xref: /linux/arch/s390/Makefile (revision f5c31bcf604db54470868f3118a60dc4a9ba8813) 
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
17ifdef CONFIG_PIE_BUILD
18KBUILD_CFLAGS	+= -fPIE
19LDFLAGS_vmlinux	:= -pie -z notext
20else
21KBUILD_CFLAGS	+= $(call cc-option,-munaligned-symbols,)
22LDFLAGS_vmlinux	:= --emit-relocs --discard-none
23extra_tools	:= relocs
24endif
25aflags_dwarf	:= -Wa,-gdwarf-2
26KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
27ifndef CONFIG_AS_IS_LLVM
28KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
29endif
30KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack
31KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
32KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
33KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
34KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
35KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
36KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
37KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
38KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
39KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
40KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds)
41
42UTS_MACHINE	:= s390x
43STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,16384)
44CHECKFLAGS	+= -D__s390__ -D__s390x__
45
46export LD_BFD
47
48mflags-$(CONFIG_MARCH_Z10)    := -march=z10
49mflags-$(CONFIG_MARCH_Z196)   := -march=z196
50mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
51mflags-$(CONFIG_MARCH_Z13)    := -march=z13
52mflags-$(CONFIG_MARCH_Z14)    := -march=z14
53mflags-$(CONFIG_MARCH_Z15)    := -march=z15
54mflags-$(CONFIG_MARCH_Z16)    := -march=z16
55
56export CC_FLAGS_MARCH := $(mflags-y)
57
58aflags-y += $(mflags-y)
59cflags-y += $(mflags-y)
60
61cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
62cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
63cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
64cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
65cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14
66cflags-$(CONFIG_MARCH_Z15_TUNE)		+= -mtune=z15
67cflags-$(CONFIG_MARCH_Z16_TUNE)		+= -mtune=z16
68
69cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
70
71#
72# Prevent tail-call optimizations, to get clearer backtraces:
73#
74cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
75
76KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
77KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
78
79ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
80  CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
81  ifeq ($(call cc-option,-mstack-size=8192),)
82    CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
83  endif
84  export CC_FLAGS_CHECK_STACK
85  cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
86endif
87
88ifdef CONFIG_EXPOLINE
89  ifdef CONFIG_EXPOLINE_EXTERN
90    KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline/expoline.o
91    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
92    CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
93  else
94    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
95    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
96  endif
97  CC_FLAGS_EXPOLINE += -mindirect-branch-table
98  export CC_FLAGS_EXPOLINE
99  cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
100  aflags-y += -DCC_USING_EXPOLINE
101endif
102
103ifdef CONFIG_FUNCTION_TRACER
104  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
105    # make use of hotpatch feature if the compiler supports it
106    cc_hotpatch	:= -mhotpatch=0,3
107    ifneq ($(call cc-option,$(cc_hotpatch)),)
108      CC_FLAGS_FTRACE := $(cc_hotpatch)
109      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
110      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
111    endif
112  endif
113endif
114
115# Test CFI features of binutils
116cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
117
118KBUILD_CFLAGS	+= -mpacked-stack -mbackchain -msoft-float $(cflags-y)
119KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
120KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
121KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
122export KBUILD_AFLAGS_DECOMPRESSOR
123export KBUILD_CFLAGS_DECOMPRESSOR
124
125OBJCOPYFLAGS	:= -O binary
126
127libs-y		+= arch/s390/lib/
128
129boot		:= arch/s390/boot
130syscalls	:= arch/s390/kernel/syscalls
131tools		:= arch/s390/tools
132
133all: bzImage
134
135#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
136KBUILD_IMAGE	:= $(boot)/bzImage
137
138install:
139	$(call cmd,install)
140
141bzImage: vmlinux
142	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
143
144zfcpdump:
145	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
146
147archheaders:
148	$(Q)$(MAKE) $(build)=$(syscalls) uapi
149
150archprepare:
151	$(Q)$(MAKE) $(build)=$(syscalls) kapi
152	$(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
153ifeq ($(KBUILD_EXTMOD),)
154# We need to generate vdso-offsets.h before compiling certain files in kernel/.
155# In order to do that, we should use the archprepare target, but we can't since
156# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
157# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
158# Therefore we need to generate the header after prepare0 has been made, hence
159# this hack.
160prepare: vdso_prepare
161vdso_prepare: prepare0
162	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
163	$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
164		$(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
165
166vdso-install-y			+= arch/s390/kernel/vdso64/vdso64.so.dbg
167vdso-install-$(CONFIG_COMPAT)	+= arch/s390/kernel/vdso32/vdso32.so.dbg
168
169ifdef CONFIG_EXPOLINE_EXTERN
170modules_prepare: expoline_prepare
171expoline_prepare: scripts
172	$(Q)$(MAKE) $(build)=arch/s390/lib/expoline arch/s390/lib/expoline/expoline.o
173endif
174endif
175
176# Don't use tabs in echo arguments
177define archhelp
178  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
179  echo	'  install         - Install kernel using'
180  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
181  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
182  echo	'                    install to $$(INSTALL_PATH)'
183endef
184