Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | # |
| 2 | # For a description of the syntax of this configuration file, |
| 3 | # see Documentation/kbuild/kconfig-language.txt. |
| 4 | # |
| 5 | |
| 6 | mainmenu "Linux Kernel Configuration" |
| 7 | |
Brian Gerst | 0d078f6 | 2005-10-30 14:59:20 -0800 | [diff] [blame] | 8 | config X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | bool |
| 10 | default y |
| 11 | help |
| 12 | This is Linux's home port. Linux was originally native to the Intel |
| 13 | 386, and runs on all the later x86 processors including the Intel |
| 14 | 486, 586, Pentiums, and various instruction-set-compatible chips by |
| 15 | AMD, Cyrix, and others. |
| 16 | |
john stultz | 6f84fa2 | 2006-06-26 00:25:11 -0700 | [diff] [blame] | 17 | config GENERIC_TIME |
| 18 | bool |
| 19 | default y |
| 20 | |
Ingo Molnar | cbbf437 | 2006-07-03 00:25:00 -0700 | [diff] [blame] | 21 | config LOCKDEP_SUPPORT |
| 22 | bool |
| 23 | default y |
| 24 | |
Ingo Molnar | 4a7c719 | 2006-07-03 00:24:39 -0700 | [diff] [blame] | 25 | config STACKTRACE_SUPPORT |
| 26 | bool |
| 27 | default y |
| 28 | |
Benjamin LaHaise | 52fdd08 | 2005-09-03 15:56:52 -0700 | [diff] [blame] | 29 | config SEMAPHORE_SLEEPERS |
| 30 | bool |
| 31 | default y |
| 32 | |
Brian Gerst | 0d078f6 | 2005-10-30 14:59:20 -0800 | [diff] [blame] | 33 | config X86 |
| 34 | bool |
| 35 | default y |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | config MMU |
| 38 | bool |
| 39 | default y |
| 40 | |
| 41 | config SBUS |
| 42 | bool |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | config GENERIC_ISA_DMA |
| 45 | bool |
| 46 | default y |
| 47 | |
| 48 | config GENERIC_IOMAP |
| 49 | bool |
| 50 | default y |
| 51 | |
Akinobu Mita | 1cc2b99 | 2006-03-26 01:39:24 -0800 | [diff] [blame] | 52 | config GENERIC_HWEIGHT |
| 53 | bool |
| 54 | default y |
| 55 | |
viro@ZenIV.linux.org.uk | a08b6b7 | 2005-09-06 01:48:42 +0100 | [diff] [blame] | 56 | config ARCH_MAY_HAVE_PC_FDC |
| 57 | bool |
| 58 | default y |
| 59 | |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 60 | config DMI |
| 61 | bool |
| 62 | default y |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | source "init/Kconfig" |
| 65 | |
| 66 | menu "Processor type and features" |
| 67 | |
Adrian Bunk | edd711f | 2006-04-10 22:53:14 -0700 | [diff] [blame] | 68 | config SMP |
| 69 | bool "Symmetric multi-processing support" |
| 70 | ---help--- |
| 71 | This enables support for systems with more than one CPU. If you have |
| 72 | a system with only one CPU, like most personal computers, say N. If |
| 73 | you have a system with more than one CPU, say Y. |
| 74 | |
| 75 | If you say N here, the kernel will run on single and multiprocessor |
| 76 | machines, but will use only one CPU of a multiprocessor machine. If |
| 77 | you say Y here, the kernel will run on many, but not all, |
| 78 | singleprocessor machines. On a singleprocessor machine, the kernel |
| 79 | will run faster if you say N here. |
| 80 | |
| 81 | Note that if you say Y here and choose architecture "586" or |
| 82 | "Pentium" under "Processor family", the kernel will not work on 486 |
| 83 | architectures. Similarly, multiprocessor kernels for the "PPro" |
| 84 | architecture may not work on all Pentium based boards. |
| 85 | |
| 86 | People using multiprocessor machines who say Y here should also say |
| 87 | Y to "Enhanced Real Time Clock Support", below. The "Advanced Power |
| 88 | Management" code will be disabled if you say Y here. |
| 89 | |
| 90 | See also the <file:Documentation/smp.txt>, |
| 91 | <file:Documentation/i386/IO-APIC.txt>, |
| 92 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
| 93 | <http://www.tldp.org/docs.html#howto>. |
| 94 | |
| 95 | If you don't know what to do here, say N. |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | choice |
| 98 | prompt "Subarchitecture Type" |
| 99 | default X86_PC |
| 100 | |
| 101 | config X86_PC |
| 102 | bool "PC-compatible" |
| 103 | help |
| 104 | Choose this option if your computer is a standard PC or compatible. |
| 105 | |
| 106 | config X86_ELAN |
| 107 | bool "AMD Elan" |
| 108 | help |
| 109 | Select this for an AMD Elan processor. |
| 110 | |
| 111 | Do not use this option for K6/Athlon/Opteron processors! |
| 112 | |
| 113 | If unsure, choose "PC-compatible" instead. |
| 114 | |
| 115 | config X86_VOYAGER |
| 116 | bool "Voyager (NCR)" |
| 117 | help |
| 118 | Voyager is an MCA-based 32-way capable SMP architecture proprietary |
| 119 | to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based. |
| 120 | |
| 121 | *** WARNING *** |
| 122 | |
| 123 | If you do not specifically know you have a Voyager based machine, |
| 124 | say N here, otherwise the kernel you build will not be bootable. |
| 125 | |
| 126 | config X86_NUMAQ |
| 127 | bool "NUMAQ (IBM/Sequent)" |
Adrian Bunk | 905c399 | 2006-03-23 02:59:55 -0800 | [diff] [blame] | 128 | select SMP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | select NUMA |
| 130 | help |
| 131 | This option is used for getting Linux to run on a (IBM/Sequent) NUMA |
| 132 | multiquad box. This changes the way that processors are bootstrapped, |
| 133 | and uses Clustered Logical APIC addressing mode instead of Flat Logical. |
| 134 | You will need a new lynxer.elf file to flash your firmware with - send |
| 135 | email to <Martin.Bligh@us.ibm.com>. |
| 136 | |
| 137 | config X86_SUMMIT |
| 138 | bool "Summit/EXA (IBM x440)" |
| 139 | depends on SMP |
| 140 | help |
| 141 | This option is needed for IBM systems that use the Summit/EXA chipset. |
| 142 | In particular, it is needed for the x440. |
| 143 | |
| 144 | If you don't have one of these computers, you should say N here. |
KAMEZAWA Hiroyuki | 38e716a | 2006-08-27 01:24:00 -0700 | [diff] [blame] | 145 | If you want to build a NUMA kernel, you must select ACPI. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | config X86_BIGSMP |
| 148 | bool "Support for other sub-arch SMP systems with more than 8 CPUs" |
| 149 | depends on SMP |
| 150 | help |
| 151 | This option is needed for the systems that have more than 8 CPUs |
| 152 | and if the system is not of any sub-arch type above. |
| 153 | |
| 154 | If you don't have such a system, you should say N here. |
| 155 | |
| 156 | config X86_VISWS |
| 157 | bool "SGI 320/540 (Visual Workstation)" |
| 158 | help |
| 159 | The SGI Visual Workstation series is an IA32-based workstation |
| 160 | based on SGI systems chips with some legacy PC hardware attached. |
| 161 | |
| 162 | Say Y here to create a kernel to run on the SGI 320 or 540. |
| 163 | |
| 164 | A kernel compiled for the Visual Workstation will not run on PCs |
| 165 | and vice versa. See <file:Documentation/sgi-visws.txt> for details. |
| 166 | |
| 167 | config X86_GENERICARCH |
| 168 | bool "Generic architecture (Summit, bigsmp, ES7000, default)" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | help |
| 170 | This option compiles in the Summit, bigsmp, ES7000, default subarchitectures. |
| 171 | It is intended for a generic binary kernel. |
