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 M486 8 bool "486" 9 depends on X86_32 10 ---help--- 11 This is the processor type of your CPU. This information is 12 used for optimizing purposes. In order to compile a kernel 13 that can run on all supported x86 CPU types (albeit not 14 optimally fast), you can specify "486" here. 15 16 Note that the 386 is no longer supported, this includes 17 AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2, 18 UMC 486SX-S and the NexGen Nx586. 19 20 The kernel will not necessarily run on earlier architectures than 21 the one you have chosen, e.g. a Pentium optimized kernel will run on 22 a PPro, but not necessarily on a i486. 23 24 Here are the settings recommended for greatest speed: 25 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or 26 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S. 27 - "586" for generic Pentium CPUs lacking the TSC 28 (time stamp counter) register. 29 - "Pentium-Classic" for the Intel Pentium. 30 - "Pentium-MMX" for the Intel Pentium MMX. 31 - "Pentium-Pro" for the Intel Pentium Pro. 32 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron. 33 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron. 34 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron. 35 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D). 36 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird). 37 - "Crusoe" for the Transmeta Crusoe series. 38 - "Efficeon" for the Transmeta Efficeon series. 39 - "Winchip-C6" for original IDT Winchip. 40 - "Winchip-2" for IDT Winchips with 3dNow! capabilities. 41 - "GeodeGX1" for Geode GX1 (Cyrix MediaGX). 42 - "Geode GX/LX" For AMD Geode GX and LX processors. 43 - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3. 44 - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above). 45 - "VIA C7" for VIA C7. 46 47 If you don't know what to do, choose "486". 48 49config M586 50 bool "586/K5/5x86/6x86/6x86MX" 51 depends on X86_32 52 ---help--- 53 Select this for an 586 or 686 series processor such as the AMD K5, 54 the Cyrix 5x86, 6x86 and 6x86MX. This choice does not 55 assume the RDTSC (Read Time Stamp Counter) instruction. 56 57config M586TSC 58 bool "Pentium-Classic" 59 depends on X86_32 60 ---help--- 61 Select this for a Pentium Classic processor with the RDTSC (Read 62 Time Stamp Counter) instruction for benchmarking. 63 64config M586MMX 65 bool "Pentium-MMX" 66 depends on X86_32 67 ---help--- 68 Select this for a Pentium with the MMX graphics/multimedia 69 extended instructions. 70 71config M686 72 bool "Pentium-Pro" 73 depends on X86_32 74 ---help--- 75 Select this for Intel Pentium Pro chips. This enables the use of 76 Pentium Pro extended instructions, and disables the init-time guard 77 against the f00f bug found in earlier Pentiums. 78 79config MPENTIUMII 80 bool "Pentium-II/Celeron(pre-Coppermine)" 81 depends on X86_32 82 ---help--- 83 Select this for Intel chips based on the Pentium-II and 84 pre-Coppermine Celeron core. This option enables an unaligned 85 copy optimization, compiles the kernel with optimization flags 86 tailored for the chip, and applies any applicable Pentium Pro 87 optimizations. 88 89config MPENTIUMIII 90 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon" 91 depends on X86_32 92 ---help--- 93 Select this for Intel chips based on the Pentium-III and 94 Celeron-Coppermine core. This option enables use of some 95 extended prefetch instructions in addition to the Pentium II 96 extensions. 97 98config MPENTIUMM 99 bool "Pentium M" 100 depends on X86_32 101 ---help--- 102 Select this for Intel Pentium M (not Pentium-4 M) 103 notebook chips. 104 105config MPENTIUM4 106 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon" 107 depends on X86_32 108 ---help--- 109 Select this for Intel Pentium 4 chips. This includes the 110 Pentium 4, Pentium D, P4-based Celeron and Xeon, and 111 Pentium-4 M (not Pentium M) chips. This option enables compile 112 flags optimized for the chip, uses the correct cache line size, and 113 applies any applicable optimizations. 114 115 CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 ) 116 117 Select this for: 118 Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename: 119 -Willamette 120 -Northwood 121 -Mobile Pentium 4 122 -Mobile Pentium 4 M 123 -Extreme Edition (Gallatin) 124 -Prescott 125 -Prescott 2M 126 -Cedar Mill 127 -Presler 128 -Smithfiled 129 Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename: 130 -Foster 131 -Prestonia 132 -Gallatin 133 -Nocona 134 -Irwindale 135 -Cranford 136 -Potomac 137 -Paxville 138 -Dempsey 139 140 141config MK6 142 bool "K6/K6-II/K6-III" 143 depends on X86_32 144 ---help--- 145 Select this for an AMD K6-family processor. Enables use of 146 some extended instructions, and passes appropriate optimization 147 flags to GCC. 148 149config MK7 150 bool "Athlon/Duron/K7" 151 depends on X86_32 152 ---help--- 153 Select this for an AMD Athlon K7-family processor. Enables use of 154 some extended instructions, and passes appropriate optimization 155 flags to GCC. 156 157config MK8 158 bool "Opteron/Athlon64/Hammer/K8" 159 ---help--- 160 Select this for an AMD Opteron or Athlon64 Hammer-family processor. 