1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # s390/Makefile
4 #
5 # This file is included by the global makefile
6 # architecture-specific flags and dependencies
7 #
8 # Copyright (C) 1994 by Linus Torvalds
9 #
10
11 LD_BFD := elf64-s390
12 KBUILD_LDFLAGS := -m elf64_s390
13 KBUILD_AFLAGS_MODULE += -fPIC
14 KBUILD_CFLAGS_MODULE += -fPIC
15 KBUILD_AFLAGS += -m64
16 KBUILD_CFLAGS += -m64
17 KBUILD_CFLAGS += -fPIC
18 LDFLAGS_vmlinux := -no-pie --emit-relocs --dis
19 extra_tools := relocs
20 aflags_dwarf := -Wa,-gdwarf-2
21 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -
22 ifndef CONFIG_AS_IS_LLVM
23 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DE
24 endif
25 KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -
26 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH
27 KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR
28 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null
29 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronou
30 KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
31 KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-prote
32 KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
33 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disabl
34 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DE
35 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DE
36 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC
37
38 UTS_MACHINE := s390x
39 STACK_SIZE := $(if $(CONFIG_KASAN),65536,
40 CHECKFLAGS += -D__s390__ -D__s390x__
41
42 export LD_BFD
43
44 mflags-$(CONFIG_MARCH_Z10) := -march=z10
45 mflags-$(CONFIG_MARCH_Z196) := -march=z196
46 mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
47 mflags-$(CONFIG_MARCH_Z13) := -march=z13
48 mflags-$(CONFIG_MARCH_Z14) := -march=z14
49 mflags-$(CONFIG_MARCH_Z15) := -march=z15
50 mflags-$(CONFIG_MARCH_Z16) := -march=z16
51
52 export CC_FLAGS_MARCH := $(mflags-y)
53
54 aflags-y += $(mflags-y)
55 cflags-y += $(mflags-y)
56
57 cflags-$(CONFIG_MARCH_Z10_TUNE) += -mt
58 cflags-$(CONFIG_MARCH_Z196_TUNE) += -mt
59 cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mt
60 cflags-$(CONFIG_MARCH_Z13_TUNE) += -mt
61 cflags-$(CONFIG_MARCH_Z14_TUNE) += -mt
62 cflags-$(CONFIG_MARCH_Z15_TUNE) += -mt
63 cflags-$(CONFIG_MARCH_Z16_TUNE) += -mt
64
65 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/incl
66
67 #
68 # Prevent tail-call optimizations, to get clea
69 #
70 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimiz
71
72 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
73 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
74
75 ifneq ($(call cc-option,-mstack-size=8192 -mst
76 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK
77 ifeq ($(call cc-option,-mstack-size=8192),)
78 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CO
79 endif
80 export CC_FLAGS_CHECK_STACK
81 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_C
82 endif
83
84 ifdef CONFIG_EXPOLINE
85 ifdef CONFIG_EXPOLINE_EXTERN
86 CC_FLAGS_EXPOLINE := -mindirect-branch=thu
87 CC_FLAGS_EXPOLINE += -mfunction-return=thu
88 else
89 CC_FLAGS_EXPOLINE := -mindirect-branch=thu
90 CC_FLAGS_EXPOLINE += -mfunction-return=thu
91 endif
92 CC_FLAGS_EXPOLINE += -mindirect-branch-table
93 export CC_FLAGS_EXPOLINE
94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_
95 aflags-y += -DCC_USING_EXPOLINE
96 endif
97
98 ifdef CONFIG_FUNCTION_TRACER
99 ifeq ($(call cc-option,-mfentry -mnop-mcount
100 # make use of hotpatch feature if the comp
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
108 endif
109
110 # Test CFI features of binutils
111 cfi := $(call as-instr,.cfi_startproc\n.cfi_va
112
113 KBUILD_CFLAGS += -mpacked-stack -mbackchain
114 KBUILD_CFLAGS += -pipe -Wno-sign-compare
115 KBUILD_CFLAGS += -fno-asynchronous-unwind-ta
116 KBUILD_AFLAGS += $(aflags-y) $(cfi)
117 export KBUILD_AFLAGS_DECOMPRESSOR
118 export KBUILD_CFLAGS_DECOMPRESSOR
119
120 OBJCOPYFLAGS := -O binary
121
122 libs-y += arch/s390/lib/
123
124 boot := arch/s390/boot
125 syscalls := arch/s390/kernel/syscalls
126 tools := arch/s390/tools
127
128 all: bzImage
129
130 #KBUILD_IMAGE is necessary for packaging targe
131 KBUILD_IMAGE := $(boot)/bzImage
132
133 install:
134 $(call cmd,install)
135
136 bzImage: vmlinux
137 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$
138
139 zfcpdump:
140 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$
141
142 archheaders:
143 $(Q)$(MAKE) $(build)=$(syscalls) uapi
144
145 archprepare:
146 $(Q)$(MAKE) $(build)=$(syscalls) kapi
147 $(Q)$(MAKE) $(build)=$(tools) kapi $(e
148 ifeq ($(KBUILD_EXTMOD),)
149 # We need to generate vdso-offsets.h before co
150 # In order to do that, we should use the archp
151 # asm-offsets.h is included in some files used
152 # asm-offsets.h is built in prepare0, for whic
153 # Therefore we need to generate the header aft
154 # this hack.
155 prepare: vdso_prepare
156 vdso_prepare: prepare0
157 $(Q)$(MAKE) $(build)=arch/s390/kernel/
158 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
159 $(build)=arch/s390/kernel/vdso
160
161 vdso-install-y += arch/s390/k
162 vdso-install-$(CONFIG_COMPAT) += arch/s390/k
163
164 endif
165
166 # Don't use tabs in echo arguments
167 define archhelp
168 echo '* bzImage - Kernel image for
169 echo ' install - Install kernel us
170 echo ' (your) ~/bin/$(IN
171 echo ' (distribution) /s
172 echo ' install to $$(INS
173 endef
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