WARNING
This patch works with gcc versions 4.9+ and with kernel version 3.15+ and should
NOT be applied when compiling on older versions of gcc due to key name changes
of the march flags introduced with the version 4.9 release of gcc.[1]
Use the older version of this patch hosted on the same github for older
versions of gcc.
FEATURES
This patch adds additional CPU options to the Linux kernel accessible under:
Processor type and features --->
Processor family --->
The expanded microarchitectures include:
* AMD Improved K8-family
* AMD K10-family
* AMD Family 10h (Barcelona)
* AMD Family 14h (Bobcat)
* AMD Family 16h (Jaguar)
* AMD Family 15h (Bulldozer)
* AMD Family 15h (Piledriver)
* AMD Family 15h (Steamroller)
* AMD Family 15h (Excavator)
* AMD Family 17h (Zen)
* Intel Silvermont low-power processors
* Intel 1st Gen Core i3/i5/i7 (Nehalem)
* Intel 1.5 Gen Core i3/i5/i7 (Westmere)
* Intel 2nd Gen Core i3/i5/i7 (Sandybridge)
* Intel 3rd Gen Core i3/i5/i7 (Ivybridge)
* Intel 4th Gen Core i3/i5/i7 (Haswell)
* Intel 5th Gen Core i3/i5/i7 (Broadwell)
* Intel 6th Gen Core i3/i5.i7 (Skylake)
It also offers to compile passing the 'native' option which, "selects the CPU
to generate code for at compilation time by determining the processor type of
the compiling machine. Using -march=native enables all instruction subsets
supported by the local machine and will produce code optimized for the local
machine under the constraints of the selected instruction set."[3]
MINOR NOTES
This patch also changes 'atom' to 'bonnell' in accordance with the gcc v4.9
changes. Note that upstream is using the deprecated 'match=atom' flags when I
believe it should use the newer 'march=bonnell' flag for atom processors.[2]
It is not recommended to compile on Atom-CPUs with the 'native' option.[4] The
recommendation is to use the 'atom' option instead.
BENEFITS
Small but real speed increases are measurable using a make endpoint comparing
a generic kernel to one built with one of the respective microarchs.
See the following experimental evidence supporting this statement:
https://github.com/graysky2/kernel_gcc_patch
REQUIREMENTS
linux version >=3.15 && <4.13
gcc version >=4.9
ACKNOWLEDGMENTS
This patch builds on the seminal work by Jeroen.[5]
REFERENCES
1. https://gcc.gnu.org/gcc-4.9/changes.html
2. https://bugzilla.kernel.org/show_bug.cgi?id=77461
3. https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html
4. https://github.com/graysky2/kernel_gcc_patch/issues/15
5. http://www.linuxforge.net/docs/linux/linux-gcc.php
--- a/arch/x86/include/asm/module.h 2016-12-11 14:17:54.000000000 -0500
+++ b/arch/x86/include/asm/module.h 2017-01-06 20:44:36.602227264 -0500
@@ -15,6 +15,24 @@
#define MODULE_PROC_FAMILY "586MMX "
#elif defined CONFIG_MCORE2
#define MODULE_PROC_FAMILY "CORE2 "
+#elif defined CONFIG_MNATIVE
+#define MODULE_PROC_FAMILY "NATIVE "
+#elif defined CONFIG_MNEHALEM
+#define MODULE_PROC_FAMILY "NEHALEM "
+#elif defined CONFIG_MWESTMERE
+#define MODULE_PROC_FAMILY "WESTMERE "
+#elif defined CONFIG_MSILVERMONT
+#define MODULE_PROC_FAMILY "SILVERMONT "
+#elif defined CONFIG_MSANDYBRIDGE
+#define MODULE_PROC_FAMILY "SANDYBRIDGE "
+#elif defined CONFIG_MIVYBRIDGE
+#define MODULE_PROC_FAMILY "IVYBRIDGE "
+#elif defined CONFIG_MHASWELL
+#define MODULE_PROC_FAMILY "HASWELL "
+#elif defined CONFIG_MBROADWELL
+#define MODULE_PROC_FAMILY "BROADWELL "
+#elif defined CONFIG_MSKYLAKE
+#define MODULE_PROC_FAMILY "SKYLAKE "
#elif defined CONFIG_MATOM
#define MODULE_PROC_FAMILY "ATOM "
