xref: /linux/arch/s390/Makefile (revision c0087d807ae86cc82cc356e366d2dccf0e3bb225) 
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	:= $(call ld-option,-no-pie)
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 -std=gnu11
26KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
27KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR
28KBUILD_CFLAGS_DECOMPRESSOR += -Wno-pointer-sign
29KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
30KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
31KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
32KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
33KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
34KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
36KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
37KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds)
38
39UTS_MACHINE	:= s390x
40STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384))
41CHECKFLAGS	+= -D__s390__ -D__s390x__
42
43export LD_BFD
44
45mflags-$(CONFIG_MARCH_Z10)    := -march=z10
46mflags-$(CONFIG_MARCH_Z196)   := -march=z196
47mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
48mflags-$(CONFIG_MARCH_Z13)    := -march=z13
49mflags-$(CONFIG_MARCH_Z14)    := -march=z14
50mflags-$(CONFIG_MARCH_Z15)    := -march=z15
51mflags-$(CONFIG_MARCH_Z16)    := -march=z16
52mflags-$(CONFIG_MARCH_Z17)    := -march=z17
53
54export CC_FLAGS_MARCH := $(mflags-y)
55
56aflags-y += $(mflags-y)
57cflags-y += $(mflags-y)
58
59cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
60cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
61cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
62cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
63cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14
64cflags-$(CONFIG_MARCH_Z15_TUNE)		+= -mtune=z15
65cflags-$(CONFIG_MARCH_Z16_TUNE)		+= -mtune=z16
66cflags-$(CONFIG_MARCH_Z17_TUNE)		+= -mtune=z17
67
68cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
69
70#
71# Prevent tail-call optimizations, to get clearer backtraces:
72#
73cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
74
75KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
76KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
77
78ifdef CONFIG_EXPOLINE
79  ifdef CONFIG_EXPOLINE_EXTERN
80    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
81    CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
82  else
83    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
84    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
85  endif
86  CC_FLAGS_EXPOLINE += -mindirect-branch-table
87  export CC_FLAGS_EXPOLINE
88  cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
89  aflags-y += -DCC_USING_EXPOLINE
90endif
91
92ifeq ($(CONFIG_STACKPROTECTOR),y)
93  KBUILD_CFLAGS += -mstack-protector-guard=global -mstack-protector-guard-record
94endif
95
96ifdef CONFIG_FUNCTION_TRACER
97  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
98    # make use of hotpatch feature if the compiler supports it
99    cc_hotpatch	:= -mhotpatch=0,3
100    ifneq ($(call cc-option,$(cc_hotpatch)),)
101      CC_FLAGS_FTRACE := $(cc_hotpatch)
102      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
103      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
104    endif
105  endif
106endif
107
108# Test CFI features of binutils
109cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
110
111KBUILD_CFLAGS	+= -mpacked-stack -mbackchain -msoft-float $(cflags-y)
112KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
113KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
114KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
115export KBUILD_AFLAGS_DECOMPRESSOR
116export KBUILD_CFLAGS_DECOMPRESSOR
117
118OBJCOPYFLAGS	:= -O binary
119
120libs-y		+= arch/s390/lib/
121
122boot		:= arch/s390/boot
123syscalls	:= arch/s390/kernel/syscalls
124tools		:= arch/s390/tools
125
126all: bzImage
127
128#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
129KBUILD_IMAGE	:= $(boot)/bzImage
130
131install:
132	$(call cmd,install)
133
134bzImage: vmlinux
135	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
136
137zfcpdump:
138	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
139
140archheaders:
141	$(Q)$(MAKE) $(build)=$(syscalls) all
142
143archprepare:
144	$(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
145ifeq ($(KBUILD_EXTMOD),)
146# We need to generate vdso-offsets.h before compiling certain files in kernel/.
147# In order to do that, we should use the archprepare target, but we can't since
148# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
149# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
150# Therefore we need to generate the header after prepare0 has been made, hence
151# this hack.
152prepare: vdso_prepare
153vdso_prepare: prepare0
154	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso include/generated/vdso-offsets.h
155
156vdso-install-y			+= arch/s390/kernel/vdso/vdso.so.dbg
157
158endif
159
160# Don't use tabs in echo arguments
161define archhelp
162  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
163  echo	'  install         - Install kernel using'
164  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
165  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
166  echo	'                    install to $$(INSTALL_PATH)'
167endef
168