# 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
+ prompt "x86-32 Processor family"
+ depends on X86_32
+ default M686
help
This is the processor type of your CPU. This information is
used for optimizing purposes. In order to compile a kernel
- "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.
- "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".
+ what to do, choose "Pentium-Pro".
config M486SX
bool "486SX"
extensions.
config MPENTIUMM
- bool "Pentium M"
+ bool "Pentium M/Pentium Dual Core/Core Solo/Core Duo"
depends on X86_32
help
Select this for Intel Pentium M (not Pentium-4 M)
- notebook chips.
+ "Merom" Core Solo/Duo notebook chips
config MPENTIUM4
bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
-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"
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
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
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 "7" if MPENTIUM4
+ default "6" if MK7 || MPENTIUMM || MATOM || MVIAC7 || X86_GENERIC || X86_64
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_INTEL_USERCOPY
def_bool y
- depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2
+ depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK7 || MEFFICEON
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)
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MATOM
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
+ depends on (MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MATOM) || X86_64
config X86_HAVE_PAE
def_bool y
- depends on MCRUSOE || MEFFICEON || MCYRIXIII || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC7 || MCORE2 || MATOM || X86_64
+ depends on MCRUSOE || MEFFICEON || MCYRIXIII || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC7 || MATOM || X86_64
config X86_CMPXCHG64
def_bool y
# 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)
+ depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || MATOM || MGEODE_LX || X86_64)
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 || MCORE2 || MK7 || MK8)
+ default "6" if X86_32 && (MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MEFFICEON || MATOM || MK7)
default "5" if X86_32 && X86_CMPXCHG64
default "4"
# Use -mskip-rax-setup if supported.
KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
- # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
- cflags-$(CONFIG_MK8) += -march=k8
- cflags-$(CONFIG_MPSC) += -march=nocona
- cflags-$(CONFIG_MCORE2) += -march=core2
- cflags-$(CONFIG_MATOM) += -march=atom
- cflags-$(CONFIG_GENERIC_CPU) += -march=x86-64 -mtune=generic
- KBUILD_CFLAGS += $(cflags-y)
-
- rustflags-$(CONFIG_MK8) += -Ctarget-cpu=k8
- rustflags-$(CONFIG_MPSC) += -Ctarget-cpu=nocona
- rustflags-$(CONFIG_MCORE2) += -Ctarget-cpu=core2
- rustflags-$(CONFIG_MATOM) += -Ctarget-cpu=atom
- rustflags-$(CONFIG_GENERIC_CPU) += -Ctarget-cpu=x86-64 -Ztune-cpu=generic
- KBUILD_RUSTFLAGS += $(rustflags-y)
+ KBUILD_CFLAGS += -march=x86-64 -mtune=generic
+ KBUILD_RUSTFLAGS += -Ctarget-cpu=x86-64 -Ztune-cpu=generic
KBUILD_CFLAGS += -mno-red-zone
KBUILD_CFLAGS += -mcmodel=kernel
# Please note, that patches that add -march=athlon-xp and friends are pointless.
# They make zero difference whatsosever to performance at this time.
cflags-$(CONFIG_MK7) += -march=athlon
-cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon)
cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)
cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)
cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)
cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686)
cflags-$(CONFIG_MVIAC7) += -march=i686
-cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2)
-cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \
- $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
+cflags-$(CONFIG_MATOM) += -march=atom
# AMD Elan support
cflags-$(CONFIG_MELAN) += -march=i486
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