arch/i386/Kconfig

   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
   8 config X86
   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
  17 config MMU
  18         bool
  19         default y
  20
  21 config SBUS
  22         bool
  23
  24 config UID16
  25         bool
  26         default y
  27
  28 config GENERIC_ISA_DMA
  29         bool
  30         default y
  31
  32 config GENERIC_IOMAP
  33         bool
  34         default y
  35
  36 source "init/Kconfig"
  37
  38 menu "Processor type and features"
  39
  40 choice
  41         prompt "Subarchitecture Type"
  42         default X86_PC
  43
  44 config X86_PC
  45         bool "PC-compatible"
  46         help
  47           Choose this option if your computer is a standard PC or compatible.
  48
  49 config X86_ELAN
  50         bool "AMD Elan"
  51         help
  52           Select this for an AMD Elan processor.
  53
  54           Do not use this option for K6/Athlon/Opteron processors!
  55
  56           If unsure, choose "PC-compatible" instead.
  57
  58 config X86_VOYAGER
  59         bool "Voyager (NCR)"
  60         help
  61           Voyager is an MCA-based 32-way capable SMP architecture proprietary
  62           to NCR Corp.  Machine classes 345x/35xx/4100/51xx are Voyager-based.
  63
  64           *** WARNING ***
  65
  66           If you do not specifically know you have a Voyager based machine,
  67           say N here, otherwise the kernel you build will not be bootable.
  68
  69 config X86_NUMAQ
  70         bool "NUMAQ (IBM/Sequent)"
  71         select DISCONTIGMEM
  72         select NUMA
  73         help
  74           This option is used for getting Linux to run on a (IBM/Sequent) NUMA
  75           multiquad box. This changes the way that processors are bootstrapped,
  76           and uses Clustered Logical APIC addressing mode instead of Flat Logical.
  77           You will need a new lynxer.elf file to flash your firmware with - send
  78           email to <Martin.Bligh@us.ibm.com>.
  79
  80 config X86_SUMMIT
  81         bool "Summit/EXA (IBM x440)"
  82         depends on SMP
  83         help
  84           This option is needed for IBM systems that use the Summit/EXA chipset.
  85           In particular, it is needed for the x440.
  86
  87           If you don't have one of these computers, you should say N here.
  88
  89 config X86_BIGSMP
  90         bool "Support for other sub-arch SMP systems with more than 8 CPUs"
  91         depends on SMP
  92         help
  93           This option is needed for the systems that have more than 8 CPUs
  94           and if the system is not of any sub-arch type above.
  95
  96           If you don't have such a system, you should say N here.
  97
  98 config X86_VISWS
  99         bool "SGI 320/540 (Visual Workstation)"
 100         help
 101           The SGI Visual Workstation series is an IA32-based workstation
 102           based on SGI systems chips with some legacy PC hardware attached.
 103
 104           Say Y here to create a kernel to run on the SGI 320 or 540.
 105
 106           A kernel compiled for the Visual Workstation will not run on PCs
 107           and vice versa. See <file:Documentation/sgi-visws.txt> for details.
 108
 109 config X86_GENERICARCH
 110        bool "Generic architecture (Summit, bigsmp, ES7000, default)"
 111        depends on SMP
 112        help
 113           This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
 114           It is intended for a generic binary kernel.
 115
 116 config X86_ES7000
 117         bool "Support for Unisys ES7000 IA32 series"
 118         depends on SMP
 119         help
 120           Support for Unisys ES7000 systems.  Say 'Y' here if this kernel is
 121           supposed to run on an IA32-based Unisys ES7000 system.
 122           Only choose this option if you have such a system, otherwise you
 123           should say N here.
 124
 125 endchoice
 126
 127 config ACPI_SRAT
 128         bool
 129         default y
 130         depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
 131
 132 config X86_SUMMIT_NUMA
 133         bool
 134         default y
 135         depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
 136
 137 config X86_CYCLONE_TIMER
 138         bool
 139         default y
 140         depends on X86_SUMMIT || X86_GENERICARCH
 141
 142 config ES7000_CLUSTERED_APIC
 143         bool
 144         default y
 145         depends on SMP && X86_ES7000 && MPENTIUMIII
 146
 147 if !X86_ELAN
 148
 149 choice
 150         prompt "Processor family"
 151         default M686
 152
 153 config M386
 154         bool "386"
 155         ---help---
 156           This is the processor type of your CPU. This information is used for
 157           optimizing purposes. In order to compile a kernel that can run on
 158           all x86 CPU types (albeit not optimally fast), you can specify
 159           "386" here.
 160
 161           The kernel will not necessarily run on earlier architectures than
 162           the one you have chosen, e.g. a Pentium optimized kernel will run on
 163           a PPro, but not necessarily on a i486.
 164
 165           Here are the settings recommended for greatest speed:
 166           - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
 167           486DLC/DLC2, UMC 486SX-S and NexGen Nx586.  Only "386" kernels
 168           will run on a 386 class machine.
 169           - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
 170           SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
 171           - "586" for generic Pentium CPUs lacking the TSC
 172           (time stamp counter) register.
 173           - "Pentium-Classic" for the Intel Pentium.
 174           - "Pentium-MMX" for the Intel Pentium MMX.
 175           - "Pentium-Pro" for the Intel Pentium Pro.
 176           - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
 177           - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
 178           - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
 179           - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
 180           - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
 181           - "Crusoe" for the Transmeta Crusoe series.
 182           - "Efficeon" for the Transmeta Efficeon series.
 183           - "Winchip-C6" for original IDT Winchip.
 184           - "Winchip-2" for IDT Winchip 2.
