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1# SPDX-License-Identifier: GPL-2.0
2#
3# s390/Makefile
4#
5# This file is included by the global makefile so that you can add your own
6# architecture-specific flags and dependencies.
7#
8# Copyright (C) 1994 by Linus Torvalds
9#
10
11LD_BFD := elf64-s390
12KBUILD_LDFLAGS := -m elf64_s390
13KBUILD_AFLAGS_MODULE += -fPIC
14KBUILD_CFLAGS_MODULE += -fPIC
15KBUILD_AFLAGS += -m64
16KBUILD_CFLAGS += -m64
17KBUILD_CFLAGS += -fPIC
18LDFLAGS_vmlinux := -no-pie --emit-relocs --discard-none
19extra_tools := relocs
20aflags_dwarf := -Wa,-gdwarf-2
21KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
22ifndef CONFIG_AS_IS_LLVM
23KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
24endif
25KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack -std=gnu11
26KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
27KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR
28KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
29KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
30KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
31KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
32KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
33KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
36KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds)
37
38UTS_MACHINE := s390x
39STACK_SIZE := $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384))
40CHECKFLAGS += -D__s390__ -D__s390x__
41
42export LD_BFD
43
44mflags-$(CONFIG_MARCH_Z10) := -march=z10
45mflags-$(CONFIG_MARCH_Z196) := -march=z196
46mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
47mflags-$(CONFIG_MARCH_Z13) := -march=z13
48mflags-$(CONFIG_MARCH_Z14) := -march=z14
49mflags-$(CONFIG_MARCH_Z15) := -march=z15
50mflags-$(CONFIG_MARCH_Z16) := -march=z16
51
52export CC_FLAGS_MARCH := $(mflags-y)
53
54aflags-y += $(mflags-y)
55cflags-y += $(mflags-y)
56
57cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
58cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
59cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
60cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
61cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
62cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
63cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16
64
65cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
66
67#
68# Prevent tail-call optimizations, to get clearer backtraces:
69#
70cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
71
72KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
73KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
74
75ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
76 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
77 ifeq ($(call cc-option,-mstack-size=8192),)
78 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
79 endif
80 export CC_FLAGS_CHECK_STACK
81 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
82endif
83
84ifdef CONFIG_EXPOLINE
85 ifdef CONFIG_EXPOLINE_EXTERN
86 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
87 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
88 else
89 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
90 CC_FLAGS_EXPOLINE += -mfunction-return=thunk
91 endif
92 CC_FLAGS_EXPOLINE += -mindirect-branch-table
93 export CC_FLAGS_EXPOLINE
94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
95 aflags-y += -DCC_USING_EXPOLINE
96endif
97
98ifdef CONFIG_FUNCTION_TRACER
99 ifeq ($(call cc-option,-mfentry -mnop-mcount),)
100 # make use of hotpatch feature if the compiler supports it
101 cc_hotpatch := -mhotpatch=0,3
102 ifneq ($(call cc-option,$(cc_hotpatch)),)
103 CC_FLAGS_FTRACE := $(cc_hotpatch)
104 KBUILD_AFLAGS += -DCC_USING_HOTPATCH
105 KBUILD_CFLAGS += -DCC_USING_HOTPATCH
106 endif
107 endif
108endif
109
110# Test CFI features of binutils
111cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
112
113KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y)
114KBUILD_CFLAGS += -pipe -Wno-sign-compare
115KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
116KBUILD_AFLAGS += $(aflags-y) $(cfi)
117export KBUILD_AFLAGS_DECOMPRESSOR
118export KBUILD_CFLAGS_DECOMPRESSOR
119
120OBJCOPYFLAGS := -O binary
121
122libs-y += arch/s390/lib
123
124boot := arch/s390/boot
125syscalls := arch/s390/kernel/syscalls
126tools := arch/s390/tools
127
128all: bzImage
129
130#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
131KBUILD_IMAGE := $(boot)/bzImage
132
133install:
134 $(call cmd,install)
135
136bzImage: vmlinux
137 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
138
139zfcpdump:
140 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
141
142archheaders:
143 $(Q)$(MAKE) $(build)=$(syscalls) uapi
144
145archprepare:
146 $(Q)$(MAKE) $(build)=$(syscalls) kapi
147 $(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
148ifeq ($(KBUILD_EXTMOD),)
149# We need to generate vdso-offsets.h before compiling certain files in kernel/.
150# In order to do that, we should use the archprepare target, but we can't since
151# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
152# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
153# Therefore we need to generate the header after prepare0 has been made, hence
154# this hack.
155prepare: vdso_prepare
156vdso_prepare: prepare0
157 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
158 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
159 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
160
161vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg
162vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg
163
164endif
165
166# Don't use tabs in echo arguments
167define archhelp
168 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
169 echo ' install - Install kernel using'
170 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
171 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
172 echo ' install to $$(INSTALL_PATH)'
173endef
1# SPDX-License-Identifier: GPL-2.0
2#
3# s390/Makefile
4#
5# This file is included by the global makefile so that you can add your own
6# architecture-specific flags and dependencies.