161 Enables use of some extended instructions, and passes appropriate 162 optimization flags to GCC. 163 164config MCRUSOE 165 bool "Crusoe" 166 depends on X86_32 167 ---help--- 168 Select this for a Transmeta Crusoe processor. Treats the processor 169 like a 586 with TSC, and sets some GCC optimization flags (like a 170 Pentium Pro with no alignment requirements). 171 172config MEFFICEON 173 bool "Efficeon" 174 depends on X86_32 175 ---help--- 176 Select this for a Transmeta Efficeon processor. 177 178config MWINCHIPC6 179 bool "Winchip-C6" 180 depends on X86_32 181 ---help--- 182 Select this for an IDT Winchip C6 chip. Linux and GCC 183 treat this chip as a 586TSC with some extended instructions 184 and alignment requirements. 185 186config MWINCHIP3D 187 bool "Winchip-2/Winchip-2A/Winchip-3" 188 depends on X86_32 189 ---help--- 190 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC 191 treat this chip as a 586TSC with some extended instructions 192 and alignment requirements. Also enable out of order memory 193 stores for this CPU, which can increase performance of some 194 operations. 195 196config MELAN 197 bool "AMD Elan" 198 depends on X86_32 199 ---help--- 200 Select this for an AMD Elan processor. 201 202 Do not use this option for K6/Athlon/Opteron processors! 203 204config MGEODEGX1 205 bool "GeodeGX1" 206 depends on X86_32 207 ---help--- 208 Select this for a Geode GX1 (Cyrix MediaGX) chip. 209 210config MGEODE_LX 211 bool "Geode GX/LX" 212 depends on X86_32 213 ---help--- 214 Select this for AMD Geode GX and LX processors. 215 216config MCYRIXIII 217 bool "CyrixIII/VIA-C3" 218 depends on X86_32 219 ---help--- 220 Select this for a Cyrix III or C3 chip. Presently Linux and GCC 221 treat this chip as a generic 586. Whilst the CPU is 686 class, 222 it lacks the cmov extension which gcc assumes is present when 223 generating 686 code. 224 Note that Nehemiah (Model 9) and above will not boot with this 225 kernel due to them lacking the 3DNow! instructions used in earlier 226 incarnations of the CPU. 227 228config MVIAC3_2 229 bool "VIA C3-2 (Nehemiah)" 230 depends on X86_32 231 ---help--- 232 Select this for a VIA C3 "Nehemiah". Selecting this enables usage 233 of SSE and tells gcc to treat the CPU as a 686. 234 Note, this kernel will not boot on older (pre model 9) C3s. 235 236config MVIAC7 237 bool "VIA C7" 238 depends on X86_32 239 ---help--- 240 Select this for a VIA C7. Selecting this uses the correct cache 241 shift and tells gcc to treat the CPU as a 686. 242 243config MPSC 244 bool "Intel P4 / older Netburst based Xeon" 245 depends on X86_64 246 ---help--- 247 Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey 248 Xeon CPUs with Intel 64bit which is compatible with x86-64. 249 Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the 250 Netburst core and shouldn't use this option. You can distinguish them 251 using the cpu family field 252 in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one. 253 254config MCORE2 255 bool "Core 2/newer Xeon" 256 ---help--- 257 258 Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 259 53xx) CPUs. You can distinguish newer from older Xeons by the CPU 260 family in /proc/cpuinfo. Newer ones have 6 and older ones 15 261 (not a typo) 262 263config MATOM 264 bool "Intel Atom" 265 ---help--- 266 267 Select this for the Intel Atom platform. Intel Atom CPUs have an 268 in-order pipelining architecture and thus can benefit from 269 accordingly optimized code. Use a recent GCC with specific Atom 270 support in order to fully benefit from selecting this option. 271 272config GENERIC_CPU 273 bool "Generic-x86-64" 274 depends on X86_64 275 ---help--- 276 Generic x86-64 CPU. 277 Run equally well on all x86-64 CPUs. 278 279endchoice 280 281config X86_GENERIC 282 bool "Generic x86 support" 283 depends on X86_32 284 ---help--- 285 Instead of just including optimizations for the selected 286 x86 variant (e.g. PII, Crusoe or Athlon), include some more 287 generic optimizations as well. This will make the kernel 288 perform better on x86 CPUs other than that selected. 289 290 This is really intended for distributors who need more 291 generic optimizations. 292 293# 294# Define implied options from the CPU selection here 295config X86_INTERNODE_CACHE_SHIFT 296 int 297 default "12" if X86_VSMP 298 default X86_L1_CACHE_SHIFT 299 300config X86_L1_CACHE_SHIFT 301 int 302 default "7" if MPENTIUM4 || MPSC 303 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU 304 default "4" if MELAN || M486 || MGEODEGX1 305 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX 306 307config X86_PPRO_FENCE 308 bool "PentiumPro memory ordering errata workaround" 309 depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1 310 ---help--- 311 Old PentiumPro multiprocessor systems had errata that could cause 312 memory operations to violate the x86 ordering standard in rare cases. 313 Enabling this option will attempt to work around some (but not all) 314 occurrences of this problem, at the cost of much heavier spinlock and 315 memory barrier operations. 