSI] Black/white list entry for vendor and model
1285 Format: <vendor>:<model>:<flags>
1286 (flags are integer value)
1287
1288 scsi_logging= [SCSI]
1289
1290 selinux [SELINUX] Disable or enable SELinux at boot time.
1291 Format: { "0" | "1" }
1292 See security/selinux/Kconfig help text.
1293 0 -- disable.
1294 1 -- enable.
1295 Default value is set via kernel config option.
1296 If enabled at boot time, /selinux/disable can be used
1297 later to disable prior to initial policy load.
1298
1299 serialnumber [BUGS=IA-32]
1300
Randy Dunlapa9913042005-10-23 12:57:11 -07001301 sg_def_reserved_size= [SCSI]
1302
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 sgalaxy= [HW,OSS]
1304 Format: <io>,<irq>,<dma>,<dma2>,<sgbase>
1305
1306 shapers= [NET]
1307 Maximal number of shapers.
Randy Dunlapa9913042005-10-23 12:57:11 -07001308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 sim710= [SCSI,HW]
1310 See header of drivers/scsi/sim710.c.
1311
1312 simeth= [IA-64]
1313 simscsi=
Randy Dunlapa9913042005-10-23 12:57:11 -07001314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 sjcd= [HW,CD]
1316 Format: <io>,<irq>,<dma>
1317 See header of drivers/cdrom/sjcd.c.
1318
1319 slram= [HW,MTD]
1320
1321 smart2= [HW]
1322 Format: <io1>[,<io2>[,...,<io8>]]
1323
1324 snd-ad1816a= [HW,ALSA]
1325
1326 snd-ad1848= [HW,ALSA]
1327
1328 snd-ali5451= [HW,ALSA]
1329
1330 snd-als100= [HW,ALSA]
1331
1332 snd-als4000= [HW,ALSA]
1333
1334 snd-azt2320= [HW,ALSA]
1335
1336 snd-cmi8330= [HW,ALSA]
1337
1338 snd-cmipci= [HW,ALSA]
1339
1340 snd-cs4231= [HW,ALSA]
1341
1342 snd-cs4232= [HW,ALSA]
1343
1344 snd-cs4236= [HW,ALSA]
1345
1346 snd-cs4281= [HW,ALSA]
1347
1348 snd-cs46xx= [HW,ALSA]
1349
1350 snd-dt019x= [HW,ALSA]
1351
1352 snd-dummy= [HW,ALSA]
1353
1354 snd-emu10k1= [HW,ALSA]
1355
1356 snd-ens1370= [HW,ALSA]
1357
1358 snd-ens1371= [HW,ALSA]
1359
1360 snd-es968= [HW,ALSA]
1361
1362 snd-es1688= [HW,ALSA]
1363
1364 snd-es18xx= [HW,ALSA]
1365
1366 snd-es1938= [HW,ALSA]
1367
1368 snd-es1968= [HW,ALSA]
1369
1370 snd-fm801= [HW,ALSA]
1371
1372 snd-gusclassic= [HW,ALSA]
1373
1374 snd-gusextreme= [HW,ALSA]
1375
1376 snd-gusmax= [HW,ALSA]
1377
1378 snd-hdsp= [HW,ALSA]
1379
1380 snd-ice1712= [HW,ALSA]
1381
1382 snd-intel8x0= [HW,ALSA]
1383
1384 snd-interwave= [HW,ALSA]
1385
1386 snd-interwave-stb=
1387 [HW,ALSA]
1388
1389 snd-korg1212= [HW,ALSA]
1390
1391 snd-maestro3= [HW,ALSA]
1392
1393 snd-mpu401= [HW,ALSA]
1394
1395 snd-mtpav= [HW,ALSA]
1396
1397 snd-nm256= [HW,ALSA]
1398
1399 snd-opl3sa2= [HW,ALSA]
1400
1401 snd-opti92x-ad1848=
1402 [HW,ALSA]
1403
1404 snd-opti92x-cs4231=
1405 [HW,ALSA]
1406
1407 snd-opti93x= [HW,ALSA]
1408
1409 snd-pmac= [HW,ALSA]
1410
1411 snd-rme32= [HW,ALSA]
1412
1413 snd-rme96= [HW,ALSA]
1414
1415 snd-rme9652= [HW,ALSA]