#elif defined CONFIG_M686
@@ -33,6 +51,26 @@
#define MODULE_PROC_FAMILY "K7 "
#elif defined CONFIG_MK8
#define MODULE_PROC_FAMILY "K8 "
+#elif defined CONFIG_MK8SSE3
+#define MODULE_PROC_FAMILY "K8SSE3 "
+#elif defined CONFIG_MK10
+#define MODULE_PROC_FAMILY "K10 "
+#elif defined CONFIG_MBARCELONA
+#define MODULE_PROC_FAMILY "BARCELONA "
+#elif defined CONFIG_MBOBCAT
+#define MODULE_PROC_FAMILY "BOBCAT "
+#elif defined CONFIG_MBULLDOZER
+#define MODULE_PROC_FAMILY "BULLDOZER "
+#elif defined CONFIG_MPILEDRIVER
+#define MODULE_PROC_FAMILY "PILEDRIVER "
+#elif defined CONFIG_MSTEAMROLLER
+#define MODULE_PROC_FAMILY "STEAMROLLER "
+#elif defined CONFIG_MJAGUAR
+#define MODULE_PROC_FAMILY "JAGUAR "
+#elif defined CONFIG_MEXCAVATOR
+#define MODULE_PROC_FAMILY "EXCAVATOR "
+#elif defined CONFIG_MZEN
+#define MODULE_PROC_FAMILY "ZEN "
#elif defined CONFIG_MELAN
#define MODULE_PROC_FAMILY "ELAN "
#elif defined CONFIG_MCRUSOE
--- a/arch/x86/Kconfig.cpu 2016-12-11 14:17:54.000000000 -0500
+++ b/arch/x86/Kconfig.cpu 2017-01-06 20:46:14.004109597 -0500
@@ -115,6 +115,7 @@ config MPENTIUMM
config MPENTIUM4
bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/older Xeon"
depends on X86_32
+ select X86_P6_NOP
---help---
Select this for Intel Pentium 4 chips. This includes the
Pentium 4, Pentium D, P4-based Celeron and Xeon, and
@@ -147,9 +148,8 @@ config MPENTIUM4
-Paxville
-Dempsey
-
config MK6
- bool "K6/K6-II/K6-III"
+ bool "AMD K6/K6-II/K6-III"
depends on X86_32
---help---
Select this for an AMD K6-family processor. Enables use of
@@ -157,7 +157,7 @@ config MK6
flags to GCC.
config MK7
- bool "Athlon/Duron/K7"
+ bool "AMD Athlon/Duron/K7"
depends on X86_32
---help---
Select this for an AMD Athlon K7-family processor. Enables use of
@@ -165,12 +165,83 @@ config MK7
flags to GCC.
config MK8
- bool "Opteron/Athlon64/Hammer/K8"
+ bool "AMD 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 MK8SSE3
+ bool "AMD Opteron/Athlon64/Hammer/K8 with SSE3"
+ ---help---
+ Select this for improved AMD Opteron or Athlon64 Hammer-family processors.
+ Enables use of some extended instructions, and passes appropriate
+ optimization flags to GCC.
+
+config MK10
+ bool "AMD 61xx/7x50/PhenomX3/X4/II/K10"
+ ---help---
+ Select this for an AMD 61xx Eight-Core Magny-Cours, Athlon X2 7x50,
+ Phenom X3/X4/II, Athlon II X2/X3/X4, or Turion II-family processor.
+ Enables use of some extended instructions, and passes appropriate
+ optimization flags to GCC.
+
+config MBARCELONA
+ bool "AMD Barcelona"
+ ---help---
+ Select this for AMD Family 10h Barcelona processors.
+
+ Enables -march=barcelona
+
+config MBOBCAT
+ bool "AMD Bobcat"
+ ---help---
+ Select this for AMD Family 14h Bobcat processors.
+
+ Enables -march=btver1
+
+config MJAGUAR
+ bool "AMD Jaguar"
+ ---help---
+ Select this for AMD Family 16h Jaguar processors.
+
+ Enables -march=btver2
+
+config MBULLDOZER
+ bool "AMD Bulldozer"
+ ---help---
+ Select this for AMD Family 15h Bulldozer processors.
+
+ Enables -march=bdver1
+
+config MPILEDRIVER
+ bool "AMD Piledriver"
+ ---help---
+ Select this for AMD Family 15h Piledriver processors.
+
+ Enables -march=bdver2
+
+config MSTEAMROLLER
+ bool "AMD Steamroller"
+ ---help---
+ Select this for AMD Family 15h Steamroller processors.
+
+ Enables -march=bdver3
+
+config MEXCAVATOR
+ bool "AMD Excavator"
+ ---help---
+ Select this for AMD Family 15h Excavator processors.
+
+ Enables -march=bdver4
+
+config MZEN
+ bool "AMD Zen"
+ ---help---
+ Select this for AMD Family 17h Zen processors.
