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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	---help---
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,
14	  UMC 486SX-S and the NexGen Nx586.
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	  - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
22	    SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
23	  - "586" for generic Pentium CPUs lacking the TSC
24	    (time stamp counter) register.
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).
33	  - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
34	  - "Crusoe" for the Transmeta Crusoe series.
35	  - "Efficeon" for the Transmeta Efficeon series.
36	  - "Winchip-C6" for original IDT Winchip.
37	  - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
38	  - "AMD Elan" for the 32-bit AMD Elan embedded CPU.
39	  - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
40	  - "Geode GX/LX" For AMD Geode GX and LX processors.
41	  - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
42	  - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above).
43	  - "VIA C7" for VIA C7.
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".
51
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.
58
59config M586
60	bool "586/K5/5x86/6x86/6x86MX"
61	depends on X86_32
62	---help---
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"
69	depends on X86_32
70	---help---
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"
76	depends on X86_32
77	---help---
78	  Select this for a Pentium with the MMX graphics/multimedia
79	  extended instructions.
80
81config M686
82	bool "Pentium-Pro"
83	depends on X86_32
84	---help---
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)"
91	depends on X86_32
92	---help---
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"
101	depends on X86_32
102	---help---
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"
110	depends on X86_32
111	---help---
112	  Select this for Intel Pentium M (not Pentium-4 M)
113	  notebook chips.
114
115config MPENTIUM4
116	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
117	depends on X86_32
118	---help---
119	  Select this for Intel Pentium 4 chips.  This includes the
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
150
151config MK6
152	bool "K6/K6-II/K6-III"
153	depends on X86_32
154	---help---
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"
161	depends on X86_32
162	---help---
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"
169	---help---
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.
173
174config MCRUSOE
175	bool "Crusoe"
176	depends on X86_32
177	---help---
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"
184	depends on X86_32
185	---help---
186	  Select this for a Transmeta Efficeon processor.
187
188config MWINCHIPC6
189	bool "Winchip-C6"
190	depends on X86_32
191	---help---
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
196config MWINCHIP3D
197	bool "Winchip-2/Winchip-2A/Winchip-3"
198	depends on X86_32
199	---help---
200	  Select this for an IDT Winchip-2, 2A or 3.  Linux and GCC
201	  treat this chip as a 586TSC with some extended instructions
202	  and alignment requirements.  Also enable out of order memory
203	  stores for this CPU, which can increase performance of some
204	  operations.
205
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
214config MGEODEGX1
215	bool "GeodeGX1"
216	depends on X86_32
217	---help---
218	  Select this for a Geode GX1 (Cyrix MediaGX) chip.
219
220config MGEODE_LX
221	bool "Geode GX/LX"
222	depends on X86_32
223	---help---
224	  Select this for AMD Geode GX and LX processors.
225
226config MCYRIXIII
227	bool "CyrixIII/VIA-C3"
228	depends on X86_32
229	---help---
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)"
240	depends on X86_32
241	---help---
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
246config MVIAC7
247	bool "VIA C7"
248	depends on X86_32
249	---help---
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
253config MPSC
254	bool "Intel P4 / older Netburst based Xeon"
255	depends on X86_64
256	---help---
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
260	  Netburst core and shouldn't use this option. You can distinguish them
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"
266	---help---
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)
272
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
282config GENERIC_CPU
283	bool "Generic-x86-64"
284	depends on X86_64
285	---help---
286	  Generic x86-64 CPU.
287	  Run equally well on all x86-64 CPUs.
288
289endchoice
290
291config X86_GENERIC
292	bool "Generic x86 support"
293	depends on X86_32
294	---help---
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
303#
304# Define implied options from the CPU selection here
305config X86_INTERNODE_CACHE_SHIFT
306	int
307	default "12" if X86_VSMP
308	default X86_L1_CACHE_SHIFT
309
310config X86_L1_CACHE_SHIFT
311	int
312	default "7" if MPENTIUM4 || MPSC
313	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
314	default "4" if MELAN || M486 || MGEODEGX1
315	default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
316
317config X86_PPRO_FENCE
318	bool "PentiumPro memory ordering errata workaround"
319	depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1
320	---help---
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)
324	  occurrences of this problem, at the cost of much heavier spinlock and
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.
329
330config X86_F00F_BUG
331	def_bool y
332	depends on M586MMX || M586TSC || M586 || M486
333
334config X86_INVD_BUG
335	def_bool y
336	depends on M486
337
338config X86_ALIGNMENT_16
339	def_bool y
340	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
341
342config X86_INTEL_USERCOPY
343	def_bool y
344	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
345
346config X86_USE_PPRO_CHECKSUM
347	def_bool y
348	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
349
350config X86_USE_3DNOW
351	def_bool y
352	depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
353
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
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.
364#
365config X86_P6_NOP
366	def_bool y
367	depends on X86_64
368	depends on (MCORE2 || MPENTIUM4 || MPSC)
369
370config X86_TSC
371	def_bool y
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
373
374config X86_CMPXCHG64
375	def_bool y
376	depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM
377
378# this should be set for all -march=.. options where the compiler
379# generates cmov.
380config X86_CMOV
381	def_bool y
382	depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
383
384config X86_MINIMUM_CPU_FAMILY
385	int
386	default "64" if X86_64
387	default "6" if X86_32 && X86_P6_NOP
388	default "5" if X86_32 && X86_CMPXCHG64
389	default "4"
390
391config X86_DEBUGCTLMSR
392	def_bool y
393	depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486) && !UML
394
395menuconfig PROCESSOR_SELECT
396	bool "Supported processor vendors" if EXPERT
397	---help---
398	  This lets you choose what x86 vendor support code your kernel
399	  will include.
400
401config CPU_SUP_INTEL
402	default y
403	bool "Support Intel processors" if PROCESSOR_SELECT
404	---help---
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.
413
414config CPU_SUP_CYRIX_32
415	default y
416	bool "Support Cyrix processors" if PROCESSOR_SELECT
417	depends on M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT)
418	---help---
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.
427
428config CPU_SUP_AMD
429	default y
430	bool "Support AMD processors" if PROCESSOR_SELECT
431	---help---
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.
440
441config CPU_SUP_CENTAUR
442	default y
443	bool "Support Centaur processors" if PROCESSOR_SELECT
444	---help---
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.
453
454config CPU_SUP_TRANSMETA_32
455	default y
456	bool "Support Transmeta processors" if PROCESSOR_SELECT
457	depends on !64BIT
458	---help---
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.
467
468config CPU_SUP_UMC_32
469	default y
470	bool "Support UMC processors" if PROCESSOR_SELECT
471	depends on M486 || (EXPERT && !64BIT)
472	---help---
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.
481