1416
1417 snd-sb8= [HW,ALSA]
1418
1419 snd-sb16= [HW,ALSA]
1420
1421 snd-sbawe= [HW,ALSA]
1422
1423 snd-serial= [HW,ALSA]
1424
1425 snd-sgalaxy= [HW,ALSA]
1426
1427 snd-sonicvibes= [HW,ALSA]
1428
1429 snd-sun-amd7930=
1430 [HW,ALSA]
1431
1432 snd-sun-cs4231= [HW,ALSA]
1433
1434 snd-trident= [HW,ALSA]
1435
1436 snd-usb-audio= [HW,ALSA,USB]
1437
1438 snd-via82xx= [HW,ALSA]
1439
1440 snd-virmidi= [HW,ALSA]
1441
1442 snd-wavefront= [HW,ALSA]
1443
1444 snd-ymfpci= [HW,ALSA]
Randy Dunlapa9913042005-10-23 12:57:11 -07001445
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 sonicvibes= [HW,OSS]
1447 Format: <reverb>
Randy Dunlapa9913042005-10-23 12:57:11 -07001448
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 sonycd535= [HW,CD]
1450 Format: <io>[,<irq>]
1451
1452 sonypi.*= [HW] Sony Programmable I/O Control Device driver
1453 See Documentation/sonypi.txt
1454
1455 specialix= [HW,SERIAL] Specialix multi-serial port adapter
1456 See Documentation/specialix.txt.
1457
1458 spia_io_base= [HW,MTD]
1459 spia_fio_base=
1460 spia_pedr=
1461 spia_peddr=
1462
1463 sscape= [HW,OSS]
1464 Format: <io>,<irq>,<dma>,<mpu_io>,<mpu_irq>
Randy Dunlapa9913042005-10-23 12:57:11 -07001465
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466 st= [HW,SCSI] SCSI tape parameters (buffers, etc.)
1467 See Documentation/scsi/st.txt.
1468
1469 st0x= [HW,SCSI]
1470 See header of drivers/scsi/seagate.c.
1471
1472 sti= [PARISC,HW]
1473 Format: <num>
1474 Set the STI (builtin display/keyboard on the HP-PARISC
1475 machines) console (graphic card) which should be used
1476 as the initial boot-console.
1477 See also comment in drivers/video/console/sticore.c.
1478
1479 sti_font= [HW]
1480 See comment in drivers/video/console/sticore.c.
1481
1482 stifb= [HW]
1483 Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]]
1484
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 swiotlb= [IA-64] Number of I/O TLB slabs
Randy Dunlapa9913042005-10-23 12:57:11 -07001486
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 switches= [HW,M68k]
1488
1489 sym53c416= [HW,SCSI]
1490 See header of drivers/scsi/sym53c416.c.
1491
1492 t128= [HW,SCSI]
1493 See header of drivers/scsi/t128.c.
1494
1495 tdfx= [HW,DRM]
1496
1497 thash_entries= [KNL,NET]
1498 Set number of hash buckets for TCP connection
1499
1500 time Show timing data prefixed to each printk message line
1501
1502 tipar.timeout= [HW,PPT]
1503 Set communications timeout in tenths of a second
1504 (default 15).
1505
1506 tipar.delay= [HW,PPT]
1507 Set inter-bit delay in microseconds (default 10).
1508
1509 tmc8xx= [HW,SCSI]
1510 See header of drivers/scsi/seagate.c.
1511
1512 tmscsim= [HW,SCSI]
1513 See comment before function dc390_setup() in
1514 drivers/scsi/tmscsim.c.
