[mirror_ubuntu-bionic-kernel.git] / arch / x86 / Makefile

# Unified Makefile for i386 and x86_64

# select defconfig based on actual architecture
ifeq ($(ARCH),x86)
  ifeq ($(shell uname -m),x86_64)
        KBUILD_DEFCONFIG := x86_64_defconfig
  else
        KBUILD_DEFCONFIG := i386_defconfig
  endif
else
        KBUILD_DEFCONFIG := $(ARCH)_defconfig
endif

# How to compile the 16-bit code.  Note we always compile for -march=i386;
# that way we can complain to the user if the CPU is insufficient.
#
# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
# older versions of GCC, include an *assembly* header to make sure that
# gcc doesn't play any games behind our back.
CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
M16_CFLAGS	 := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))

REALMODE_CFLAGS	:= $(M16_CFLAGS) -g -Os -D__KERNEL__ \
		   -DDISABLE_BRANCH_PROFILING \
		   -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
		   -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
		   -mno-mmx -mno-sse \
		   $(call cc-option, -ffreestanding) \
		   $(call cc-option, -fno-stack-protector) \
		   $(call cc-option, -mpreferred-stack-boundary=2)
export REALMODE_CFLAGS

# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
export BITS

ifdef CONFIG_X86_NEED_RELOCS
        LDFLAGS_vmlinux := --emit-relocs
endif

#
# Prevent GCC from generating any FP code by mistake.
#
# This must happen before we try the -mpreferred-stack-boundary, see:
#
#    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
#
KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
KBUILD_CFLAGS += $(call cc-option,-mno-avx,)

ifeq ($(CONFIG_X86_32),y)
        BITS := 32
        UTS_MACHINE := i386
        CHECKFLAGS += -D__i386__

        biarch := $(call cc-option,-m32)
        KBUILD_AFLAGS += $(biarch)
        KBUILD_CFLAGS += $(biarch)

        KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return

        # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
        # with nonstandard options
        KBUILD_CFLAGS += -fno-pic

        # prevent gcc from keeping the stack 16 byte aligned
        KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)

        # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
        # a lot more stack due to the lack of sharing of stacklots:
        KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
				$(call cc-option,-fno-unit-at-a-time))

        # CPU-specific tuning. Anything which can be shared with UML should go here.
        include arch/x86/Makefile_32.cpu
        KBUILD_CFLAGS += $(cflags-y)

        # temporary until string.h is fixed
        KBUILD_CFLAGS += -ffreestanding
else
        BITS := 64
        UTS_MACHINE := x86_64
        CHECKFLAGS += -D__x86_64__ -m64

        biarch := -m64
        KBUILD_AFLAGS += -m64
        KBUILD_CFLAGS += -m64

        # Align jump targets to 1 byte, not the default 16 bytes:
        KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)

        # Pack loops tightly as well:
        KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)

        # Don't autogenerate traditional x87 instructions
        KBUILD_CFLAGS += $(call cc-option,-mno-80387)
        KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)

	# Use -mpreferred-stack-boundary=3 if supported.
	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)

	# 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) += $(call cc-option,-march=k8)
        cflags-$(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))
        cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
        KBUILD_CFLAGS += $(cflags-y)

        KBUILD_CFLAGS += -mno-red-zone
        KBUILD_CFLAGS += -mcmodel=kernel

        # -funit-at-a-time shrinks the kernel .text considerably
        # unfortunately it makes reading oopses harder.
        KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
endif

ifdef CONFIG_X86_X32
	x32_ld_ok := $(call try-run,\
			/bin/echo -e '1: .quad 1b' | \
			$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
			$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
			$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
        ifeq ($(x32_ld_ok),y)
                CONFIG_X86_X32_ABI := y
                KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
                KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
        else
                $(warning CONFIG_X86_X32 enabled but no binutils support)
        endif
endif
export CONFIG_X86_X32_ABI

# Don't unroll struct assignments with kmemcheck enabled
ifeq ($(CONFIG_KMEMCHECK),y)
	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
endif

#
# If the function graph tracer is used with mcount instead of fentry,
# '-maccumulate-outgoing-args' is needed to prevent a GCC bug
# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
#
ifdef CONFIG_FUNCTION_GRAPH_TRACER
  ifndef CONFIG_HAVE_FENTRY
	ACCUMULATE_OUTGOING_ARGS := 1
  else
    ifeq ($(call cc-option-yn, -mfentry), n)
	ACCUMULATE_OUTGOING_ARGS := 1

