Loading...
1# SPDX-License-Identifier: GPL-2.0
2# Put here option for CPU selection and depending optimization
3choice
4 prompt "Processor family"
5 default M686 if X86_32
6 default GENERIC_CPU if X86_64
7 ---help---
8 This is the processor type of your CPU. This information is
9 used for optimizing purposes. In order to compile a kernel
10 that can run on all supported x86 CPU types (albeit not
11 optimally fast), you can specify "486" here.
12
13 Note that the 386 is no longer supported, this includes
14 AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2,
15 UMC 486SX-S and the NexGen Nx586.
16
17 The kernel will not necessarily run on earlier architectures than
18 the one you have chosen, e.g. a Pentium optimized kernel will run on
19 a PPro, but not necessarily on a i486.
20
21 Here are the settings recommended for greatest speed:
22 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
23 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
24 - "586" for generic Pentium CPUs lacking the TSC
25 (time stamp counter) register.
26 - "Pentium-Classic" for the Intel Pentium.
27 - "Pentium-MMX" for the Intel Pentium MMX.
28 - "Pentium-Pro" for the Intel Pentium Pro.
29 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
30 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
31 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
32 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
33 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
34 - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
35 - "Crusoe" for the Transmeta Crusoe series.
36 - "Efficeon" for the Transmeta Efficeon series.
37 - "Winchip-C6" for original IDT Winchip.
38 - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
39 - "AMD Elan" for the 32-bit AMD Elan embedded CPU.
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 - "Intel P4" for the Pentium 4/Netburst microarchitecture.
46 - "Core 2/newer Xeon" for all core2 and newer Intel CPUs.
47 - "Intel Atom" for the Atom-microarchitecture CPUs.
48 - "Generic-x86-64" for a kernel which runs on any x86-64 CPU.
49
50 See each option's help text for additional details. If you don't know
51 what to do, choose "486".
52
53config M486
54 bool "486"
55 depends on X86_32
56 ---help---
57 Select this for an 486-class CPU such as AMD/Cyrix/IBM/Intel
58 486DX/DX2/DX4 or SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
59
60config M586
61 bool "586/K5/5x86/6x86/6x86MX"
62 depends on X86_32
63 ---help---
64 Select this for an 586 or 686 series processor such as the AMD K5,
65 the Cyrix 5x86, 6x86 and 6x86MX. This choice does not
66 assume the RDTSC (Read Time Stamp Counter) instruction.
67
68config M586TSC
69 bool "Pentium-Classic"
70 depends on X86_32
71 ---help---
72 Select this for a Pentium Classic processor with the RDTSC (Read
73 Time Stamp Counter) instruction for benchmarking.
74
75config M586MMX
76 bool "Pentium-MMX"
77 depends on X86_32
78 ---help---
79 Select this for a Pentium with the MMX graphics/multimedia
80 extended instructions.
81
82config M686
83 bool "Pentium-Pro"
84 depends on X86_32
85 ---help---
86 Select this for Intel Pentium Pro chips. This enables the use of
87 Pentium Pro extended instructions, and disables the init-time guard
88 against the f00f bug found in earlier Pentiums.
89
90config MPENTIUMII
91 bool "Pentium-II/Celeron(pre-Coppermine)"
92 depends on X86_32
93 ---help---
94 Select this for Intel chips based on the Pentium-II and
95 pre-Coppermine Celeron core. This option enables an unaligned
96 copy optimization, compiles the kernel with optimization flags
97 tailored for the chip, and applies any applicable Pentium Pro
98 optimizations.
99
100config MPENTIUMIII
101 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
102 depends on X86_32
103 ---help---
104 Select this for Intel chips based on the Pentium-III and
105 Celeron-Coppermine core. This option enables use of some
106 extended prefetch instructions in addition to the Pentium II
107 extensions.
108
109config MPENTIUMM
110 bool "Pentium M"
111 depends on X86_32
112 ---help---
113 Select this for Intel Pentium M (not Pentium-4 M)
114 notebook chips.
