arch/x86/Kconfig.cpu - kernel/msm-4.9 - Gitiles

 # Put here option for CPU selection and depending optimization
 if !X86_ELAN

 choice
 	prompt "Processor family"
 	default M686 if X86_32
 	default GENERIC_CPU if X86_64

 config M386
 	bool "386"
 	depends on X86_32 && !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, and UMC 486SX-S.  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 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"
 	depends on X86_32
 	---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"
 	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 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 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.

 endif

 config X86_CPU
 	def_bool y
 	select GENERIC_FIND_FIRST_BIT
 	select GENERIC_FIND_NEXT_BIT

 #
 # Define implied options from the CPU selection here
 config X86_L1_CACHE_BYTES
 	int
 	default "128" if MPSC
 	default "64" if GENERIC_CPU || MK8 || MCORE2 || X86_32

 config X86_INTERNODE_CACHE_BYTES
 	int
 	default "4096" if X86_VSMP
 	default X86_L1_CACHE_BYTES if !X86_VSMP

 config X86_CMPXCHG
 	def_bool X86_64 || (X86_32 && !M386)

 config X86_L1_CACHE_SHIFT
 	int
 	default "7" if MPENTIUM4 || MPSC
 	default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
 	default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
 	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7 || X86_GENERIC || GENERIC_CPU

 config X86_XADD
 	def_bool y
 	depends on X86_32 && !M386

 config X86_PPRO_FENCE
 	bool "PentiumPro memory ordering errata workaround"
 	depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1
 	---help---
 	  Old PentiumPro multiprocessor systems had errata that could cause
 	  memory operations to violate the x86 ordering standard in rare cases.
 	  Enabling this option will attempt to work around some (but not all)
 	  occurances of this problem, at the cost of much heavier spinlock and
 	  memory barrier operations.

 	  If unsure, say n here. Even distro kernels should think twice before
 	  enabling this: there are few systems, and an unlikely bug.

 config X86_F00F_BUG
 	def_bool y
 	depends on M586MMX || M586TSC || M586 || M486 || M386

 config X86_WP_WORKS_OK
 	def_bool y
 	depends on !M386

 config X86_INVLPG
 	def_bool y
 	depends on X86_32 && !M386

 config X86_BSWAP
 	def_bool y
 	depends on X86_32 && !M386

 config X86_POPAD_OK
 	def_bool y
 	depends on X86_32 && !M386

 config X86_ALIGNMENT_16
 	def_bool y
 	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || 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 || MEFFICEON || MGEODE_LX || MCORE2

 config X86_USE_3DNOW
 	def_bool y
 	depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML

 config X86_OOSTORE
 	def_bool y
 	depends on (MWINCHIP3D || MWINCHIPC6) && MTRR

 #
 # 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) && !X86_NUMAQ) || X86_64

 config X86_CMPXCHG64
 	def_bool y
 	depends on X86_PAE || X86_64

 # 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)

 config X86_MINIMUM_CPU_FAMILY
 	int
 	default "64" if X86_64
 	default "6" if X86_32 && X86_P6_NOP
 	default "4" if X86_32 && (X86_XADD || X86_CMPXCHG || X86_BSWAP || X86_WP_WORKS_OK)
 	default "3"

 config X86_DEBUGCTLMSR
 	def_bool y
 	depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386) && !UML

 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EMBEDDED
 	---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 !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_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 !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 X86_DS
 	def_bool X86_PTRACE_BTS
 	depends on X86_DEBUGCTLMSR
 	select HAVE_HW_BRANCH_TRACER

 config X86_PTRACE_BTS
 	bool "Branch Trace Store"
 	default y
 	depends on X86_DEBUGCTLMSR
 	depends on BROKEN
 	---help---
 	  This adds a ptrace interface to the hardware's branch trace store.

 	  Debuggers may use it to collect an execution trace of the debugged
 	  application in order to answer the question 'how did I get here?'.
 	  Debuggers may trace user mode as well as kernel mode.

