xref: /linux/arch/s390/Makefile (revision 0c8ea05e9b3d8e5287e2a968f2a2e744dfd31b99) 
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
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 $(CONFIG_KASAN),65536,16384)
40CHECKFLAGS	+= -D__s390__ -D__s390x__
41
42export LD_BFD
43
44mflags-$(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
174