1# Put here option for CPU selection and depending optimization 2choice 3 prompt "Processor family" 4 default M686 if X86_32 5 default GENERIC_CPU if X86_64 6 7config M386 8 bool "386" 9 depends on X86_32 && !UML 10 ---help--- 11 This is the processor type of your CPU. This information is used for 12 optimizing purposes. In order to compile a kernel that can run on 13 all x86 CPU types (albeit not optimally fast), you can specify 14 "386" here. 15 16 The kernel will not necessarily run on earlier architectures than 17 the one you have chosen, e.g. a Pentium optimized kernel will run on 18 a PPro, but not necessarily on a i486. 19 20 Here are the settings recommended for greatest speed: 21 - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 22 486DLC/DLC2, and UMC 486SX-S. Only "386" kernels will run on a 386 23 class machine. 24 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or 25 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S. 26 - "586" for generic Pentium CPUs lacking the TSC 27 (time stamp counter) register. 28 - "Pentium-Classic" for the Intel Pentium. 29 - "Pentium-MMX" for the Intel Pentium MMX. 30 - "Pentium-Pro" for the Intel Pentium Pro. 31 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron. 32 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron. 33 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron. 34 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D). 35 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird). 36 - "Crusoe" for the Transmeta Crusoe series. 37 - "Efficeon" for the Transmeta Efficeon series. 38 - "Winchip-C6" for original IDT Winchip. 39 - "Winchip-2" for IDT Winchips with 3dNow! capabilities. 40 - "GeodeGX1" for Geode GX1 (Cyrix MediaGX). 41 - "Geode GX/LX" For AMD Geode GX and LX processors. 42 - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3. 43 - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above). 44 - "VIA C7" for VIA C7. 45 46 If you don't know what to do, choose "386". 47 48config M486 49 bool "486" 50 depends on X86_32 51 ---help--- 52 Select this for a 486 series processor, either Intel or one of the 53 compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX, 54 DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or 55 U5S. 56 57config M586 58 bool "586/K5/5x86/6x86/6x86MX" 59 depends on X86_32 60 ---help--- 61 Select this for an 586 or 686 series processor such as the AMD K5, 62 the Cyrix 5x86, 6x86 and 6x86MX. This choice does not 63 assume the RDTSC (Read Time Stamp Counter) instruction. 64 65config M586TSC 66 bool "Pentium-Classic" 67 depends on X86_32 68 ---help--- 69 Select this for a Pentium Classic processor with the RDTSC (Read 70 Time Stamp Counter) instruction for benchmarking. 71 72config M586MMX 73 bool "Pentium-MMX" 74 depends on X86_32 75 ---help--- 76 Select this for a Pentium with the MMX graphics/multimedia 77 extended instructions. 78 79config M686 80 bool "Pentium-Pro" 81 depends on X86_32 82 ---help--- 83 Select this for Intel Pentium Pro chips. This enables the use of 84 Pentium Pro extended instructions, and disables the init-time guard 85 against the f00f bug found in earlier Pentiums. 86 87config MPENTIUMII 88 bool "Pentium-II/Celeron(pre-Coppermine)" 89 depends on X86_32 90 ---help--- 91 Select this for Intel chips based on the Pentium-II and 92 pre-Coppermine Celeron core. This option enables an unaligned 93 copy optimization, compiles the kernel with optimization flags 94 tailored for the chip, and applies any applicable Pentium Pro 95 optimizations. 96 97config MPENTIUMIII 98 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon" 99 depends on X86_32 100 ---help--- 101 Select this for Intel chips based on the Pentium-III and 102 Celeron-Coppermine core. This option enables use of some 103 extended prefetch instructions in addition to the Pentium II 104 extensions. 105 106config MPENTIUMM 107 bool "Pentium M" 108 depends on X86_32 109 ---help--- 110 Select this for Intel Pentium M (not Pentium-4 M) 111 notebook chips. 