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+# SPDX-License-Identifier: GPL-2.0
+# Put here option for CPU selection and depending optimization
+choice
+ prompt "Processor family"
+ default M686 if X86_32
+ default GENERIC_CPU if X86_64
+ 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 supported x86 CPU types (albeit not
+ optimally fast), you can specify "486" here.
+
+ Note that the 386 is no longer supported, this includes
+ AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2,
+ UMC 486SX-S and the NexGen Nx586.
+
+ 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:
+ - "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).
+ - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
+ - "Crusoe" for the Transmeta Crusoe series.
+ - "Efficeon" for the Transmeta Efficeon series.
+ - "Winchip-C6" for original IDT Winchip.
+ - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
+ - "AMD Elan" for the 32-bit AMD Elan embedded CPU.
+ - "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.
+ - "Intel P4" for the Pentium 4/Netburst microarchitecture.
+ - "Core 2/newer Xeon" for all core2 and newer Intel CPUs.
+ - "Intel Atom" for the Atom-microarchitecture CPUs.
+ - "Generic-x86-64" for a kernel which runs on any x86-64 CPU.
+
+ See each option's help text for additional details. If you don't know
+ what to do, choose "486".
+
+config M486SX
+ bool "486SX"
+ depends on X86_32
+ help
+ Select this for an 486-class CPU without an FPU such as
+ AMD/Cyrix/IBM/Intel SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5S.
+
+config M486
+ bool "486DX"
+ depends on X86_32
+ help
+ Select this for an 486-class CPU such as AMD/Cyrix/IBM/Intel
+ 486DX/DX2/DX4 and UMC U5D.
+
+config M586
+ bool "586/K5/5x86/6x86/6x86MX"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ help
+ Select this for a Pentium Classic processor with the RDTSC (Read
+ Time Stamp Counter) instruction for benchmarking.
+
+config M586MMX
+ bool "Pentium-MMX"
+ depends on X86_32
+ help
+ Select this for a Pentium with the MMX graphics/multimedia
+ extended instructions.
+
+config M686
+ bool "Pentium-Pro"
+ depends on X86_32
+ 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)"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ help
+ Select this for Intel Pentium M (not Pentium-4 M)
+ notebook chips.
+
+config MPENTIUM4
+ bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
+ depends on X86_32
+ help
+ Select this for Intel Pentium 4 chips. This includes the
+ Pentium 4, Pentium D, 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 line size, and
+ applies any applicable optimizations.
+
+ CPUIDs: F[0-6][1-A] (in /proc/cpuinfo show = cpu family : 15 )
+
+ Select this for:
+ Pentiums (Pentium 4, Pentium D, Celeron, Celeron D) corename:
+ -Willamette
+ -Northwood
+ -Mobile Pentium 4
+ -Mobile Pentium 4 M
+ -Extreme Edition (Gallatin)
+ -Prescott
+ -Prescott 2M
+ -Cedar Mill
+ -Presler
+ -Smithfiled
+ Xeons (Intel Xeon, Xeon MP, Xeon LV, Xeon MV) corename:
+ -Foster
+ -Prestonia
+ -Gallatin
+ -Nocona
+ -Irwindale
+ -Cranford
+ -Potomac
+ -Paxville
+ -Dempsey
+
+
+config MK6
+ bool "K6/K6-II/K6-III"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ help
+ Select this for a Transmeta Efficeon processor.
+
+config MWINCHIPC6
+ bool "Winchip-C6"
+ depends on X86_32
+ 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 MWINCHIP3D
+ bool "Winchip-2/Winchip-2A/Winchip-3"
+ depends on X86_32
+ help
+ Select this for an IDT Winchip-2, 2A or 3. Linux and GCC
+ treat this chip as a 586TSC with some extended instructions
+ and alignment requirements. Also enable out of order memory
+ stores for this CPU, which can increase performance of some
+ operations.
