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2 # Put here option for CPU selection and depending optimization
9 used for optimizing purposes. In order to compile a kernel
21 Here are the settings recommended for greatest speed:
22 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
24 - "586" for generic Pentium CPUs lacking the TSC
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 - "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 Atom" for the Atom-microarchitecture CPUs.
46 See each option's help text for additional details. If you don't know
53 Select this for an 486-class CPU without an FPU such as
60 Select this for an 486-class CPU such as AMD/Cyrix/IBM/Intel
67 Select this for an 586 or 686 series processor such as the AMD K5,
75 Select this for a Pentium Classic processor with the RDTSC (Read
76 Time Stamp Counter) instruction for benchmarking.
82 Select this for a Pentium with the MMX graphics/multimedia
89 Select this for Intel Pentium Pro chips. This enables the use of
97 Select this for Intel chips based on the Pentium-II and
100 tailored for the chip, and applies any applicable Pentium Pro
107 Select this for Intel chips based on the Pentium-III and
116 Select this for Intel Pentium M (not Pentium-4 M)
123 Select this for Intel Pentium 4 chips. This includes the
126 flags optimized for the chip, uses the correct cache line size, and
131 Select this for:
147 Select this for an AMD K6-family processor. Enables use of
155 Select this for an AMD Athlon K7-family processor. Enables use of
163 Select this for a Transmeta Crusoe processor. Treats the processor
171 Select this for a Transmeta Efficeon processor.
177 Select this for an IDT Winchip C6 chip. Linux and GCC
185 Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
188 stores for this CPU, which can increase performance of some
195 Select this for an AMD Elan processor.
197 Do not use this option for K6/Athlon/Opteron processors!
203 Select this for a Geode GX1 (Cyrix MediaGX) chip.
209 Select this for AMD Geode GX and LX processors.
215 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
227 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
235 Select this for a VIA C7. Selecting this uses the correct cache
241 Select this for the Intel Atom platform. Intel Atom CPUs have an
259 bool "Build and optimize for local/native CPU"
263 Optimize for the current CPU used to compile the kernel.
264 Use this option if you intend to build the kernel for your
276 Instead of just including optimizations for the selected
281 This is really intended for distributors who need more
330 # this should be set for all -march=.. options where the compiler
369 This enables detection, tunings and quirks for Intel processors
383 This enables detection, tunings and quirks for Cyrix processors
396 This enables detection, tunings and quirks for AMD processors
410 This enables detection, tunings and quirks for Hygon processors
423 This enables detection, tunings and quirks for Centaur processors
437 This enables detection, tunings and quirks for Transmeta processors
451 This enables detection, tunings and quirks for UMC processors
464 This enables detection, tunings and quirks for Zhaoxin processors
478 This enables detection, tunings and quirks for Vortex processors