112 113config MPENTIUM4 114 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon" 115 depends on X86_32 116 ---help--- 117 Select this for Intel Pentium 4 chips. This includes the 118 Pentium 4, Pentium D, P4-based Celeron and Xeon, and 119 Pentium-4 M (not Pentium M) chips. This option enables compile 120 flags optimized for the chip, uses the correct cache line size, and 121 applies any applicable optimizations. 122 123 CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 ) 124 125 Select this for: 126 Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename: 127 -Willamette 128 -Northwood 129 -Mobile Pentium 4 130 -Mobile Pentium 4 M 131 -Extreme Edition (Gallatin) 132 -Prescott 133 -Prescott 2M 134 -Cedar Mill 135 -Presler 136 -Smithfiled 137 Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename: 138 -Foster 139 -Prestonia 140 -Gallatin 141 -Nocona 142 -Irwindale 143 -Cranford 144 -Potomac 145 -Paxville 146 -Dempsey 147 148 149config MK6 150 bool "K6/K6-II/K6-III" 151 depends on X86_32 152 ---help--- 153 Select this for an AMD K6-family processor. Enables use of 154 some extended instructions, and passes appropriate optimization 155 flags to GCC. 156 157config MK7 158 bool "Athlon/Duron/K7" 159 depends on X86_32 160 ---help--- 161 Select this for an AMD Athlon K7-family processor. Enables use of 162 some extended instructions, and passes appropriate optimization 163 flags to GCC. 164 165config MK8 166 bool "Opteron/Athlon64/Hammer/K8" 167 ---help--- 168 Select this for an AMD Opteron or Athlon64 Hammer-family processor. 169 Enables use of some extended instructions, and passes appropriate 170 optimization flags to GCC. 171 172config MCRUSOE 173 bool "Crusoe" 174 depends on X86_32 175 ---help--- 176 Select this for a Transmeta Crusoe processor. Treats the processor 177 like a 586 with TSC, and sets some GCC optimization flags (like a 178 Pentium Pro with no alignment requirements). 179 180config MEFFICEON 181 bool "Efficeon" 182 depends on X86_32 183 ---help--- 184 Select this for a Transmeta Efficeon processor. 185 186config MWINCHIPC6 187 bool "Winchip-C6" 188 depends on X86_32 189 ---help--- 190 Select this for an IDT Winchip C6 chip. Linux and GCC 191 treat this chip as a 586TSC with some extended instructions 192 and alignment requirements. 193 194config MWINCHIP3D 195 bool "Winchip-2/Winchip-2A/Winchip-3" 196 depends on X86_32 197 ---help--- 198 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC 199 treat this chip as a 586TSC with some extended instructions 200 and alignment requirements. Also enable out of order memory 201 stores for this CPU, which can increase performance of some 202 operations. 203 204config MELAN 205 bool "AMD Elan" 206 depends on X86_32 207 ---help--- 208 Select this for an AMD Elan processor. 209 210 Do not use this option for K6/Athlon/Opteron processors! 211 212config MGEODEGX1 213 bool "GeodeGX1" 214 depends on X86_32 215 ---help--- 216 Select this for a Geode GX1 (Cyrix MediaGX) chip. 217 218config MGEODE_LX 219 bool "Geode GX/LX" 220 depends on X86_32 221 ---help--- 222 Select this for AMD Geode GX and LX processors. 223 224config MCYRIXIII 225 bool "CyrixIII/VIA-C3" 226 depends on X86_32 227 ---help--- 228 Select this for a Cyrix III or C3 chip. Presently Linux and GCC 229 treat this chip as a generic 586. Whilst the CPU is 686 class, 230 it lacks the cmov extension which gcc assumes is present when 231 generating 686 code. 232 Note that Nehemiah (Model 9) and above will not boot with this 233 kernel due to them lacking the 3DNow! instructions used in earlier 234 incarnations of the CPU. 235 236config MVIAC3_2 237 bool "VIA C3-2 (Nehemiah)" 238 depends on X86_32 239 ---help--- 240 Select this for a VIA C3 "Nehemiah". Selecting this enables usage 241 of SSE and tells gcc to treat the CPU as a 686. 242 Note, this kernel will not boot on older (pre model 9) C3s. 243 244config MVIAC7 245 bool "VIA C7" 246 depends on X86_32 247 ---help--- 248 Select this for a VIA C7. Selecting this uses the correct cache 249 shift and tells gcc to treat the CPU as a 686. 250 251config MPSC 252 bool "Intel P4 / older Netburst based Xeon" 253 depends on X86_64 254 ---help--- 255 Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey 256 Xeon CPUs with Intel 64bit which is compatible with x86-64. 