+
+ Enables -march=znver1
+
config MCRUSOE
bool "Crusoe"
depends on X86_32
@@ -252,6 +323,7 @@ config MVIAC7
config MPSC
bool "Intel P4 / older Netburst based Xeon"
+ select X86_P6_NOP
depends on X86_64
---help---
Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
@@ -261,8 +333,19 @@ config MPSC
using the cpu family field
in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+config MATOM
+ bool "Intel Atom"
+ select X86_P6_NOP
+ ---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 MCORE2
- bool "Core 2/newer Xeon"
+ bool "Intel Core 2"
+ select X86_P6_NOP
---help---
Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and
@@ -270,14 +353,79 @@ config MCORE2
family in /proc/cpuinfo. Newer ones have 6 and older ones 15
(not a typo)
-config MATOM
- bool "Intel Atom"
+ Enables -march=core2
+
+config MNEHALEM
+ bool "Intel Nehalem"
+ select X86_P6_NOP
---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.
+ Select this for 1st Gen Core processors in the Nehalem family.
+
+ Enables -march=nehalem
+
+config MWESTMERE
+ bool "Intel Westmere"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for the Intel Westmere formerly Nehalem-C family.
+
+ Enables -march=westmere
+
+config MSILVERMONT
+ bool "Intel Silvermont"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for the Intel Silvermont platform.
+
+ Enables -march=silvermont
+
+config MSANDYBRIDGE
+ bool "Intel Sandy Bridge"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for 2nd Gen Core processors in the Sandy Bridge family.
+
+ Enables -march=sandybridge
+
+config MIVYBRIDGE
+ bool "Intel Ivy Bridge"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for 3rd Gen Core processors in the Ivy Bridge family.
+
+ Enables -march=ivybridge
+
+config MHASWELL
+ bool "Intel Haswell"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for 4th Gen Core processors in the Haswell family.
+
+ Enables -march=haswell
+
+config MBROADWELL
+ bool "Intel Broadwell"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for 5th Gen Core processors in the Broadwell family.
+
+ Enables -march=broadwell
+
+config MSKYLAKE
+ bool "Intel Skylake"
+ select X86_P6_NOP
+ ---help---
+
+ Select this for 6th Gen Core processors in the Skylake family.
+
+ Enables -march=skylake
config GENERIC_CPU
bool "Generic-x86-64"
@@ -286,6 +434,19 @@ config GENERIC_CPU
Generic x86-64 CPU.
Run equally well on all x86-64 CPUs.
+config MNATIVE
+ bool "Native optimizations autodetected by GCC"
+ ---help---
+
+ GCC 4.2 and above support -march=native, which automatically detects
+ the optimum settings to use based on your processor. -march=native
+ also detects and applies additional settings beyond -march specific
+ to your CPU, (eg. -msse4). Unless you have a specific reason not to
+ (e.g. distcc cross-compiling), you should probably be using
+ -march=native rather than anything listed below.
+
+ Enables -march=native
+
endchoice
config X86_GENERIC
@@ -310,7 +471,7 @@ config X86_INTERNODE_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 "6" if MK7 || MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MJAGUAR || MPENTIUMM || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MNATIVE || MATOM || MVIAC7 || X86_GENERIC || GENERIC_CPU
default "4" if MELAN || M486 || MGEODEGX1
default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
@@ -341,45 +502,46 @@ config X86_ALIGNMENT_16
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 || MK8 || MK8SSE3 || MK7 || MEFFICEON || MCORE2 || MK10 || MBARCELONA || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MNATIVE
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
+ depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MK10 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MEFFICEON || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MATOM || MNATIVE
config X86_USE_3DNOW
def_bool y
depends on (MCYRIXIII || MK7 || MGEODE_LX) && !UML
-#
-# 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)
+ default n
+ bool "Support for P6_NOPs on Intel chips"
+ depends on (MCORE2 || MPENTIUM4 || MPSC || MATOM || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MNATIVE)
+ ---help---
+ 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.
+
+ Say Y if you have Intel CPU newer than Pentium Pro, N otherwise.
