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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 += -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
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. Remember to do have actions
7# for "archclean" and "archdep" for cleaning up and making dependencies for
8# this architecture
9#
10# Copyright (C) 1994 by Linus Torvalds
11#
12
13LD_BFD := elf64-s390
14KBUILD_LDFLAGS := -m elf64_s390
15KBUILD_AFLAGS_MODULE += -fPIC
16KBUILD_CFLAGS_MODULE += -fPIC
17KBUILD_AFLAGS += -m64
18KBUILD_CFLAGS += -m64
19ifeq ($(CONFIG_RELOCATABLE),y)
20KBUILD_CFLAGS += -fPIE
21LDFLAGS_vmlinux := -pie
22endif
23aflags_dwarf := -Wa,-gdwarf-2
24KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
25KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
26KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
27KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
28KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
29KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
30KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
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,))
34UTS_MACHINE := s390x
35STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384)
36CHECKFLAGS += -D__s390__ -D__s390x__
37
38export LD_BFD
39
40mflags-$(CONFIG_MARCH_Z900) := -march=z900
41mflags-$(CONFIG_MARCH_Z990) := -march=z990
42mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
43mflags-$(CONFIG_MARCH_Z10) := -march=z10
44mflags-$(CONFIG_MARCH_Z196) := -march=z196
45mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
46mflags-$(CONFIG_MARCH_Z13) := -march=z13
47mflags-$(CONFIG_MARCH_Z14) := -march=z14
48mflags-$(CONFIG_MARCH_Z15) := -march=z15
49
50export CC_FLAGS_MARCH := $(mflags-y)
51
52aflags-y += $(mflags-y)
53cflags-y += $(mflags-y)
54
55cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900
56cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990
57cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109
58cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
59cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
60cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
61cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
62cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
63cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
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
72ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
73cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
74aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
75endif
76
77KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
78KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
79
80ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
81cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
82ifneq ($(call cc-option-yn,-mstack-size=8192),y)
83cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
84endif
85endif
86
87ifdef CONFIG_WARN_DYNAMIC_STACK
88 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
89 KBUILD_CFLAGS += -mwarn-dynamicstack
90 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
91 endif
92endif
93
94ifdef CONFIG_EXPOLINE
95 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
96 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
97 CC_FLAGS_EXPOLINE += -mfunction-return=thunk
98 CC_FLAGS_EXPOLINE += -mindirect-branch-table
99 export CC_FLAGS_EXPOLINE
100 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
101 aflags-y += -DCC_USING_EXPOLINE
102 endif
103endif
104
105ifdef CONFIG_FUNCTION_TRACER
106 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
107 # make use of hotpatch feature if the compiler supports it
108 cc_hotpatch := -mhotpatch=0,3
109 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
110 CC_FLAGS_FTRACE := $(cc_hotpatch)
111 KBUILD_AFLAGS += -DCC_USING_HOTPATCH
112 KBUILD_CFLAGS += -DCC_USING_HOTPATCH
113 endif
114 endif
115endif
116
117# Test CFI features of binutils
118cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
119
120KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
121KBUILD_CFLAGS += -pipe -Wno-sign-compare
122KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
123KBUILD_AFLAGS += $(aflags-y) $(cfi)
124export KBUILD_AFLAGS_DECOMPRESSOR
125export KBUILD_CFLAGS_DECOMPRESSOR
126
127OBJCOPYFLAGS := -O binary
128
129head-y := arch/s390/kernel/head64.o
130
131# See arch/s390/Kbuild for content of core part of the kernel
132core-y += arch/s390
133
134libs-y += arch/s390/lib/
135drivers-y += drivers/s390/
136
137# must be linked after kernel
138drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
139
140boot := arch/s390/boot
141syscalls := arch/s390/kernel/syscalls
142tools := arch/s390/tools
143
144all: bzImage
145
146#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
147KBUILD_IMAGE := $(boot)/bzImage
148
149install:
150 $(Q)$(MAKE) $(build)=$(boot) $@
151
152bzImage: vmlinux
153 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
154
155zfcpdump:
156 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
157
158vdso_install:
159 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
160
161archclean:
162 $(Q)$(MAKE) $(clean)=$(boot)
163 $(Q)$(MAKE) $(clean)=$(tools)
164
165archheaders:
166 $(Q)$(MAKE) $(build)=$(syscalls) uapi
167
168archprepare:
169 $(Q)$(MAKE) $(build)=$(syscalls) kapi
170 $(Q)$(MAKE) $(build)=$(tools) kapi
171
172# Don't use tabs in echo arguments
173define archhelp
174 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
175 echo ' install - Install kernel using'
176 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
177 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
178 echo ' install to $$(INSTALL_PATH)'
179endef