KAMEZAWA Hiroyuki | 38e716a | 2006-08-27 01:24:00 -0700 | [diff] [blame] | 172 | If you want a NUMA kernel, select ACPI. We need SRAT for NUMA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | config X86_ES7000 |
| 175 | bool "Support for Unisys ES7000 IA32 series" |
| 176 | depends on SMP |
| 177 | help |
| 178 | Support for Unisys ES7000 systems. Say 'Y' here if this kernel is |
| 179 | supposed to run on an IA32-based Unisys ES7000 system. |
| 180 | Only choose this option if you have such a system, otherwise you |
| 181 | should say N here. |
| 182 | |
| 183 | endchoice |
| 184 | |
| 185 | config ACPI_SRAT |
| 186 | bool |
| 187 | default y |
Andrew Morton | 55910b2 | 2006-06-30 05:15:00 -0400 | [diff] [blame] | 188 | depends on ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH) |
Yasunori Goto | 762834e | 2006-06-23 02:03:19 -0700 | [diff] [blame] | 189 | select ACPI_NUMA |
| 190 | |
| 191 | config HAVE_ARCH_PARSE_SRAT |
| 192 | bool |
| 193 | default y |
| 194 | depends on ACPI_SRAT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | config X86_SUMMIT_NUMA |
| 197 | bool |
| 198 | default y |
| 199 | depends on NUMA && (X86_SUMMIT || X86_GENERICARCH) |
| 200 | |
| 201 | config X86_CYCLONE_TIMER |
| 202 | bool |
| 203 | default y |
| 204 | depends on X86_SUMMIT || X86_GENERICARCH |
| 205 | |
| 206 | config ES7000_CLUSTERED_APIC |
| 207 | bool |
| 208 | default y |
| 209 | depends on SMP && X86_ES7000 && MPENTIUMIII |
| 210 | |
Paolo 'Blaisorblade' Giarrusso | 96d55b8 | 2005-10-30 15:00:07 -0800 | [diff] [blame] | 211 | source "arch/i386/Kconfig.cpu" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | config HPET_TIMER |
| 214 | bool "HPET Timer Support" |
| 215 | help |
| 216 | This enables the use of the HPET for the kernel's internal timer. |
| 217 | HPET is the next generation timer replacing legacy 8254s. |
| 218 | You can safely choose Y here. However, HPET will only be |
| 219 | activated if the platform and the BIOS support this feature. |
| 220 | Otherwise the 8254 will be used for timing services. |
| 221 | |
| 222 | Choose N to continue using the legacy 8254 timer. |
| 223 | |
| 224 | config HPET_EMULATE_RTC |
Venkatesh Pallipadi | c91096d | 2005-08-04 15:36:10 -0700 | [diff] [blame] | 225 | bool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | depends on HPET_TIMER && RTC=y |
Venkatesh Pallipadi | c91096d | 2005-08-04 15:36:10 -0700 | [diff] [blame] | 227 | default y |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | config NR_CPUS |
| 230 | int "Maximum number of CPUs (2-255)" |
| 231 | range 2 255 |
| 232 | depends on SMP |
| 233 | default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000 |
| 234 | default "8" |
| 235 | help |
| 236 | This allows you to specify the maximum number of CPUs which this |
| 237 | kernel will support. The maximum supported value is 255 and the |
| 238 | minimum value which makes sense is 2. |
| 239 | |
| 240 | This is purely to save memory - each supported CPU adds |
| 241 | approximately eight kilobytes to the kernel image. |
| 242 | |
| 243 | config SCHED_SMT |
| 244 | bool "SMT (Hyperthreading) scheduler support" |
James Bottomley | 96c5274 | 2006-06-27 02:53:49 -0700 | [diff] [blame] | 245 | depends on X86_HT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | help |
| 247 | SMT scheduler support improves the CPU scheduler's decision making |
| 248 | when dealing with Intel Pentium 4 chips with HyperThreading at a |
| 249 | cost of slightly increased overhead in some places. If unsure say |
| 250 | N here. |
| 251 | |
Siddha, Suresh B | 1e9f28f | 2006-03-27 01:15:22 -0800 | [diff] [blame] | 252 | config SCHED_MC |
| 253 | bool "Multi-core scheduler support" |
James Bottomley | 96c5274 | 2006-06-27 02:53:49 -0700 | [diff] [blame] | 254 | depends on X86_HT |
Siddha, Suresh B | 1e9f28f | 2006-03-27 01:15:22 -0800 | [diff] [blame] | 255 | default y |
| 256 | help |
| 257 | Multi-core scheduler support improves the CPU scheduler's decision |
| 258 | making when dealing with multi-core CPU chips at a cost of slightly |
| 259 | increased overhead in some places. If unsure say N here. |
| 260 | |
Ingo Molnar | cc19ca8 | 2005-06-25 14:57:36 -0700 | [diff] [blame] | 261 | source "kernel/Kconfig.preempt" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | config X86_UP_APIC |
| 264 | bool "Local APIC support on uniprocessors" |
Andi Kleen | 874c4fe | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 265 | depends on !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | help |
| 267 | A local APIC (Advanced Programmable Interrupt Controller) is an |
| 268 | integrated interrupt controller in the CPU. If you have a single-CPU |
| 269 | system which has a processor with a local APIC, you can say Y here to |
| 270 | enable and use it. If you say Y here even though your machine doesn't |
| 271 | have a local APIC, then the kernel will still run with no slowdown at |
| 272 | all. The local APIC supports CPU-generated self-interrupts (timer, |
| 273 | performance counters), and the NMI watchdog which detects hard |
| 274 | lockups. |
| 275 | |
| 276 | config X86_UP_IOAPIC |
| 277 | bool "IO-APIC support on uniprocessors" |
| 278 | depends on X86_UP_APIC |
| 279 | help |
| 280 | An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an |
| 281 | SMP-capable replacement for PC-style interrupt controllers. Most |
| 282 | SMP systems and many recent uniprocessor systems have one. |
| 283 | |
| 284 | If you have a single-CPU system with an IO-APIC, you can say Y here |
| 285 | to use it. If you say Y here even though your machine doesn't have |
| 286 | an IO-APIC, then the kernel will still run with no slowdown at all. |
| 287 | |
| 288 | config X86_LOCAL_APIC |
| 289 | bool |
Andi Kleen | 874c4fe | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 290 | depends on X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | default y |
| 292 | |
| 293 | config X86_IO_APIC |
| 294 | bool |
Andi Kleen | 874c4fe | 2006-09-26 10:52:26 +0200 | [diff] [blame] | 295 | depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | default y |
| 297 | |
| 298 | config X86_VISWS_APIC |
| 299 | bool |
| 300 | depends on X86_VISWS |
| 301 | default y |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | config X86_MCE |
| 304 | bool "Machine Check Exception" |
| 305 | depends on !X86_VOYAGER |
| 306 | ---help--- |
| 307 | Machine Check Exception support allows the processor to notify the |
| 308 | kernel if it detects a problem (e.g. overheating, component failure). |
| 309 | The action the kernel takes depends on the severity of the problem, |
| 310 | ranging from a warning message on the console, to halting the machine. |
| 311 | Your processor must be a Pentium or newer to support this - check the |
| 312 | flags in /proc/cpuinfo for mce. Note that some older Pentium systems |
| 313 | have a design flaw which leads to false MCE events - hence MCE is |
| 314 | disabled on all P5 processors, unless explicitly enabled with "mce" |
| 315 | as a boot argument. Similarly, if MCE is built in and creates a |
| 316 | problem on some new non-standard machine, you can boot with "nomce" |