115
116config MPENTIUM4
117 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
118 depends on X86_32
119 ---help---
120 Select this for Intel Pentium 4 chips. This includes the
121 Pentium 4, Pentium D, P4-based Celeron and Xeon, and
122 Pentium-4 M (not Pentium M) chips. This option enables compile
123 flags optimized for the chip, uses the correct cache line size, and
124 applies any applicable optimizations.
125
126 CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 )
127
128 Select this for:
129 Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename:
130 -Willamette
131 -Northwood
132 -Mobile Pentium 4
133 -Mobile Pentium 4 M
134 -Extreme Edition (Gallatin)
135 -Prescott
136 -Prescott 2M
137 -Cedar Mill
138 -Presler
139 -Smithfiled
140 Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename:
141 -Foster
142 -Prestonia
143 -Gallatin
144 -Nocona
145 -Irwindale
146 -Cranford
147 -Potomac
148 -Paxville
149 -Dempsey
150
151
152config MK6
153 bool "K6/K6-II/K6-III"
154 depends on X86_32
155 ---help---
156 Select this for an AMD K6-family processor. Enables use of
157 some extended instructions, and passes appropriate optimization
158 flags to GCC.
159
160config MK7
161 bool "Athlon/Duron/K7"
162 depends on X86_32
163 ---help---
164 Select this for an AMD Athlon K7-family processor. Enables use of
165 some extended instructions, and passes appropriate optimization
166 flags to GCC.
167
168config MK8
169 bool "Opteron/Athlon64/Hammer/K8"
170 ---help---
171 Select this for an AMD Opteron or Athlon64 Hammer-family processor.
172 Enables use of some extended instructions, and passes appropriate
173 optimization flags to GCC.
174
175config MCRUSOE
176 bool "Crusoe"
177 depends on X86_32
178 ---help---
179 Select this for a Transmeta Crusoe processor. Treats the processor
180 like a 586 with TSC, and sets some GCC optimization flags (like a
181 Pentium Pro with no alignment requirements).
182
183config MEFFICEON
184 bool "Efficeon"
185 depends on X86_32
186 ---help---
187 Select this for a Transmeta Efficeon processor.
188
189config MWINCHIPC6
190 bool "Winchip-C6"
191 depends on X86_32
192 ---help---
193 Select this for an IDT Winchip C6 chip. Linux and GCC
194 treat this chip as a 586TSC with some extended instructions
195 and alignment requirements.
196
197config MWINCHIP3D
198 bool "Winchip-2/Winchip-2A/Winchip-3"
199 depends on X86_32
200 ---help---
201 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
202 treat this chip as a 586TSC with some extended instructions
203 and alignment requirements. Also enable out of order memory
204 stores for this CPU, which can increase performance of some
205 operations.
206
207config MELAN
208 bool "AMD Elan"
209 depends on X86_32
210 ---help---
211 Select this for an AMD Elan processor.
212
213 Do not use this option for K6/Athlon/Opteron processors!
214
215config MGEODEGX1
216 bool "GeodeGX1"
217 depends on X86_32
218 ---help---
219 Select this for a Geode GX1 (Cyrix MediaGX) chip.
220
221config MGEODE_LX
222 bool "Geode GX/LX"
223 depends on X86_32
224 ---help---
225 Select this for AMD Geode GX and LX processors.
226
227config MCYRIXIII
228 bool "CyrixIII/VIA-C3"
229 depends on X86_32
230 ---help---
231 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
232 treat this chip as a generic 586. Whilst the CPU is 686 class,
233 it lacks the cmov extension which gcc assumes is present when
234 generating 686 code.
235 Note that Nehemiah (Model 9) and above will not boot with this
236 kernel due to them lacking the 3DNow! instructions used in earlier
237 incarnations of the CPU.
238
239config MVIAC3_2
240 bool "VIA C3-2 (Nehemiah)"
241 depends on X86_32
242 ---help---
243 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
244 of SSE and tells gcc to treat the CPU as a 686.
245 Note, this kernel will not boot on older (pre model 9) C3s.
246
247config MVIAC7
248 bool "VIA C7"
249 depends on X86_32
250 ---help---
251 Select this for a VIA C7. Selecting this uses the correct cache
252 shift and tells gcc to treat the CPU as a 686.
