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96d55b88 1# Put here option for CPU selection and depending optimization
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2choice
3 prompt "Processor family"
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4 default M686 if X86_32
5 default GENERIC_CPU if X86_64
96d55b88 6 ---help---
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7 This is the processor type of your CPU. This information is
8 used for optimizing purposes. In order to compile a kernel
9 that can run on all supported x86 CPU types (albeit not
10 optimally fast), you can specify "486" here.
11
12 Note that the 386 is no longer supported, this includes
13 AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2,
11af32b6 14 UMC 486SX-S and the NexGen Nx586.
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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:
96d55b88 21 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
221836e9 22 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
96d55b88 23 - "586" for generic Pentium CPUs lacking the TSC
221836e9 24 (time stamp counter) register.
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25 - "Pentium-Classic" for the Intel Pentium.
26 - "Pentium-MMX" for the Intel Pentium MMX.
27 - "Pentium-Pro" for the Intel Pentium Pro.
28 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
29 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
30 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
31 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
32 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
221836e9 33 - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
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34 - "Crusoe" for the Transmeta Crusoe series.
35 - "Efficeon" for the Transmeta Efficeon series.
36 - "Winchip-C6" for original IDT Winchip.
69d45dd1 37 - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
221836e9 38 - "AMD Elan" for the 32-bit AMD Elan embedded CPU.
96d55b88 39 - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
f90b8116 40 - "Geode GX/LX" For AMD Geode GX and LX processors.
96d55b88 41 - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
48a1204c 42 - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above).
0949be35 43 - "VIA C7" for VIA C7.
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44 - "Intel P4" for the Pentium 4/Netburst microarchitecture.
45 - "Core 2/newer Xeon" for all core2 and newer Intel CPUs.
46 - "Intel Atom" for the Atom-microarchitecture CPUs.
47 - "Generic-x86-64" for a kernel which runs on any x86-64 CPU.
48
49 See each option's help text for additional details. If you don't know
50 what to do, choose "486".
96d55b88 51
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52config M486
53 bool "486"
54 depends on X86_32
55 ---help---
56 Select this for an 486-class CPU such as AMD/Cyrix/IBM/Intel
57 486DX/DX2/DX4 or SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
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58
59config M586
60 bool "586/K5/5x86/6x86/6x86MX"
1032c0ba 61 depends on X86_32
8f9ca475 62 ---help---
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63 Select this for an 586 or 686 series processor such as the AMD K5,
64 the Cyrix 5x86, 6x86 and 6x86MX. This choice does not
65 assume the RDTSC (Read Time Stamp Counter) instruction.
66
67config M586TSC
68 bool "Pentium-Classic"
1032c0ba 69 depends on X86_32
8f9ca475 70 ---help---
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71 Select this for a Pentium Classic processor with the RDTSC (Read
72 Time Stamp Counter) instruction for benchmarking.
73
74config M586MMX
75 bool "Pentium-MMX"
1032c0ba 76 depends on X86_32
8f9ca475 77 ---help---
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78 Select this for a Pentium with the MMX graphics/multimedia
79 extended instructions.
80
81config M686
82 bool "Pentium-Pro"
1032c0ba 83 depends on X86_32
8f9ca475 84 ---help---
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85 Select this for Intel Pentium Pro chips. This enables the use of
86 Pentium Pro extended instructions, and disables the init-time guard
87 against the f00f bug found in earlier Pentiums.
88
89config MPENTIUMII
90 bool "Pentium-II/Celeron(pre-Coppermine)"
1032c0ba 91 depends on X86_32
8f9ca475 92 ---help---
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93 Select this for Intel chips based on the Pentium-II and
94 pre-Coppermine Celeron core. This option enables an unaligned
95 copy optimization, compiles the kernel with optimization flags
96 tailored for the chip, and applies any applicable Pentium Pro
97 optimizations.
98
99config MPENTIUMIII
100 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
1032c0ba 101 depends on X86_32
8f9ca475 102 ---help---
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103 Select this for Intel chips based on the Pentium-III and
104 Celeron-Coppermine core. This option enables use of some
105 extended prefetch instructions in addition to the Pentium II
106 extensions.
107
108config MPENTIUMM
109 bool "Pentium M"
1032c0ba 110 depends on X86_32
8f9ca475 111 ---help---
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112 Select this for Intel Pentium M (not Pentium-4 M)
113 notebook chips.