	# GCC ignores '-maccumulate-outgoing-args' when used with '-Os'.
	# If '-Os' is enabled, disable it and print a warning.
        ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
          undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
          $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
        endif

    endif
  endif
endif

#
# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226).  There's no way
# to test for this bug at compile-time because the test case needs to execute,
# which is a no-go for cross compilers.  So check the GCC version instead.
#
ifdef CONFIG_JUMP_LABEL
  ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1)
  endif
endif

ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	# This compiler flag is not supported by Clang:
	KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
endif

# Stackpointer is addressed different for 32 bit and 64 bit x86
sp-$(CONFIG_X86_32) := esp
sp-$(CONFIG_X86_64) := rsp

# do binutils support CFI?
cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
# is .cfi_signal_frame supported too?
cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)

# does binutils support specific instructions?
asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)

KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)

LDFLAGS := -m elf_$(UTS_MACHINE)

# Speed up the build
KBUILD_CFLAGS += -pipe
# Workaround for a gcc prelease that unfortunately was shipped in a suse release
KBUILD_CFLAGS += -Wno-sign-compare
#
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables

KBUILD_CFLAGS += $(mflags-y)
KBUILD_AFLAGS += $(mflags-y)

archscripts: scripts_basic
	$(Q)$(MAKE) $(build)=arch/x86/tools relocs

###
# Syscall table generation

archheaders:
	$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all

archprepare:
ifeq ($(CONFIG_KEXEC_FILE),y)
	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
endif

###
# Kernel objects

head-y := arch/x86/kernel/head_$(BITS).o
head-y += arch/x86/kernel/head$(BITS).o
head-y += arch/x86/kernel/ebda.o
head-y += arch/x86/kernel/platform-quirks.o

libs-y  += arch/x86/lib/

# See arch/x86/Kbuild for content of core part of the kernel
core-y += arch/x86/

# drivers-y are linked after core-y
drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
drivers-$(CONFIG_PCI)            += arch/x86/pci/

# must be linked after kernel/
drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/

# suspend and hibernation support
drivers-$(CONFIG_PM) += arch/x86/power/

drivers-$(CONFIG_FB) += arch/x86/video/

drivers-$(CONFIG_RAS) += arch/x86/ras/

####
# boot loader support. Several targets are kept for legacy purposes

boot := arch/x86/boot

BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage

PHONY += bzImage $(BOOT_TARGETS)

# Default kernel to build
all: bzImage

# KBUILD_IMAGE specify target image being built
KBUILD_IMAGE := $(boot)/bzImage

bzImage: vmlinux
ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
endif
	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@

$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $@

PHONY += install
install:
	$(Q)$(MAKE) $(build)=$(boot) $@

PHONY += vdso_install
vdso_install:
	$(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@

archclean:
	$(Q)rm -rf $(objtree)/arch/i386
	$(Q)rm -rf $(objtree)/arch/x86_64
	$(Q)$(MAKE) $(clean)=$(boot)
	$(Q)$(MAKE) $(clean)=arch/x86/tools
	$(Q)$(MAKE) $(clean)=arch/x86/purgatory