253
254config MPSC
255 bool "Intel P4 / older Netburst based Xeon"
256 depends on X86_64
257 ---help---
258 Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
259 Xeon CPUs with Intel 64bit which is compatible with x86-64.
260 Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
261 Netburst core and shouldn't use this option. You can distinguish them
262 using the cpu family field
263 in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
264
265config MCORE2
266 bool "Core 2/newer Xeon"
267 ---help---
268
269 Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
270 53xx) CPUs. You can distinguish newer from older Xeons by the CPU
271 family in /proc/cpuinfo. Newer ones have 6 and older ones 15
272 (not a typo)
273
274config MATOM
275 bool "Intel Atom"
276 ---help---
277
278 Select this for the Intel Atom platform. Intel Atom CPUs have an
279 in-order pipelining architecture and thus can benefit from
280 accordingly optimized code. Use a recent GCC with specific Atom
281 support in order to fully benefit from selecting this option.
282
283config GENERIC_CPU
284 bool "Generic-x86-64"
285 depends on X86_64
286 ---help---
287 Generic x86-64 CPU.
288 Run equally well on all x86-64 CPUs.
289
290endchoice
291
292config X86_GENERIC
293 bool "Generic x86 support"
294 depends on X86_32
295 ---help---
296 Instead of just including optimizations for the selected
297 x86 variant (e.g. PII, Crusoe or Athlon), include some more
298 generic optimizations as well. This will make the kernel
299 perform better on x86 CPUs other than that selected.
300
301 This is really intended for distributors who need more
302 generic optimizations.
303
304#
305# Define implied options from the CPU selection here
306config X86_INTERNODE_CACHE_SHIFT
307 int
308 default "12" if X86_VSMP
309 default X86_L1_CACHE_SHIFT
310
311config X86_L1_CACHE_SHIFT
312 int
313 default "7" if MPENTIUM4 || MPSC
314 default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
315 default "4" if MELAN || M486 || MGEODEGX1
316 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
317
318config X86_F00F_BUG
319 def_bool y
320 depends on M586MMX || M586TSC || M586 || M486
321
322config X86_INVD_BUG
323 def_bool y
324 depends on M486
325
326config X86_ALIGNMENT_16
327 def_bool y
328 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
329
330config X86_INTEL_USERCOPY
331 def_bool y
332 depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
333
334config X86_USE_PPRO_CHECKSUM
335 def_bool y
336 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
337
338config X86_USE_3DNOW
339 def_bool y
340 depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
341
342#
343# P6_NOPs are a relatively minor optimization that require a family >=
344# 6 processor, except that it is broken on certain VIA chips.
345# Furthermore, AMD chips prefer a totally different sequence of NOPs
346# (which work on all CPUs). In addition, it looks like Virtual PC
347# does not understand them.
348#
349# As a result, disallow these if we're not compiling for X86_64 (these
350# NOPs do work on all x86-64 capable chips); the list of processors in
351# the right-hand clause are the cores that benefit from this optimization.
352#
353config X86_P6_NOP
354 def_bool y
355 depends on X86_64
356 depends on (MCORE2 || MPENTIUM4 || MPSC)
357
358config X86_TSC
359 def_bool y
360 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
361
362config X86_CMPXCHG64
363 def_bool y
364 depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586TSC || M586MMX || MATOM || MGEODE_LX || MGEODEGX1 || MK6 || MK7 || MK8
365
366# this should be set for all -march=.. options where the compiler
367# generates cmov.
368config X86_CMOV
369 def_bool y
370 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
371
372config X86_MINIMUM_CPU_FAMILY
373 int
374 default "64" if X86_64
375 default "6" if X86_32 && (MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MEFFICEON || MATOM || MCRUSOE || MCORE2 || MK7 || MK8)
376 default "5" if X86_32 && X86_CMPXCHG64
377 default "4"
378
379config X86_DEBUGCTLMSR
380 def_bool y
381 depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486) && !UML
382
383menuconfig PROCESSOR_SELECT
384 bool "Supported processor vendors" if EXPERT
385 ---help---
386 This lets you choose what x86 vendor support code your kernel
387 will include.
