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1# SPDX-License-Identifier: GPL-2.0
2# Unified Makefile for i386 and x86_64
3
4# select defconfig based on actual architecture
5ifeq ($(ARCH),x86)
6 ifeq ($(shell uname -m | sed -e 's/i.86/i386/'),i386)
7 KBUILD_DEFCONFIG := i386_defconfig
8 else
9 KBUILD_DEFCONFIG := x86_64_defconfig
10 endif
11else
12 KBUILD_DEFCONFIG := $(ARCH)_defconfig
13endif
14
15ifdef CONFIG_CC_IS_GCC
16RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
17RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
18endif
19ifdef CONFIG_CC_IS_CLANG
20RETPOLINE_CFLAGS := -mretpoline-external-thunk
21RETPOLINE_VDSO_CFLAGS := -mretpoline
22endif
23RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
24
25ifdef CONFIG_RETHUNK
26RETHUNK_CFLAGS := -mfunction-return=thunk-extern
27RETPOLINE_CFLAGS += $(RETHUNK_CFLAGS)
28endif
29
30export RETHUNK_CFLAGS
31export RETPOLINE_CFLAGS
32export RETPOLINE_VDSO_CFLAGS
33
34# For gcc stack alignment is specified with -mpreferred-stack-boundary,
35# clang has the option -mstack-alignment for that purpose.
36ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
37 cc_stack_align4 := -mpreferred-stack-boundary=2
38 cc_stack_align8 := -mpreferred-stack-boundary=3
39else ifneq ($(call cc-option, -mstack-alignment=16),)
40 cc_stack_align4 := -mstack-alignment=4
41 cc_stack_align8 := -mstack-alignment=8
42endif
43
44# How to compile the 16-bit code. Note we always compile for -march=i386;
45# that way we can complain to the user if the CPU is insufficient.
46REALMODE_CFLAGS := -std=gnu11 -m16 -g -Os -DDISABLE_BRANCH_PROFILING -D__DISABLE_EXPORTS \
47 -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
48 -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
49 -mno-mmx -mno-sse $(call cc-option,-fcf-protection=none)
50
51REALMODE_CFLAGS += -ffreestanding
52REALMODE_CFLAGS += -fno-stack-protector
53REALMODE_CFLAGS += -Wno-address-of-packed-member
54REALMODE_CFLAGS += $(cc_stack_align4)
55REALMODE_CFLAGS += $(CLANG_FLAGS)
56export REALMODE_CFLAGS
57
58# BITS is used as extension for files which are available in a 32 bit
59# and a 64 bit version to simplify shared Makefiles.
60# e.g.: obj-y += foo_$(BITS).o
61export BITS
62
63#
64# Prevent GCC from generating any FP code by mistake.
65#
66# This must happen before we try the -mpreferred-stack-boundary, see:
67#
68# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
69#
70KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx
71KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
72
73ifeq ($(CONFIG_X86_KERNEL_IBT),y)
74#
75# Kernel IBT has S_CET.NOTRACK_EN=0, as such the compilers must not generate
76# NOTRACK prefixes. Current generation compilers unconditionally employ NOTRACK
77# for jump-tables, as such, disable jump-tables for now.
78#
79# (jump-tables are implicitly disabled by RETPOLINE)
80#
81# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104816
82#
83KBUILD_CFLAGS += $(call cc-option,-fcf-protection=branch -fno-jump-tables)
84KBUILD_RUSTFLAGS += -Zcf-protection=branch -Zno-jump-tables
85else
86KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
87endif
88
89ifeq ($(CONFIG_X86_32),y)
90 BITS := 32
91 UTS_MACHINE := i386
92 CHECKFLAGS += -D__i386__
93
94 KBUILD_AFLAGS += -m32
95 KBUILD_CFLAGS += -m32
96
97 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
98
99 # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
100 # with nonstandard options
101 KBUILD_CFLAGS += -fno-pic
102
103 # Align the stack to the register width instead of using the default
104 # alignment of 16 bytes. This reduces stack usage and the number of
105 # alignment instructions.