 185           - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
 186           - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
 187           - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
 188           - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
 189
 190           If you don't know what to do, choose "386".
 191
 192 config M486
 193         bool "486"
 194         help
 195           Select this for a 486 series processor, either Intel or one of the
 196           compatible processors from AMD, Cyrix, IBM, or Intel.  Includes DX,
 197           DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
 198           U5S.
 199
 200 config M586
 201         bool "586/K5/5x86/6x86/6x86MX"
 202         help
 203           Select this for an 586 or 686 series processor such as the AMD K5,
 204           the Cyrix 5x86, 6x86 and 6x86MX.  This choice does not
 205           assume the RDTSC (Read Time Stamp Counter) instruction.
 206
 207 config M586TSC
 208         bool "Pentium-Classic"
 209         help
 210           Select this for a Pentium Classic processor with the RDTSC (Read
 211           Time Stamp Counter) instruction for benchmarking.
 212
 213 config M586MMX
 214         bool "Pentium-MMX"
 215         help
 216           Select this for a Pentium with the MMX graphics/multimedia
 217           extended instructions.
 218
 219 config M686
 220         bool "Pentium-Pro"
 221         help
 222           Select this for Intel Pentium Pro chips.  This enables the use of
 223           Pentium Pro extended instructions, and disables the init-time guard
 224           against the f00f bug found in earlier Pentiums.
 225
 226 config MPENTIUMII
 227         bool "Pentium-II/Celeron(pre-Coppermine)"
 228         help
 229           Select this for Intel chips based on the Pentium-II and
 230           pre-Coppermine Celeron core.  This option enables an unaligned
 231           copy optimization, compiles the kernel with optimization flags
 232           tailored for the chip, and applies any applicable Pentium Pro
 233           optimizations.
 234
 235 config MPENTIUMIII
 236         bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
 237         help
 238           Select this for Intel chips based on the Pentium-III and
 239           Celeron-Coppermine core.  This option enables use of some
 240           extended prefetch instructions in addition to the Pentium II
 241           extensions.
 242
 243 config MPENTIUMM
 244         bool "Pentium M"
 245         help
 246           Select this for Intel Pentium M (not Pentium-4 M)
 247           notebook chips.
 248
 249 config MPENTIUM4
 250         bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
 251         help
 252           Select this for Intel Pentium 4 chips.  This includes the
 253           Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
 254           (not Pentium M) chips.  This option enables compile flags
 255           optimized for the chip, uses the correct cache shift, and
 256           applies any applicable Pentium III optimizations.
 257
 258 config MK6
 259         bool "K6/K6-II/K6-III"
 260         help
 261           Select this for an AMD K6-family processor.  Enables use of
 262           some extended instructions, and passes appropriate optimization
 263           flags to GCC.
 264
 265 config MK7
 266         bool "Athlon/Duron/K7"
 267         help
 268           Select this for an AMD Athlon K7-family processor.  Enables use of
 269           some extended instructions, and passes appropriate optimization
 270           flags to GCC.
 271
 272 config MK8
 273         bool "Opteron/Athlon64/Hammer/K8"
 274         help
 275           Select this for an AMD Opteron or Athlon64 Hammer-family processor.  Enables
 276           use of some extended instructions, and passes appropriate optimization
 277           flags to GCC.
 278
 279 config MCRUSOE
 280         bool "Crusoe"
 281         help
 282           Select this for a Transmeta Crusoe processor.  Treats the processor
 283           like a 586 with TSC, and sets some GCC optimization flags (like a
 284           Pentium Pro with no alignment requirements).
 285
 286 config MEFFICEON
 287         bool "Efficeon"
 288         help
 289           Select this for a Transmeta Efficeon processor.
 290
 291 config MWINCHIPC6
 292         bool "Winchip-C6"
 293         help
 294           Select this for an IDT Winchip C6 chip.  Linux and GCC
 295           treat this chip as a 586TSC with some extended instructions
 296           and alignment requirements.
 297
 298 config MWINCHIP2
 299         bool "Winchip-2"
 300         help
 301           Select this for an IDT Winchip-2.  Linux and GCC
 302           treat this chip as a 586TSC with some extended instructions
 303           and alignment requirements.
 304
 305 config MWINCHIP3D
 306         bool "Winchip-2A/Winchip-3"
 307         help
 308           Select this for an IDT Winchip-2A or 3.  Linux and GCC
 309           treat this chip as a 586TSC with some extended instructions
 310           and alignment reqirements.  Also enable out of order memory
 311           stores for this CPU, which can increase performance of some
 312           operations.
 313
 314 config MGEODEGX1
 315         bool "GeodeGX1"
 316         help
 317           Select this for a Geode GX1 (Cyrix MediaGX) chip.
 318
 319 config MCYRIXIII
 320         bool "CyrixIII/VIA-C3"
 321         help
 322           Select this for a Cyrix III or C3 chip.  Presently Linux and GCC
 323           treat this chip as a generic 586. Whilst the CPU is 686 class,
 324           it lacks the cmov extension which gcc assumes is present when
 325           generating 686 code.
 326           Note that Nehemiah (Model 9) and above will not boot with this
 327           kernel due to them lacking the 3DNow! instructions used in earlier
 328           incarnations of the CPU.
 329
 330 config MVIAC3_2
 331         bool "VIA C3-2 (Nehemiah)"
 332         help
 333           Select this for a VIA C3 "Nehemiah". Selecting this enables usage
 334           of SSE and tells gcc to treat the CPU as a 686.
 335           Note, this kernel will not boot on older (pre model 9) C3s.
 336
 337 endchoice
 338
 339 config X86_GENERIC
 340        bool "Generic x86 support"
 341        help
 342           Instead of just including optimizations for the selected
 343           x86 variant (e.g. PII, Crusoe or Athlon), include some more
 344           generic optimizations as well. This will make the kernel
 345           perform better on x86 CPUs other than that selected.