388
389config CPU_SUP_INTEL
390 default y
391 bool "Support Intel processors" if PROCESSOR_SELECT
392 ---help---
393 This enables detection, tunings and quirks for Intel processors
394
395 You need this enabled if you want your kernel to run on an
396 Intel CPU. Disabling this option on other types of CPUs
397 makes the kernel a tiny bit smaller. Disabling it on an Intel
398 CPU might render the kernel unbootable.
399
400 If unsure, say N.
401
402config CPU_SUP_CYRIX_32
403 default y
404 bool "Support Cyrix processors" if PROCESSOR_SELECT
405 depends on M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT)
406 ---help---
407 This enables detection, tunings and quirks for Cyrix processors
408
409 You need this enabled if you want your kernel to run on a
410 Cyrix CPU. Disabling this option on other types of CPUs
411 makes the kernel a tiny bit smaller. Disabling it on a Cyrix
412 CPU might render the kernel unbootable.
413
414 If unsure, say N.
415
416config CPU_SUP_AMD
417 default y
418 bool "Support AMD processors" if PROCESSOR_SELECT
419 ---help---
420 This enables detection, tunings and quirks for AMD processors
421
422 You need this enabled if you want your kernel to run on an
423 AMD CPU. Disabling this option on other types of CPUs
424 makes the kernel a tiny bit smaller. Disabling it on an AMD
425 CPU might render the kernel unbootable.
426
427 If unsure, say N.
428
429config CPU_SUP_HYGON
430 default y
431 bool "Support Hygon processors" if PROCESSOR_SELECT
432 select CPU_SUP_AMD
433 help
434 This enables detection, tunings and quirks for Hygon processors
435
436 You need this enabled if you want your kernel to run on an
437 Hygon CPU. Disabling this option on other types of CPUs
438 makes the kernel a tiny bit smaller. Disabling it on an Hygon
439 CPU might render the kernel unbootable.
440
441 If unsure, say N.
442
443config CPU_SUP_CENTAUR
444 default y
445 bool "Support Centaur processors" if PROCESSOR_SELECT
446 ---help---
447 This enables detection, tunings and quirks for Centaur processors
448
449 You need this enabled if you want your kernel to run on a
450 Centaur CPU. Disabling this option on other types of CPUs
451 makes the kernel a tiny bit smaller. Disabling it on a Centaur
452 CPU might render the kernel unbootable.
453
454 If unsure, say N.
455
456config CPU_SUP_TRANSMETA_32
457 default y
458 bool "Support Transmeta processors" if PROCESSOR_SELECT
459 depends on !64BIT
460 ---help---
461 This enables detection, tunings and quirks for Transmeta processors
462
463 You need this enabled if you want your kernel to run on a
464 Transmeta CPU. Disabling this option on other types of CPUs
465 makes the kernel a tiny bit smaller. Disabling it on a Transmeta
466 CPU might render the kernel unbootable.
467
468 If unsure, say N.
469
470config CPU_SUP_UMC_32
471 default y
472 bool "Support UMC processors" if PROCESSOR_SELECT
473 depends on M486 || (EXPERT && !64BIT)
474 ---help---
475 This enables detection, tunings and quirks for UMC processors
476
477 You need this enabled if you want your kernel to run on a
478 UMC CPU. Disabling this option on other types of CPUs
479 makes the kernel a tiny bit smaller. Disabling it on a UMC
480 CPU might render the kernel unbootable.
481
482 If unsure, say N.
483
484config CPU_SUP_ZHAOXIN
485 default y
486 bool "Support Zhaoxin processors" if PROCESSOR_SELECT
487 help
488 This enables detection, tunings and quirks for Zhaoxin processors
489
490 You need this enabled if you want your kernel to run on a
491 Zhaoxin CPU. Disabling this option on other types of CPUs
492 makes the kernel a tiny bit smaller. Disabling it on a Zhaoxin
493 CPU might render the kernel unbootable.
494
495 If unsure, say N.
1# SPDX-License-Identifier: GPL-2.0
2# Put here option for CPU selection and depending optimization
3choice
4 prompt "Processor family"
5 default M686 if X86_32
6 default GENERIC_CPU if X86_64
7 help
8 This is the processor type of your CPU. This information is
9 used for optimizing purposes. In order to compile a kernel
10 that can run on all supported x86 CPU types (albeit not
11 optimally fast), you can specify "486" here.