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 || MK8 || MK8SSE3 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MNATIVE || MATOM) || X86_64
config X86_CMPXCHG64
def_bool y
- depends on X86_PAE || X86_64 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM
+ depends on X86_PAE || X86_64 || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MATOM || MNATIVE
# 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)
+ depends on (MK8 || MK8SSE3 || MK10 || MBARCELONA || MBOBCAT || MBULLDOZER || MPILEDRIVER || MSTEAMROLLER || MEXCAVATOR || MZEN || MJAGUAR || MK7 || MCORE2 || MNEHALEM || MWESTMERE || MSILVERMONT || MSANDYBRIDGE || MIVYBRIDGE || MHASWELL || MBROADWELL || MSKYLAKE || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64 || MNATIVE || MATOM || MGEODE_LX)
config X86_MINIMUM_CPU_FAMILY
int
--- a/arch/x86/Makefile 2016-12-11 14:17:54.000000000 -0500
+++ b/arch/x86/Makefile 2017-01-06 20:44:36.603227283 -0500
@@ -104,13 +104,40 @@ else
KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
+ cflags-$(CONFIG_MNATIVE) += $(call cc-option,-march=native)
cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
+ cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-mtune=k8)
+ cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10)
+ cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona)
+ cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1)
+ cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2)
+ cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1)
+ cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2)
+ cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3)
+ cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4)
+ cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1)
cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
cflags-$(CONFIG_MCORE2) += \
- $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
- cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
- $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
+ $(call cc-option,-march=core2,$(call cc-option,-mtune=core2))
+ cflags-$(CONFIG_MNEHALEM) += \
+ $(call cc-option,-march=nehalem,$(call cc-option,-mtune=nehalem))
+ cflags-$(CONFIG_MWESTMERE) += \
+ $(call cc-option,-march=westmere,$(call cc-option,-mtune=westmere))
+ cflags-$(CONFIG_MSILVERMONT) += \
+ $(call cc-option,-march=silvermont,$(call cc-option,-mtune=silvermont))
+ cflags-$(CONFIG_MSANDYBRIDGE) += \
+ $(call cc-option,-march=sandybridge,$(call cc-option,-mtune=sandybridge))
+ cflags-$(CONFIG_MIVYBRIDGE) += \
+ $(call cc-option,-march=ivybridge,$(call cc-option,-mtune=ivybridge))
+ cflags-$(CONFIG_MHASWELL) += \
+ $(call cc-option,-march=haswell,$(call cc-option,-mtune=haswell))
+ cflags-$(CONFIG_MBROADWELL) += \
+ $(call cc-option,-march=broadwell,$(call cc-option,-mtune=broadwell))
+ cflags-$(CONFIG_MSKYLAKE) += \
+ $(call cc-option,-march=skylake,$(call cc-option,-mtune=skylake))
+ cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell) \
+ $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
KBUILD_CFLAGS += $(cflags-y)
--- a/arch/x86/Makefile_32.cpu 2016-12-11 14:17:54.000000000 -0500
+++ b/arch/x86/Makefile_32.cpu 2017-01-06 20:44:36.603227283 -0500
@@ -23,7 +23,18 @@ cflags-$(CONFIG_MK6) += -march=k6
# 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_MNATIVE) += $(call cc-option,-march=native)
cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8,-march=athlon)
+cflags-$(CONFIG_MK8SSE3) += $(call cc-option,-march=k8-sse3,-march=athlon)
+cflags-$(CONFIG_MK10) += $(call cc-option,-march=amdfam10,-march=athlon)
+cflags-$(CONFIG_MBARCELONA) += $(call cc-option,-march=barcelona,-march=athlon)
+cflags-$(CONFIG_MBOBCAT) += $(call cc-option,-march=btver1,-march=athlon)
+cflags-$(CONFIG_MJAGUAR) += $(call cc-option,-march=btver2,-march=athlon)
+cflags-$(CONFIG_MBULLDOZER) += $(call cc-option,-march=bdver1,-march=athlon)
+cflags-$(CONFIG_MPILEDRIVER) += $(call cc-option,-march=bdver2,-march=athlon)
+cflags-$(CONFIG_MSTEAMROLLER) += $(call cc-option,-march=bdver3,-march=athlon)
+cflags-$(CONFIG_MEXCAVATOR) += $(call cc-option,-march=bdver4,-march=athlon)
+cflags-$(CONFIG_MZEN) += $(call cc-option,-march=znver1,-march=athlon)
cflags-$(CONFIG_MCRUSOE) += -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MEFFICEON) += -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
cflags-$(CONFIG_MWINCHIPC6) += $(call cc-option,-march=winchip-c6,-march=i586)
@@ -32,8 +43,16 @@ cflags-$(CONFIG_MCYRIXIII) += $(call cc-
cflags-$(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_MNEHALEM) += -march=i686 $(call tune,nehalem)
+cflags-$(CONFIG_MWESTMERE) += -march=i686 $(call tune,westmere)
+cflags-$(CONFIG_MSILVERMONT) += -march=i686 $(call tune,silvermont)
+cflags-$(CONFIG_MSANDYBRIDGE) += -march=i686 $(call tune,sandybridge)
+cflags-$(CONFIG_MIVYBRIDGE) += -march=i686 $(call tune,ivybridge)
+cflags-$(CONFIG_MHASWELL) += -march=i686 $(call tune,haswell)
+cflags-$(CONFIG_MBROADWELL) += -march=i686 $(call tune,broadwell)
+cflags-$(CONFIG_MSKYLAKE) += -march=i686 $(call tune,skylake)
+cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell,$(call cc-option,-march=core2,-march=i686)) \
+ $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic))
# AMD Elan support
cflags-$(CONFIG_MELAN) += -march=i486