define archhelp
  echo  '* bzImage      - Compressed kernel image (arch/x86/boot/bzImage)'
  echo  '  install      - Install kernel using'
  echo  '                  (your) ~/bin/$(INSTALLKERNEL) or'
  echo  '                  (distribution) /sbin/$(INSTALLKERNEL) or'
  echo  '                  install to $$(INSTALL_PATH) and run lilo'
  echo  '  fdimage      - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  fdimage144   - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  fdimage288   - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
  echo  '  isoimage     - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
  echo  '                  bzdisk/fdimage*/isoimage also accept:'
  echo  '                  FDARGS="..."  arguments for the booted kernel'
  echo  '                  FDINITRD=file initrd for the booted kernel'
endef
Commit	Line	Data
74b469f2 SR	1	# Unified Makefile for i386 and x86_64
74b469f2 SR	2
2266cfd5	3	# select defconfig based on actual architecture
d746d647	4	ifeq ($(ARCH),x86)
ffee0de4 DW	5	ifeq ($(shell uname -m),x86_64)
	6	KBUILD_DEFCONFIG := x86_64_defconfig
	7	else
d746d647	8	KBUILD_DEFCONFIG := i386_defconfig
ffee0de4	9	endif
d746d647 SR	10	else
	11	KBUILD_DEFCONFIG := $(ARCH)_defconfig
	12	endif
2266cfd5	13
1c678da3 DW	14	# How to compile the 16-bit code. Note we always compile for -march=i386;
1c678da3 DW	15	# that way we can complain to the user if the CPU is insufficient.
de3accda DW	16	#
de3accda DW	17	# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
a9cfccee PA	18	# older versions of GCC, include an assembly header to make sure that
	19	# gcc doesn't play any games behind our back.
	20	CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
de3accda DW	21	M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
	22
	23	REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
	24	-DDISABLE_BRANCH_PROFILING \
1c678da3	25	-Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
1c678da3 DW	26	-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
	27	-mno-mmx -mno-sse \
	28	$(call cc-option, -ffreestanding) \
1c678da3 DW	29	$(call cc-option, -fno-stack-protector) \
	30	$(call cc-option, -mpreferred-stack-boundary=2)
	31	export REALMODE_CFLAGS
	32
0a6ef376 SR	33	# BITS is used as extension for files which are available in a 32 bit
	34	# and a 64 bit version to simplify shared Makefiles.
	35	# e.g.: obj-y += foo_$(BITS).o
	36	export BITS
74b469f2	37
a0215061 KC	38	ifdef CONFIG_X86_NEED_RELOCS
	39	LDFLAGS_vmlinux := --emit-relocs
	40	endif
	41
b2c51106 AL	42	#
	43	# Prevent GCC from generating any FP code by mistake.
	44	#
	45	# This must happen before we try the -mpreferred-stack-boundary, see:
	46	#
	47	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
	48	#
	49	KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
	50	KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
	51
d746d647	52	ifeq ($(CONFIG_X86_32),y)
0a6ef376	53	BITS := 32
8c6531f7	54	UTS_MACHINE := i386
4ba7e5cd	55	CHECKFLAGS += -D__i386__
0a6ef376	56
4ba7e5cd SR	57	biarch := $(call cc-option,-m32)
	58	KBUILD_AFLAGS += $(biarch)
	59	KBUILD_CFLAGS += $(biarch)
0a6ef376	60
0a6ef376 SR	61	KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
0a6ef376 SR	62
484d90ee AB	63	# Never want PIC in a 32-bit kernel, prevent breakage with GCC built
	64	# with nonstandard options
	65	KBUILD_CFLAGS += -fno-pic
	66
0a6ef376 SR	67	# prevent gcc from keeping the stack 16 byte aligned
	68	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
	69
	70	# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
	71	# a lot more stack due to the lack of sharing of stacklots:
c7bd0414 FP	72	KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
c7bd0414 FP	73	$(call cc-option,-fno-unit-at-a-time))
0a6ef376 SR	74
0a6ef376 SR	75	# CPU-specific tuning. Anything which can be shared with UML should go here.
a436bb7b	76	include arch/x86/Makefile_32.cpu
0a6ef376 SR	77	KBUILD_CFLAGS += $(cflags-y)
	78
	79	# temporary until string.h is fixed
	80	KBUILD_CFLAGS += -ffreestanding
74b469f2	81	else
0a6ef376	82	BITS := 64
8c6531f7	83	UTS_MACHINE := x86_64
0a6ef376 SR	84	CHECKFLAGS += -D__x86_64__ -m64
0a6ef376 SR	85
14262d67	86	biarch := -m64
0a6ef376 SR	87	KBUILD_AFLAGS += -m64
	88	KBUILD_CFLAGS += -m64
	89
be6cb027	90	# Align jump targets to 1 byte, not the default 16 bytes:
2c4fd1ac	91	KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
be6cb027	92
52648e83	93	# Pack loops tightly as well:
2c4fd1ac	94	KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