 346
 347           This is really intended for distributors who need more
 348           generic optimizations.
 349
 350 endif
 351
 352 #
 353 # Define implied options from the CPU selection here
 354 #
 355 config X86_CMPXCHG
 356         bool
 357         depends on !M386
 358         default y
 359
 360 config X86_XADD
 361         bool
 362         depends on !M386
 363         default y
 364
 365 config X86_L1_CACHE_SHIFT
 366         int
 367         default "7" if MPENTIUM4 || X86_GENERIC
 368         default "4" if X86_ELAN || M486 || M386
 369         default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODEGX1
 370         default "6" if MK7 || MK8 || MPENTIUMM
 371
 372 config RWSEM_GENERIC_SPINLOCK
 373         bool
 374         depends on M386
 375         default y
 376
 377 config RWSEM_XCHGADD_ALGORITHM
 378         bool
 379         depends on !M386
 380         default y
 381
 382 config GENERIC_CALIBRATE_DELAY
 383         bool
 384         default y
 385
 386 config X86_PPRO_FENCE
 387         bool
 388         depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1
 389         default y
 390
 391 config X86_F00F_BUG
 392         bool
 393         depends on M586MMX || M586TSC || M586 || M486 || M386
 394         default y
 395
 396 config X86_WP_WORKS_OK
 397         bool
 398         depends on !M386
 399         default y
 400
 401 config X86_INVLPG
 402         bool
 403         depends on !M386
 404         default y
 405
 406 config X86_BSWAP
 407         bool
 408         depends on !M386
 409         default y
 410
 411 config X86_POPAD_OK
 412         bool
 413         depends on !M386
 414         default y
 415
 416 config X86_ALIGNMENT_16
 417         bool
 418         depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
 419         default y
 420
 421 config X86_GOOD_APIC
 422         bool
 423         depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON
 424         default y
 425
 426 config X86_INTEL_USERCOPY
 427         bool
 428         depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON
 429         default y
 430
 431 config X86_USE_PPRO_CHECKSUM
 432         bool
 433         depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON
 434         default y
 435
 436 config X86_USE_3DNOW
 437         bool
 438         depends on MCYRIXIII || MK7
 439         default y
 440
 441 config X86_OOSTORE
 442         bool
 443         depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
 444         default y
 445
 446 config HPET_TIMER
 447         bool "HPET Timer Support"
 448         help
 449           This enables the use of the HPET for the kernel's internal timer.
 450           HPET is the next generation timer replacing legacy 8254s.
 451           You can safely choose Y here.  However, HPET will only be
 452           activated if the platform and the BIOS support this feature.
 453           Otherwise the 8254 will be used for timing services.
 454
 455           Choose N to continue using the legacy 8254 timer.
 456
 457 config HPET_EMULATE_RTC
 458         bool "Provide RTC interrupt"
 459         depends on HPET_TIMER && RTC=y
 460
 461 config SMP
 462         bool "Symmetric multi-processing support"
 463         ---help---
 464           This enables support for systems with more than one CPU. If you have
 465           a system with only one CPU, like most personal computers, say N. If
 466           you have a system with more than one CPU, say Y.
 467
 468           If you say N here, the kernel will run on single and multiprocessor
 469           machines, but will use only one CPU of a multiprocessor machine. If
 470           you say Y here, the kernel will run on many, but not all,
 471           singleprocessor machines. On a singleprocessor machine, the kernel
 472           will run faster if you say N here.
 473
 474           Note that if you say Y here and choose architecture "586" or
 475           "Pentium" under "Processor family", the kernel will not work on 486
 476           architectures. Similarly, multiprocessor kernels for the "PPro"
 477           architecture may not work on all Pentium based boards.
 478
 479           People using multiprocessor machines who say Y here should also say
 480           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 481           Management" code will be disabled if you say Y here.
 482
 483           See also the <file:Documentation/smp.txt>,
 484           <file:Documentation/i386/IO-APIC.txt>,
 485           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 486           <http://www.tldp.org/docs.html#howto>.
 487
 488           If you don't know what to do here, say N.
 489
 490 config NR_CPUS
 491         int "Maximum number of CPUs (2-255)"
 492         range 2 255
 493         depends on SMP
 494         default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
 495         default "8"
 496         help
 497           This allows you to specify the maximum number of CPUs which this
 498           kernel will support.  The maximum supported value is 255 and the
 499           minimum value which makes sense is 2.
 500
 501           This is purely to save memory - each supported CPU adds
 502           approximately eight kilobytes to the kernel image.
 503
 504 config SCHED_SMT
 505         bool "SMT (Hyperthreading) scheduler support"
 506         depends on SMP
 507         default off
 508         help
 509           SMT scheduler support improves the CPU scheduler's decision making
 510           when dealing with Intel Pentium 4 chips with HyperThreading at a
 511           cost of slightly increased overhead in some places. If unsure say
 512           N here.
 513
 514 config PREEMPT
 515         bool "Preemptible Kernel"
 516         help
 517           This option reduces the latency of the kernel when reacting to
 518           real-time or interactive events by allowing a low priority process to
 519           be preempted even if it is in kernel mode executing a system call.
 520           This allows applications to run more reliably even when the system is
 521           under load.
 522
 523           Say Y here if you are building a kernel for a desktop, embedded
 524           or real-time system.  Say N if you are unsure.
 525
 526 config PREEMPT_BKL
 527         bool "Preempt The Big Kernel Lock"
 528         depends on PREEMPT
 529         default y
 530         help
 531           This option reduces the latency of the kernel by making the
 532           big kernel lock preemptible.