257 Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the 258 Netburst core and shouldn't use this option. You can distinguish them 259 using the cpu family field 260 in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one. 261 262config MCORE2 263 bool "Core 2/newer Xeon" 264 ---help--- 265 266 Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 267 53xx) CPUs. You can distinguish newer from older Xeons by the CPU 268 family in /proc/cpuinfo. Newer ones have 6 and older ones 15 269 (not a typo) 270 271config MATOM 272 bool "Intel Atom" 273 ---help--- 274 275 Select this for the Intel Atom platform. Intel Atom CPUs have an 276 in-order pipelining architecture and thus can benefit from 277 accordingly optimized code. Use a recent GCC with specific Atom 278 support in order to fully benefit from selecting this option. 279 280config GENERIC_CPU 281 bool "Generic-x86-64" 282 depends on X86_64 283 ---help--- 284 Generic x86-64 CPU. 285 Run equally well on all x86-64 CPUs. 286 287endchoice 288 289config X86_GENERIC 290 bool "Generic x86 support" 291 depends on X86_32 292 ---help--- 293 Instead of just including optimizations for the selected 294 x86 variant (e.g. PII, Crusoe or Athlon), include some more 295 generic optimizations as well. This will make the kernel 296 perform better on x86 CPUs other than that selected. 297 298 This is really intended for distributors who need more 299 generic optimizations. 300 301# 302# Define implied options from the CPU selection here 303config X86_INTERNODE_CACHE_SHIFT 304 int 305 default "12" if X86_VSMP 306 default "7" if NUMA 307 default X86_L1_CACHE_SHIFT 308 309config X86_CMPXCHG 310 def_bool X86_64 || (X86_32 && !M386) 311 312config CMPXCHG_LOCAL 313 def_bool X86_64 || (X86_32 && !M386) 314 315config CMPXCHG_DOUBLE 316 def_bool y 317 318config X86_L1_CACHE_SHIFT 319 int 320 default "7" if MPENTIUM4 || MPSC 321 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU 322 default "4" if MELAN || M486 || M386 || MGEODEGX1 323 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX 324 325config X86_XADD 326 def_bool y 327 depends on X86_64 || !M386 328 329config X86_PPRO_FENCE 330 bool "PentiumPro memory ordering errata workaround" 331 depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1 332 ---help--- 333 Old PentiumPro multiprocessor systems had errata that could cause 334 memory operations to violate the x86 ordering standard in rare cases. 335 Enabling this option will attempt to work around some (but not all) 336 occurrences of this problem, at the cost of much heavier spinlock and 337 memory barrier operations. 338 339 If unsure, say n here. Even distro kernels should think twice before 340 enabling this: there are few systems, and an unlikely bug. 341 342config X86_F00F_BUG 343 def_bool y 344 depends on M586MMX || M586TSC || M586 || M486 || M386 345 346config X86_INVD_BUG 347 def_bool y 348 depends on M486 || M386 349 350config X86_WP_WORKS_OK 351 def_bool y 352 depends on !M386 353 354config X86_INVLPG 355 def_bool y 356 depends on X86_32 && !M386 357 358config X86_BSWAP 359 def_bool y 360 depends on X86_32 && !M386 361 362config X86_POPAD_OK 363 def_bool y 364 depends on X86_32 && !M386 365 366config X86_ALIGNMENT_16 367 def_bool y 368 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 369 370config X86_INTEL_USERCOPY 371 def_bool y 372 depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 373 374config X86_USE_PPRO_CHECKSUM 375 def_bool y 376 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM 377 378config X86_USE_3DNOW 379 def_bool y 380 depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML 381 382config X86_OOSTORE 383 def_bool y 384 depends on (MWINCHIP3D || MWINCHIPC6) && MTRR 385 386# 387# P6_NOPs are a relatively minor optimization that require a family >= 388# 6 processor, except that it is broken on certain VIA chips. 