xref: /openbmc/linux/arch/s390/Makefile (revision d9fd5a71) 
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. Remember to do have actions
7# for "archclean" and "archdep" for cleaning up and making dependencies for
8# this architecture
9#
10# Copyright (C) 1994 by Linus Torvalds
11#
12
13LD_BFD		:= elf64-s390
14KBUILD_LDFLAGS	:= -m elf64_s390
15KBUILD_AFLAGS_MODULE += -fPIC
16KBUILD_CFLAGS_MODULE += -fPIC
17KBUILD_AFLAGS	+= -m64
18KBUILD_CFLAGS	+= -m64
19ifeq ($(CONFIG_RELOCATABLE),y)
20KBUILD_CFLAGS	+= -fPIE
21LDFLAGS_vmlinux	:= -pie
22endif
23aflags_dwarf	:= -Wa,-gdwarf-2
24KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
25KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
26KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
27KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
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 += $(call cc-disable-warning, address-of-packed-member)
32KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
34UTS_MACHINE	:= s390x
35STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,16384)
36CHECKFLAGS	+= -D__s390__ -D__s390x__
37
38export LD_BFD
39
40mflags-$(CONFIG_MARCH_Z900)   := -march=z900
41mflags-$(CONFIG_MARCH_Z990)   := -march=z990
42mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
43mflags-$(CONFIG_MARCH_Z10)    := -march=z10
44mflags-$(CONFIG_MARCH_Z196)   := -march=z196
45mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
46mflags-$(CONFIG_MARCH_Z13)    := -march=z13
47mflags-$(CONFIG_MARCH_Z14)    := -march=z14
48mflags-$(CONFIG_MARCH_Z15)    := -march=z15
49
50export CC_FLAGS_MARCH := $(mflags-y)
51
52aflags-y += $(mflags-y)
53cflags-y += $(mflags-y)
54
55cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
56cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
57cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
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
64
65cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
66
67#
68# Prevent tail-call optimizations, to get clearer backtraces:
69#
70cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
71
72ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
73cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
74aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
75endif
76
77KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
78KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
79
80ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
81cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
82ifneq ($(call cc-option-yn,-mstack-size=8192),y)
83cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
84endif
85endif
86
87ifdef CONFIG_WARN_DYNAMIC_STACK
88  ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
89    KBUILD_CFLAGS += -mwarn-dynamicstack
90    KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
91  endif
92endif
93
94ifdef CONFIG_EXPOLINE
95  ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
96    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
97    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
98    CC_FLAGS_EXPOLINE += -mindirect-branch-table
99    export CC_FLAGS_EXPOLINE
100    cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
101    aflags-y += -DCC_USING_EXPOLINE
102  endif
103endif
104
105ifdef CONFIG_FUNCTION_TRACER
106  ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
107    # make use of hotpatch feature if the compiler supports it
108    cc_hotpatch	:= -mhotpatch=0,3
109    ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
110      CC_FLAGS_FTRACE := $(cc_hotpatch)
111      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
112      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
113    endif
114  endif
115endif
116
117# Test CFI features of binutils
118cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
119
120KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
121KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
122KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
123KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
124export KBUILD_AFLAGS_DECOMPRESSOR
125export KBUILD_CFLAGS_DECOMPRESSOR
126
127OBJCOPYFLAGS	:= -O binary
128
129head-y		:= arch/s390/kernel/head64.o
130
131# See arch/s390/Kbuild for content of core part of the kernel
132core-y		+= arch/s390/
133
134libs-y		+= arch/s390/lib/
135drivers-y	+= drivers/s390/
136
137boot		:= arch/s390/boot
138syscalls	:= arch/s390/kernel/syscalls
139tools		:= arch/s390/tools
140
141all: bzImage
142
143#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
144KBUILD_IMAGE	:= $(boot)/bzImage
145
146install:
147	$(Q)$(MAKE) $(build)=$(boot) $@
148
149bzImage: vmlinux
150	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
151
152zfcpdump:
153	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
154
155vdso_install:
156	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
157
158archclean:
159	$(Q)$(MAKE) $(clean)=$(boot)
160	$(Q)$(MAKE) $(clean)=$(tools)
161
162archheaders:
163	$(Q)$(MAKE) $(build)=$(syscalls) uapi
164
165archprepare:
166	$(Q)$(MAKE) $(build)=$(syscalls) kapi
167	$(Q)$(MAKE) $(build)=$(tools) kapi
168
169# Don't use tabs in echo arguments
170define archhelp
171  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
172  echo	'  install         - Install kernel using'
173  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
174  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
175  echo	'                    install to $$(INSTALL_PATH)'
176endef
177