| 317 | to disable it. MCE support simply ignores non-MCE processors like |
| 318 | the 386 and 486, so nearly everyone can say Y here. |
| 319 | |
| 320 | config X86_MCE_NONFATAL |
| 321 | tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4" |
| 322 | depends on X86_MCE |
| 323 | help |
| 324 | Enabling this feature starts a timer that triggers every 5 seconds which |
| 325 | will look at the machine check registers to see if anything happened. |
| 326 | Non-fatal problems automatically get corrected (but still logged). |
| 327 | Disable this if you don't want to see these messages. |
| 328 | Seeing the messages this option prints out may be indicative of dying hardware, |
| 329 | or out-of-spec (ie, overclocked) hardware. |
| 330 | This option only does something on certain CPUs. |
| 331 | (AMD Athlon/Duron and Intel Pentium 4) |
| 332 | |
| 333 | config X86_MCE_P4THERMAL |
| 334 | bool "check for P4 thermal throttling interrupt." |
| 335 | depends on X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS |
| 336 | help |
| 337 | Enabling this feature will cause a message to be printed when the P4 |
| 338 | enters thermal throttling. |
| 339 | |
Andi Kleen | c38bfdc | 2006-06-26 13:58:44 +0200 | [diff] [blame] | 340 | config VM86 |
| 341 | default y |
| 342 | bool "Enable VM86 support" if EMBEDDED |
| 343 | help |
| 344 | This option is required by programs like DOSEMU to run 16-bit legacy |
| 345 | code on X86 processors. It also may be needed by software like |
| 346 | XFree86 to initialize some video cards via BIOS. Disabling this |
| 347 | option saves about 6k. |
| 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | config TOSHIBA |
| 350 | tristate "Toshiba Laptop support" |
| 351 | ---help--- |
| 352 | This adds a driver to safely access the System Management Mode of |
| 353 | the CPU on Toshiba portables with a genuine Toshiba BIOS. It does |
| 354 | not work on models with a Phoenix BIOS. The System Management Mode |
| 355 | is used to set the BIOS and power saving options on Toshiba portables. |
| 356 | |
| 357 | For information on utilities to make use of this driver see the |
| 358 | Toshiba Linux utilities web site at: |
| 359 | <http://www.buzzard.org.uk/toshiba/>. |
| 360 | |
| 361 | Say Y if you intend to run this kernel on a Toshiba portable. |
| 362 | Say N otherwise. |
| 363 | |
| 364 | config I8K |
| 365 | tristate "Dell laptop support" |
| 366 | ---help--- |
| 367 | This adds a driver to safely access the System Management Mode |
| 368 | of the CPU on the Dell Inspiron 8000. The System Management Mode |
| 369 | is used to read cpu temperature and cooling fan status and to |
| 370 | control the fans on the I8K portables. |
| 371 | |
| 372 | This driver has been tested only on the Inspiron 8000 but it may |
| 373 | also work with other Dell laptops. You can force loading on other |
| 374 | models by passing the parameter `force=1' to the module. Use at |
| 375 | your own risk. |
| 376 | |
| 377 | For information on utilities to make use of this driver see the |
| 378 | I8K Linux utilities web site at: |
| 379 | <http://people.debian.org/~dz/i8k/> |
| 380 | |
| 381 | Say Y if you intend to run this kernel on a Dell Inspiron 8000. |
| 382 | Say N otherwise. |
| 383 | |
Jaya Kumar | a2f7c35 | 2005-05-01 08:58:49 -0700 | [diff] [blame] | 384 | config X86_REBOOTFIXUPS |
| 385 | bool "Enable X86 board specific fixups for reboot" |
| 386 | depends on X86 |
| 387 | default n |
| 388 | ---help--- |
| 389 | This enables chipset and/or board specific fixups to be done |
| 390 | in order to get reboot to work correctly. This is only needed on |
| 391 | some combinations of hardware and BIOS. The symptom, for which |
| 392 | this config is intended, is when reboot ends with a stalled/hung |
| 393 | system. |
| 394 | |
| 395 | Currently, the only fixup is for the Geode GX1/CS5530A/TROM2.1. |
| 396 | combination. |
| 397 | |
| 398 | Say Y if you want to enable the fixup. Currently, it's safe to |
| 399 | enable this option even if you don't need it. |
| 400 | Say N otherwise. |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | config MICROCODE |
| 403 | tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support" |
| 404 | ---help--- |
| 405 | If you say Y here and also to "/dev file system support" in the |
| 406 | 'File systems' section, you will be able to update the microcode on |
| 407 | Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II, |
| 408 | Pentium III, Pentium 4, Xeon etc. You will obviously need the |
| 409 | actual microcode binary data itself which is not shipped with the |
| 410 | Linux kernel. |
| 411 | |
| 412 | For latest news and information on obtaining all the required |
| 413 | ingredients for this driver, check: |
| 414 | <http://www.urbanmyth.org/microcode/>. |
| 415 | |
| 416 | To compile this driver as a module, choose M here: the |
| 417 | module will be called microcode. |
| 418 | |
Shaohua Li | 9a3110b | 2006-09-27 01:50:51 -0700 | [diff] [blame^] | 419 | config MICROCODE_OLD_INTERFACE |
| 420 | bool |
| 421 | depends on MICROCODE |
| 422 | default y |
| 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | config X86_MSR |
| 425 | tristate "/dev/cpu/*/msr - Model-specific register support" |
| 426 | help |
| 427 | This device gives privileged processes access to the x86 |
| 428 | Model-Specific Registers (MSRs). It is a character device with |
| 429 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. |
| 430 | MSR accesses are directed to a specific CPU on multi-processor |
| 431 | systems. |
| 432 | |
| 433 | config X86_CPUID |
| 434 | tristate "/dev/cpu/*/cpuid - CPU information support" |
| 435 | help |
| 436 | This device gives processes access to the x86 CPUID instruction to |
| 437 | be executed on a specific processor. It is a character device |
| 438 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to |
| 439 | /dev/cpu/31/cpuid. |
| 440 | |
| 441 | source "drivers/firmware/Kconfig" |
| 442 | |
| 443 | choice |
| 444 | prompt "High Memory Support" |
| 445 | default NOHIGHMEM |
| 446 | |
| 447 | config NOHIGHMEM |
| 448 | bool "off" |
Adrian Bunk | 905c399 | 2006-03-23 02:59:55 -0800 | [diff] [blame] | 449 | depends on !X86_NUMAQ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | ---help--- |
| 451 | Linux can use up to 64 Gigabytes of physical memory on x86 systems. |
| 452 | However, the address space of 32-bit x86 processors is only 4 |
| 453 | Gigabytes large. That means that, if you have a large amount of |
| 454 | physical memory, not all of it can be "permanently mapped" by the |
| 455 | kernel. The physical memory that's not permanently mapped is called |
| 456 | "high memory". |
| 457 | |
| 458 | If you are compiling a kernel which will never run on a machine with |
| 459 | more than 1 Gigabyte total physical RAM, answer "off" here (default |
| 460 | choice and suitable for most users). This will result in a "3GB/1GB" |
| 461 | split: 3GB are mapped so that each process sees a 3GB virtual memory |
| 462 | space and the remaining part of the 4GB virtual memory space is used |