+
+config MELAN
+ bool "AMD Elan"
+ depends on X86_32
+ help
+ Select this for an AMD Elan processor.
+
+ Do not use this option for K6/Athlon/Opteron processors!
+
+config MGEODEGX1
+ bool "GeodeGX1"
+ depends on X86_32
+ help
+ Select this for a Geode GX1 (Cyrix MediaGX) chip.
+
+config MGEODE_LX
+ bool "Geode GX/LX"
+ depends on X86_32
+ help
+ Select this for AMD Geode GX and LX processors.
+
+config MCYRIXIII
+ bool "CyrixIII/VIA-C3"
+ depends on X86_32
+ 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)"
+ depends on X86_32
+ 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"
+ depends on X86_32
+ help
+ Select this for a VIA C7. Selecting this uses the correct cache
+ shift and tells gcc to treat the CPU as a 686.
+
+config MPSC
+ bool "Intel P4 / older Netburst based Xeon"
+ depends on X86_64
+ help
+ Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
+ Xeon CPUs with Intel 64bit which is compatible with x86-64.
+ Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
+ Netburst core and shouldn't use this option. You can distinguish them
+ using the cpu family field
+ in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+
+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 distinguish newer from older Xeons by the CPU
+ family in /proc/cpuinfo. Newer ones have 6 and older ones 15
+ (not a typo)
+
+config MATOM
+ bool "Intel Atom"
+ help
+
+ Select this for the Intel Atom platform. Intel Atom CPUs have an
+ in-order pipelining architecture and thus can benefit from
+ accordingly optimized code. Use a recent GCC with specific Atom
+ support in order to fully benefit from selecting this option.
+
+config GENERIC_CPU
+ bool "Generic-x86-64"
+ depends on X86_64
+ help
+ Generic x86-64 CPU.
+ Run equally well on all x86-64 CPUs.
+
+endchoice
+
+config X86_GENERIC
+ bool "Generic x86 support"
+ depends on X86_32
+ 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.
+
+#
+# Define implied options from the CPU selection here
+config X86_INTERNODE_CACHE_SHIFT
+ int
+ default "12" if X86_VSMP
+ default X86_L1_CACHE_SHIFT
+
+config X86_L1_CACHE_SHIFT
+ int
+ default "7" if MPENTIUM4 || MPSC
+ default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
+ default "4" if MELAN || M486SX || M486 || MGEODEGX1
+ default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+
+config X86_F00F_BUG
+ def_bool y
+ depends on M586MMX || M586TSC || M586 || M486SX || M486
+
+config X86_INVD_BUG
+ def_bool y
+ depends on M486SX || M486
+
+config X86_ALIGNMENT_16
+ def_bool y
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486SX || M486 || MVIAC3_2 || MGEODEGX1
+
+config X86_INTEL_USERCOPY
+ def_bool y
+ depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
+
+config X86_USE_PPRO_CHECKSUM
+ def_bool y
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MATOM
+
+#
+# P6_NOPs are a relatively minor optimization that require a family >=
+# 6 processor, except that it is broken on certain VIA chips.
+# Furthermore, AMD chips prefer a totally different sequence of NOPs
+# (which work on all CPUs). In addition, it looks like Virtual PC
+# does not understand them.
+#
+# As a result, disallow these if we're not compiling for X86_64 (these
+# NOPs do work on all x86-64 capable chips); the list of processors in
+# the right-hand clause are the cores that benefit from this optimization.
+#
+config X86_P6_NOP
+ def_bool y
+ depends on X86_64
+ depends on (MCORE2 || MPENTIUM4 || MPSC)
+
+config X86_TSC
+ def_bool y
+ 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
+
+config X86_CMPXCHG64
+ def_bool y
+ depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586TSC || M586MMX || MATOM || MGEODE_LX || MGEODEGX1 || MK6 || MK7 || MK8
+
+# this should be set for all -march=.. options where the compiler
+# generates cmov.
