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 | # Note: ISA is disabled and will hopefully never be enabled. |
| 6 | # If you managed to buy an ISA x86-64 box you'll have to fix all the |
| 7 | # ISA drivers you need yourself. |
| 8 | # |
| 9 | |
| 10 | mainmenu "Linux Kernel Configuration" |
| 11 | |
| 12 | config X86_64 |
| 13 | bool |
| 14 | default y |
| 15 | help |
| 16 | Port to the x86-64 architecture. x86-64 is a 64-bit extension to the |
| 17 | classical 32-bit x86 architecture. For details see |
| 18 | <http://www.x86-64.org/>. |
| 19 | |
| 20 | config 64BIT |
| 21 | def_bool y |
| 22 | |
| 23 | config X86 |
| 24 | bool |
| 25 | default y |
| 26 | |
| 27 | config MMU |
| 28 | bool |
| 29 | default y |
| 30 | |
| 31 | config ISA |
| 32 | bool |
| 33 | |
| 34 | config SBUS |
| 35 | bool |
| 36 | |
| 37 | config RWSEM_GENERIC_SPINLOCK |
| 38 | bool |
| 39 | default y |
| 40 | |
| 41 | config RWSEM_XCHGADD_ALGORITHM |
| 42 | bool |
| 43 | |
| 44 | config GENERIC_CALIBRATE_DELAY |
| 45 | bool |
| 46 | default y |
| 47 | |
| 48 | config X86_CMPXCHG |
| 49 | bool |
| 50 | default y |
| 51 | |
| 52 | config EARLY_PRINTK |
| 53 | bool |
| 54 | default y |
| 55 | |
| 56 | config GENERIC_ISA_DMA |
| 57 | bool |
| 58 | default y |
| 59 | |
| 60 | config GENERIC_IOMAP |
| 61 | bool |
| 62 | default y |
| 63 | |
| 64 | source "init/Kconfig" |
| 65 | |
| 66 | |
| 67 | menu "Processor type and features" |
| 68 | |
| 69 | choice |
| 70 | prompt "Processor family" |
| 71 | default MK8 |
| 72 | |
| 73 | config MK8 |
| 74 | bool "AMD-Opteron/Athlon64" |
| 75 | help |
| 76 | Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs. |
| 77 | |
| 78 | config MPSC |
| 79 | bool "Intel EM64T" |
| 80 | help |
| 81 | Optimize for Intel Pentium 4 and Xeon CPUs with Intel |
| 82 | Extended Memory 64 Technology(EM64T). For details see |
| 83 | <http://www.intel.com/technology/64bitextensions/>. |
| 84 | |
| 85 | config GENERIC_CPU |
| 86 | bool "Generic-x86-64" |
| 87 | help |
| 88 | Generic x86-64 CPU. |
| 89 | |
| 90 | endchoice |
| 91 | |
| 92 | # |
| 93 | # Define implied options from the CPU selection here |
| 94 | # |
| 95 | config X86_L1_CACHE_BYTES |
| 96 | int |
| 97 | default "128" if GENERIC_CPU || MPSC |
| 98 | default "64" if MK8 |
| 99 | |
| 100 | config X86_L1_CACHE_SHIFT |
| 101 | int |
| 102 | default "7" if GENERIC_CPU || MPSC |
| 103 | default "6" if MK8 |
| 104 | |
| 105 | config X86_TSC |
| 106 | bool |
| 107 | default y |
| 108 | |
| 109 | config X86_GOOD_APIC |
| 110 | bool |
| 111 | default y |
| 112 | |
| 113 | config MICROCODE |
| 114 | tristate "/dev/cpu/microcode - Intel CPU microcode support" |
| 115 | ---help--- |
| 116 | If you say Y here the 'File systems' section, you will be |
| 117 | able to update the microcode on Intel processors. You will |
| 118 | obviously need the actual microcode binary data itself which is |
| 119 | not shipped with the Linux kernel. |
| 120 | |
| 121 | For latest news and information on obtaining all the required |
| 122 | ingredients for this driver, check: |
| 123 | <http://www.urbanmyth.org/microcode/>. |
| 124 | |
| 125 | To compile this driver as a module, choose M here: the |
| 126 | module will be called microcode. |
| 127 | If you use modprobe or kmod you may also want to add the line |
| 128 | 'alias char-major-10-184 microcode' to your /etc/modules.conf file. |
| 129 | |
| 130 | config X86_MSR |
| 131 | tristate "/dev/cpu/*/msr - Model-specific register support" |
| 132 | help |
| 133 | This device gives privileged processes access to the x86 |
| 134 | Model-Specific Registers (MSRs). It is a character device with |