114
115config MPENTIUM4
c55d92d1 116 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
1032c0ba 117 depends on X86_32
8f9ca475 118 ---help---
96d55b88 119 Select this for Intel Pentium 4 chips. This includes the
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120 Pentium 4, Pentium D, P4-based Celeron and Xeon, and
121 Pentium-4 M (not Pentium M) chips. This option enables compile
122 flags optimized for the chip, uses the correct cache line size, and
123 applies any applicable optimizations.
124
125 CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 )
126
127 Select this for:
128 Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename:
129 -Willamette
130 -Northwood
131 -Mobile Pentium 4
132 -Mobile Pentium 4 M
133 -Extreme Edition (Gallatin)
134 -Prescott
135 -Prescott 2M
136 -Cedar Mill
137 -Presler
138 -Smithfiled
139 Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename:
140 -Foster
141 -Prestonia
142 -Gallatin
143 -Nocona
144 -Irwindale
145 -Cranford
146 -Potomac
147 -Paxville
148 -Dempsey
149
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150
151config MK6
152 bool "K6/K6-II/K6-III"
1032c0ba 153 depends on X86_32
8f9ca475 154 ---help---
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155 Select this for an AMD K6-family processor. Enables use of
156 some extended instructions, and passes appropriate optimization
157 flags to GCC.
158
159config MK7
160 bool "Athlon/Duron/K7"
1032c0ba 161 depends on X86_32
8f9ca475 162 ---help---
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163 Select this for an AMD Athlon K7-family processor. Enables use of
164 some extended instructions, and passes appropriate optimization
165 flags to GCC.
166
167config MK8
168 bool "Opteron/Athlon64/Hammer/K8"
8f9ca475 169 ---help---
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170 Select this for an AMD Opteron or Athlon64 Hammer-family processor.
171 Enables use of some extended instructions, and passes appropriate
172 optimization flags to GCC.
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173
174config MCRUSOE
175 bool "Crusoe"
1032c0ba 176 depends on X86_32
8f9ca475 177 ---help---
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178 Select this for a Transmeta Crusoe processor. Treats the processor
179 like a 586 with TSC, and sets some GCC optimization flags (like a
180 Pentium Pro with no alignment requirements).
181
182config MEFFICEON
183 bool "Efficeon"
1032c0ba 184 depends on X86_32
8f9ca475 185 ---help---
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186 Select this for a Transmeta Efficeon processor.
187
188config MWINCHIPC6
189 bool "Winchip-C6"
1032c0ba 190 depends on X86_32
8f9ca475 191 ---help---
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192 Select this for an IDT Winchip C6 chip. Linux and GCC
193 treat this chip as a 586TSC with some extended instructions
194 and alignment requirements.
195
96d55b88 196config MWINCHIP3D
69d45dd1 197 bool "Winchip-2/Winchip-2A/Winchip-3"
1032c0ba 198 depends on X86_32
8f9ca475 199 ---help---
69d45dd1 200 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
96d55b88 201 treat this chip as a 586TSC with some extended instructions
3dde6ad8 202 and alignment requirements. Also enable out of order memory
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203 stores for this CPU, which can increase performance of some
204 operations.
205
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206config MELAN
207 bool "AMD Elan"
208 depends on X86_32
209 ---help---
210 Select this for an AMD Elan processor.
211
212 Do not use this option for K6/Athlon/Opteron processors!
213
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214config MGEODEGX1
215 bool "GeodeGX1"
1032c0ba 216 depends on X86_32
8f9ca475 217 ---help---
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218 Select this for a Geode GX1 (Cyrix MediaGX) chip.
219
f90b8116 220config MGEODE_LX
96daa8cd 221 bool "Geode GX/LX"
1032c0ba 222 depends on X86_32
8f9ca475 223 ---help---
96daa8cd 224 Select this for AMD Geode GX and LX processors.
f90b8116 225
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226config MCYRIXIII
227 bool "CyrixIII/VIA-C3"
1032c0ba 228 depends on X86_32
8f9ca475 229 ---help---
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230 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
231 treat this chip as a generic 586. Whilst the CPU is 686 class,
232 it lacks the cmov extension which gcc assumes is present when
233 generating 686 code.
234 Note that Nehemiah (Model 9) and above will not boot with this
235 kernel due to them lacking the 3DNow! instructions used in earlier
236 incarnations of the CPU.
237
238config MVIAC3_2
239 bool "VIA C3-2 (Nehemiah)"
1032c0ba 240 depends on X86_32
8f9ca475 241 ---help---
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242 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
243 of SSE and tells gcc to treat the CPU as a 686.