 533
 534           Say Y here if you are building a kernel for a desktop system.
 535           Say N if you are unsure.
 536
 537 config X86_UP_APIC
 538         bool "Local APIC support on uniprocessors"
 539         depends on !SMP && !(X86_VISWS || X86_VOYAGER)
 540         help
 541           A local APIC (Advanced Programmable Interrupt Controller) is an
 542           integrated interrupt controller in the CPU. If you have a single-CPU
 543           system which has a processor with a local APIC, you can say Y here to
 544           enable and use it. If you say Y here even though your machine doesn't
 545           have a local APIC, then the kernel will still run with no slowdown at
 546           all. The local APIC supports CPU-generated self-interrupts (timer,
 547           performance counters), and the NMI watchdog which detects hard
 548           lockups.
 549
 550 config X86_UP_IOAPIC
 551         bool "IO-APIC support on uniprocessors"
 552         depends on X86_UP_APIC
 553         help
 554           An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
 555           SMP-capable replacement for PC-style interrupt controllers. Most
 556           SMP systems and many recent uniprocessor systems have one.
 557
 558           If you have a single-CPU system with an IO-APIC, you can say Y here
 559           to use it. If you say Y here even though your machine doesn't have
 560           an IO-APIC, then the kernel will still run with no slowdown at all.
 561
 562 config X86_LOCAL_APIC
 563         bool
 564         depends on X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER)
 565         default y
 566
 567 config X86_IO_APIC
 568         bool
 569         depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER))
 570         default y
 571
 572 config X86_VISWS_APIC
 573         bool
 574         depends on X86_VISWS
 575         default y
 576
 577 config X86_TSC
 578         bool
 579         depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1) && !X86_NUMAQ
 580         default y
 581
 582 config X86_MCE
 583         bool "Machine Check Exception"
 584         depends on !X86_VOYAGER
 585         ---help---
 586           Machine Check Exception support allows the processor to notify the
 587           kernel if it detects a problem (e.g. overheating, component failure).
 588           The action the kernel takes depends on the severity of the problem,
 589           ranging from a warning message on the console, to halting the machine.
 590           Your processor must be a Pentium or newer to support this - check the
 591           flags in /proc/cpuinfo for mce.  Note that some older Pentium systems
 592           have a design flaw which leads to false MCE events - hence MCE is
 593           disabled on all P5 processors, unless explicitly enabled with "mce"
 594           as a boot argument.  Similarly, if MCE is built in and creates a
 595           problem on some new non-standard machine, you can boot with "nomce"
 596           to disable it.  MCE support simply ignores non-MCE processors like
 597           the 386 and 486, so nearly everyone can say Y here.
 598
 599 config X86_MCE_NONFATAL
 600         tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
 601         depends on X86_MCE
 602         help
 603           Enabling this feature starts a timer that triggers every 5 seconds which
 604           will look at the machine check registers to see if anything happened.
 605           Non-fatal problems automatically get corrected (but still logged).
 606           Disable this if you don't want to see these messages.
 607           Seeing the messages this option prints out may be indicative of dying hardware,
 608           or out-of-spec (ie, overclocked) hardware.
 609           This option only does something on certain CPUs.
 610           (AMD Athlon/Duron and Intel Pentium 4)
 611
 612 config X86_MCE_P4THERMAL
 613         bool "check for P4 thermal throttling interrupt."
 614         depends on X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
 615         help
 616           Enabling this feature will cause a message to be printed when the P4
 617           enters thermal throttling.
 618
 619 config TOSHIBA
 620         tristate "Toshiba Laptop support"
 621         ---help---
 622           This adds a driver to safely access the System Management Mode of
 623           the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
 624           not work on models with a Phoenix BIOS. The System Management Mode
 625           is used to set the BIOS and power saving options on Toshiba portables.
 626
 627           For information on utilities to make use of this driver see the
 628           Toshiba Linux utilities web site at:
 629           <http://www.buzzard.org.uk/toshiba/>.
 630
 631           Say Y if you intend to run this kernel on a Toshiba portable.
 632           Say N otherwise.
 633
 634 config I8K
 635         tristate "Dell laptop support"
 636         ---help---
 637           This adds a driver to safely access the System Management Mode
 638           of the CPU on the Dell Inspiron 8000. The System Management Mode
 639           is used to read cpu temperature and cooling fan status and to
 640           control the fans on the I8K portables.
 641
 642           This driver has been tested only on the Inspiron 8000 but it may
 643           also work with other Dell laptops. You can force loading on other
 644           models by passing the parameter `force=1' to the module. Use at
 645           your own risk.
 646
 647           For information on utilities to make use of this driver see the
 648           I8K Linux utilities web site at:
 649           <http://people.debian.org/~dz/i8k/>
 650
 651           Say Y if you intend to run this kernel on a Dell Inspiron 8000.
 652           Say N otherwise.
 653
 654 config X86_REBOOTFIXUPS
 655         bool "Enable X86 board specific fixups for reboot"
 656         depends on X86
 657         default n
 658         ---help---
 659           This enables chipset and/or board specific fixups to be done
 660           in order to get reboot to work correctly. This is only needed on
 661           some combinations of hardware and BIOS. The symptom, for which
 662           this config is intended, is when reboot ends with a stalled/hung
 663           system.
 664
 665           Currently, the only fixup is for the Geode GX1/CS5530A/TROM2.1.
 666           combination.
 667
 668           Say Y if you want to enable the fixup. Currently, it's safe to
 669           enable this option even if you don't need it.
 670           Say N otherwise.
 671
 672 config MICROCODE
 673         tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
 674         ---help---
 675           If you say Y here and also to "/dev file system support" in the
 676           'File systems' section, you will be able to update the microcode on
 677           Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
 678           Pentium III, Pentium 4, Xeon etc.  You will obviously need the
 679           actual microcode binary data itself which is not shipped with the
 680           Linux kernel.
 681
 682           For latest news and information on obtaining all the required
 683           ingredients for this driver, check:
 684           <http://www.urbanmyth.org/microcode/>.
