xref: /linux/arch/s390/Makefile (revision f21f7b5162e9dbde6d3d5ce727d4ca2552d76ce9) 
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
38UTS_MACHINE	:= s390x
39STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384))
40CHECKFLAGS	+= -D__s390__ -D__s390x__
41
42export LD_BFD
43
44mflags-$(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
51mflags-$(CONFIG_MARCH_Z17)    := -march=z17
52
53export CC_FLAGS_MARCH := $(mflags-y)
54
55aflags-y += $(mflags-y)
56cflags-y += $(mflags-y)
57
58cflags-$(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-$(CONFIG_MARCH_Z15_TUNE)		+= -mtune=z15
64cflags-$(CONFIG_MARCH_Z16_TUNE)		+= -mtune=z16
65cflags-$(CONFIG_MARCH_Z17_TUNE)		+= -mtune=z17
66
67cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
68
69#
70# Prevent tail-call optimizations, to get clearer backtraces:
71#
72cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
73
74KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
75KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
76
77ifdef CONFIG_EXPOLINE
78  ifdef CONFIG_EXPOLINE_EXTERN
79    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
80    CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
81  else
82    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
83    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
84  endif
85  CC_FLAGS_EXPOLINE += -mindirect-branch-table
86  export CC_FLAGS_EXPOLINE
87  cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
88  aflags-y += -DCC_USING_EXPOLINE
89endif
90
91ifeq ($(CONFIG_STACKPROTECTOR),y)
92  KBUILD_CFLAGS += -mstack-protector-guard=global -mstack-protector-guard-record
93endif
94
95ifdef CONFIG_FUNCTION_TRACER
96  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
97    # make use of hotpatch feature if the compiler supports it
98    cc_hotpatch	:= -mhotpatch=0,3
99    ifneq ($(call cc-option,$(cc_hotpatch)),)
100      CC_FLAGS_FTRACE := $(cc_hotpatch)
101      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
102      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
103    endif
104  endif
105endif
106
107# Test CFI features of binutils
108cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
109
110KBUILD_CFLAGS	+= -mpacked-stack -mbackchain -msoft-float $(cflags-y)
111KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
112KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
113KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
114export KBUILD_AFLAGS_DECOMPRESSOR
115export KBUILD_CFLAGS_DECOMPRESSOR
116
117OBJCOPYFLAGS	:= -O binary
118
119libs-y		+= arch/s390/lib/
120
121boot		:= arch/s390/boot
122syscalls	:= arch/s390/kernel/syscalls
123tools		:= arch/s390/tools
124
125all: bzImage
126
127#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
128KBUILD_IMAGE	:= $(boot)/bzImage
129
130install:
131	$(call cmd,install)
132
133bzImage: vmlinux
134	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
135
136zfcpdump:
137	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
138
139archheaders:
140	$(Q)$(MAKE) $(build)=$(syscalls) all
141
142archprepare:
143	$(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
144ifeq ($(KBUILD_EXTMOD),)
145# We need to generate vdso-offsets.h before compiling certain files in kernel/.
146# In order to do that, we should use the archprepare target, but we can't since
147# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
148# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
149# Therefore we need to generate the header after prepare0 has been made, hence
150# this hack.
151prepare: vdso_prepare
152vdso_prepare: prepare0
153	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso include/generated/vdso-offsets.h
154
155vdso-install-y			+= arch/s390/kernel/vdso/vdso.so.dbg
156
157endif
158
159# Don't use tabs in echo arguments
160define archhelp
161  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
162  echo	'  install         - Install kernel using'
163  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
164  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
165  echo	'                    install to $$(INSTALL_PATH)'
166endef
167