| 463 | by the kernel to permanently map as much physical memory as |
| 464 | possible. |
| 465 | |
| 466 | If the machine has between 1 and 4 Gigabytes physical RAM, then |
| 467 | answer "4GB" here. |
| 468 | |
| 469 | If more than 4 Gigabytes is used then answer "64GB" here. This |
| 470 | selection turns Intel PAE (Physical Address Extension) mode on. |
| 471 | PAE implements 3-level paging on IA32 processors. PAE is fully |
| 472 | supported by Linux, PAE mode is implemented on all recent Intel |
| 473 | processors (Pentium Pro and better). NOTE: If you say "64GB" here, |
| 474 | then the kernel will not boot on CPUs that don't support PAE! |
| 475 | |
| 476 | The actual amount of total physical memory will either be |
| 477 | auto detected or can be forced by using a kernel command line option |
| 478 | such as "mem=256M". (Try "man bootparam" or see the documentation of |
| 479 | your boot loader (lilo or loadlin) about how to pass options to the |
| 480 | kernel at boot time.) |
| 481 | |
| 482 | If unsure, say "off". |
| 483 | |
| 484 | config HIGHMEM4G |
| 485 | bool "4GB" |
Adrian Bunk | 905c399 | 2006-03-23 02:59:55 -0800 | [diff] [blame] | 486 | depends on !X86_NUMAQ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | help |
| 488 | Select this if you have a 32-bit processor and between 1 and 4 |
| 489 | gigabytes of physical RAM. |
| 490 | |
| 491 | config HIGHMEM64G |
| 492 | bool "64GB" |
Adrian Bunk | 4be68a7 | 2006-02-04 23:28:05 -0800 | [diff] [blame] | 493 | depends on X86_CMPXCHG64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | help |
| 495 | Select this if you have a 32-bit processor and more than 4 |
| 496 | gigabytes of physical RAM. |
| 497 | |
| 498 | endchoice |
| 499 | |
Mark Lord | 975b3d3 | 2006-02-01 03:06:11 -0800 | [diff] [blame] | 500 | choice |
Dave Hansen | 753b9f8 | 2006-09-25 23:32:29 -0700 | [diff] [blame] | 501 | depends on EXPERIMENTAL |
Andi Kleen | 9539d4e | 2006-04-27 18:39:36 -0700 | [diff] [blame] | 502 | prompt "Memory split" if EMBEDDED |
Mark Lord | 975b3d3 | 2006-02-01 03:06:11 -0800 | [diff] [blame] | 503 | default VMSPLIT_3G |
| 504 | help |
| 505 | Select the desired split between kernel and user memory. |
| 506 | |
| 507 | If the address range available to the kernel is less than the |
| 508 | physical memory installed, the remaining memory will be available |
| 509 | as "high memory". Accessing high memory is a little more costly |
| 510 | than low memory, as it needs to be mapped into the kernel first. |
| 511 | Note that increasing the kernel address space limits the range |
| 512 | available to user programs, making the address space there |
| 513 | tighter. Selecting anything other than the default 3G/1G split |
| 514 | will also likely make your kernel incompatible with binary-only |
| 515 | kernel modules. |
| 516 | |
| 517 | If you are not absolutely sure what you are doing, leave this |
| 518 | option alone! |
| 519 | |
| 520 | config VMSPLIT_3G |
| 521 | bool "3G/1G user/kernel split" |
| 522 | config VMSPLIT_3G_OPT |
Dave Hansen | 753b9f8 | 2006-09-25 23:32:29 -0700 | [diff] [blame] | 523 | depends on !HIGHMEM |
Mark Lord | 975b3d3 | 2006-02-01 03:06:11 -0800 | [diff] [blame] | 524 | bool "3G/1G user/kernel split (for full 1G low memory)" |
| 525 | config VMSPLIT_2G |
| 526 | bool "2G/2G user/kernel split" |
| 527 | config VMSPLIT_1G |
| 528 | bool "1G/3G user/kernel split" |
| 529 | endchoice |
| 530 | |
| 531 | config PAGE_OFFSET |
| 532 | hex |
| 533 | default 0xB0000000 if VMSPLIT_3G_OPT |
| 534 | default 0x78000000 if VMSPLIT_2G |
| 535 | default 0x40000000 if VMSPLIT_1G |
| 536 | default 0xC0000000 |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | config HIGHMEM |
| 539 | bool |
| 540 | depends on HIGHMEM64G || HIGHMEM4G |
| 541 | default y |
| 542 | |
| 543 | config X86_PAE |
| 544 | bool |
| 545 | depends on HIGHMEM64G |
| 546 | default y |
Greg Kroah-Hartman | 6550e07 | 2006-06-12 17:11:31 -0700 | [diff] [blame] | 547 | select RESOURCES_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | # Common NUMA Features |
| 550 | config NUMA |
| 551 | bool "Numa Memory Allocation and Scheduler Support" |
KAMEZAWA Hiroyuki | 38e716a | 2006-08-27 01:24:00 -0700 | [diff] [blame] | 552 | depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | default n if X86_PC |
| 554 | default y if (X86_NUMAQ || X86_SUMMIT) |
| 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" |
| 557 | depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI) |
| 558 | |
Yasunori Goto | c80d79d | 2006-04-10 22:53:53 -0700 | [diff] [blame] | 559 | config NODES_SHIFT |
| 560 | int |
| 561 | default "4" if X86_NUMAQ |
| 562 | default "3" |
| 563 | depends on NEED_MULTIPLE_NODES |
| 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | config HAVE_ARCH_BOOTMEM_NODE |
| 566 | bool |
| 567 | depends on NUMA |
| 568 | default y |
| 569 | |
Andy Whitcroft | af70536 | 2005-06-23 00:07:53 -0700 | [diff] [blame] | 570 | config ARCH_HAVE_MEMORY_PRESENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | bool |
| 572 | depends on DISCONTIGMEM |
| 573 | default y |
| 574 | |
| 575 | config NEED_NODE_MEMMAP_SIZE |
| 576 | bool |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 577 | depends on DISCONTIGMEM || SPARSEMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | default y |
| 579 | |
Dave Hansen | 6f167ec | 2005-06-23 00:07:39 -0700 | [diff] [blame] | 580 | config HAVE_ARCH_ALLOC_REMAP |
| 581 | bool |
| 582 | depends on NUMA |
| 583 | default y |
| 584 | |
Andy Whitcroft | 215c340 | 2006-01-06 00:12:06 -0800 | [diff] [blame] | 585 | config ARCH_FLATMEM_ENABLE |
| 586 | def_bool y |
| 587 | depends on (ARCH_SELECT_MEMORY_MODEL && X86_PC) |
| 588 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 589 | config ARCH_DISCONTIGMEM_ENABLE |
| 590 | def_bool y |
| 591 | depends on NUMA |
| 592 | |
| 593 | config ARCH_DISCONTIGMEM_DEFAULT |
| 594 | def_bool y |
| 595 | depends on NUMA |
| 596 | |
| 597 | config ARCH_SPARSEMEM_ENABLE |
| 598 | def_bool y |
Andy Whitcroft | 215c340 | 2006-01-06 00:12:06 -0800 | [diff] [blame] | 599 | depends on (NUMA || (X86_PC && EXPERIMENTAL)) |
| 600 | select SPARSEMEM_STATIC |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 601 | |
| 602 | config ARCH_SELECT_MEMORY_MODEL |
| 603 | def_bool y |
| 604 | depends on ARCH_SPARSEMEM_ENABLE |
| 605 | |
Mel Gorman | 4cfee88 | 2006-09-27 01:49:51 -0700 | [diff] [blame] | 606 | config ARCH_POPULATES_NODE_MAP |
| 607 | def_bool y |
Dave Hansen | 3f22ab2 | 2005-06-23 00:07:43 -0700 | [diff] [blame] | 608 | |
Mel Gorman | 4cfee88 | 2006-09-27 01:49:51 -0700 | [diff] [blame] | 609 | source "mm/Kconfig" |
Andy Whitcroft | b159d43 | 2005-06-23 00:07:52 -0700 | [diff] [blame] | 610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | config HIGHPTE |
| 612 | bool "Allocate 3rd-level pagetables from highmem" |
| 613 | depends on HIGHMEM4G || HIGHMEM64G |
| 614 | help |
| 615 | The VM uses one page table entry for each page of physical memory. |
| 616 | For systems with a lot of RAM, this can be wasteful of precious |
| 617 | low memory. Setting this option will put user-space page table |
