xref: /openbmc/linux/arch/s390/Makefile (revision 405db98b) 
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
17ifeq ($(CONFIG_RELOCATABLE),y)
18KBUILD_CFLAGS	+= -fPIE
19LDFLAGS_vmlinux	:= -pie
20endif
21aflags_dwarf	:= -Wa,-gdwarf-2
22KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
23KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
24KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
25KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
26KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain
27KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
28KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
29KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
30KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
31KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
32KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
33UTS_MACHINE	:= s390x
34STACK_SIZE	:= $(if $(CONFIG_KASAN),65536,16384)
35CHECKFLAGS	+= -D__s390__ -D__s390x__
36
37export LD_BFD
38
39mflags-$(CONFIG_MARCH_Z900)   := -march=z900
40mflags-$(CONFIG_MARCH_Z990)   := -march=z990
41mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
42mflags-$(CONFIG_MARCH_Z10)    := -march=z10
43mflags-$(CONFIG_MARCH_Z196)   := -march=z196
44mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
45mflags-$(CONFIG_MARCH_Z13)    := -march=z13
46mflags-$(CONFIG_MARCH_Z14)    := -march=z14
47mflags-$(CONFIG_MARCH_Z15)    := -march=z15
48
49export CC_FLAGS_MARCH := $(mflags-y)
50
51aflags-y += $(mflags-y)
52cflags-y += $(mflags-y)
53
54cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
55cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
56cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
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
63
64cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
65
66#
67# Prevent tail-call optimizations, to get clearer backtraces:
68#
69cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
70
71ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),)
72cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
73aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
74endif
75
76KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
77KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
78
79ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
80  CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
81  ifeq ($(call cc-option,-mstack-size=8192),)
82    CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
83  endif
84  export CC_FLAGS_CHECK_STACK
85  cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
86endif
87
88ifdef CONFIG_EXPOLINE
89  ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)
90    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
91    CC_FLAGS_EXPOLINE += -mfunction-return=thunk
92    CC_FLAGS_EXPOLINE += -mindirect-branch-table
93    export CC_FLAGS_EXPOLINE
94    cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
95    aflags-y += -DCC_USING_EXPOLINE
96  endif
97endif
98
99ifdef CONFIG_FUNCTION_TRACER
100  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
101    # make use of hotpatch feature if the compiler supports it
102    cc_hotpatch	:= -mhotpatch=0,3
103    ifneq ($(call cc-option,$(cc_hotpatch)),)
104      CC_FLAGS_FTRACE := $(cc_hotpatch)
105      KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
106      KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
107    endif
108  endif
109endif
110
111# Test CFI features of binutils
112cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
113
114KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
115KBUILD_CFLAGS	+= -pipe -Wno-sign-compare
116KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables $(cfi)
117KBUILD_AFLAGS	+= $(aflags-y) $(cfi)
118export KBUILD_AFLAGS_DECOMPRESSOR
119export KBUILD_CFLAGS_DECOMPRESSOR
120
121OBJCOPYFLAGS	:= -O binary
122
123head-y		:= arch/s390/kernel/head64.o
124
125libs-y		+= arch/s390/lib/
126drivers-y	+= drivers/s390/
127
128boot		:= arch/s390/boot
129syscalls	:= arch/s390/kernel/syscalls
130tools		:= arch/s390/tools
131
132all: bzImage
133
134#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
135KBUILD_IMAGE	:= $(boot)/bzImage
136
137install:
138	sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
139	      System.map "$(INSTALL_PATH)"
140
141bzImage: vmlinux
142	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
143
144zfcpdump:
145	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
146
147vdso_install:
148	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
149
150archheaders:
151	$(Q)$(MAKE) $(build)=$(syscalls) uapi
152
153archprepare:
154	$(Q)$(MAKE) $(build)=$(syscalls) kapi
155	$(Q)$(MAKE) $(build)=$(tools) kapi
156ifeq ($(KBUILD_EXTMOD),)
157# We need to generate vdso-offsets.h before compiling certain files in kernel/.
158# In order to do that, we should use the archprepare target, but we can't since
159# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
160# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
161# Therefore we need to generate the header after prepare0 has been made, hence
162# this hack.
163prepare: vdso_prepare
164vdso_prepare: prepare0
165	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
166	$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
167		$(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
168endif
169
170# Don't use tabs in echo arguments
171define archhelp
172  echo	'* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
173  echo	'  install         - Install kernel using'
174  echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
175  echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
176  echo	'                    install to $$(INSTALL_PATH)'
177endef
178