106 KBUILD_CFLAGS += $(cc_stack_align4)
107
108 # CPU-specific tuning. Anything which can be shared with UML should go here.
109 include $(srctree)/arch/x86/Makefile_32.cpu
110 KBUILD_CFLAGS += $(cflags-y)
111
112 # temporary until string.h is fixed
113 KBUILD_CFLAGS += -ffreestanding
114
115 ifeq ($(CONFIG_STACKPROTECTOR),y)
116 ifeq ($(CONFIG_SMP),y)
117 KBUILD_CFLAGS += -mstack-protector-guard-reg=fs -mstack-protector-guard-symbol=__stack_chk_guard
118 else
119 KBUILD_CFLAGS += -mstack-protector-guard=global
120 endif
121 endif
122else
123 BITS := 64
124 UTS_MACHINE := x86_64
125 CHECKFLAGS += -D__x86_64__
126
127 KBUILD_AFLAGS += -m64
128 KBUILD_CFLAGS += -m64
129
130 # Align jump targets to 1 byte, not the default 16 bytes:
131 KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
132
133 # Pack loops tightly as well:
134 KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
135
136 # Don't autogenerate traditional x87 instructions
137 KBUILD_CFLAGS += -mno-80387
138 KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
139
140 # By default gcc and clang use a stack alignment of 16 bytes for x86.
141 # However the standard kernel entry on x86-64 leaves the stack on an
142 # 8-byte boundary. If the compiler isn't informed about the actual
143 # alignment it will generate extra alignment instructions for the
144 # default alignment which keep the stack *mis*aligned.
145 # Furthermore an alignment to the register width reduces stack usage
146 # and the number of alignment instructions.
147 KBUILD_CFLAGS += $(cc_stack_align8)
148
149 # Use -mskip-rax-setup if supported.
150 KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
151
152 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
153 cflags-$(CONFIG_MK8) += -march=k8
154 cflags-$(CONFIG_MPSC) += -march=nocona
155 cflags-$(CONFIG_MCORE2) += -march=core2
156 cflags-$(CONFIG_MATOM) += -march=atom
157 cflags-$(CONFIG_GENERIC_CPU) += -mtune=generic
158 KBUILD_CFLAGS += $(cflags-y)
159
160 rustflags-$(CONFIG_MK8) += -Ctarget-cpu=k8
161 rustflags-$(CONFIG_MPSC) += -Ctarget-cpu=nocona
162 rustflags-$(CONFIG_MCORE2) += -Ctarget-cpu=core2
163 rustflags-$(CONFIG_MATOM) += -Ctarget-cpu=atom
164 rustflags-$(CONFIG_GENERIC_CPU) += -Ztune-cpu=generic
165 KBUILD_RUSTFLAGS += $(rustflags-y)
166
167 KBUILD_CFLAGS += -mno-red-zone
168 KBUILD_CFLAGS += -mcmodel=kernel
169 KBUILD_RUSTFLAGS += -Cno-redzone=y
170 KBUILD_RUSTFLAGS += -Ccode-model=kernel
171endif
172
173#
174# If the function graph tracer is used with mcount instead of fentry,
175# '-maccumulate-outgoing-args' is needed to prevent a GCC bug
176# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
177#
178ifdef CONFIG_FUNCTION_GRAPH_TRACER
179 ifndef CONFIG_HAVE_FENTRY
180 ACCUMULATE_OUTGOING_ARGS := 1
181 endif
182endif
183
184ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
185 # This compiler flag is not supported by Clang:
186 KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
187endif
188
189# Workaround for a gcc prelease that unfortunately was shipped in a suse release
190KBUILD_CFLAGS += -Wno-sign-compare
191#
192KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
193
194# Avoid indirect branches in kernel to deal with Spectre
195ifdef CONFIG_RETPOLINE
196 KBUILD_CFLAGS += $(RETPOLINE_CFLAGS)
197 # Additionally, avoid generating expensive indirect jumps which
198 # are subject to retpolines for small number of switch cases.
199 # clang turns off jump table generation by default when under
200 # retpoline builds, however, gcc does not for x86. This has
201 # only been fixed starting from gcc stable version 8.4.0 and
202 # onwards, but not for older ones. See gcc bug #86952.