| 618 | entries in high memory. |
| 619 | |
| 620 | config MATH_EMULATION |
| 621 | bool "Math emulation" |
| 622 | ---help--- |
| 623 | Linux can emulate a math coprocessor (used for floating point |
| 624 | operations) if you don't have one. 486DX and Pentium processors have |
| 625 | a math coprocessor built in, 486SX and 386 do not, unless you added |
| 626 | a 487DX or 387, respectively. (The messages during boot time can |
| 627 | give you some hints here ["man dmesg"].) Everyone needs either a |
| 628 | coprocessor or this emulation. |
| 629 | |
| 630 | If you don't have a math coprocessor, you need to say Y here; if you |
| 631 | say Y here even though you have a coprocessor, the coprocessor will |
| 632 | be used nevertheless. (This behavior can be changed with the kernel |
| 633 | command line option "no387", which comes handy if your coprocessor |
| 634 | is broken. Try "man bootparam" or see the documentation of your boot |
| 635 | loader (lilo or loadlin) about how to pass options to the kernel at |
| 636 | boot time.) This means that it is a good idea to say Y here if you |
| 637 | intend to use this kernel on different machines. |
| 638 | |
| 639 | More information about the internals of the Linux math coprocessor |
| 640 | emulation can be found in <file:arch/i386/math-emu/README>. |
| 641 | |
| 642 | If you are not sure, say Y; apart from resulting in a 66 KB bigger |
| 643 | kernel, it won't hurt. |
| 644 | |
| 645 | config MTRR |
| 646 | bool "MTRR (Memory Type Range Register) support" |
| 647 | ---help--- |
| 648 | On Intel P6 family processors (Pentium Pro, Pentium II and later) |
| 649 | the Memory Type Range Registers (MTRRs) may be used to control |
| 650 | processor access to memory ranges. This is most useful if you have |
| 651 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining |
| 652 | allows bus write transfers to be combined into a larger transfer |
| 653 | before bursting over the PCI/AGP bus. This can increase performance |
| 654 | of image write operations 2.5 times or more. Saying Y here creates a |
| 655 | /proc/mtrr file which may be used to manipulate your processor's |
| 656 | MTRRs. Typically the X server should use this. |
| 657 | |
| 658 | This code has a reasonably generic interface so that similar |
| 659 | control registers on other processors can be easily supported |
| 660 | as well: |
| 661 | |
| 662 | The Cyrix 6x86, 6x86MX and M II processors have Address Range |
| 663 | Registers (ARRs) which provide a similar functionality to MTRRs. For |
| 664 | these, the ARRs are used to emulate the MTRRs. |
| 665 | The AMD K6-2 (stepping 8 and above) and K6-3 processors have two |
| 666 | MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing |
| 667 | write-combining. All of these processors are supported by this code |
| 668 | and it makes sense to say Y here if you have one of them. |
| 669 | |
| 670 | Saying Y here also fixes a problem with buggy SMP BIOSes which only |
| 671 | set the MTRRs for the boot CPU and not for the secondary CPUs. This |
| 672 | can lead to all sorts of problems, so it's good to say Y here. |
| 673 | |
| 674 | You can safely say Y even if your machine doesn't have MTRRs, you'll |
| 675 | just add about 9 KB to your kernel. |
| 676 | |
| 677 | See <file:Documentation/mtrr.txt> for more information. |
| 678 | |
| 679 | config EFI |
Arthur Othieno | c8e5429 | 2006-07-30 03:03:22 -0700 | [diff] [blame] | 680 | bool "Boot from EFI support" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | depends on ACPI |
| 682 | default n |
| 683 | ---help--- |
| 684 | This enables the the kernel to boot on EFI platforms using |
| 685 | system configuration information passed to it from the firmware. |
| 686 | This also enables the kernel to use any EFI runtime services that are |
| 687 | available (such as the EFI variable services). |
| 688 | |
| 689 | This option is only useful on systems that have EFI firmware |
| 690 | and will result in a kernel image that is ~8k larger. In addition, |
| 691 | you must use the latest ELILO loader available at |
| 692 | <http://elilo.sourceforge.net> in order to take advantage of |
| 693 | kernel initialization using EFI information (neither GRUB nor LILO know |
| 694 | anything about EFI). However, even with this option, the resultant |
| 695 | kernel should continue to boot on existing non-EFI platforms. |
| 696 | |
| 697 | config IRQBALANCE |
| 698 | bool "Enable kernel irq balancing" |
| 699 | depends on SMP && X86_IO_APIC |
| 700 | default y |
| 701 | help |
| 702 | The default yes will allow the kernel to do irq load balancing. |
| 703 | Saying no will keep the kernel from doing irq load balancing. |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | # turning this on wastes a bunch of space. |
| 706 | # Summit needs it only when NUMA is on |
| 707 | config BOOT_IOREMAP |
| 708 | bool |
| 709 | depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI)) |
| 710 | default y |
| 711 | |
| 712 | config REGPARM |
Adrian Bunk | 69ef414 | 2006-03-23 02:59:28 -0800 | [diff] [blame] | 713 | bool "Use register arguments" |
Ingo Molnar | b824eb6 | 2006-03-23 02:59:29 -0800 | [diff] [blame] | 714 | default y |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | help |
Ingo Molnar | b824eb6 | 2006-03-23 02:59:29 -0800 | [diff] [blame] | 716 | Compile the kernel with -mregparm=3. This instructs gcc to use |
| 717 | a more efficient function call ABI which passes the first three |
| 718 | arguments of a function call via registers, which results in denser |
| 719 | and faster code. |
| 720 | |
| 721 | If this option is disabled, then the default ABI of passing |
| 722 | arguments via the stack is used. |
| 723 | |
| 724 | If unsure, say Y. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | config SECCOMP |
| 727 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 728 | depends on PROC_FS |
| 729 | default y |
| 730 | help |
| 731 | This kernel feature is useful for number crunching applications |
| 732 | that may need to compute untrusted bytecode during their |
| 733 | execution. By using pipes or other transports made available to |
| 734 | the process as file descriptors supporting the read/write |
| 735 | syscalls, it's possible to isolate those applications in |
| 736 | their own address space using seccomp. Once seccomp is |
| 737 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 738 | and the task is only allowed to execute a few safe syscalls |
| 739 | defined by each seccomp mode. |
| 740 | |
| 741 | If unsure, say Y. Only embedded should say N here. |
| 742 | |
Christoph Lameter | 5912100 | 2005-06-23 00:08:25 -0700 | [diff] [blame] | 743 | source kernel/Kconfig.hz |
| 744 | |
Eric W. Biederman | 5033cba | 2005-06-25 14:57:56 -0700 | [diff] [blame] | 745 | config KEXEC |
Eric W. Biederman | 371c2f2 | 2006-09-26 10:52:40 +0200 | [diff] [blame] | 746 | bool "kexec system call" |
Eric W. Biederman | 5033cba | 2005-06-25 14:57:56 -0700 | [diff] [blame] | 747 | help |
| 748 | kexec is a system call that implements the ability to shutdown your |