389# Furthermore, AMD chips prefer a totally different sequence of NOPs 390# (which work on all CPUs). In addition, it looks like Virtual PC 391# does not understand them. 392# 393# As a result, disallow these if we're not compiling for X86_64 (these 394# NOPs do work on all x86-64 capable chips); the list of processors in 395# the right-hand clause are the cores that benefit from this optimization. 396# 397config X86_P6_NOP 398 def_bool y 399 depends on X86_64 400 depends on (MCORE2 || MPENTIUM4 || MPSC) 401 402config X86_TSC 403 def_bool y 404 depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MATOM) && !X86_NUMAQ) || X86_64 405 406config X86_CMPXCHG64 407 def_bool y 408 depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM 409 410# this should be set for all -march=.. options where the compiler 411# generates cmov. 412config X86_CMOV 413 def_bool y 414 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX) 415 416config X86_MINIMUM_CPU_FAMILY 417 int 418 default "64" if X86_64 419 default "6" if X86_32 && X86_P6_NOP 420 default "5" if X86_32 && X86_CMPXCHG64 421 default "4" if X86_32 && (X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK) 422 default "3" 423 424config X86_DEBUGCTLMSR 425 def_bool y 426 depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386) && !UML 427 428menuconfig PROCESSOR_SELECT 429 bool "Supported processor vendors" if EXPERT 430 ---help--- 431 This lets you choose what x86 vendor support code your kernel 432 will include. 433 434config CPU_SUP_INTEL 435 default y 436 bool "Support Intel processors" if PROCESSOR_SELECT 437 ---help--- 438 This enables detection, tunings and quirks for Intel processors 439 440 You need this enabled if you want your kernel to run on an 441 Intel CPU. Disabling this option on other types of CPUs 442 makes the kernel a tiny bit smaller. Disabling it on an Intel 443 CPU might render the kernel unbootable. 444 445 If unsure, say N. 446 447config CPU_SUP_CYRIX_32 448 default y 449 bool "Support Cyrix processors" if PROCESSOR_SELECT 450 depends on !64BIT 451 ---help--- 452 This enables detection, tunings and quirks for Cyrix processors 453 454 You need this enabled if you want your kernel to run on a 455 Cyrix CPU. Disabling this option on other types of CPUs 456 makes the kernel a tiny bit smaller. Disabling it on a Cyrix 457 CPU might render the kernel unbootable. 458 459 If unsure, say N. 460 461config CPU_SUP_AMD 462 default y 463 bool "Support AMD processors" if PROCESSOR_SELECT 464 ---help--- 465 This enables detection, tunings and quirks for AMD processors 466 467 You need this enabled if you want your kernel to run on an 468 AMD CPU. Disabling this option on other types of CPUs 469 makes the kernel a tiny bit smaller. Disabling it on an AMD 470 CPU might render the kernel unbootable. 471 472 If unsure, say N. 473 474config CPU_SUP_CENTAUR 475 default y 476 bool "Support Centaur processors" if PROCESSOR_SELECT 477 ---help--- 478 This enables detection, tunings and quirks for Centaur processors 479 480 You need this enabled if you want your kernel to run on a 481 Centaur CPU. Disabling this option on other types of CPUs 482 makes the kernel a tiny bit smaller. Disabling it on a Centaur 483 CPU might render the kernel unbootable. 484 485 If unsure, say N. 486 487config CPU_SUP_TRANSMETA_32 488 default y 489 bool "Support Transmeta processors" if PROCESSOR_SELECT 490 depends on !64BIT 491 ---help--- 492 This enables detection, tunings and quirks for Transmeta processors 493 494 You need this enabled if you want your kernel to run on a 495 Transmeta CPU. Disabling this option on other types of CPUs 496 makes the kernel a tiny bit smaller. Disabling it on a Transmeta 497 CPU might render the kernel unbootable. 498 499 If unsure, say N. 500 501config CPU_SUP_UMC_32 502 default y 503 bool "Support UMC processors" if PROCESSOR_SELECT 504 depends on !64BIT 505 ---help--- 506 This enables detection, tunings and quirks for UMC processors 507 508 You need this enabled if you want your kernel to run on a 509 UMC CPU. Disabling this option on other types of CPUs 510 makes the kernel a tiny bit smaller. Disabling it on a UMC 511 CPU might render the kernel unbootable. 512 513 If unsure, say N. 514