| 135 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. |
| 136 | MSR accesses are directed to a specific CPU on multi-processor |
| 137 | systems. |
| 138 | |
| 139 | config X86_CPUID |
| 140 | tristate "/dev/cpu/*/cpuid - CPU information support" |
| 141 | help |
| 142 | This device gives processes access to the x86 CPUID instruction to |
| 143 | be executed on a specific processor. It is a character device |
| 144 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to |
| 145 | /dev/cpu/31/cpuid. |
| 146 | |
| 147 | # disable it for opteron optimized builds because it pulls in ACPI_BOOT |
| 148 | config X86_HT |
| 149 | bool |
| 150 | depends on SMP && !MK8 |
| 151 | default y |
| 152 | |
| 153 | config MATH_EMULATION |
| 154 | bool |
| 155 | |
| 156 | config MCA |
| 157 | bool |
| 158 | |
| 159 | config EISA |
| 160 | bool |
| 161 | |
| 162 | config X86_IO_APIC |
| 163 | bool |
| 164 | default y |
| 165 | |
| 166 | config X86_LOCAL_APIC |
| 167 | bool |
| 168 | default y |
| 169 | |
| 170 | config MTRR |
| 171 | bool "MTRR (Memory Type Range Register) support" |
| 172 | ---help--- |
| 173 | On Intel P6 family processors (Pentium Pro, Pentium II and later) |
| 174 | the Memory Type Range Registers (MTRRs) may be used to control |
| 175 | processor access to memory ranges. This is most useful if you have |
| 176 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining |
| 177 | allows bus write transfers to be combined into a larger transfer |
| 178 | before bursting over the PCI/AGP bus. This can increase performance |
| 179 | of image write operations 2.5 times or more. Saying Y here creates a |
| 180 | /proc/mtrr file which may be used to manipulate your processor's |
| 181 | MTRRs. Typically the X server should use this. |
| 182 | |
| 183 | This code has a reasonably generic interface so that similar |
| 184 | control registers on other processors can be easily supported |
| 185 | as well. |
| 186 | |
| 187 | Saying Y here also fixes a problem with buggy SMP BIOSes which only |
| 188 | set the MTRRs for the boot CPU and not for the secondary CPUs. This |
| 189 | can lead to all sorts of problems, so it's good to say Y here. |
| 190 | |
| 191 | Just say Y here, all x86-64 machines support MTRRs. |
| 192 | |
| 193 | See <file:Documentation/mtrr.txt> for more information. |
| 194 | |
| 195 | config SMP |
| 196 | bool "Symmetric multi-processing support" |
| 197 | ---help--- |
| 198 | This enables support for systems with more than one CPU. If you have |
| 199 | a system with only one CPU, like most personal computers, say N. If |
| 200 | you have a system with more than one CPU, say Y. |
| 201 | |
| 202 | If you say N here, the kernel will run on single and multiprocessor |
| 203 | machines, but will use only one CPU of a multiprocessor machine. If |
| 204 | you say Y here, the kernel will run on many, but not all, |
| 205 | singleprocessor machines. On a singleprocessor machine, the kernel |
| 206 | will run faster if you say N here. |
| 207 | |
| 208 | If you don't know what to do here, say N. |
| 209 | |
| 210 | config PREEMPT |
| 211 | bool "Preemptible Kernel" |
| 212 | ---help--- |
| 213 | This option reduces the latency of the kernel when reacting to |
| 214 | real-time or interactive events by allowing a low priority process to |
| 215 | be preempted even if it is in kernel mode executing a system call. |
| 216 | This allows applications to run more reliably even when the system is |
| 217 | under load. On contrary it may also break your drivers and add |
| 218 | priority inheritance problems to your system. Don't select it if |