+config X86_CMOV
+ def_bool y
+ depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MATOM || MGEODE_LX)
+
+config X86_MINIMUM_CPU_FAMILY
+ int
+ default "64" if X86_64
+ default "6" if X86_32 && (MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MEFFICEON || MATOM || MCRUSOE || MCORE2 || MK7 || MK8)
+ default "5" if X86_32 && X86_CMPXCHG64
+ default "4"
+
+config X86_DEBUGCTLMSR
+ def_bool y
+ depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486SX || M486) && !UML
+
+config IA32_FEAT_CTL
+ def_bool y
+ depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
+
+config X86_VMX_FEATURE_NAMES
+ def_bool y
+ depends on IA32_FEAT_CTL && X86_FEATURE_NAMES
+
+menuconfig PROCESSOR_SELECT
+ bool "Supported processor vendors" if EXPERT
+ help
+ This lets you choose what x86 vendor support code your kernel
+ will include.
+
+config CPU_SUP_INTEL
+ default y
+ bool "Support Intel processors" if PROCESSOR_SELECT
+ help
+ This enables detection, tunings and quirks for Intel processors
+
+ You need this enabled if you want your kernel to run on an
+ Intel CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on an Intel
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_CYRIX_32
+ default y
+ bool "Support Cyrix processors" if PROCESSOR_SELECT
+ depends on M486SX || M486 || M586 || M586TSC || M586MMX || (EXPERT && !64BIT)
+ help
+ This enables detection, tunings and quirks for Cyrix processors
+
+ You need this enabled if you want your kernel to run on a
+ Cyrix CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on a Cyrix
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_AMD
+ default y
+ bool "Support AMD processors" if PROCESSOR_SELECT
+ help
+ This enables detection, tunings and quirks for AMD processors
+
+ You need this enabled if you want your kernel to run on an
+ AMD CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on an AMD
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_HYGON
+ default y
+ bool "Support Hygon processors" if PROCESSOR_SELECT
+ select CPU_SUP_AMD
+ help
+ This enables detection, tunings and quirks for Hygon processors
+
+ You need this enabled if you want your kernel to run on an
+ Hygon CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on an Hygon
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_CENTAUR
+ default y
+ bool "Support Centaur processors" if PROCESSOR_SELECT
+ help
+ This enables detection, tunings and quirks for Centaur processors
+
+ You need this enabled if you want your kernel to run on a
+ Centaur CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on a Centaur
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_TRANSMETA_32
+ default y
+ bool "Support Transmeta processors" if PROCESSOR_SELECT
+ depends on !64BIT
+ help
+ This enables detection, tunings and quirks for Transmeta processors
+
+ You need this enabled if you want your kernel to run on a
+ Transmeta CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on a Transmeta
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_UMC_32
+ default y
+ bool "Support UMC processors" if PROCESSOR_SELECT
+ depends on M486SX || M486 || (EXPERT && !64BIT)
+ help
+ This enables detection, tunings and quirks for UMC processors
+
+ You need this enabled if you want your kernel to run on a
+ UMC CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on a UMC
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_ZHAOXIN
+ default y
+ bool "Support Zhaoxin processors" if PROCESSOR_SELECT
+ help
+ This enables detection, tunings and quirks for Zhaoxin processors
+
+ You need this enabled if you want your kernel to run on a
+ Zhaoxin CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller. Disabling it on a Zhaoxin
+ CPU might render the kernel unbootable.
+
+ If unsure, say N.
+
+config CPU_SUP_VORTEX_32
+ default y
+ bool "Support Vortex processors" if PROCESSOR_SELECT
+ depends on X86_32
+ help
+ This enables detection, tunings and quirks for Vortex processors
+
+ You need this enabled if you want your kernel to run on a
+ Vortex CPU. Disabling this option on other types of CPUs
+ makes the kernel a tiny bit smaller.
+
+ If unsure, say N.