 685
 686           To compile this driver as a module, choose M here: the
 687           module will be called microcode.
 688
 689 config X86_MSR
 690         tristate "/dev/cpu/*/msr - Model-specific register support"
 691         help
 692           This device gives privileged processes access to the x86
 693           Model-Specific Registers (MSRs).  It is a character device with
 694           major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
 695           MSR accesses are directed to a specific CPU on multi-processor
 696           systems.
 697
 698 config X86_CPUID
 699         tristate "/dev/cpu/*/cpuid - CPU information support"
 700         help
 701           This device gives processes access to the x86 CPUID instruction to
 702           be executed on a specific processor.  It is a character device
 703           with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
 704           /dev/cpu/31/cpuid.
 705
 706 source "drivers/firmware/Kconfig"
 707
 708 choice
 709         prompt "High Memory Support"
 710         default NOHIGHMEM
 711
 712 config NOHIGHMEM
 713         bool "off"
 714         ---help---
 715           Linux can use up to 64 Gigabytes of physical memory on x86 systems.
 716           However, the address space of 32-bit x86 processors is only 4
 717           Gigabytes large. That means that, if you have a large amount of
 718           physical memory, not all of it can be "permanently mapped" by the
 719           kernel. The physical memory that's not permanently mapped is called
 720           "high memory".
 721
 722           If you are compiling a kernel which will never run on a machine with
 723           more than 1 Gigabyte total physical RAM, answer "off" here (default
 724           choice and suitable for most users). This will result in a "3GB/1GB"
 725           split: 3GB are mapped so that each process sees a 3GB virtual memory
 726           space and the remaining part of the 4GB virtual memory space is used
 727           by the kernel to permanently map as much physical memory as
 728           possible.
 729
 730           If the machine has between 1 and 4 Gigabytes physical RAM, then
 731           answer "4GB" here.
 732
 733           If more than 4 Gigabytes is used then answer "64GB" here. This
 734           selection turns Intel PAE (Physical Address Extension) mode on.
 735           PAE implements 3-level paging on IA32 processors. PAE is fully
 736           supported by Linux, PAE mode is implemented on all recent Intel
 737           processors (Pentium Pro and better). NOTE: If you say "64GB" here,
 738           then the kernel will not boot on CPUs that don't support PAE!
 739
 740           The actual amount of total physical memory will either be
 741           auto detected or can be forced by using a kernel command line option
 742           such as "mem=256M". (Try "man bootparam" or see the documentation of
 743           your boot loader (lilo or loadlin) about how to pass options to the
 744           kernel at boot time.)
 745
 746           If unsure, say "off".
 747
 748 config HIGHMEM4G
 749         bool "4GB"
 750         help
 751           Select this if you have a 32-bit processor and between 1 and 4
 752           gigabytes of physical RAM.
 753
 754 config HIGHMEM64G
 755         bool "64GB"
 756         help
 757           Select this if you have a 32-bit processor and more than 4
 758           gigabytes of physical RAM.
 759
 760 endchoice
 761
 762 config HIGHMEM
 763         bool
 764         depends on HIGHMEM64G || HIGHMEM4G
 765         default y
 766
 767 config X86_PAE
 768         bool
 769         depends on HIGHMEM64G
 770         default y
 771
 772 # Common NUMA Features
 773 config NUMA
 774         bool "Numa Memory Allocation and Scheduler Support"
 775         depends on SMP && HIGHMEM64G && (X86_NUMAQ || X86_GENERICARCH || (X86_SUMMIT && ACPI))
 776         default n if X86_PC
 777         default y if (X86_NUMAQ || X86_SUMMIT)
 778
 779 # Need comments to help the hapless user trying to turn on NUMA support
 780 comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support"
 781         depends on X86_NUMAQ && (!HIGHMEM64G || !SMP)
 782
 783 comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
 784         depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
 785
 786 config DISCONTIGMEM
 787         bool
 788         depends on NUMA
 789         default y
 790
 791 config HAVE_ARCH_BOOTMEM_NODE
 792         bool
 793         depends on NUMA
 794         default y
 795
 796 config HAVE_MEMORY_PRESENT
 797         bool
 798         depends on DISCONTIGMEM
 799         default y
 800
 801 config NEED_NODE_MEMMAP_SIZE
 802         bool
 803         depends on DISCONTIGMEM
 804         default y
 805
 806 config HIGHPTE
 807         bool "Allocate 3rd-level pagetables from highmem"
 808         depends on HIGHMEM4G || HIGHMEM64G
 809         help
 810           The VM uses one page table entry for each page of physical memory.
 811           For systems with a lot of RAM, this can be wasteful of precious
 812           low memory.  Setting this option will put user-space page table
 813           entries in high memory.
 814
 815 config MATH_EMULATION
 816         bool "Math emulation"
 817         ---help---
 818           Linux can emulate a math coprocessor (used for floating point
 819           operations) if you don't have one. 486DX and Pentium processors have
 820           a math coprocessor built in, 486SX and 386 do not, unless you added
 821           a 487DX or 387, respectively. (The messages during boot time can
 822           give you some hints here ["man dmesg"].) Everyone needs either a
 823           coprocessor or this emulation.
 824
 825           If you don't have a math coprocessor, you need to say Y here; if you
 826           say Y here even though you have a coprocessor, the coprocessor will
 827           be used nevertheless. (This behavior can be changed with the kernel
 828           command line option "no387", which comes handy if your coprocessor
 829           is broken. Try "man bootparam" or see the documentation of your boot
 830           loader (lilo or loadlin) about how to pass options to the kernel at
 831           boot time.) This means that it is a good idea to say Y here if you
 832           intend to use this kernel on different machines.