| 219 | you rely on a stable system or have slightly obscure hardware. |
| 220 | It's also not very well tested on x86-64 currently. |
| 221 | You have been warned. |
| 222 | |
| 223 | Say Y here if you are feeling brave and building a kernel for a |
| 224 | desktop, embedded or real-time system. Say N if you are unsure. |
| 225 | |
| 226 | config PREEMPT_BKL |
| 227 | bool "Preempt The Big Kernel Lock" |
| 228 | depends on PREEMPT |
| 229 | default y |
| 230 | help |
| 231 | This option reduces the latency of the kernel by making the |
| 232 | big kernel lock preemptible. |
| 233 | |
| 234 | Say Y here if you are building a kernel for a desktop system. |
| 235 | Say N if you are unsure. |
| 236 | |
| 237 | config SCHED_SMT |
| 238 | bool "SMT (Hyperthreading) scheduler support" |
| 239 | depends on SMP |
| 240 | default n |
| 241 | help |
| 242 | SMT scheduler support improves the CPU scheduler's decision making |
| 243 | when dealing with Intel Pentium 4 chips with HyperThreading at a |
| 244 | cost of slightly increased overhead in some places. If unsure say |
| 245 | N here. |
| 246 | |
| 247 | config K8_NUMA |
| 248 | bool "K8 NUMA support" |
| 249 | select NUMA |
| 250 | depends on SMP |
| 251 | help |
| 252 | Enable NUMA (Non Unified Memory Architecture) support for |
| 253 | AMD Opteron Multiprocessor systems. The kernel will try to allocate |
| 254 | memory used by a CPU on the local memory controller of the CPU |
| 255 | and add some more NUMA awareness to the kernel. |
| 256 | This code is recommended on all multiprocessor Opteron systems |
| 257 | and normally doesn't hurt on others. |
| 258 | |
| 259 | config NUMA_EMU |
| 260 | bool "NUMA emulation support" |
| 261 | select NUMA |
| 262 | depends on SMP |
| 263 | help |
| 264 | Enable NUMA emulation. A flat machine will be split |
| 265 | into virtual nodes when booted with "numa=fake=N", where N is the |
| 266 | number of nodes. This is only useful for debugging. |
| 267 | |
Dave Hansen | 3f22ab2 | 2005-06-23 00:07:43 -0700 | [diff] [blame] | 268 | config ARCH_DISCONTIGMEM_ENABLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | bool |
| 270 | depends on NUMA |
| 271 | default y |
| 272 | |
| 273 | config NUMA |
| 274 | bool |
| 275 | default n |
| 276 | |
Matt Tolentino | 1035faf | 2005-06-23 00:08:05 -0700 | [diff] [blame^] | 277 | config ARCH_DISCONTIGMEM_ENABLE |
| 278 | def_bool y |
| 279 | depends on NUMA |
| 280 | |
| 281 | config ARCH_DISCONTIGMEM_DEFAULT |
| 282 | def_bool y |
| 283 | depends on NUMA |
| 284 | |
| 285 | config ARCH_SPARSEMEM_ENABLE |
| 286 | def_bool y |
| 287 | depends on NUMA |
| 288 | |
| 289 | config ARCH_FLATMEM_ENABLE |
| 290 | def_bool y |
| 291 | depends on !NUMA |
| 292 | |
Dave Hansen | 3f22ab2 | 2005-06-23 00:07:43 -0700 | [diff] [blame] | 293 | source "mm/Kconfig" |
| 294 | |
Matt Tolentino | 1035faf | 2005-06-23 00:08:05 -0700 | [diff] [blame^] | 295 | config HAVE_ARCH_EARLY_PFN_TO_NID |
| 296 | def_bool y |
| 297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | config HAVE_DEC_LOCK |
| 299 | bool |
| 300 | depends on SMP |
| 301 | default y |
| 302 | |
| 303 | config NR_CPUS |
| 304 | int "Maximum number of CPUs (2-256)" |
| 305 | range 2 256 |
| 306 | depends on SMP |
| 307 | default "8" |
| 308 | help |
| 309 | This allows you to specify the maximum number of CPUs which this |
| 310 | kernel will support. Current maximum is 256 CPUs due to |
| 311 | APIC addressing limits. Less depending on the hardware. |
| 312 | |
| 313 | This is purely to save memory - each supported CPU requires |
| 314 | memory in the static kernel configuration. |