244 Note, this kernel will not boot on older (pre model 9) C3s.
245
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246config MVIAC7
247 bool "VIA C7"
1032c0ba 248 depends on X86_32
8f9ca475 249 ---help---
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250 Select this for a VIA C7. Selecting this uses the correct cache
251 shift and tells gcc to treat the CPU as a 686.
252
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253config MPSC
254 bool "Intel P4 / older Netburst based Xeon"
255 depends on X86_64
8f9ca475 256 ---help---
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257 Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
258 Xeon CPUs with Intel 64bit which is compatible with x86-64.
259 Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
96daa8cd 260 Netburst core and shouldn't use this option. You can distinguish them
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261 using the cpu family field
262 in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
263
264config MCORE2
265 bool "Core 2/newer Xeon"
8f9ca475 266 ---help---
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267
268 Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
269 53xx) CPUs. You can distinguish newer from older Xeons by the CPU
270 family in /proc/cpuinfo. Newer ones have 6 and older ones 15
271 (not a typo)
1032c0ba 272
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273config MATOM
274 bool "Intel Atom"
275 ---help---
276
277 Select this for the Intel Atom platform. Intel Atom CPUs have an
278 in-order pipelining architecture and thus can benefit from
279 accordingly optimized code. Use a recent GCC with specific Atom
280 support in order to fully benefit from selecting this option.
281
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282config GENERIC_CPU
283 bool "Generic-x86-64"
284 depends on X86_64
8f9ca475 285 ---help---
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286 Generic x86-64 CPU.
287 Run equally well on all x86-64 CPUs.
288
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289endchoice
290
291config X86_GENERIC
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292 bool "Generic x86 support"
293 depends on X86_32
8f9ca475 294 ---help---
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295 Instead of just including optimizations for the selected
296 x86 variant (e.g. PII, Crusoe or Athlon), include some more
297 generic optimizations as well. This will make the kernel
298 perform better on x86 CPUs other than that selected.
299
300 This is really intended for distributors who need more
301 generic optimizations.
302
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303#
304# Define implied options from the CPU selection here
350f8f56 305config X86_INTERNODE_CACHE_SHIFT
1032c0ba 306 int
350f8f56 307 default "12" if X86_VSMP
350f8f56 308 default X86_L1_CACHE_SHIFT
1032c0ba 309
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310config X86_L1_CACHE_SHIFT
311 int
0a2a18b7 312 default "7" if MPENTIUM4 || MPSC
350f8f56 313 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
eb068e78 314 default "4" if MELAN || M486 || MGEODEGX1
69d45dd1 315 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
96d55b88 316
96d55b88 317config X86_PPRO_FENCE
fb0328e2 318 bool "PentiumPro memory ordering errata workaround"
eb068e78 319 depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1
8f9ca475 320 ---help---
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321 Old PentiumPro multiprocessor systems had errata that could cause
322 memory operations to violate the x86 ordering standard in rare cases.
323 Enabling this option will attempt to work around some (but not all)
0d2eb44f 324 occurrences of this problem, at the cost of much heavier spinlock and
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325 memory barrier operations.
326
327 If unsure, say n here. Even distro kernels should think twice before
328 enabling this: there are few systems, and an unlikely bug.
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329
330config X86_F00F_BUG
96daa8cd 331 def_bool y
eb068e78 332 depends on M586MMX || M586TSC || M586 || M486
96d55b88 333
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334config X86_INVD_BUG
335 def_bool y
eb068e78 336 depends on M486
40d2e763 337
96d55b88 338config X86_ALIGNMENT_16
96daa8cd 339 def_bool y
ce9c99af 340 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
96d55b88 341
96d55b88 342config X86_INTEL_USERCOPY
96daa8cd 343 def_bool y
c55d92d1 344 depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
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345
346config X86_USE_PPRO_CHECKSUM
96daa8cd 347 def_bool y
1eda75c1 348 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
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349
350config X86_USE_3DNOW
96daa8cd 351 def_bool y
1b4ad242 352 depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
96d55b88 353
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354#
355# P6_NOPs are a relatively minor optimization that require a family >=
356# 6 processor, except that it is broken on certain VIA chips.
357# Furthermore, AMD chips prefer a totally different sequence of NOPs
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358# (which work on all CPUs). In addition, it looks like Virtual PC
359# does not understand them.
360#
361# As a result, disallow these if we're not compiling for X86_64 (these
362# NOPs do work on all x86-64 capable chips); the list of processors in
363# the right-hand clause are the cores that benefit from this optimization.