203 ifndef CONFIG_CC_IS_CLANG
204 KBUILD_CFLAGS += -fno-jump-tables
205 endif
206endif
207
208ifdef CONFIG_SLS
209 KBUILD_CFLAGS += -mharden-sls=all
210endif
211
212ifdef CONFIG_CALL_PADDING
213PADDING_CFLAGS := -fpatchable-function-entry=$(CONFIG_FUNCTION_PADDING_BYTES),$(CONFIG_FUNCTION_PADDING_BYTES)
214KBUILD_CFLAGS += $(PADDING_CFLAGS)
215export PADDING_CFLAGS
216endif
217
218KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE)
219
220ifdef CONFIG_LTO_CLANG
221ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
222KBUILD_LDFLAGS += -plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8)
223endif
224endif
225
226ifdef CONFIG_X86_NEED_RELOCS
227LDFLAGS_vmlinux := --emit-relocs --discard-none
228else
229LDFLAGS_vmlinux :=
230endif
231
232#
233# The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to
234# the linker to force 2MB page size regardless of the default page size used
235# by the linker.
236#
237ifdef CONFIG_X86_64
238LDFLAGS_vmlinux += -z max-page-size=0x200000
239endif
240
241
242archscripts: scripts_basic
243 $(Q)$(MAKE) $(build)=arch/x86/tools relocs
244
245###
246# Syscall table generation
247
248archheaders:
249 $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
250
251###
252# Kernel objects
253
254libs-y += arch/x86/lib
255
256core-y += arch/x86/virt/
257
258# drivers-y are linked after core-y
259drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
260drivers-$(CONFIG_PCI) += arch/x86/pci/
261
262# suspend and hibernation support
263drivers-$(CONFIG_PM) += arch/x86/power/
264
265drivers-$(CONFIG_FB_CORE) += arch/x86/video/
266
267####
268# boot loader support. Several targets are kept for legacy purposes
269
270boot := arch/x86/boot
271
272BOOT_TARGETS = bzdisk fdimage fdimage144 fdimage288 hdimage isoimage
273
274PHONY += bzImage $(BOOT_TARGETS)
275
276# Default kernel to build
277all: bzImage
278
279# KBUILD_IMAGE specify target image being built
280KBUILD_IMAGE := $(boot)/bzImage
281
282bzImage: vmlinux
283ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
284 $(Q)$(MAKE) $(build)=arch/x86/tools posttest
285endif
286 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
287 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
288 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
289
290$(BOOT_TARGETS): vmlinux
291 $(Q)$(MAKE) $(build)=$(boot) $@
292
293PHONY += install
294install:
295 $(call cmd,install)
296
297vdso-install-$(CONFIG_X86_64) += arch/x86/entry/vdso/vdso64.so.dbg
298vdso-install-$(CONFIG_X86_X32_ABI) += arch/x86/entry/vdso/vdsox32.so.dbg
299vdso-install-$(CONFIG_X86_32) += arch/x86/entry/vdso/vdso32.so.dbg
300vdso-install-$(CONFIG_IA32_EMULATION) += arch/x86/entry/vdso/vdso32.so.dbg
301
302archprepare: checkbin
303checkbin:
304ifdef CONFIG_RETPOLINE
305ifeq ($(RETPOLINE_CFLAGS),)
306 @echo "You are building kernel with non-retpoline compiler." >&2
307 @echo "Please update your compiler." >&2
308 @false
309endif
310endif
311
312ifdef CONFIG_UNWINDER_ORC
313orc_hash_h := arch/$(SRCARCH)/include/generated/asm/orc_hash.h
314orc_hash_sh := $(srctree)/scripts/orc_hash.sh
315targets += $(orc_hash_h)
316quiet_cmd_orc_hash = GEN $@
317 cmd_orc_hash = mkdir -p $(dir $@); \
318 $(CONFIG_SHELL) $(orc_hash_sh) < $< > $@
319$(orc_hash_h): $(srctree)/arch/x86/include/asm/orc_types.h $(orc_hash_sh) FORCE
320 $(call if_changed,orc_hash)
321archprepare: $(orc_hash_h)
322endif
323
324archclean:
325 $(Q)rm -rf $(objtree)/arch/i386
326 $(Q)rm -rf $(objtree)/arch/x86_64
327
328define archhelp
329 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