12
13 Note that the 386 is no longer supported, this includes
14 AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2,
15 UMC 486SX-S and the NexGen Nx586.
16
17 The kernel will not necessarily run on earlier architectures than
18 the one you have chosen, e.g. a Pentium optimized kernel will run on
19 a PPro, but not necessarily on a i486.
20
21 Here are the settings recommended for greatest speed:
22 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
23 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
24 - "586" for generic Pentium CPUs lacking the TSC
25 (time stamp counter) register.
26 - "Pentium-Classic" for the Intel Pentium.
27 - "Pentium-MMX" for the Intel Pentium MMX.
28 - "Pentium-Pro" for the Intel Pentium Pro.
29 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
30 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
31 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
32 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
33 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
34 - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
35 - "Crusoe" for the Transmeta Crusoe series.
36 - "Efficeon" for the Transmeta Efficeon series.
37 - "Winchip-C6" for original IDT Winchip.
38 - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
39 - "AMD Elan" for the 32-bit AMD Elan embedded CPU.
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 - "Intel P4" for the Pentium 4/Netburst microarchitecture.
46 - "Core 2/newer Xeon" for all core2 and newer Intel CPUs.
47 - "Intel Atom" for the Atom-microarchitecture CPUs.
48 - "Generic-x86-64" for a kernel which runs on any x86-64 CPU.
49
50 See each option's help text for additional details. If you don't know
51 what to do, choose "486".
52
53config M486SX
54 bool "486SX"
55 depends on X86_32
56 help
57 Select this for an 486-class CPU without an FPU such as
58 AMD/Cyrix/IBM/Intel SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5S.
59
60config M486
61 bool "486DX"
62 depends on X86_32
63 help
64 Select this for an 486-class CPU such as AMD/Cyrix/IBM/Intel
65 486DX/DX2/DX4 and UMC U5D.
66
67config M586
68 bool "586/K5/5x86/6x86/6x86MX"
69 depends on X86_32
70 help
71 Select this for an 586 or 686 series processor such as the AMD K5,
72 the Cyrix 5x86, 6x86 and 6x86MX. This choice does not
73 assume the RDTSC (Read Time Stamp Counter) instruction.
74
75config M586TSC
76 bool "Pentium-Classic"
77 depends on X86_32
78 help
79 Select this for a Pentium Classic processor with the RDTSC (Read
80 Time Stamp Counter) instruction for benchmarking.
81
82config M586MMX
83 bool "Pentium-MMX"
84 depends on X86_32
85 help
86 Select this for a Pentium with the MMX graphics/multimedia
87 extended instructions.
88
89config M686
90 bool "Pentium-Pro"
91 depends on X86_32
92 help
93 Select this for Intel Pentium Pro chips. This enables the use of
94 Pentium Pro extended instructions, and disables the init-time guard
95 against the f00f bug found in earlier Pentiums.
96
97config MPENTIUMII
98 bool "Pentium-II/Celeron(pre-Coppermine)"
99 depends on X86_32
100 help
101 Select this for Intel chips based on the Pentium-II and
102 pre-Coppermine Celeron core. This option enables an unaligned
103 copy optimization, compiles the kernel with optimization flags
104 tailored for the chip, and applies any applicable Pentium Pro
105 optimizations.
106
107config MPENTIUMIII
108 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
109 depends on X86_32
110 help
111 Select this for Intel chips based on the Pentium-III and
112 Celeron-Coppermine core. This option enables use of some
113 extended prefetch instructions in addition to the Pentium II
114 extensions.
115
116config MPENTIUMM
117 bool "Pentium M"
118 depends on X86_32
119 help
120 Select this for Intel Pentium M (not Pentium-4 M)
121 notebook chips.
122
123config MPENTIUM4
124 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
125 depends on X86_32
126 help
127 Select this for Intel Pentium 4 chips. This includes the
128 Pentium 4, Pentium D, P4-based Celeron and Xeon, and
129 Pentium-4 M (not Pentium M) chips. This option enables compile
130 flags optimized for the chip, uses the correct cache line size, and
131 applies any applicable optimizations.
