xref: /linux/arch/s390/Makefile (revision 4f42d0bf72253dd01e9a8d168e28706803c98a9d) 
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 $(CONFIG_KASAN),65536,$(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
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
75ifdef CONFIG_EXPOLINE
76  ifdef CONFIG_EXPOLINE_EXTERN
77    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern
78    CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern
79  else
80    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
81    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
82  endif
83  CC_FLAGS_EXPOLINE += -mindirect-branch-table
84  export CC_FLAGS_EXPOLINE
85  cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
86  aflags-y += -DCC_USING_EXPOLINE
87endif
88
89ifdef CONFIG_FUNCTION_TRACER
90  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
91    # make use of hotpatch feature if the compiler supports it
92    cc_hotpatch	:= -mhotpatch=0,3
93    ifneq ($(call cc-option,$(cc_hotpatch)),)
94      CC_FLAGS_FTRACE := $(cc_hotpatch)
95      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
96      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
97    endif
98  endif
99endif
100
101# Test CFI features of binutils
102cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
103
104KBUILD_CFLAGS	+= -mpacked-stack -mbackchain -msoft-float $(cflags-y)
105KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
106KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
107KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
108export KBUILD_AFLAGS_DECOMPRESSOR
109export KBUILD_CFLAGS_DECOMPRESSOR
110
111OBJCOPYFLAGS	:= -O binary
112
113libs-y		+= arch/s390/lib/
114
115boot		:= arch/s390/boot
116syscalls	:= arch/s390/kernel/syscalls
117tools		:= arch/s390/tools
118
119all: bzImage
120
121#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
122KBUILD_IMAGE	:= $(boot)/bzImage
123
124install:
125	$(call cmd,install)
126
127bzImage: vmlinux
128	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
129
130zfcpdump:
131	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
132
133archheaders:
134	$(Q)$(MAKE) $(build)=$(syscalls) uapi
135
136archprepare:
137	$(Q)$(MAKE) $(build)=$(syscalls) kapi
138	$(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools)
139ifeq ($(KBUILD_EXTMOD),)
140# We need to generate vdso-offsets.h before compiling certain files in kernel/.
141# In order to do that, we should use the archprepare target, but we can't since
142# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
143# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
144# Therefore we need to generate the header after prepare0 has been made, hence
145# this hack.
146prepare: vdso_prepare
147vdso_prepare: prepare0
148	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
149	$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
150		$(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
151
152vdso-install-y			+= arch/s390/kernel/vdso64/vdso64.so.dbg
153vdso-install-$(CONFIG_COMPAT)	+= arch/s390/kernel/vdso32/vdso32.so.dbg
154
155endif
156
157# Don't use tabs in echo arguments
158define archhelp
159  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
160  echo	'  install         - Install kernel using'
161  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
162  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
163  echo	'                    install to $$(INSTALL_PATH)'
164endef
165