316 317 If unsure, say n here. Even distro kernels should think twice before 318 enabling this: there are few systems, and an unlikely bug. 319 320config X86_F00F_BUG 321 def_bool y 322 depends on M586MMX || M586TSC || M586 || M486 323 324config X86_INVD_BUG 325 def_bool y 326 depends on M486 327 328config X86_ALIGNMENT_16 329 def_bool y 330 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 331 332config X86_INTEL_USERCOPY 333 def_bool y 334 depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 335 336config X86_USE_PPRO_CHECKSUM 337 def_bool y 338 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM 339 340config X86_USE_3DNOW 341 def_bool y 342 depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML 343 344# 345# P6_NOPs are a relatively minor optimization that require a family >= 346# 6 processor, except that it is broken on certain VIA chips. 347# Furthermore, AMD chips prefer a totally different sequence of NOPs 348# (which work on all CPUs). In addition, it looks like Virtual PC 349# does not understand them. 350# 351# As a result, disallow these if we're not compiling for X86_64 (these 352# NOPs do work on all x86-64 capable chips); the list of processors in 353# the right-hand clause are the cores that benefit from this optimization. 354# 355config X86_P6_NOP 356 def_bool y 357 depends on X86_64 358 depends on (MCORE2 || MPENTIUM4 || MPSC) 359 360config X86_TSC 361 def_bool y 362 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_64 363 364config X86_CMPXCHG64 365 def_bool y 366 depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM 367 368# this should be set for all -march=.. options where the compiler 369# generates cmov. 370config X86_CMOV 371 def_bool y 372 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX) 373 374config X86_MINIMUM_CPU_FAMILY 375 int 376 default "64" if X86_64 377 default "6" if X86_32 && X86_P6_NOP 378 default "5" if X86_32 && X86_CMPXCHG64 379 default "4" 380 381config X86_DEBUGCTLMSR 382 def_bool y 383 depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486) && !UML 384 385menuconfig PROCESSOR_SELECT 386 bool "Supported processor vendors" if EXPERT 387 ---help--- 388 This lets you choose what x86 vendor support code your kernel 389 will include. 390 391config CPU_SUP_INTEL 392 default y 393 bool "Support Intel processors" if PROCESSOR_SELECT 394 ---help--- 395 This enables detection, tunings and quirks for Intel processors 396 397 You need this enabled if you want your kernel to run on an 398 Intel CPU. Disabling this option on other types of CPUs 399 makes the kernel a tiny bit smaller. Disabling it on an Intel 400 CPU might render the kernel unbootable. 401 402 If unsure, say N. 403 404config CPU_SUP_CYRIX_32 405 default y 406 bool "Support Cyrix processors" if PROCESSOR_SELECT 407 depends on M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT) 408 ---help--- 409 This enables detection, tunings and quirks for Cyrix processors 410 411 You need this enabled if you want your kernel to run on a 412 Cyrix CPU. Disabling this option on other types of CPUs 413 makes the kernel a tiny bit smaller. Disabling it on a Cyrix 414 CPU might render the kernel unbootable. 415 416 If unsure, say N. 417 418config CPU_SUP_AMD 419 default y 420 bool "Support AMD processors" if PROCESSOR_SELECT 421 ---help--- 422 This enables detection, tunings and quirks for AMD processors 423 424 You need this enabled if you want your kernel to run on an 425 AMD CPU. Disabling this option on other types of CPUs 426 makes the kernel a tiny bit smaller. Disabling it on an AMD 427 CPU might render the kernel unbootable. 428 429 If unsure, say N. 430 431config CPU_SUP_CENTAUR 432 default y 433 bool "Support Centaur processors" if PROCESSOR_SELECT 434 ---help--- 435 This enables detection, tunings and quirks for Centaur processors 436 437 You need this enabled if you want your kernel to run on a 438 Centaur CPU. Disabling this option on other types of CPUs 439 makes the kernel a tiny bit smaller. Disabling it on a Centaur 440 CPU might render the kernel unbootable. 441 442 If unsure, say N. 443 444config CPU_SUP_TRANSMETA_32 445 default y 446 bool "Support Transmeta processors" if PROCESSOR_SELECT 447 depends on !64BIT 448 ---help--- 449 This enables detection, tunings and quirks for Transmeta processors 450 451 You need this enabled if you want your kernel to run on a 452 Transmeta CPU. Disabling this option on other types of CPUs 453 makes the kernel a tiny bit smaller. Disabling it on a Transmeta 454 CPU might render the kernel unbootable. 455 456 If unsure, say N. 457 458config CPU_SUP_UMC_32 459 default y 460 bool "Support UMC processors" if PROCESSOR_SELECT 461 depends on M486 || (EXPERT && !64BIT) 462 ---help--- 463 This enables detection, tunings and quirks for UMC processors 464 465 You need this enabled if you want your kernel to run on a 466 UMC CPU. Disabling this option on other types of CPUs 467 makes the kernel a tiny bit smaller. Disabling it on a UMC 468 CPU might render the kernel unbootable. 469 470 If unsure, say N. 471