xref: /openbmc/linux/arch/s390/Makefile (revision 8a5aaf97) 
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
19aflags_dwarf	:= -Wa,-gdwarf-2
20KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__
21KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
22KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2
23KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
24KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
25KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
26KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
27KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
28KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
29UTS_MACHINE	:= s390x
30STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,16384)
31CHECKFLAGS	+= -D__s390__ -D__s390x__
32
33export LD_BFD
34
35mflags-$(CONFIG_MARCH_Z900)   := -march=z900
36mflags-$(CONFIG_MARCH_Z990)   := -march=z990
37mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
38mflags-$(CONFIG_MARCH_Z10)    := -march=z10
39mflags-$(CONFIG_MARCH_Z196)   := -march=z196
40mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
41mflags-$(CONFIG_MARCH_Z13)    := -march=z13
42mflags-$(CONFIG_MARCH_Z14)    := -march=z14
43
44export CC_FLAGS_MARCH := $(mflags-y)
45
46aflags-y += $(mflags-y)
47cflags-y += $(mflags-y)
48
49cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
50cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
51cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
52cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
53cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
54cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
55cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
56cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14
57
58cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
59
60#
61# Prevent tail-call optimizations, to get clearer backtraces:
62#
63cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
64
65ifeq ($(call cc-option-yn,-mpacked-stack),y)
66cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
67aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
68endif
69
70KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
71KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
72
73ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
74cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
75ifneq ($(call cc-option-yn,-mstack-size=8192),y)
76cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
77endif
78endif
79
80ifdef CONFIG_WARN_DYNAMIC_STACK
81  ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
82    KBUILD_CFLAGS += -mwarn-dynamicstack
83    KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
84  endif
85endif
86
87ifdef CONFIG_EXPOLINE
88  ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
89    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
90    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
91    CC_FLAGS_EXPOLINE += -mindirect-branch-table
92    export CC_FLAGS_EXPOLINE
93    cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
94    aflags-y += -DCC_USING_EXPOLINE
95  endif
96endif
97
98ifdef CONFIG_FUNCTION_TRACER
99  ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
100    # make use of hotpatch feature if the compiler supports it
101    cc_hotpatch	:= -mhotpatch=0,3
102    ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
103      CC_FLAGS_FTRACE := $(cc_hotpatch)
104      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
105      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
106    endif
107  endif
108endif
109
110# Test CFI features of binutils
111cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
112
113KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
114KBUILD_CFLAGS	+= -pipe -fno-strength-reduce -Wno-sign-compare
115KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
116KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
117export KBUILD_AFLAGS_DECOMPRESSOR
118export KBUILD_CFLAGS_DECOMPRESSOR
119
120OBJCOPYFLAGS	:= -O binary
121
122head-y		:= arch/s390/kernel/head64.o
123
124# See arch/s390/Kbuild for content of core part of the kernel
125core-y		+= arch/s390/
126
127libs-y		+= arch/s390/lib/
128drivers-y	+= drivers/s390/
129
130# must be linked after kernel
131drivers-$(CONFIG_OPROFILE)	+= arch/s390/oprofile/
132
133boot		:= arch/s390/boot
134syscalls	:= arch/s390/kernel/syscalls
135tools		:= arch/s390/tools
136
137all: bzImage
138
139#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
140KBUILD_IMAGE	:= $(boot)/bzImage
141
142install: vmlinux
143	$(Q)$(MAKE) $(build)=$(boot) $@
144
145bzImage: vmlinux
146	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
147
148zfcpdump:
149	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
150
151vdso_install:
152	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
153	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
154
155archclean:
156	$(Q)$(MAKE) $(clean)=$(boot)
157	$(Q)$(MAKE) $(clean)=$(tools)
158
159archheaders:
160	$(Q)$(MAKE) $(build)=$(syscalls) uapi
161
162archprepare:
163	$(Q)$(MAKE) $(build)=$(syscalls) kapi
164	$(Q)$(MAKE) $(build)=$(tools) kapi
165
166# Don't use tabs in echo arguments
167define archhelp
168  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
169  echo	'  install         - Install kernel using'
170  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
171  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
172  echo	'                    install to $$(INSTALL_PATH)'
173endef
174