# Put here option for CPU selection and depending optimization if !X86_ELAN choice prompt "Processor family" default M686 config M386 bool "386" depends on !UML ---help--- This is the processor type of your CPU. This information is used for optimizing purposes. In order to compile a kernel that can run on all x86 CPU types (albeit not optimally fast), you can specify "386" here. The kernel will not necessarily run on earlier architectures than the one you have chosen, e.g. a Pentium optimized kernel will run on a PPro, but not necessarily on a i486. Here are the settings recommended for greatest speed: - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels will run on a 386 class machine. - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S. - "586" for generic Pentium CPUs lacking the TSC (time stamp counter) register. - "Pentium-Classic" for the Intel Pentium. - "Pentium-MMX" for the Intel Pentium MMX. - "Pentium-Pro" for the Intel Pentium Pro. - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron. - "Pentium-III" for the Intel Pentium III or Coppermine Celeron. - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron. - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D). - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird). - "Crusoe" for the Transmeta Crusoe series. - "Efficeon" for the Transmeta Efficeon series. - "Winchip-C6" for original IDT Winchip. - "Winchip-2" for IDT Winchip 2. - "Winchip-2A" for IDT Winchips with 3dNow! capabilities. - "GeodeGX1" for Geode GX1 (Cyrix MediaGX). - "Geode GX/LX" For AMD Geode GX and LX processors. - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3. - "VIA C3-2" for VIA C3-2 "Nehemiah" (model 9 and above). - "VIA C7" for VIA C7. If you don't know what to do, choose "386". config M486 bool "486" help Select this for a 486 series processor, either Intel or one of the compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX, DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S. config M586 bool "586/K5/5x86/6x86/6x86MX" help Select this for an 586 or 686 series processor such as the AMD K5, the Cyrix 5x86, 6x86 and 6x86MX. This choice does not assume the RDTSC (Read Time Stamp Counter) instruction. config M586TSC bool "Pentium-Classic" help Select this for a Pentium Classic processor with the RDTSC (Read Time Stamp Counter) instruction for benchmarking. config M586MMX bool "Pentium-MMX" help Select this for a Pentium with the MMX graphics/multimedia extended instructions. config M686 bool "Pentium-Pro" help Select this for Intel Pentium Pro chips. This enables the use of Pentium Pro extended instructions, and disables the init-time guard against the f00f bug found in earlier Pentiums. config MPENTIUMII bool "Pentium-II/Celeron(pre-Coppermine)" help Select this for Intel chips based on the Pentium-II and pre-Coppermine Celeron core. This option enables an unaligned copy optimization, compiles the kernel with optimization flags tailored for the chip, and applies any applicable Pentium Pro optimizations. config MPENTIUMIII bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon" help Select this for Intel chips based on the Pentium-III and Celeron-Coppermine core. This option enables use of some extended prefetch instructions in addition to the Pentium II extensions. config MPENTIUMM bool "Pentium M" help Select this for Intel Pentium M (not Pentium-4 M) notebook chips. config MCORE2 bool "Core 2/newer Xeon" help Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx) CPUs. You can distingush newer from older Xeons by the CPU family in /proc/cpuinfo. Newer ones have 6. config MPENTIUM4 bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon" help Select this for Intel Pentium 4 chips. This includes the Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M (not Pentium M) chips. This option enables compile flags optimized for the chip, uses the correct cache shift, and applies any applicable Pentium III optimizations. config MK6 bool "K6/K6-II/K6-III" help Select this for an AMD K6-family processor. Enables use of some extended instructions, and passes appropriate optimization flags to GCC. config MK7 bool "Athlon/Duron/K7" help Select this for an AMD Athlon K7-family processor. Enables use of some extended instructions, and passes appropriate optimization flags to GCC. config MK8 bool "Opteron/Athlon64/Hammer/K8" help Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables use of some extended instructions, and passes appropriate optimization flags to GCC. config MCRUSOE bool "Crusoe" help Select this for a Transmeta Crusoe processor. Treats the processor like a 586 with TSC, and sets some GCC optimization flags (like a Pentium Pro with no alignment requirements). config MEFFICEON bool "Efficeon" help Select this for a Transmeta Efficeon processor. config MWINCHIPC6 bool "Winchip-C6" help Select this for an IDT Winchip C6 chip. Linux and GCC treat this chip as a 586TSC with some extended instructions and alignment requirements. config MWINCHIP2 bool "Winchip-2" help Select this for an IDT Winchip-2. Linux and GCC treat this chip as a 586TSC with some extended instructions and alignment requirements. config MWINCHIP3D bool "Winchip-2A/Winchip-3" help Select this for an IDT Winchip-2A or 3. Linux and GCC treat this chip as a 586TSC with some extended instructions and alignment reqirements. Also enable out of order memory stores for this CPU, which can increase performance of some operations. config MGEODEGX1 bool "GeodeGX1" help Select this for a Geode GX1 (Cyrix MediaGX) chip. config MGEODE_LX bool "Geode GX/LX" help Select this for AMD Geode GX and LX processors. config MCYRIXIII bool "CyrixIII/VIA-C3" help Select this for a Cyrix III or C3 chip. Presently Linux and GCC treat this chip as a generic 586. Whilst the CPU is 686 class, it lacks the cmov extension which gcc assumes is present when generating 686 code. Note that Nehemiah (Model 9) and above will not boot with this kernel due to them lacking the 3DNow! instructions used in earlier incarnations of the CPU. config MVIAC3_2 bool "VIA C3-2 (Nehemiah)" help Select this for a VIA C3 "Nehemiah". Selecting this enables usage of SSE and tells gcc to treat the CPU as a 686. Note, this kernel will not boot on older (pre model 9) C3s. config MVIAC7 bool "VIA C7" help Select this for a VIA C7. Selecting this uses the correct cache shift and tells gcc to treat the CPU as a 686. endchoice config X86_GENERIC bool "Generic x86 support" help Instead of just including optimizations for the selected x86 variant (e.g. PII, Crusoe or Athlon), include some more generic optimizations as well. This will make the kernel perform better on x86 CPUs other than that selected. This is really intended for distributors who need more generic optimizations. endif # # Define implied options from the CPU selection here # config X86_CMPXCHG bool depends on !M386 default y config X86_L1_CACHE_SHIFT int default "7" if MPENTIUM4 || X86_GENERIC default "4" if X86_ELAN || M486 || M386 || MGEODEGX1 default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7 config X86_XADD bool depends on !M386 default y config RWSEM_GENERIC_SPINLOCK bool depends on !X86_XADD default y config RWSEM_XCHGADD_ALGORITHM bool depends on X86_XADD default y config ARCH_HAS_ILOG2_U32 bool default n config ARCH_HAS_ILOG2_U64 bool default n config GENERIC_CALIBRATE_DELAY bool default y config X86_PPRO_FENCE bool depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1 default y config X86_F00F_BUG bool depends on M586MMX || M586TSC || M586 || M486 || M386 default y config X86_WP_WORKS_OK bool depends on !M386 default y config X86_INVLPG bool depends on !M386 default y config X86_BSWAP bool depends on !M386 default y config X86_POPAD_OK bool depends on !M386 default y config X86_CMPXCHG64 bool depends on !M386 && !M486 default y config X86_ALIGNMENT_16 bool depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 default y config X86_GOOD_APIC bool depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2 || MVIAC7 default y config X86_INTEL_USERCOPY bool depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 default y config X86_USE_PPRO_CHECKSUM bool depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2 default y config X86_USE_3DNOW bool depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML default y config X86_OOSTORE bool depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR default y config X86_TSC bool depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ default y # this should be set for all -march=.. options where the compiler # generates cmov. config X86_CMOV bool depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7) default y config X86_MINIMUM_CPU_MODEL int default "4" if X86_XADD || X86_CMPXCHG || X86_BSWAP default "0"