7#
8# Copyright (C) 1994 by Linus Torvalds
9#
10
11LD_BFD := elf64-s390
12KBUILD_LDFLAGS := -m elf64_s390
13KBUILD_AFLAGS_MODULE += -fPIC
14KBUILD_CFLAGS_MODULE += -fPIC
15KBUILD_AFLAGS += -m64
16KBUILD_CFLAGS += -m64
17KBUILD_CFLAGS += -fPIE
18LDFLAGS_vmlinux := -pie
19aflags_dwarf := -Wa,-gdwarf-2
20KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
21ifndef CONFIG_AS_IS_LLVM
22KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
23endif
24KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack
25KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
26KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
27KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
28KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
29KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
30KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
31KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
32KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds)
35
36UTS_MACHINE := s390x
37STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384)
38CHECKFLAGS += -D__s390__ -D__s390x__
39
40export LD_BFD
41
42mflags-$(CONFIG_MARCH_Z10) := -march=z10
43mflags-$(CONFIG_MARCH_Z196) := -march=z196
44mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
45mflags-$(CONFIG_MARCH_Z13) := -march=z13
46mflags-$(CONFIG_MARCH_Z14) := -march=z14
47mflags-$(CONFIG_MARCH_Z15) := -march=z15
48mflags-$(CONFIG_MARCH_Z16) := -march=z16
49
50export CC_FLAGS_MARCH := $(mflags-y)
51
52aflags-y += $(mflags-y)
53cflags-y += $(mflags-y)
54
55cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
56cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
57cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
58cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
59cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
60cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
61cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16
62
63cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
64
65#
66# Prevent tail-call optimizations, to get clearer backtraces:
67#
68cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
69
70KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
71KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
72
73ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
74 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
75 ifeq ($(call cc-option,-mstack-size=8192),)
76 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
77 endif
78 export CC_FLAGS_CHECK_STACK
79 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
80endif
81
82ifdef CONFIG_EXPOLINE
83 ifdef CONFIG_EXPOLINE_EXTERN
84 KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline/expoline.o
85 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
86 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
87 else
88 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
89 CC_FLAGS_EXPOLINE += -mfunction-return=thunk
90 endif
91 CC_FLAGS_EXPOLINE += -mindirect-branch-table
92 export CC_FLAGS_EXPOLINE
93 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
94 aflags-y += -DCC_USING_EXPOLINE
95endif
96
97ifdef CONFIG_FUNCTION_TRACER
98 ifeq ($(call cc-option,-mfentry -mnop-mcount),)
99 # make use of hotpatch feature if the compiler supports it
100 cc_hotpatch := -mhotpatch=0,3
101 ifneq ($(call cc-option,$(cc_hotpatch)),)
102 CC_FLAGS_FTRACE := $(cc_hotpatch)
103 KBUILD_AFLAGS += -DCC_USING_HOTPATCH
104 KBUILD_CFLAGS += -DCC_USING_HOTPATCH
105 endif
106 endif
107endif
108
109# Test CFI features of binutils
110cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
111
112KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y)
113KBUILD_CFLAGS += -pipe -Wno-sign-compare
114KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
115KBUILD_AFLAGS += $(aflags-y) $(cfi)
116export KBUILD_AFLAGS_DECOMPRESSOR
117export KBUILD_CFLAGS_DECOMPRESSOR
118
119OBJCOPYFLAGS := -O binary
120
121libs-y += arch/s390/lib
122
123boot := arch/s390/boot
124syscalls := arch/s390/kernel/syscalls
125tools := arch/s390/tools
126
127all: bzImage
128
129#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
130KBUILD_IMAGE := $(boot)/bzImage
131
132install:
133 $(call cmd,install)
134
135bzImage: vmlinux
136 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
137
138zfcpdump:
139 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
140
141archheaders:
142 $(Q)$(MAKE) $(build)=$(syscalls) uapi
143
144archprepare:
145 $(Q)$(MAKE) $(build)=$(syscalls) kapi
146 $(Q)$(MAKE) $(build)=$(tools) kapi
147ifeq ($(KBUILD_EXTMOD),)
148# We need to generate vdso-offsets.h before compiling certain files in kernel/.
149# In order to do that, we should use the archprepare target, but we can't since
150# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
151# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
152# Therefore we need to generate the header after prepare0 has been made, hence
153# this hack.
154prepare: vdso_prepare
155vdso_prepare: prepare0
156 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
157 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
158 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
159
160vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg
161vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg
162
163ifdef CONFIG_EXPOLINE_EXTERN
164modules_prepare: expoline_prepare
165expoline_prepare: scripts
166 $(Q)$(MAKE) $(build)=arch/s390/lib/expoline arch/s390/lib/expoline/expoline.o
167endif
168endif
169
170# Don't use tabs in echo arguments
171define archhelp
172 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
173 echo ' install - Install kernel using'
174 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
175 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
176 echo ' install to $$(INSTALL_PATH)'
177endef