52648e83	95
5c630089	96	# Don't autogenerate traditional x87 instructions
8f2dd677 BW	97	KBUILD_CFLAGS += $(call cc-option,-mno-80387)
8f2dd677 BW	98	KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
5551a34e	99
d9b0cde9	100	# Use -mpreferred-stack-boundary=3 if supported.
5551a34e	101	KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
d9b0cde9	102
d9ee948d L	103	# Use -mskip-rax-setup if supported.
	104	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
	105
0a6ef376 SR	106	# FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
	107	cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
	108	cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
	109
	110	cflags-$(CONFIG_MCORE2) += \
	111	$(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
366d19e1 TD	112	cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
366d19e1 TD	113	$(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
0a6ef376 SR	114	cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
	115	KBUILD_CFLAGS += $(cflags-y)
	116
	117	KBUILD_CFLAGS += -mno-red-zone
	118	KBUILD_CFLAGS += -mcmodel=kernel
	119
0a6ef376 SR	120	# -funit-at-a-time shrinks the kernel .text considerably
	121	# unfortunately it makes reading oopses harder.
	122	KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
5d707e9c	123	endif
0a6ef376	124
0bf62763 PA	125	ifdef CONFIG_X86_X32
	126	x32_ld_ok := $(call try-run,\
	127	/bin/echo -e '1: .quad 1b' \| \
b1e0d8b7	128	$(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
0bf62763 PA	129	$(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
0bf62763 PA	130	$(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
8bd69c2d IM	131	ifeq ($(x32_ld_ok),y)
	132	CONFIG_X86_X32_ABI := y
	133	KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
	134	KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
	135	else
	136	$(warning CONFIG_X86_X32 enabled but no binutils support)
	137	endif
0bf62763 PA	138	endif
	139	export CONFIG_X86_X32_ABI
	140
dfec072e VN	141	# Don't unroll struct assignments with kmemcheck enabled
	142	ifeq ($(CONFIG_KMEMCHECK),y)
	143	KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
	144	endif
	145
3f135e57 JP	146	#
	147	# If the function graph tracer is used with mcount instead of fentry,
	148	# '-maccumulate-outgoing-args' is needed to prevent a GCC bug
	149	# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
	150	#
	151	ifdef CONFIG_FUNCTION_GRAPH_TRACER
	152	ifndef CONFIG_HAVE_FENTRY
	153	ACCUMULATE_OUTGOING_ARGS := 1
	154	else
	155	ifeq ($(call cc-option-yn, -mfentry), n)
	156	ACCUMULATE_OUTGOING_ARGS := 1
a5859c6d JP	157
	158	# GCC ignores '-maccumulate-outgoing-args' when used with '-Os'.
	159	# If '-Os' is enabled, disable it and print a warning.
	160	ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
	161	undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
7e609120	162	$(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE. Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
a5859c6d JP	163	endif
a5859c6d JP	164
3f135e57 JP	165	endif
	166	endif
	167	endif
	168
	169	#
	170	# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
	171	# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way
	172	# to test for this bug at compile-time because the test case needs to execute,
	173	# which is a no-go for cross compilers. So check the GCC version instead.
	174	#
	175	ifdef CONFIG_JUMP_LABEL
	176	ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1)
	177	ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1)
	178	endif
	179	endif
	180
	181	ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
4a1bec46 ND	182	# This compiler flag is not supported by Clang:
4a1bec46 ND	183	KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
3f135e57 JP	184	endif
3f135e57 JP	185
0a6ef376 SR	186	# Stackpointer is addressed different for 32 bit and 64 bit x86
	187	sp-$(CONFIG_X86_32) := esp
	188	sp-$(CONFIG_X86_64) := rsp
	189
7b956f03 AL	190	# do binutils support CFI?
	191	cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
	192	# is .cfi_signal_frame supported too?
	193	cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
	194	cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
	195
d7acb92f PA	196	# does binutils support specific instructions?
d7acb92f PA	197	asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
75aaf4c3	198	asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
06325190	199	asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
ea4d26ae	200	avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