| 749 | current kernel, and to start another kernel. It is like a reboot |
Egry Gabor | 48a1204 | 2006-06-26 18:47:15 +0200 | [diff] [blame] | 750 | but it is independent of the system firmware. And like a reboot |
Eric W. Biederman | 5033cba | 2005-06-25 14:57:56 -0700 | [diff] [blame] | 751 | you can start any kernel with it, not just Linux. |
| 752 | |
Matt LaPlante | 1f1332f | 2006-06-29 01:32:47 -0400 | [diff] [blame] | 753 | The name comes from the similarity to the exec system call. |
Eric W. Biederman | 5033cba | 2005-06-25 14:57:56 -0700 | [diff] [blame] | 754 | |
| 755 | It is an ongoing process to be certain the hardware in a machine |
| 756 | is properly shutdown, so do not be surprised if this code does not |
| 757 | initially work for you. It may help to enable device hotplugging |
| 758 | support. As of this writing the exact hardware interface is |
| 759 | strongly in flux, so no good recommendation can be made. |
| 760 | |
Vivek Goyal | 5f01645 | 2005-06-25 14:58:19 -0700 | [diff] [blame] | 761 | config CRASH_DUMP |
| 762 | bool "kernel crash dumps (EXPERIMENTAL)" |
Vivek Goyal | 5f01645 | 2005-06-25 14:58:19 -0700 | [diff] [blame] | 763 | depends on EXPERIMENTAL |
| 764 | depends on HIGHMEM |
| 765 | help |
| 766 | Generate crash dump after being started by kexec. |
Andi Kleen | 1edf777 | 2006-09-26 10:52:35 +0200 | [diff] [blame] | 767 | This should be normally only set in special crash dump kernels |
| 768 | which are loaded in the main kernel with kexec-tools into |
| 769 | a specially reserved region and then later executed after |
| 770 | a crash by kdump/kexec. The crash dump kernel must be compiled |
| 771 | to a memory address not used by the main kernel or BIOS using |
| 772 | PHYSICAL_START. |
| 773 | For more details see Documentation/kdump/kdump.txt |
Maneesh Soni | 05970d4 | 2006-01-09 20:51:52 -0800 | [diff] [blame] | 774 | |
| 775 | config PHYSICAL_START |
| 776 | hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) |
| 777 | |
| 778 | default "0x1000000" if CRASH_DUMP |
| 779 | default "0x100000" |
| 780 | help |
| 781 | This gives the physical address where the kernel is loaded. Normally |
| 782 | for regular kernels this value is 0x100000 (1MB). But in the case |
| 783 | of kexec on panic the fail safe kernel needs to run at a different |
| 784 | address than the panic-ed kernel. This option is used to set the load |
| 785 | address for kernels used to capture crash dump on being kexec'ed |
| 786 | after panic. The default value for crash dump kernels is |
| 787 | 0x1000000 (16MB). This can also be set based on the "X" value as |
| 788 | specified in the "crashkernel=YM@XM" command line boot parameter |
| 789 | passed to the panic-ed kernel. Typically this parameter is set as |
| 790 | crashkernel=64M@16M. Please take a look at |
| 791 | Documentation/kdump/kdump.txt for more details about crash dumps. |
| 792 | |
| 793 | Don't change this unless you know what you are doing. |
| 794 | |
Randy Dunlap | ce63ad7 | 2006-01-14 13:20:51 -0800 | [diff] [blame] | 795 | config HOTPLUG_CPU |
| 796 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" |
Ashok Raj | 35076bd | 2006-04-27 18:39:30 -0700 | [diff] [blame] | 797 | depends on SMP && HOTPLUG && EXPERIMENTAL && !X86_VOYAGER |
Randy Dunlap | ce63ad7 | 2006-01-14 13:20:51 -0800 | [diff] [blame] | 798 | ---help--- |
Pavel Machek | b2d596d | 2006-05-15 09:44:34 -0700 | [diff] [blame] | 799 | Say Y here to experiment with turning CPUs off and on, and to |
| 800 | enable suspend on SMP systems. CPUs can be controlled through |
| 801 | /sys/devices/system/cpu. |
Randy Dunlap | ce63ad7 | 2006-01-14 13:20:51 -0800 | [diff] [blame] | 802 | |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 803 | config COMPAT_VDSO |
| 804 | bool "Compat VDSO support" |
| 805 | default y |
Jeremy Fitzhardinge | 052e799 | 2006-09-25 23:32:25 -0700 | [diff] [blame] | 806 | depends on !PARAVIRT |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 807 | help |
| 808 | Map the VDSO to the predictable old-style address too. |
| 809 | ---help--- |
| 810 | Say N here if you are running a sufficiently recent glibc |
| 811 | version (2.3.3 or later), to remove the high-mapped |
| 812 | VDSO mapping and to exclusively use the randomized VDSO. |
| 813 | |
| 814 | If unsure, say Y. |
Randy Dunlap | ce63ad7 | 2006-01-14 13:20:51 -0800 | [diff] [blame] | 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | endmenu |
| 817 | |
Yasunori Goto | cc57637 | 2006-06-29 02:24:27 -0700 | [diff] [blame] | 818 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 819 | def_bool y |
| 820 | depends on HIGHMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | menu "Power management options (ACPI, APM)" |
| 823 | depends on !X86_VOYAGER |
| 824 | |
| 825 | source kernel/power/Kconfig |
| 826 | |
| 827 | source "drivers/acpi/Kconfig" |
| 828 | |
| 829 | menu "APM (Advanced Power Management) BIOS Support" |
| 830 | depends on PM && !X86_VISWS |
| 831 | |
| 832 | config APM |
| 833 | tristate "APM (Advanced Power Management) BIOS support" |
Dave Jones | 987d461 | 2006-01-08 01:05:09 -0800 | [diff] [blame] | 834 | depends on PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | ---help--- |
| 836 | APM is a BIOS specification for saving power using several different |
| 837 | techniques. This is mostly useful for battery powered laptops with |
| 838 | APM compliant BIOSes. If you say Y here, the system time will be |
| 839 | reset after a RESUME operation, the /proc/apm device will provide |
| 840 | battery status information, and user-space programs will receive |
| 841 | notification of APM "events" (e.g. battery status change). |
| 842 | |
| 843 | If you select "Y" here, you can disable actual use of the APM |
| 844 | BIOS by passing the "apm=off" option to the kernel at boot time. |
| 845 | |
| 846 | Note that the APM support is almost completely disabled for |
| 847 | machines with more than one CPU. |
| 848 | |
| 849 | In order to use APM, you will need supporting software. For location |
| 850 | and more information, read <file:Documentation/pm.txt> and the |
| 851 | Battery Powered Linux mini-HOWTO, available from |
| 852 | <http://www.tldp.org/docs.html#howto>. |
| 853 | |
| 854 | This driver does not spin down disk drives (see the hdparm(8) |
| 855 | manpage ("man 8 hdparm") for that), and it doesn't turn off |
| 856 | VESA-compliant "green" monitors. |
| 857 | |
| 858 | This driver does not support the TI 4000M TravelMate and the ACER |
| 859 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" |
| 860 | desktop machines also don't have compliant BIOSes, and this driver |
| 861 | may cause those machines to panic during the boot phase. |
| 862 | |
| 863 | Generally, if you don't have a battery in your machine, there isn't |
| 864 | much point in using this driver and you should say N. If you get |
| 865 | random kernel OOPSes or reboots that don't seem to be related to |
| 866 | anything, try disabling/enabling this option (or disabling/enabling |
| 867 | APM in your BIOS). |
| 868 | |
| 869 | Some other things you should try when experiencing seemingly random, |