132
133 CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 )
134
135 Select this for:
136 Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename:
137 -Willamette
138 -Northwood
139 -Mobile Pentium 4
140 -Mobile Pentium 4 M
141 -Extreme Edition (Gallatin)
142 -Prescott
143 -Prescott 2M
144 -Cedar Mill
145 -Presler
146 -Smithfiled
147 Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename:
148 -Foster
149 -Prestonia
150 -Gallatin
151 -Nocona
152 -Irwindale
153 -Cranford
154 -Potomac
155 -Paxville
156 -Dempsey
157
158
159config MK6
160 bool "K6/K6-II/K6-III"
161 depends on X86_32
162 help
163 Select this for an AMD K6-family processor. Enables use of
164 some extended instructions, and passes appropriate optimization
165 flags to GCC.
166
167config MK7
168 bool "Athlon/Duron/K7"
169 depends on X86_32
170 help
171 Select this for an AMD Athlon K7-family processor. Enables use of
172 some extended instructions, and passes appropriate optimization
173 flags to GCC.
174
175config MK8
176 bool "Opteron/Athlon64/Hammer/K8"
177 help
178 Select this for an AMD Opteron or Athlon64 Hammer-family processor.
179 Enables use of some extended instructions, and passes appropriate
180 optimization flags to GCC.
181
182config MCRUSOE
183 bool "Crusoe"
184 depends on X86_32
185 help
186 Select this for a Transmeta Crusoe processor. Treats the processor
187 like a 586 with TSC, and sets some GCC optimization flags (like a
188 Pentium Pro with no alignment requirements).
189
190config MEFFICEON
191 bool "Efficeon"
192 depends on X86_32
193 help
194 Select this for a Transmeta Efficeon processor.
195
196config MWINCHIPC6
197 bool "Winchip-C6"
198 depends on X86_32
199 help
200 Select this for an IDT Winchip C6 chip. Linux and GCC
201 treat this chip as a 586TSC with some extended instructions
202 and alignment requirements.
203
204config MWINCHIP3D
205 bool "Winchip-2/Winchip-2A/Winchip-3"
206 depends on X86_32
207 help
208 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
209 treat this chip as a 586TSC with some extended instructions
210 and alignment requirements. Also enable out of order memory
211 stores for this CPU, which can increase performance of some
212 operations.
213
214config MELAN
215 bool "AMD Elan"
216 depends on X86_32
217 help
218 Select this for an AMD Elan processor.
219
220 Do not use this option for K6/Athlon/Opteron processors!
221
222config MGEODEGX1
223 bool "GeodeGX1"
224 depends on X86_32
225 help
226 Select this for a Geode GX1 (Cyrix MediaGX) chip.
227
228config MGEODE_LX
229 bool "Geode GX/LX"
230 depends on X86_32
231 help
232 Select this for AMD Geode GX and LX processors.
233
234config MCYRIXIII
235 bool "CyrixIII/VIA-C3"
236 depends on X86_32
237 help
238 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
239 treat this chip as a generic 586. Whilst the CPU is 686 class,
240 it lacks the cmov extension which gcc assumes is present when
241 generating 686 code.
242 Note that Nehemiah (Model 9) and above will not boot with this
243 kernel due to them lacking the 3DNow! instructions used in earlier
244 incarnations of the CPU.
245
246config MVIAC3_2
247 bool "VIA C3-2 (Nehemiah)"
248 depends on X86_32
249 help
250 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
251 of SSE and tells gcc to treat the CPU as a 686.
252 Note, this kernel will not boot on older (pre model 9) C3s.
253
254config MVIAC7
255 bool "VIA C7"
256 depends on X86_32
257 help
258 Select this for a VIA C7. Selecting this uses the correct cache
259 shift and tells gcc to treat the CPU as a 686.