 833
 834           More information about the internals of the Linux math coprocessor
 835           emulation can be found in <file:arch/i386/math-emu/README>.
 836
 837           If you are not sure, say Y; apart from resulting in a 66 KB bigger
 838           kernel, it won't hurt.
 839
 840 config MTRR
 841         bool "MTRR (Memory Type Range Register) support"
 842         ---help---
 843           On Intel P6 family processors (Pentium Pro, Pentium II and later)
 844           the Memory Type Range Registers (MTRRs) may be used to control
 845           processor access to memory ranges. This is most useful if you have
 846           a video (VGA) card on a PCI or AGP bus. Enabling write-combining
 847           allows bus write transfers to be combined into a larger transfer
 848           before bursting over the PCI/AGP bus. This can increase performance
 849           of image write operations 2.5 times or more. Saying Y here creates a
 850           /proc/mtrr file which may be used to manipulate your processor's
 851           MTRRs. Typically the X server should use this.
 852
 853           This code has a reasonably generic interface so that similar
 854           control registers on other processors can be easily supported
 855           as well:
 856
 857           The Cyrix 6x86, 6x86MX and M II processors have Address Range
 858           Registers (ARRs) which provide a similar functionality to MTRRs. For
 859           these, the ARRs are used to emulate the MTRRs.
 860           The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
 861           MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
 862           write-combining. All of these processors are supported by this code
 863           and it makes sense to say Y here if you have one of them.
 864
 865           Saying Y here also fixes a problem with buggy SMP BIOSes which only
 866           set the MTRRs for the boot CPU and not for the secondary CPUs. This
 867           can lead to all sorts of problems, so it's good to say Y here.
 868
 869           You can safely say Y even if your machine doesn't have MTRRs, you'll
 870           just add about 9 KB to your kernel.
 871
 872           See <file:Documentation/mtrr.txt> for more information.
 873
 874 config EFI
 875         bool "Boot from EFI support (EXPERIMENTAL)"
 876         depends on ACPI
 877         default n
 878         ---help---
 879         This enables the the kernel to boot on EFI platforms using
 880         system configuration information passed to it from the firmware.
 881         This also enables the kernel to use any EFI runtime services that are
 882         available (such as the EFI variable services).
 883
 884         This option is only useful on systems that have EFI firmware
 885         and will result in a kernel image that is ~8k larger.  In addition,
 886         you must use the latest ELILO loader available at
 887         <http://elilo.sourceforge.net> in order to take advantage of
 888         kernel initialization using EFI information (neither GRUB nor LILO know
 889         anything about EFI).  However, even with this option, the resultant
 890         kernel should continue to boot on existing non-EFI platforms.
 891
 892 config IRQBALANCE
 893         bool "Enable kernel irq balancing"
 894         depends on SMP && X86_IO_APIC
 895         default y
 896         help
 897           The default yes will allow the kernel to do irq load balancing.
 898           Saying no will keep the kernel from doing irq load balancing.
 899
 900 config HAVE_DEC_LOCK
 901         bool
 902         depends on (SMP || PREEMPT) && X86_CMPXCHG
 903         default y
 904
 905 # turning this on wastes a bunch of space.
 906 # Summit needs it only when NUMA is on
 907 config BOOT_IOREMAP
 908         bool
 909         depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
 910         default y
 911
 912 config REGPARM
 913         bool "Use register arguments (EXPERIMENTAL)"
 914         depends on EXPERIMENTAL
 915         default n
 916         help
 917         Compile the kernel with -mregparm=3. This uses a different ABI
 918         and passes the first three arguments of a function call in registers.
 919         This will probably break binary only modules.
 920
 921         This feature is only enabled for gcc-3.0 and later - earlier compilers
 922         generate incorrect output with certain kernel constructs when
 923         -mregparm=3 is used.
 924
 925 config SECCOMP
 926         bool "Enable seccomp to safely compute untrusted bytecode"
 927         depends on PROC_FS
 928         default y
 929         help
 930           This kernel feature is useful for number crunching applications
 931           that may need to compute untrusted bytecode during their
 932           execution. By using pipes or other transports made available to
 933           the process as file descriptors supporting the read/write
 934           syscalls, it's possible to isolate those applications in
 935           their own address space using seccomp. Once seccomp is
 936           enabled via /proc/<pid>/seccomp, it cannot be disabled
 937           and the task is only allowed to execute a few safe syscalls
 938           defined by each seccomp mode.
 939
 940           If unsure, say Y. Only embedded should say N here.
 941
 942 endmenu
 943
 944
 945 menu "Power management options (ACPI, APM)"
 946         depends on !X86_VOYAGER
 947
 948 source kernel/power/Kconfig
 949
 950 source "drivers/acpi/Kconfig"
 951
 952 menu "APM (Advanced Power Management) BIOS Support"
 953 depends on PM && !X86_VISWS
 954
 955 config APM
 956         tristate "APM (Advanced Power Management) BIOS support"
 957         depends on PM
 958         ---help---
 959           APM is a BIOS specification for saving power using several different
 960           techniques. This is mostly useful for battery powered laptops with
 961           APM compliant BIOSes. If you say Y here, the system time will be
 962           reset after a RESUME operation, the /proc/apm device will provide
 963           battery status information, and user-space programs will receive
 964           notification of APM "events" (e.g. battery status change).
 965
 966           If you select "Y" here, you can disable actual use of the APM
 967           BIOS by passing the "apm=off" option to the kernel at boot time.
 968
 969           Note that the APM support is almost completely disabled for
 970           machines with more than one CPU.
 971
 972           In order to use APM, you will need supporting software. For location
 973           and more information, read <file:Documentation/pm.txt> and the
 974           Battery Powered Linux mini-HOWTO, available from
 975           <http://www.tldp.org/docs.html#howto>.