| 870 | "weird" problems: |
| 871 | |
| 872 | 1) make sure that you have enough swap space and that it is |
| 873 | enabled. |
| 874 | 2) pass the "no-hlt" option to the kernel |
| 875 | 3) switch on floating point emulation in the kernel and pass |
| 876 | the "no387" option to the kernel |
| 877 | 4) pass the "floppy=nodma" option to the kernel |
| 878 | 5) pass the "mem=4M" option to the kernel (thereby disabling |
| 879 | all but the first 4 MB of RAM) |
| 880 | 6) make sure that the CPU is not over clocked. |
| 881 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> |
| 882 | 8) disable the cache from your BIOS settings |
| 883 | 9) install a fan for the video card or exchange video RAM |
| 884 | 10) install a better fan for the CPU |
| 885 | 11) exchange RAM chips |
| 886 | 12) exchange the motherboard. |
| 887 | |
| 888 | To compile this driver as a module, choose M here: the |
| 889 | module will be called apm. |
| 890 | |
| 891 | config APM_IGNORE_USER_SUSPEND |
| 892 | bool "Ignore USER SUSPEND" |
| 893 | depends on APM |
| 894 | help |
| 895 | This option will ignore USER SUSPEND requests. On machines with a |
| 896 | compliant APM BIOS, you want to say N. However, on the NEC Versa M |
| 897 | series notebooks, it is necessary to say Y because of a BIOS bug. |
| 898 | |
| 899 | config APM_DO_ENABLE |
| 900 | bool "Enable PM at boot time" |
| 901 | depends on APM |
| 902 | ---help--- |
| 903 | Enable APM features at boot time. From page 36 of the APM BIOS |
| 904 | specification: "When disabled, the APM BIOS does not automatically |
| 905 | power manage devices, enter the Standby State, enter the Suspend |
| 906 | State, or take power saving steps in response to CPU Idle calls." |
| 907 | This driver will make CPU Idle calls when Linux is idle (unless this |
| 908 | feature is turned off -- see "Do CPU IDLE calls", below). This |
| 909 | should always save battery power, but more complicated APM features |
| 910 | will be dependent on your BIOS implementation. You may need to turn |
| 911 | this option off if your computer hangs at boot time when using APM |
| 912 | support, or if it beeps continuously instead of suspending. Turn |
| 913 | this off if you have a NEC UltraLite Versa 33/C or a Toshiba |
| 914 | T400CDT. This is off by default since most machines do fine without |
| 915 | this feature. |
| 916 | |
| 917 | config APM_CPU_IDLE |
| 918 | bool "Make CPU Idle calls when idle" |
| 919 | depends on APM |
| 920 | help |
| 921 | Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. |
| 922 | On some machines, this can activate improved power savings, such as |
| 923 | a slowed CPU clock rate, when the machine is idle. These idle calls |
| 924 | are made after the idle loop has run for some length of time (e.g., |
| 925 | 333 mS). On some machines, this will cause a hang at boot time or |
| 926 | whenever the CPU becomes idle. (On machines with more than one CPU, |
| 927 | this option does nothing.) |
| 928 | |
| 929 | config APM_DISPLAY_BLANK |
| 930 | bool "Enable console blanking using APM" |
| 931 | depends on APM |
| 932 | help |
| 933 | Enable console blanking using the APM. Some laptops can use this to |
| 934 | turn off the LCD backlight when the screen blanker of the Linux |
| 935 | virtual console blanks the screen. Note that this is only used by |
| 936 | the virtual console screen blanker, and won't turn off the backlight |
| 937 | when using the X Window system. This also doesn't have anything to |
| 938 | do with your VESA-compliant power-saving monitor. Further, this |
| 939 | option doesn't work for all laptops -- it might not turn off your |
| 940 | backlight at all, or it might print a lot of errors to the console, |
| 941 | especially if you are using gpm. |
| 942 | |
| 943 | config APM_RTC_IS_GMT |
| 944 | bool "RTC stores time in GMT" |
| 945 | depends on APM |
| 946 | help |
| 947 | Say Y here if your RTC (Real Time Clock a.k.a. hardware clock) |
| 948 | stores the time in GMT (Greenwich Mean Time). Say N if your RTC |
| 949 | stores localtime. |
| 950 | |
| 951 | It is in fact recommended to store GMT in your RTC, because then you |
| 952 | don't have to worry about daylight savings time changes. The only |
| 953 | reason not to use GMT in your RTC is if you also run a broken OS |
| 954 | that doesn't understand GMT. |
| 955 | |
| 956 | config APM_ALLOW_INTS |
| 957 | bool "Allow interrupts during APM BIOS calls" |
| 958 | depends on APM |
| 959 | help |
| 960 | Normally we disable external interrupts while we are making calls to |
| 961 | the APM BIOS as a measure to lessen the effects of a badly behaving |
| 962 | BIOS implementation. The BIOS should reenable interrupts if it |
| 963 | needs to. Unfortunately, some BIOSes do not -- especially those in |
| 964 | many of the newer IBM Thinkpads. If you experience hangs when you |
| 965 | suspend, try setting this to Y. Otherwise, say N. |
| 966 | |
| 967 | config APM_REAL_MODE_POWER_OFF |
| 968 | bool "Use real mode APM BIOS call to power off" |
| 969 | depends on APM |
| 970 | help |
| 971 | Use real mode APM BIOS calls to switch off the computer. This is |
| 972 | a work-around for a number of buggy BIOSes. Switch this option on if |
| 973 | your computer crashes instead of powering off properly. |
| 974 | |
| 975 | endmenu |
| 976 | |
| 977 | source "arch/i386/kernel/cpu/cpufreq/Kconfig" |
| 978 | |
| 979 | endmenu |
| 980 | |
| 981 | menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)" |
| 982 | |
| 983 | config PCI |
| 984 | bool "PCI support" if !X86_VISWS |
| 985 | depends on !X86_VOYAGER |
| 986 | default y if X86_VISWS |
| 987 | help |
| 988 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 989 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 990 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 991 | VESA. If you have PCI, say Y, otherwise N. |
| 992 | |
| 993 | The PCI-HOWTO, available from |
| 994 | <http://www.tldp.org/docs.html#howto>, contains valuable |
| 995 | information about which PCI hardware does work under Linux and which |
| 996 | doesn't. |
| 997 | |
| 998 | choice |
| 999 | prompt "PCI access mode" |
| 1000 | depends on PCI && !X86_VISWS |
| 1001 | default PCI_GOANY |
| 1002 | ---help--- |
| 1003 | On PCI systems, the BIOS can be used to detect the PCI devices and |
| 1004 | determine their configuration. However, some old PCI motherboards |
| 1005 | have BIOS bugs and may crash if this is done. Also, some embedded |
| 1006 | PCI-based systems don't have any BIOS at all. Linux can also try to |
| 1007 | detect the PCI hardware directly without using the BIOS. |
| 1008 | |
| 1009 | With this option, you can specify how Linux should detect the |
| 1010 | PCI devices. If you choose "BIOS", the BIOS will be used, |
| 1011 | if you choose "Direct", the BIOS won't be used, and if you |
| 1012 | choose "MMConfig", then PCI Express MMCONFIG will be used. |
| 1013 | If you choose "Any", the kernel will try MMCONFIG, then the |
| 1014 | direct access method and falls back to the BIOS if that doesn't |
| 1015 | work. If unsure, go with the default, which is "Any". |