| 315 | |
| 316 | config HPET_TIMER |
| 317 | bool |
| 318 | default y |
| 319 | help |
| 320 | Use the IA-PC HPET (High Precision Event Timer) to manage |
| 321 | time in preference to the PIT and RTC, if a HPET is |
| 322 | present. The HPET provides a stable time base on SMP |
| 323 | systems, unlike the TSC, but it is more expensive to access, |
| 324 | as it is off-chip. You can find the HPET spec at |
| 325 | <http://www.intel.com/labs/platcomp/hpet/hpetspec.htm>. |
| 326 | |
Andi Kleen | 312df5f | 2005-05-16 21:53:28 -0700 | [diff] [blame] | 327 | config X86_PM_TIMER |
| 328 | bool "PM timer" |
Andi Kleen | 9c2be6a | 2005-05-31 14:39:26 -0700 | [diff] [blame] | 329 | depends on ACPI |
Andi Kleen | 312df5f | 2005-05-16 21:53:28 -0700 | [diff] [blame] | 330 | default y |
| 331 | help |
| 332 | Support the ACPI PM timer for time keeping. This is slow, |
| 333 | but is useful on some chipsets without HPET on systems with more |
| 334 | than one CPU. On a single processor or single socket multi core |
| 335 | system it is normally not required. |
| 336 | When the PM timer is active 64bit vsyscalls are disabled |
| 337 | and should not be enabled (/proc/sys/kernel/vsyscall64 should |
| 338 | not be changed). |
| 339 | The kernel selects the PM timer only as a last resort, so it is |
| 340 | useful to enable just in case. |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | config HPET_EMULATE_RTC |
| 343 | bool "Provide RTC interrupt" |
| 344 | depends on HPET_TIMER && RTC=y |
| 345 | |
| 346 | config GART_IOMMU |
| 347 | bool "IOMMU support" |
| 348 | depends on PCI |
| 349 | help |
| 350 | Support the K8 IOMMU. Needed to run systems with more than 4GB of memory |
| 351 | properly with 32-bit PCI devices that do not support DAC (Double Address |
| 352 | Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. |
| 353 | Normally the kernel will take the right choice by itself. |
| 354 | If unsure, say Y. |
| 355 | |
| 356 | # need this always enabled with GART_IOMMU for the VIA workaround |
| 357 | config SWIOTLB |
| 358 | bool |
| 359 | depends on GART_IOMMU |
| 360 | default y |
| 361 | |
| 362 | config DUMMY_IOMMU |
| 363 | bool |
| 364 | depends on !GART_IOMMU && !SWIOTLB |
| 365 | default y |
| 366 | help |
| 367 | Don't use IOMMU code. This will cause problems when you have more than 4GB |
| 368 | of memory and any 32-bit devices. Don't turn on unless you know what you |
| 369 | are doing. |
| 370 | |
| 371 | config X86_MCE |
| 372 | bool "Machine check support" if EMBEDDED |
| 373 | default y |
| 374 | help |
| 375 | Include a machine check error handler to report hardware errors. |
| 376 | This version will require the mcelog utility to decode some |
| 377 | machine check error logs. See |
| 378 | ftp://ftp.x86-64.org/pub/linux/tools/mcelog |
| 379 | |
| 380 | config X86_MCE_INTEL |
| 381 | bool "Intel MCE features" |
| 382 | depends on X86_MCE && X86_LOCAL_APIC |
| 383 | default y |
| 384 | help |
| 385 | Additional support for intel specific MCE features such as |
| 386 | the thermal monitor. |
| 387 | |
| 388 | config SECCOMP |
| 389 | bool "Enable seccomp to safely compute untrusted bytecode" |
| 390 | depends on PROC_FS |
| 391 | default y |
| 392 | help |
| 393 | This kernel feature is useful for number crunching applications |
| 394 | that may need to compute untrusted bytecode during their |
| 395 | execution. By using pipes or other transports made available to |
| 396 | the process as file descriptors supporting the read/write |
| 397 | syscalls, it's possible to isolate those applications in |
