xref: /linux/arch/s390/Makefile (revision 4b99990cdf9560e8a071640baf19f312e6ae02f4) 
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_CPPFLAGS	+= -m64
16KBUILD_CFLAGS	+= -fPIC
17LDFLAGS_vmlinux	:= $(call ld-option,-no-pie)
18extra_tools	:= relocs
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 $(CC_FLAGS_DIALECT)
25KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
26KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR
27KBUILD_CFLAGS_DECOMPRESSOR += -Wno-pointer-sign
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
38KBUILD_RUSTFLAGS += --target=s390x-unknown-none-softfloat -Zpacked-stack -Ctarget-feature=+backchain
39
40UTS_MACHINE	:= s390x
41STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384))
42CHECKFLAGS	+= -D__s390__ -D__s390x__
43
44export LD_BFD
45
46march-name-$(CONFIG_MARCH_Z10)   := z10
47march-name-$(CONFIG_MARCH_Z196)  := z196
48march-name-$(CONFIG_MARCH_ZEC12) := zEC12
49march-name-$(CONFIG_MARCH_Z13)   := z13
50march-name-$(CONFIG_MARCH_Z14)   := z14
51march-name-$(CONFIG_MARCH_Z15)   := z15
52march-name-$(CONFIG_MARCH_Z16)   := z16
53march-name-$(CONFIG_MARCH_Z17)   := z17
54
55mflags := -march=$(march-name-y)
56
57export CC_FLAGS_MARCH := $(mflags)
58
59aflags-y += $(mflags)
60cflags-y += $(mflags)
61
62KBUILD_RUSTFLAGS += -Ctarget-cpu=$(march-name-y)
63
64cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
65cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
66cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
67cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
68cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14
69cflags-$(CONFIG_MARCH_Z15_TUNE)		+= -mtune=z15
70cflags-$(CONFIG_MARCH_Z16_TUNE)		+= -mtune=z16
71cflags-$(CONFIG_MARCH_Z17_TUNE)		+= -mtune=z17
72
73cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
74
75#
76# Prevent tail-call optimizations, to get clearer backtraces:
77#
78cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
79
80KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
81KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
82
83ifdef CONFIG_EXPOLINE
84  ifdef CONFIG_EXPOLINE_EXTERN
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 += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
94  aflags-y += -DCC_USING_EXPOLINE
95endif
96
97ifeq ($(CONFIG_STACKPROTECTOR),y)
98  KBUILD_CFLAGS += -mstack-protector-guard=global -mstack-protector-guard-record
99endif
100
101ifdef CONFIG_FUNCTION_TRACER
102  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
103    # make use of hotpatch feature if the compiler supports it
104    cc_hotpatch	:= -mhotpatch=0,3
105    ifneq ($(call cc-option,$(cc_hotpatch)),)
106      CC_FLAGS_FTRACE := $(cc_hotpatch)
107      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
108      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
109    endif
110  endif
111endif
112
113# Test CFI features of binutils
114cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
115
116KBUILD_CFLAGS	+= -mpacked-stack -mbackchain -msoft-float $(cflags-y)
117KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
118KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
119KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
120export KBUILD_AFLAGS_DECOMPRESSOR
121export KBUILD_CFLAGS_DECOMPRESSOR
122
123OBJCOPYFLAGS	:= -O binary
124
125libs-y		+= arch/s390/lib/
126
127boot		:= arch/s390/boot
128syscalls	:= arch/s390/kernel/syscalls
129tools		:= arch/s390/tools
130
131all: bzImage
132
133#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
134KBUILD_IMAGE	:= $(boot)/bzImage
135
136install:
137	$(call cmd,install)
138
139bzImage: vmlinux
140	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
141
142zfcpdump:
143	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
144
145archheaders:
146	$(Q)$(MAKE) $(build)=$(syscalls) all
147
148archprepare:
149	$(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
150ifeq ($(KBUILD_EXTMOD),)
151# We need to generate vdso-offsets.h before compiling certain files in kernel/.
152# In order to do that, we should use the archprepare target, but we can't since
153# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
154# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
155# Therefore we need to generate the header after prepare0 has been made, hence
156# this hack.
157prepare: vdso_prepare
158vdso_prepare: prepare0
159	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso include/generated/vdso-offsets.h
160
161vdso-install-y			+= arch/s390/kernel/vdso/vdso.so.dbg
162
163endif
164
165# Don't use tabs in echo arguments
166define archhelp
167  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
168  echo	'  install         - Install kernel using'
169  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
170  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
171  echo	'                    install to $$(INSTALL_PATH)'
172endef
173