 976
 977           This driver does not spin down disk drives (see the hdparm(8)
 978           manpage ("man 8 hdparm") for that), and it doesn't turn off
 979           VESA-compliant "green" monitors.
 980
 981           This driver does not support the TI 4000M TravelMate and the ACER
 982           486/DX4/75 because they don't have compliant BIOSes. Many "green"
 983           desktop machines also don't have compliant BIOSes, and this driver
 984           may cause those machines to panic during the boot phase.
 985
 986           Generally, if you don't have a battery in your machine, there isn't
 987           much point in using this driver and you should say N. If you get
 988           random kernel OOPSes or reboots that don't seem to be related to
 989           anything, try disabling/enabling this option (or disabling/enabling
 990           APM in your BIOS).
 991
 992           Some other things you should try when experiencing seemingly random,
 993           "weird" problems:
 994
 995           1) make sure that you have enough swap space and that it is
 996           enabled.
 997           2) pass the "no-hlt" option to the kernel
 998           3) switch on floating point emulation in the kernel and pass
 999           the "no387" option to the kernel
1000           4) pass the "floppy=nodma" option to the kernel
1001           5) pass the "mem=4M" option to the kernel (thereby disabling
1002           all but the first 4 MB of RAM)
1003           6) make sure that the CPU is not over clocked.
1004           7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1005           8) disable the cache from your BIOS settings
1006           9) install a fan for the video card or exchange video RAM
1007           10) install a better fan for the CPU
1008           11) exchange RAM chips
1009           12) exchange the motherboard.
1010
1011           To compile this driver as a module, choose M here: the
1012           module will be called apm.
1013
1014 config APM_IGNORE_USER_SUSPEND
1015         bool "Ignore USER SUSPEND"
1016         depends on APM
1017         help
1018           This option will ignore USER SUSPEND requests. On machines with a
1019           compliant APM BIOS, you want to say N. However, on the NEC Versa M
1020           series notebooks, it is necessary to say Y because of a BIOS bug.
1021
1022 config APM_DO_ENABLE
1023         bool "Enable PM at boot time"
1024         depends on APM
1025         ---help---
1026           Enable APM features at boot time. From page 36 of the APM BIOS
1027           specification: "When disabled, the APM BIOS does not automatically
1028           power manage devices, enter the Standby State, enter the Suspend
1029           State, or take power saving steps in response to CPU Idle calls."
1030           This driver will make CPU Idle calls when Linux is idle (unless this
1031           feature is turned off -- see "Do CPU IDLE calls", below). This
1032           should always save battery power, but more complicated APM features
1033           will be dependent on your BIOS implementation. You may need to turn
1034           this option off if your computer hangs at boot time when using APM
1035           support, or if it beeps continuously instead of suspending. Turn
1036           this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1037           T400CDT. This is off by default since most machines do fine without
1038           this feature.
1039
1040 config APM_CPU_IDLE
1041         bool "Make CPU Idle calls when idle"
1042         depends on APM
1043         help
1044           Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1045           On some machines, this can activate improved power savings, such as
1046           a slowed CPU clock rate, when the machine is idle. These idle calls
1047           are made after the idle loop has run for some length of time (e.g.,
1048           333 mS). On some machines, this will cause a hang at boot time or
1049           whenever the CPU becomes idle. (On machines with more than one CPU,
1050           this option does nothing.)
1051
1052 config APM_DISPLAY_BLANK
1053         bool "Enable console blanking using APM"
1054         depends on APM
1055         help
1056           Enable console blanking using the APM. Some laptops can use this to
1057           turn off the LCD backlight when the screen blanker of the Linux
1058           virtual console blanks the screen. Note that this is only used by
1059           the virtual console screen blanker, and won't turn off the backlight
1060           when using the X Window system. This also doesn't have anything to
1061           do with your VESA-compliant power-saving monitor. Further, this
1062           option doesn't work for all laptops -- it might not turn off your
1063           backlight at all, or it might print a lot of errors to the console,
1064           especially if you are using gpm.
1065
1066 config APM_RTC_IS_GMT
1067         bool "RTC stores time in GMT"
1068         depends on APM
1069         help
1070           Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
1071           stores the time in GMT (Greenwich Mean Time). Say N if your RTC
1072           stores localtime.
1073
1074           It is in fact recommended to store GMT in your RTC, because then you
1075           don't have to worry about daylight savings time changes. The only
1076           reason not to use GMT in your RTC is if you also run a broken OS
1077           that doesn't understand GMT.
1078
1079 config APM_ALLOW_INTS
1080         bool "Allow interrupts during APM BIOS calls"
1081         depends on APM
1082         help
1083           Normally we disable external interrupts while we are making calls to
1084           the APM BIOS as a measure to lessen the effects of a badly behaving
1085           BIOS implementation.  The BIOS should reenable interrupts if it
1086           needs to.  Unfortunately, some BIOSes do not -- especially those in
1087           many of the newer IBM Thinkpads.  If you experience hangs when you
1088           suspend, try setting this to Y.  Otherwise, say N.
1089
1090 config APM_REAL_MODE_POWER_OFF
1091         bool "Use real mode APM BIOS call to power off"
1092         depends on APM
1093         help
1094           Use real mode APM BIOS calls to switch off the computer. This is
1095           a work-around for a number of buggy BIOSes. Switch this option on if
1096           your computer crashes instead of powering off properly.
1097
1098 endmenu
1099
1100 source "arch/i386/kernel/cpu/cpufreq/Kconfig"
1101
1102 endmenu
1103
1104 menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
1105
1106 config PCI
1107         bool "PCI support" if !X86_VISWS
1108         depends on !X86_VOYAGER
1109         default y if X86_VISWS
1110         help
1111           Find out whether you have a PCI motherboard. PCI is the name of a
1112           bus system, i.e. the way the CPU talks to the other stuff inside
1113           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1114           VESA. If you have PCI, say Y, otherwise N.