| 398 | their own address space using seccomp. Once seccomp is |
| 399 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
| 400 | and the task is only allowed to execute a few safe syscalls |
| 401 | defined by each seccomp mode. |
| 402 | |
| 403 | If unsure, say Y. Only embedded should say N here. |
| 404 | |
| 405 | endmenu |
| 406 | |
| 407 | # |
| 408 | # Use the generic interrupt handling code in kernel/irq/: |
| 409 | # |
| 410 | config GENERIC_HARDIRQS |
| 411 | bool |
| 412 | default y |
| 413 | |
| 414 | config GENERIC_IRQ_PROBE |
| 415 | bool |
| 416 | default y |
| 417 | |
Al Viro | 5cae841 | 2005-05-04 05:39:22 +0100 | [diff] [blame] | 418 | # we have no ISA slots, but we do have ISA-style DMA. |
| 419 | config ISA_DMA_API |
| 420 | bool |
| 421 | default y |
| 422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | menu "Power management options" |
| 424 | |
| 425 | source kernel/power/Kconfig |
| 426 | |
| 427 | source "drivers/acpi/Kconfig" |
| 428 | |
| 429 | source "arch/x86_64/kernel/cpufreq/Kconfig" |
| 430 | |
| 431 | endmenu |
| 432 | |
| 433 | menu "Bus options (PCI etc.)" |
| 434 | |
| 435 | config PCI |
| 436 | bool "PCI support" |
| 437 | |
| 438 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. |
| 439 | config PCI_DIRECT |
| 440 | bool |
| 441 | depends on PCI |
| 442 | default y |
| 443 | |
| 444 | config PCI_MMCONFIG |
| 445 | bool "Support mmconfig PCI config space access" |
Alexander Nyberg | 8aadff7 | 2005-05-27 12:48:50 +0200 | [diff] [blame] | 446 | depends on PCI && ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | select ACPI_BOOT |
| 448 | |
| 449 | config UNORDERED_IO |
| 450 | bool "Unordered IO mapping access" |
| 451 | depends on EXPERIMENTAL |
| 452 | help |
| 453 | Use unordered stores to access IO memory mappings in device drivers. |
| 454 | Still very experimental. When a driver works on IA64/ppc64/pa-risc it should |
| 455 | work with this option, but it makes the drivers behave differently |
| 456 | from i386. Requires that the driver writer used memory barriers |
| 457 | properly. |
| 458 | |
| 459 | source "drivers/pci/pcie/Kconfig" |
| 460 | |
| 461 | source "drivers/pci/Kconfig" |
| 462 | |
| 463 | source "drivers/pcmcia/Kconfig" |
| 464 | |
| 465 | source "drivers/pci/hotplug/Kconfig" |
| 466 | |
| 467 | endmenu |
| 468 | |
| 469 | |
| 470 | menu "Executable file formats / Emulations" |
| 471 | |
| 472 | source "fs/Kconfig.binfmt" |
| 473 | |
| 474 | config IA32_EMULATION |
| 475 | bool "IA32 Emulation" |
| 476 | help |
| 477 | Include code to run 32-bit programs under a 64-bit kernel. You should likely |
| 478 | turn this on, unless you're 100% sure that you don't have any 32-bit programs |
| 479 | left. |
| 480 | |
| 481 | config IA32_AOUT |
| 482 | bool "IA32 a.out support" |
| 483 | depends on IA32_EMULATION |
| 484 | help |
| 485 | Support old a.out binaries in the 32bit emulation. |
| 486 | |
| 487 | config COMPAT |
| 488 | bool |
| 489 | depends on IA32_EMULATION |
| 490 | default y |
| 491 | |
| 492 | config SYSVIPC_COMPAT |
| 493 | bool |
| 494 | depends on COMPAT && SYSVIPC |
| 495 | default y |
| 496 | |
| 497 | config UID16 |
| 498 | bool |
| 499 | depends on IA32_EMULATION |
| 500 | default y |
| 501 | |
| 502 | endmenu |
| 503 | |
| 504 | source drivers/Kconfig |
| 505 | |
| 506 | source "drivers/firmware/Kconfig" |
| 507 | |
| 508 | source fs/Kconfig |
| 509 | |
| 510 | source "arch/x86_64/oprofile/Kconfig" |
| 511 | |
| 512 | source "arch/x86_64/Kconfig.debug" |
| 513 | |
| 514 | source "security/Kconfig" |
| 515 | |
| 516 | source "crypto/Kconfig" |
| 517 | |
| 518 | source "lib/Kconfig" |