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