 	  Say Y unless there is no application development on this machine
 	  and you want to save a small amount of code size.
	# Put here option for CPU selection and depending optimization
	if !X86_ELAN

	choice
	prompt "Processor family"
	default M686 if X86_32
	default GENERIC_CPU if X86_64

	config M386
	bool "386"
	depends on X86_32 && !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, and UMC 486SX-S. 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 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"
	depends on X86_32
	---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"
	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 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 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.

	endif

	config X86_CPU
	def_bool y
	select GENERIC_FIND_FIRST_BIT
	select GENERIC_FIND_NEXT_BIT

	#
	# Define implied options from the CPU selection here
	config X86_L1_CACHE_BYTES
	int
	default "128" if MPSC
	default "64" if GENERIC_CPU \|\| MK8 \|\| MCORE2 \|\| X86_32

	config X86_INTERNODE_CACHE_BYTES
	int
	default "4096" if X86_VSMP
	default X86_L1_CACHE_BYTES if !X86_VSMP

	config X86_CMPXCHG
	def_bool X86_64 \|\| (X86_32 && !M386)

	config X86_L1_CACHE_SHIFT
	int
	default "7" if MPENTIUM4 \|\| MPSC
	default "4" if X86_ELAN \|\| M486 \|\| M386 \|\| MGEODEGX1
	default "5" if MWINCHIP3D \|\| MWINCHIPC6 \|\| MCRUSOE \|\| MEFFICEON \|\| MCYRIXIII \|\| MK6 \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M686 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| MVIAC3_2 \|\| MGEODE_LX
	default "6" if MK7 \|\| MK8 \|\| MPENTIUMM \|\| MCORE2 \|\| MVIAC7 \|\| X86_GENERIC \|\| GENERIC_CPU

	config X86_XADD
	def_bool y
	depends on X86_32 && !M386

	config X86_PPRO_FENCE
	bool "PentiumPro memory ordering errata workaround"
	depends on M686 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| M386 \|\| MGEODEGX1
	---help---
	Old PentiumPro multiprocessor systems had errata that could cause
	memory operations to violate the x86 ordering standard in rare cases.
	Enabling this option will attempt to work around some (but not all)
	occurances of this problem, at the cost of much heavier spinlock and
	memory barrier operations.

	If unsure, say n here. Even distro kernels should think twice before
	enabling this: there are few systems, and an unlikely bug.

	config X86_F00F_BUG
	def_bool y
	depends on M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| M386

	config X86_WP_WORKS_OK
	def_bool y
	depends on !M386

	config X86_INVLPG
	def_bool y
	depends on X86_32 && !M386

	config X86_BSWAP
	def_bool y
	depends on X86_32 && !M386

	config X86_POPAD_OK
	def_bool y
	depends on X86_32 && !M386

	config X86_ALIGNMENT_16
	def_bool y
	depends on MWINCHIP3D \|\| MWINCHIPC6 \|\| MCYRIXIII \|\| X86_ELAN \|\| MK6 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| 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 \|\| MEFFICEON \|\| MGEODE_LX \|\| MCORE2

	config X86_USE_3DNOW
	def_bool y
	depends on (MCYRIXIII \|\| MK7 \|\| MGEODE_LX) && !UML

	config X86_OOSTORE
	def_bool y
	depends on (MWINCHIP3D \|\| MWINCHIPC6) && MTRR

	#
	# 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) && !X86_NUMAQ) \|\| X86_64

	config X86_CMPXCHG64
	def_bool y
	depends on X86_PAE \|\| X86_64

	# 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)

	config X86_MINIMUM_CPU_FAMILY
	int
	default "64" if X86_64
	default "6" if X86_32 && X86_P6_NOP
	default "4" if X86_32 && (X86_XADD \|\| X86_CMPXCHG \|\| X86_BSWAP \|\| X86_WP_WORKS_OK)
	default "3"

	config X86_DEBUGCTLMSR
	def_bool y
	depends on !(MK6 \|\| MWINCHIPC6 \|\| MWINCHIP3D \|\| MCYRIXIII \|\| M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| M386) && !UML

	menuconfig PROCESSOR_SELECT
	bool "Supported processor vendors" if EMBEDDED
	---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 !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_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 !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 X86_DS
	def_bool X86_PTRACE_BTS
	depends on X86_DEBUGCTLMSR
	select HAVE_HW_BRANCH_TRACER

	config X86_PTRACE_BTS
	bool "Branch Trace Store"
	default y
	depends on X86_DEBUGCTLMSR
	depends on BROKEN
	---help---
	This adds a ptrace interface to the hardware's branch trace store.

	Debuggers may use it to collect an execution trace of the debugged
	application in order to answer the question 'how did I get here?'.
	Debuggers may trace user mode as well as kernel mode.

	Say Y unless there is no application development on this machine
	and you want to save a small amount of code size.