| 1016 | |
| 1017 | config PCI_GOBIOS |
| 1018 | bool "BIOS" |
| 1019 | |
| 1020 | config PCI_GOMMCONFIG |
| 1021 | bool "MMConfig" |
| 1022 | |
| 1023 | config PCI_GODIRECT |
| 1024 | bool "Direct" |
| 1025 | |
| 1026 | config PCI_GOANY |
| 1027 | bool "Any" |
| 1028 | |
| 1029 | endchoice |
| 1030 | |
| 1031 | config PCI_BIOS |
| 1032 | bool |
| 1033 | depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY) |
| 1034 | default y |
| 1035 | |
| 1036 | config PCI_DIRECT |
| 1037 | bool |
| 1038 | depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS) |
| 1039 | default y |
| 1040 | |
| 1041 | config PCI_MMCONFIG |
| 1042 | bool |
Alexander Nyberg | 8aadff7 | 2005-05-27 12:48:50 +0200 | [diff] [blame] | 1043 | depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | default y |
| 1045 | |
| 1046 | source "drivers/pci/pcie/Kconfig" |
| 1047 | |
| 1048 | source "drivers/pci/Kconfig" |
| 1049 | |
Al Viro | 5cae841 | 2005-05-04 05:39:22 +0100 | [diff] [blame] | 1050 | config ISA_DMA_API |
| 1051 | bool |
| 1052 | default y |
| 1053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | config ISA |
| 1055 | bool "ISA support" |
| 1056 | depends on !(X86_VOYAGER || X86_VISWS) |
| 1057 | help |
| 1058 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 1059 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 1060 | inside your box. Other bus systems are PCI, EISA, MicroChannel |
| 1061 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; |
| 1062 | newer boards don't support it. If you have ISA, say Y, otherwise N. |
| 1063 | |
| 1064 | config EISA |
| 1065 | bool "EISA support" |
| 1066 | depends on ISA |
| 1067 | ---help--- |
| 1068 | The Extended Industry Standard Architecture (EISA) bus was |
| 1069 | developed as an open alternative to the IBM MicroChannel bus. |
| 1070 | |
| 1071 | The EISA bus provided some of the features of the IBM MicroChannel |
| 1072 | bus while maintaining backward compatibility with cards made for |
| 1073 | the older ISA bus. The EISA bus saw limited use between 1988 and |
| 1074 | 1995 when it was made obsolete by the PCI bus. |
| 1075 | |
| 1076 | Say Y here if you are building a kernel for an EISA-based machine. |
| 1077 | |
| 1078 | Otherwise, say N. |
| 1079 | |
| 1080 | source "drivers/eisa/Kconfig" |
| 1081 | |
| 1082 | config MCA |
| 1083 | bool "MCA support" if !(X86_VISWS || X86_VOYAGER) |
| 1084 | default y if X86_VOYAGER |
| 1085 | help |
| 1086 | MicroChannel Architecture is found in some IBM PS/2 machines and |
| 1087 | laptops. It is a bus system similar to PCI or ISA. See |
| 1088 | <file:Documentation/mca.txt> (and especially the web page given |
| 1089 | there) before attempting to build an MCA bus kernel. |
| 1090 | |
| 1091 | source "drivers/mca/Kconfig" |
| 1092 | |
| 1093 | config SCx200 |
| 1094 | tristate "NatSemi SCx200 support" |
| 1095 | depends on !X86_VOYAGER |
| 1096 | help |
Jim Cromie | 6ae7440 | 2006-06-26 00:25:19 -0700 | [diff] [blame] | 1097 | This provides basic support for National Semiconductor's |
| 1098 | (now AMD's) Geode processors. The driver probes for the |
| 1099 | PCI-IDs of several on-chip devices, so its a good dependency |
| 1100 | for other scx200_* drivers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Jim Cromie | 6ae7440 | 2006-06-26 00:25:19 -0700 | [diff] [blame] | 1102 | If compiled as a module, the driver is named scx200. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Jim Cromie | 6ae7440 | 2006-06-26 00:25:19 -0700 | [diff] [blame] | 1104 | config SCx200HR_TIMER |
| 1105 | tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" |
| 1106 | depends on SCx200 && GENERIC_TIME |
| 1107 | default y |
| 1108 | help |
| 1109 | This driver provides a clocksource built upon the on-chip |
| 1110 | 27MHz high-resolution timer. Its also a workaround for |
| 1111 | NSC Geode SC-1100's buggy TSC, which loses time when the |
| 1112 | processor goes idle (as is done by the scheduler). The |
| 1113 | other workaround is idle=poll boot option. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
Andi Kleen | a32073b | 2006-06-26 13:56:40 +0200 | [diff] [blame] | 1115 | config K8_NB |
| 1116 | def_bool y |
| 1117 | depends on AGP_AMD64 |
| 1118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | source "drivers/pcmcia/Kconfig" |
| 1120 | |
| 1121 | source "drivers/pci/hotplug/Kconfig" |
| 1122 | |
| 1123 | endmenu |
| 1124 | |
| 1125 | menu "Executable file formats" |
| 1126 | |
| 1127 | source "fs/Kconfig.binfmt" |
| 1128 | |
| 1129 | endmenu |
| 1130 | |
Sam Ravnborg | d5950b4 | 2005-07-11 21:03:49 -0700 | [diff] [blame] | 1131 | source "net/Kconfig" |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | source "drivers/Kconfig" |
| 1134 | |
| 1135 | source "fs/Kconfig" |
| 1136 | |
Prasanna S Panchamukhi | cd6b076 | 2005-11-07 00:59:14 -0800 | [diff] [blame] | 1137 | menu "Instrumentation Support" |
| 1138 | depends on EXPERIMENTAL |
| 1139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | source "arch/i386/oprofile/Kconfig" |
| 1141 | |
Prasanna S Panchamukhi | cd6b076 | 2005-11-07 00:59:14 -0800 | [diff] [blame] | 1142 | config KPROBES |
| 1143 | bool "Kprobes (EXPERIMENTAL)" |
Linus Torvalds | add2b6f | 2006-02-26 20:24:40 -0800 | [diff] [blame] | 1144 | depends on EXPERIMENTAL && MODULES |
Prasanna S Panchamukhi | cd6b076 | 2005-11-07 00:59:14 -0800 | [diff] [blame] | 1145 | help |
| 1146 | Kprobes allows you to trap at almost any kernel address and |
| 1147 | execute a callback function. register_kprobe() establishes |
| 1148 | a probepoint and specifies the callback. Kprobes is useful |
| 1149 | for kernel debugging, non-intrusive instrumentation and testing. |
| 1150 | If in doubt, say "N". |
| 1151 | endmenu |
| 1152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | source "arch/i386/Kconfig.debug" |
| 1154 | |
| 1155 | source "security/Kconfig" |
| 1156 | |
| 1157 | source "crypto/Kconfig" |
| 1158 | |
| 1159 | source "lib/Kconfig" |
| 1160 | |
| 1161 | # |
| 1162 | # Use the generic interrupt handling code in kernel/irq/: |
| 1163 | # |
| 1164 | config GENERIC_HARDIRQS |
| 1165 | bool |
| 1166 | default y |
| 1167 | |
| 1168 | config GENERIC_IRQ_PROBE |
| 1169 | bool |
| 1170 | default y |
| 1171 | |
Ashok Raj | 54d5d42 | 2005-09-06 15:16:15 -0700 | [diff] [blame] | 1172 | config GENERIC_PENDING_IRQ |
| 1173 | bool |
| 1174 | depends on GENERIC_HARDIRQS && SMP |
| 1175 | default y |
| 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | config X86_SMP |
| 1178 | bool |
| 1179 | depends on SMP && !X86_VOYAGER |
| 1180 | default y |
| 1181 | |
| 1182 | config X86_HT |
| 1183 | bool |
| 1184 | depends on SMP && !(X86_VISWS || X86_VOYAGER) |
| 1185 | default y |
| 1186 | |
| 1187 | config X86_BIOS_REBOOT |
| 1188 | bool |
| 1189 | depends on !(X86_VISWS || X86_VOYAGER) |
| 1190 | default y |
| 1191 | |
| 1192 | config X86_TRAMPOLINE |
| 1193 | bool |
| 1194 | depends on X86_SMP || (X86_VOYAGER && SMP) |
| 1195 | default y |
Thomas Gleixner | 97fc79f | 2006-01-09 20:52:31 -0800 | [diff] [blame] | 1196 | |
| 1197 | config KTIME_SCALAR |
| 1198 | bool |
| 1199 | default y |