1515
1516 tp720= [HW,PS2]
1517
1518 trix= [HW,OSS] MediaTrix AudioTrix Pro
Randy Dunlapa9913042005-10-23 12:57:11 -07001519 Format:
1520 <io>,<irq>,<dma>,<dma2>,<sb_io>,<sb_irq>,<sb_dma>,<mpu_io>,<mpu_irq>
1521
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 tsdev.xres= [TS] Horizontal screen resolution.
1523 tsdev.yres= [TS] Vertical screen resolution.
1524
Randy Dunlapa9913042005-10-23 12:57:11 -07001525 turbografx.map[2|3]= [HW,JOY]
1526 TurboGraFX parallel port interface
1527 Format:
1528 <port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 See also Documentation/input/joystick-parport.txt
1530
1531 u14-34f= [HW,SCSI] UltraStor 14F/34F SCSI host adapter
1532 See header of drivers/scsi/u14-34f.c.
1533
1534 uart401= [HW,OSS]
1535 Format: <io>,<irq>
1536
1537 uart6850= [HW,OSS]
1538 Format: <io>,<irq>
1539
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 usbhid.mousepoll=
1541 [USBHID] The interval which mice are to be polled at.
Randy Dunlapa9913042005-10-23 12:57:11 -07001542
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 video= [FB] Frame buffer configuration
1544 See Documentation/fb/modedb.txt.
1545
1546 vga= [BOOT,IA-32] Select a particular video mode
Randy Dunlapa9913042005-10-23 12:57:11 -07001547 See Documentation/i386/boot.txt and
1548 Documentation/svga.txt.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 Use vga=ask for menu.
1550 This is actually a boot loader parameter; the value is
1551 passed to the kernel using a special protocol.
1552
Randy Dunlapa9913042005-10-23 12:57:11 -07001553 vmalloc=nn[KMG] [KNL,BOOT] Forces the vmalloc area to have an exact
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 size of <nn>. This can be used to increase the
1555 minimum size (128MB on x86). It can also be used to
1556 decrease the size and leave more room for directly
1557 mapped kernel RAM.
1558
1559 vmhalt= [KNL,S390]
1560
Randy Dunlapa9913042005-10-23 12:57:11 -07001561 vmpoff= [KNL,S390]
1562
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 waveartist= [HW,OSS]
1564 Format: <io>,<irq>,<dma>,<dma2>
Randy Dunlapa9913042005-10-23 12:57:11 -07001565
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 wd33c93= [HW,SCSI]
1567 See header of drivers/scsi/wd33c93.c.
1568
1569 wd7000= [HW,SCSI]
1570 See header of drivers/scsi/wd7000.c.
1571
1572 wdt= [WDT] Watchdog
1573 See Documentation/watchdog/watchdog.txt.
1574
1575 xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks.
1576 xd_geo= See header of drivers/block/xd.c.
1577
1578 xirc2ps_cs= [NET,PCMCIA]
Randy Dunlapa9913042005-10-23 12:57:11 -07001579 Format:
1580 <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
1582
Randy Dunlapa9913042005-10-23 12:57:11 -07001583______________________________________________________________________
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584Changelog:
1585
Randy Dunlapa9913042005-10-23 12:57:11 -070015862000-06-?? Mr. Unknown
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 The last known update (for 2.4.0) - the changelog was not kept before.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588
Randy Dunlapa9913042005-10-23 12:57:11 -070015892002-11-24 Petr Baudis <pasky@ucw.cz>
1590 Randy Dunlap <randy.dunlap@verizon.net>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 Update for 2.5.49, description for most of the options introduced,
1592 references to other documentation (C files, READMEs, ..), added S390,
1593 PPC, SPARC, MTD, ALSA and OSS category. Minor corrections and
1594 reformatting.
Randy Dunlapa9913042005-10-23 12:57:11 -07001595
15962005-10-19 Randy Dunlap <rdunlap@xenotime.net>
1597 Lots of typos, whitespace, some reformatting.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598
1599TODO:
1600
1601 Add documentation for ALSA options.
1602 Add more DRM drivers.