330 echo ' install - Install kernel using (your) ~/bin/$(INSTALLKERNEL) or'
331 echo ' (distribution) /sbin/$(INSTALLKERNEL) or install to '
332 echo ' $$(INSTALL_PATH) and run lilo'
333 echo ''
334 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
335 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
336 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
337 echo ' hdimage - Create a BIOS/EFI hard disk image (arch/x86/boot/hdimage)'
338 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
339 echo ' bzdisk/fdimage*/hdimage/isoimage also accept:'
340 echo ' FDARGS="..." arguments for the booted kernel'
341 echo ' FDINITRD=file initrd for the booted kernel'
342
343endef
1# Unified Makefile for i386 and x86_64
2
3# select defconfig based on actual architecture
4ifeq ($(ARCH),x86)
5 ifeq ($(shell uname -m),x86_64)
6 KBUILD_DEFCONFIG := x86_64_defconfig
7 else
8 KBUILD_DEFCONFIG := i386_defconfig
9 endif
10else
11 KBUILD_DEFCONFIG := $(ARCH)_defconfig
12endif
13
14# How to compile the 16-bit code. Note we always compile for -march=i386;
15# that way we can complain to the user if the CPU is insufficient.
16#
17# The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
18# older versions of GCC, include an *assembly* header to make sure that
19# gcc doesn't play any games behind our back.
20CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
21M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
22
23REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \
24 -DDISABLE_BRANCH_PROFILING \
25 -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
26 -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
27 -mno-mmx -mno-sse \
28 $(call cc-option, -ffreestanding) \
29 $(call cc-option, -fno-stack-protector) \
30 $(call cc-option, -mpreferred-stack-boundary=2)
31export REALMODE_CFLAGS
32
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
36export BITS
37
38ifdef CONFIG_X86_NEED_RELOCS
39 LDFLAGS_vmlinux := --emit-relocs
40endif
41
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#
49KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
50KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
51
52ifeq ($(CONFIG_X86_32),y)
53 BITS := 32
54 UTS_MACHINE := i386
55 CHECKFLAGS += -D__i386__
56
57 biarch := $(call cc-option,-m32)
58 KBUILD_AFLAGS += $(biarch)
59 KBUILD_CFLAGS += $(biarch)
60
61 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
62
63 # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
64 # with nonstandard options
65 KBUILD_CFLAGS += -fno-pic
66
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:
72 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \
73 $(call cc-option,-fno-unit-at-a-time))
74
75 # CPU-specific tuning. Anything which can be shared with UML should go here.
76 include arch/x86/Makefile_32.cpu
77 KBUILD_CFLAGS += $(cflags-y)
78
79 # temporary until string.h is fixed
80 KBUILD_CFLAGS += -ffreestanding
81else
82 BITS := 64
83 UTS_MACHINE := x86_64
84 CHECKFLAGS += -D__x86_64__ -m64
85
86 biarch := -m64
87 KBUILD_AFLAGS += -m64
88 KBUILD_CFLAGS += -m64
89
90 # Align jump targets to 1 byte, not the default 16 bytes:
91 KBUILD_CFLAGS += -falign-jumps=1
92
93 # Pack loops tightly as well:
94 KBUILD_CFLAGS += -falign-loops=1
95
96 # Don't autogenerate traditional x87 instructions
97 KBUILD_CFLAGS += $(call cc-option,-mno-80387)
98 KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
99
100 # Use -mpreferred-stack-boundary=3 if supported.
101 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)
102
103 # Use -mskip-rax-setup if supported.