7056741f	201	avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
e0a491c1	202	avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
e38b6b7f	203	sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
e38b6b7f	204	sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)
d7acb92f	205
e0a491c1 GK	206	KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
e0a491c1 GK	207	KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
0a6ef376 SR	208
0a6ef376 SR	209	LDFLAGS := -m elf_$(UTS_MACHINE)
25dfeeb7 SR	210
25dfeeb7 SR	211	# Speed up the build
0a6ef376	212	KBUILD_CFLAGS += -pipe
25dfeeb7 SR	213	# Workaround for a gcc prelease that unfortunately was shipped in a suse release
	214	KBUILD_CFLAGS += -Wno-sign-compare
	215	#
	216	KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
0a6ef376	217
0a6ef376 SR	218	KBUILD_CFLAGS += $(mflags-y)
	219	KBUILD_AFLAGS += $(mflags-y)
	220
3ce9e53e	221	archscripts: scripts_basic
6520fe55 PA	222	$(Q)$(MAKE) $(build)=arch/x86/tools relocs
6520fe55 PA	223
303395ac PA	224	###
	225	# Syscall table generation
	226
	227	archheaders:
1f57d5d8	228	$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
303395ac	229
8fc5b4d4	230	archprepare:
74ca317c	231	ifeq ($(CONFIG_KEXEC_FILE),y)
8fc5b4d4	232	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
8fc5b4d4 VG	233	endif
8fc5b4d4 VG	234
0a6ef376 SR	235	###
	236	# Kernel objects
	237
700efc1b EB	238	head-y := arch/x86/kernel/head_$(BITS).o
700efc1b EB	239	head-y += arch/x86/kernel/head$(BITS).o
f2d85299	240	head-y += arch/x86/kernel/ebda.o
8d152e7a	241	head-y += arch/x86/kernel/platform-quirks.o
0a6ef376 SR	242
	243	libs-y += arch/x86/lib/
	244
d1f0ae5e SR	245	# See arch/x86/Kbuild for content of core part of the kernel
d1f0ae5e SR	246	core-y += arch/x86/
0a6ef376 SR	247
	248	# drivers-y are linked after core-y
	249	drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
	250	drivers-$(CONFIG_PCI) += arch/x86/pci/
	251
	252	# must be linked after kernel/
	253	drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
	254
cf7700fe	255	# suspend and hibernation support
0a6ef376	256	drivers-$(CONFIG_PM) += arch/x86/power/
cf7700fe	257
0a6ef376	258	drivers-$(CONFIG_FB) += arch/x86/video/
0a6ef376	259
6c36dfe9 BP	260	drivers-$(CONFIG_RAS) += arch/x86/ras/
6c36dfe9 BP	261
0a6ef376 SR	262	####
	263	# boot loader support. Several targets are kept for legacy purposes
	264
	265	boot := arch/x86/boot
	266
1648e4f8	267	BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
f9c5107c PA	268
f9c5107c PA	269	PHONY += bzImage $(BOOT_TARGETS)
0a6ef376 SR	270
	271	# Default kernel to build
	272	all: bzImage
	273
	274	# KBUILD_IMAGE specify target image being built
f9c5107c	275	KBUILD_IMAGE := $(boot)/bzImage
0a6ef376	276
f9c5107c	277	bzImage: vmlinux
ca0e9bad MH	278	ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
	279	$(Q)$(MAKE) $(build)=arch/x86/tools posttest
	280	endif
0a6ef376 SR	281	$(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
0a6ef376 SR	282	$(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
41b3eae6	283	$(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
0a6ef376	284
f9c5107c PA	285	$(BOOT_TARGETS): vmlinux
f9c5107c PA	286	$(Q)$(MAKE) $(build)=$(boot) $@
0a6ef376	287
1648e4f8 PA	288	PHONY += install
	289	install:
	290	$(Q)$(MAKE) $(build)=$(boot) $@
	291
0a6ef376 SR	292	PHONY += vdso_install
0a6ef376 SR	293	vdso_install:
d603c8e1	294	$(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
0a6ef376 SR	295
	296	archclean:
	297	$(Q)rm -rf $(objtree)/arch/i386
	298	$(Q)rm -rf $(objtree)/arch/x86_64
	299	$(Q)$(MAKE) $(clean)=$(boot)
b2d668da	300	$(Q)$(MAKE) $(clean)=arch/x86/tools
b0108f9e	301	$(Q)$(MAKE) $(clean)=arch/x86/purgatory
0a6ef376 SR	302
0a6ef376 SR	303	define archhelp
37f30e21 AK	304	echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
37f30e21 AK	305	echo ' install - Install kernel using'
caa27b66 SR	306	echo ' (your) ~/bin/$(INSTALLKERNEL) or'
caa27b66 SR	307	echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
37f30e21 AK	308	echo ' install to $$(INSTALL_PATH) and run lilo'
	309	echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	310	echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
	311	echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
	312	echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
	313	echo ' bzdisk/fdimage*/isoimage also accept:'
	314	echo ' FDARGS="..." arguments for the booted kernel'
	315	echo ' FDINITRD=file initrd for the booted kernel'
0a6ef376	316	endef