260
261config MPSC
262 bool "Intel P4 / older Netburst based Xeon"
263 depends on X86_64
264 help
265 Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
266 Xeon CPUs with Intel 64bit which is compatible with x86-64.
267 Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
268 Netburst core and shouldn't use this option. You can distinguish them
269 using the cpu family field
270 in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
271
272config MCORE2
273 bool "Core 2/newer Xeon"
274 help
275
276 Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
277 53xx) CPUs. You can distinguish newer from older Xeons by the CPU
278 family in /proc/cpuinfo. Newer ones have 6 and older ones 15
279 (not a typo)
280
281config MATOM
282 bool "Intel Atom"
283 help
284
285 Select this for the Intel Atom platform. Intel Atom CPUs have an
286 in-order pipelining architecture and thus can benefit from
287 accordingly optimized code. Use a recent GCC with specific Atom
288 support in order to fully benefit from selecting this option.
289
290config GENERIC_CPU
291 bool "Generic-x86-64"
292 depends on X86_64
293 help
294 Generic x86-64 CPU.
295 Run equally well on all x86-64 CPUs.
296
297endchoice
298
299config X86_GENERIC
300 bool "Generic x86 support"
301 depends on X86_32
302 help
303 Instead of just including optimizations for the selected
304 x86 variant (e.g. PII, Crusoe or Athlon), include some more
305 generic optimizations as well. This will make the kernel
306 perform better on x86 CPUs other than that selected.
307
308 This is really intended for distributors who need more
309 generic optimizations.
310
311#
312# Define implied options from the CPU selection here
313config X86_INTERNODE_CACHE_SHIFT
314 int
315 default "12" if X86_VSMP
316 default X86_L1_CACHE_SHIFT
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 || M486SX || M486 || MGEODEGX1
323 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
324
325config X86_F00F_BUG
326 def_bool y
327 depends on M586MMX || M586TSC || M586 || M486SX || M486
328
329config X86_INVD_BUG
330 def_bool y
331 depends on M486SX || M486
332
333config X86_ALIGNMENT_16
334 def_bool y
335 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486SX || M486 || MVIAC3_2 || MGEODEGX1
336
337config X86_INTEL_USERCOPY
338 def_bool y
339 depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
340
341config X86_USE_PPRO_CHECKSUM
342 def_bool y
343 depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
344
345#
346# P6_NOPs are a relatively minor optimization that require a family >=
347# 6 processor, except that it is broken on certain VIA chips.
348# Furthermore, AMD chips prefer a totally different sequence of NOPs
349# (which work on all CPUs). In addition, it looks like Virtual PC
350# does not understand them.
351#
352# As a result, disallow these if we're not compiling for X86_64 (these
353# NOPs do work on all x86-64 capable chips); the list of processors in
354# the right-hand clause are the cores that benefit from this optimization.
355#
356config X86_P6_NOP
357 def_bool y
358 depends on X86_64
359 depends on (MCORE2 || MPENTIUM4 || MPSC)
360
361config X86_TSC
362 def_bool y
363 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
364
365config X86_CMPXCHG64
366 def_bool y
367 depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586TSC || M586MMX || MATOM || MGEODE_LX || MGEODEGX1 || MK6 || MK7 || MK8
368
369# this should be set for all -march=.. options where the compiler
370# generates cmov.
371config X86_CMOV
372 def_bool y
373 depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
374
375config X86_MINIMUM_CPU_FAMILY
376 int
377 default "64" if X86_64
378 default "6" if X86_32 && (MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MEFFICEON || MATOM || MCRUSOE || MCORE2 || MK7 || MK8)
379 default "5" if X86_32 && X86_CMPXCHG64
380 default "4"
381
382config X86_DEBUGCTLMSR
383 def_bool y
384 depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486SX || M486) && !UML
385
386config IA32_FEAT_CTL
387 def_bool y
388 depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
389
390config X86_VMX_FEATURE_NAMES
391 def_bool y
392 depends on IA32_FEAT_CTL && X86_FEATURE_NAMES
393
394menuconfig PROCESSOR_SELECT
395 bool "Supported processor vendors" if EXPERT
396 help
397 This lets you choose what x86 vendor support code your kernel
398 will include.