1115
1116           The PCI-HOWTO, available from
1117           <http://www.tldp.org/docs.html#howto>, contains valuable
1118           information about which PCI hardware does work under Linux and which
1119           doesn't.
1120
1121 choice
1122         prompt "PCI access mode"
1123         depends on PCI && !X86_VISWS
1124         default PCI_GOANY
1125         ---help---
1126           On PCI systems, the BIOS can be used to detect the PCI devices and
1127           determine their configuration. However, some old PCI motherboards
1128           have BIOS bugs and may crash if this is done. Also, some embedded
1129           PCI-based systems don't have any BIOS at all. Linux can also try to
1130           detect the PCI hardware directly without using the BIOS.
1131
1132           With this option, you can specify how Linux should detect the
1133           PCI devices. If you choose "BIOS", the BIOS will be used,
1134           if you choose "Direct", the BIOS won't be used, and if you
1135           choose "MMConfig", then PCI Express MMCONFIG will be used.
1136           If you choose "Any", the kernel will try MMCONFIG, then the
1137           direct access method and falls back to the BIOS if that doesn't
1138           work. If unsure, go with the default, which is "Any".
1139
1140 config PCI_GOBIOS
1141         bool "BIOS"
1142
1143 config PCI_GOMMCONFIG
1144         bool "MMConfig"
1145
1146 config PCI_GODIRECT
1147         bool "Direct"
1148
1149 config PCI_GOANY
1150         bool "Any"
1151
1152 endchoice
1153
1154 config PCI_BIOS
1155         bool
1156         depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
1157         default y
1158
1159 config PCI_DIRECT
1160         bool
1161         depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
1162         default y
1163
1164 config PCI_MMCONFIG
1165         bool
1166         depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
1167         select ACPI_BOOT
1168         default y
1169
1170 source "drivers/pci/pcie/Kconfig"
1171
1172 source "drivers/pci/Kconfig"
1173
1174 config ISA_DMA_API
1175         bool
1176         default y
1177
1178 config ISA
1179         bool "ISA support"
1180         depends on !(X86_VOYAGER || X86_VISWS)
1181         help
1182           Find out whether you have ISA slots on your motherboard.  ISA is the
1183           name of a bus system, i.e. the way the CPU talks to the other stuff
1184           inside your box.  Other bus systems are PCI, EISA, MicroChannel
1185           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1186           newer boards don't support it.  If you have ISA, say Y, otherwise N.
1187
1188 config EISA
1189         bool "EISA support"
1190         depends on ISA
1191         ---help---
1192           The Extended Industry Standard Architecture (EISA) bus was
1193           developed as an open alternative to the IBM MicroChannel bus.
1194
1195           The EISA bus provided some of the features of the IBM MicroChannel
1196           bus while maintaining backward compatibility with cards made for
1197           the older ISA bus.  The EISA bus saw limited use between 1988 and
1198           1995 when it was made obsolete by the PCI bus.
1199
1200           Say Y here if you are building a kernel for an EISA-based machine.
1201
1202           Otherwise, say N.
1203
1204 source "drivers/eisa/Kconfig"
1205
1206 config MCA
1207         bool "MCA support" if !(X86_VISWS || X86_VOYAGER)
1208         default y if X86_VOYAGER
1209         help
1210           MicroChannel Architecture is found in some IBM PS/2 machines and
1211           laptops.  It is a bus system similar to PCI or ISA. See
1212           <file:Documentation/mca.txt> (and especially the web page given
1213           there) before attempting to build an MCA bus kernel.
1214
1215 source "drivers/mca/Kconfig"
1216
1217 config SCx200
1218         tristate "NatSemi SCx200 support"
1219         depends on !X86_VOYAGER
1220         help
1221           This provides basic support for the National Semiconductor SCx200
1222           processor.  Right now this is just a driver for the GPIO pins.
1223
1224           If you don't know what to do here, say N.
1225
1226           This support is also available as a module.  If compiled as a
1227           module, it will be called scx200.
1228
1229 source "drivers/pcmcia/Kconfig"
1230
1231 source "drivers/pci/hotplug/Kconfig"
1232
1233 endmenu
1234
1235 menu "Executable file formats"
1236
1237 source "fs/Kconfig.binfmt"
1238
1239 endmenu
1240
1241 source "drivers/Kconfig"
1242
1243 source "fs/Kconfig"
1244
1245 source "arch/i386/oprofile/Kconfig"
1246
1247 source "arch/i386/Kconfig.debug"
1248
1249 source "security/Kconfig"
1250
1251 source "crypto/Kconfig"
1252
1253 source "lib/Kconfig"
1254
1255 #
1256 # Use the generic interrupt handling code in kernel/irq/:
1257 #
1258 config GENERIC_HARDIRQS
1259         bool
1260         default y
1261
1262 config GENERIC_IRQ_PROBE
1263         bool
1264         default y
1265
1266 config X86_SMP
1267         bool
1268         depends on SMP && !X86_VOYAGER
1269         default y
1270
1271 config X86_HT
1272         bool
1273         depends on SMP && !(X86_VISWS || X86_VOYAGER)
1274         default y
1275
1276 config X86_BIOS_REBOOT
1277         bool
1278         depends on !(X86_VISWS || X86_VOYAGER)
1279         default y
1280
1281 config X86_TRAMPOLINE
1282         bool
1283         depends on X86_SMP || (X86_VOYAGER && SMP)
1284         default y
1285
1286 config PC
1287         bool
1288         depends on X86 && !EMBEDDED
1289         default y