959b3be6 364#
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365config X86_P6_NOP
366 def_bool y
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367 depends on X86_64
368 depends on (MCORE2 || MPENTIUM4 || MPSC)
7343b3b3 369
96d55b88 370config X86_TSC
96daa8cd 371 def_bool y
b5660ba7 372 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
c7f81c94 373
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374config X86_CMPXCHG64
375 def_bool y
db677ffa 376 depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM
f8096f92 377
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378# this should be set for all -march=.. options where the compiler
379# generates cmov.
380config X86_CMOV
96daa8cd 381 def_bool y
98059e34 382 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
c7f81c94 383
de32e041 384config X86_MINIMUM_CPU_FAMILY
c7f81c94 385 int
1032c0ba 386 default "64" if X86_64
7343b3b3 387 default "6" if X86_32 && X86_P6_NOP
982d007a 388 default "5" if X86_32 && X86_CMPXCHG64
eb068e78 389 default "4"
c7f81c94 390
0a049bb0 391config X86_DEBUGCTLMSR
96daa8cd 392 def_bool y
eb068e78 393 depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486) && !UML
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394
395menuconfig PROCESSOR_SELECT
6a108a14 396 bool "Supported processor vendors" if EXPERT
8f9ca475 397 ---help---
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398 This lets you choose what x86 vendor support code your kernel
399 will include.
400
879d792b 401config CPU_SUP_INTEL
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402 default y
403 bool "Support Intel processors" if PROCESSOR_SELECT
8f9ca475 404 ---help---
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405 This enables detection, tunings and quirks for Intel processors
406
407 You need this enabled if you want your kernel to run on an
408 Intel CPU. Disabling this option on other types of CPUs
409 makes the kernel a tiny bit smaller. Disabling it on an Intel
410 CPU might render the kernel unbootable.
411
412 If unsure, say N.
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413
414config CPU_SUP_CYRIX_32
415 default y
416 bool "Support Cyrix processors" if PROCESSOR_SELECT
eb068e78 417 depends on M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT)
8f9ca475 418 ---help---
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419 This enables detection, tunings and quirks for Cyrix processors
420
421 You need this enabled if you want your kernel to run on a
422 Cyrix CPU. Disabling this option on other types of CPUs
423 makes the kernel a tiny bit smaller. Disabling it on a Cyrix
424 CPU might render the kernel unbootable.
425
426 If unsure, say N.
8d02c211 427
ff73152c 428config CPU_SUP_AMD
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429 default y
430 bool "Support AMD processors" if PROCESSOR_SELECT
8f9ca475 431 ---help---
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432 This enables detection, tunings and quirks for AMD processors
433
434 You need this enabled if you want your kernel to run on an
435 AMD CPU. Disabling this option on other types of CPUs
436 makes the kernel a tiny bit smaller. Disabling it on an AMD
437 CPU might render the kernel unbootable.
438
439 If unsure, say N.
8d02c211 440
48f4c485 441config CPU_SUP_CENTAUR
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442 default y
443 bool "Support Centaur processors" if PROCESSOR_SELECT
8f9ca475 444 ---help---
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445 This enables detection, tunings and quirks for Centaur processors
446
447 You need this enabled if you want your kernel to run on a
448 Centaur CPU. Disabling this option on other types of CPUs
449 makes the kernel a tiny bit smaller. Disabling it on a Centaur
450 CPU might render the kernel unbootable.
451
452 If unsure, say N.
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453
454config CPU_SUP_TRANSMETA_32
455 default y
456 bool "Support Transmeta processors" if PROCESSOR_SELECT
457 depends on !64BIT
8f9ca475 458 ---help---
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459 This enables detection, tunings and quirks for Transmeta processors
460
461 You need this enabled if you want your kernel to run on a
462 Transmeta CPU. Disabling this option on other types of CPUs
463 makes the kernel a tiny bit smaller. Disabling it on a Transmeta
464 CPU might render the kernel unbootable.
465
466 If unsure, say N.
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467
468config CPU_SUP_UMC_32
469 default y
470 bool "Support UMC processors" if PROCESSOR_SELECT
eb068e78 471 depends on M486 || (EXPERT && !64BIT)
8f9ca475 472 ---help---
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473 This enables detection, tunings and quirks for UMC processors
474
475 You need this enabled if you want your kernel to run on a
476 UMC CPU. Disabling this option on other types of CPUs
477 makes the kernel a tiny bit smaller. Disabling it on a UMC
478 CPU might render the kernel unbootable.
479
480 If unsure, say N.