399
400config CPU_SUP_INTEL
401 default y
402 bool "Support Intel processors" if PROCESSOR_SELECT
403 help
404 This enables detection, tunings and quirks for Intel processors
405
406 You need this enabled if you want your kernel to run on an
407 Intel CPU. Disabling this option on other types of CPUs
408 makes the kernel a tiny bit smaller. Disabling it on an Intel
409 CPU might render the kernel unbootable.
410
411 If unsure, say N.
412
413config CPU_SUP_CYRIX_32
414 default y
415 bool "Support Cyrix processors" if PROCESSOR_SELECT
416 depends on M486SX || M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT)
417 help
418 This enables detection, tunings and quirks for Cyrix processors
419
420 You need this enabled if you want your kernel to run on a
421 Cyrix CPU. Disabling this option on other types of CPUs
422 makes the kernel a tiny bit smaller. Disabling it on a Cyrix
423 CPU might render the kernel unbootable.
424
425 If unsure, say N.
426
427config CPU_SUP_AMD
428 default y
429 bool "Support AMD processors" if PROCESSOR_SELECT
430 help
431 This enables detection, tunings and quirks for AMD processors
432
433 You need this enabled if you want your kernel to run on an
434 AMD CPU. Disabling this option on other types of CPUs
435 makes the kernel a tiny bit smaller. Disabling it on an AMD
436 CPU might render the kernel unbootable.
437
438 If unsure, say N.
439
440config CPU_SUP_HYGON
441 default y
442 bool "Support Hygon processors" if PROCESSOR_SELECT
443 select CPU_SUP_AMD
444 help
445 This enables detection, tunings and quirks for Hygon processors
446
447 You need this enabled if you want your kernel to run on an
448 Hygon CPU. Disabling this option on other types of CPUs
449 makes the kernel a tiny bit smaller. Disabling it on an Hygon
450 CPU might render the kernel unbootable.
451
452 If unsure, say N.
453
454config CPU_SUP_CENTAUR
455 default y
456 bool "Support Centaur processors" if PROCESSOR_SELECT
457 help
458 This enables detection, tunings and quirks for Centaur processors
459
460 You need this enabled if you want your kernel to run on a
461 Centaur CPU. Disabling this option on other types of CPUs
462 makes the kernel a tiny bit smaller. Disabling it on a Centaur
463 CPU might render the kernel unbootable.
464
465 If unsure, say N.
466
467config CPU_SUP_TRANSMETA_32
468 default y
469 bool "Support Transmeta processors" if PROCESSOR_SELECT
470 depends on !64BIT
471 help
472 This enables detection, tunings and quirks for Transmeta processors
473
474 You need this enabled if you want your kernel to run on a
475 Transmeta CPU. Disabling this option on other types of CPUs
476 makes the kernel a tiny bit smaller. Disabling it on a Transmeta
477 CPU might render the kernel unbootable.
478
479 If unsure, say N.
480
481config CPU_SUP_UMC_32
482 default y
483 bool "Support UMC processors" if PROCESSOR_SELECT
484 depends on M486SX || M486 || (EXPERT && !64BIT)
485 help
486 This enables detection, tunings and quirks for UMC processors
487
488 You need this enabled if you want your kernel to run on a
489 UMC CPU. Disabling this option on other types of CPUs
490 makes the kernel a tiny bit smaller. Disabling it on a UMC
491 CPU might render the kernel unbootable.
492
493 If unsure, say N.
494
495config CPU_SUP_ZHAOXIN
496 default y
497 bool "Support Zhaoxin processors" if PROCESSOR_SELECT
498 help
499 This enables detection, tunings and quirks for Zhaoxin processors
500
501 You need this enabled if you want your kernel to run on a
502 Zhaoxin CPU. Disabling this option on other types of CPUs
503 makes the kernel a tiny bit smaller. Disabling it on a Zhaoxin
504 CPU might render the kernel unbootable.
505
506 If unsure, say N.
507
508config CPU_SUP_VORTEX_32
509 default y
510 bool "Support Vortex processors" if PROCESSOR_SELECT
511 depends on X86_32
512 help
513 This enables detection, tunings and quirks for Vortex processors
514
515 You need this enabled if you want your kernel to run on a
516 Vortex CPU. Disabling this option on other types of CPUs
517 makes the kernel a tiny bit smaller.
518
519 If unsure, say N.