104 KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
105
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))
112 cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
113 $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
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
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)
123
124 # this works around some issues with generating unwind tables in older gccs
125 # newer gccs do it by default
126 KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)
127endif
128
129ifdef CONFIG_X86_X32
130 x32_ld_ok := $(call try-run,\
131 /bin/echo -e '1: .quad 1b' | \
132 $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
133 $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
134 $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
135 ifeq ($(x32_ld_ok),y)
136 CONFIG_X86_X32_ABI := y
137 KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
138 KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
139 else
140 $(warning CONFIG_X86_X32 enabled but no binutils support)
141 endif
142endif
143export CONFIG_X86_X32_ABI
144
145# Don't unroll struct assignments with kmemcheck enabled
146ifeq ($(CONFIG_KMEMCHECK),y)
147 KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
148endif
149
150# Stackpointer is addressed different for 32 bit and 64 bit x86
151sp-$(CONFIG_X86_32) := esp
152sp-$(CONFIG_X86_64) := rsp
153
154# do binutils support CFI?
155cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
156# is .cfi_signal_frame supported too?
157cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
158cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
159
160# does binutils support specific instructions?
161asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1)
162asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1)
163asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1)
164avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1)
165avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1)
166avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1)
167sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1)
168sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)
169
170KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
171KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr)
172
173LDFLAGS := -m elf_$(UTS_MACHINE)
174
175# Speed up the build
176KBUILD_CFLAGS += -pipe
177# Workaround for a gcc prelease that unfortunately was shipped in a suse release
178KBUILD_CFLAGS += -Wno-sign-compare
179#
180KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
181
182KBUILD_CFLAGS += $(mflags-y)
183KBUILD_AFLAGS += $(mflags-y)
184
185archscripts: scripts_basic
186 $(Q)$(MAKE) $(build)=arch/x86/tools relocs
187
188###
189# Syscall table generation
190
191archheaders:
192 $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
193
194archprepare:
195ifeq ($(CONFIG_KEXEC_FILE),y)
196 $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
197endif
198
199###
200# Kernel objects
201
202head-y := arch/x86/kernel/head_$(BITS).o
203head-y += arch/x86/kernel/head$(BITS).o
204head-y += arch/x86/kernel/ebda.o
205head-y += arch/x86/kernel/platform-quirks.o
206
207libs-y += arch/x86/lib
208
209# See arch/x86/Kbuild for content of core part of the kernel
210core-y += arch/x86/
211
212# drivers-y are linked after core-y
213drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
214drivers-$(CONFIG_PCI) += arch/x86/pci/
215
216# must be linked after kernel
217drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
218
219# suspend and hibernation support
220drivers-$(CONFIG_PM) += arch/x86/power/
221
222drivers-$(CONFIG_FB) += arch/x86/video/
223
224drivers-$(CONFIG_RAS) += arch/x86/ras/
225
226####
227# boot loader support. Several targets are kept for legacy purposes
228
229boot := arch/x86/boot
230
231BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
232
233PHONY += bzImage $(BOOT_TARGETS)
234
235# Default kernel to build
236all: bzImage
237
238# KBUILD_IMAGE specify target image being built
239KBUILD_IMAGE := $(boot)/bzImage
240
241bzImage: vmlinux
242ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
243 $(Q)$(MAKE) $(build)=arch/x86/tools posttest
244endif
245 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
246 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
247 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
248
249$(BOOT_TARGETS): vmlinux
250 $(Q)$(MAKE) $(build)=$(boot) $@
251
252PHONY += install
253install:
254 $(Q)$(MAKE) $(build)=$(boot) $@
255
256PHONY += vdso_install
257vdso_install:
258 $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
259
260archclean:
261 $(Q)rm -rf $(objtree)/arch/i386
262 $(Q)rm -rf $(objtree)/arch/x86_64
263 $(Q)$(MAKE) $(clean)=$(boot)
264 $(Q)$(MAKE) $(clean)=arch/x86/tools
265 $(Q)$(MAKE) $(clean)=arch/x86/purgatory
266
267define archhelp
268 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
269 echo ' install - Install kernel using'
270 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
271 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
272 echo ' install to $$(INSTALL_PATH) and run lilo'
273 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
274 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
275 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
276 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
277 echo ' bzdisk/fdimage*/isoimage also accept:'
278 echo ' FDARGS="..." arguments for the booted kernel'
279 echo ' FDINITRD=file initrd for the booted kernel'
280endef