Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
14LDFLAGS := -m elf64_s390
15KBUILD_AFLAGS_MODULE += -fPIC
16KBUILD_CFLAGS_MODULE += -fPIC
17KBUILD_CFLAGS += -m64
18KBUILD_AFLAGS += -m64
19UTS_MACHINE := s390x
20STACK_SIZE := 16384
21CHECKFLAGS += -D__s390__ -D__s390x__ -mbig-endian
22
23export LD_BFD
24
25mflags-$(CONFIG_MARCH_Z900) := -march=z900
26mflags-$(CONFIG_MARCH_Z990) := -march=z990
27mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
28mflags-$(CONFIG_MARCH_Z10) := -march=z10
29mflags-$(CONFIG_MARCH_Z196) := -march=z196
30mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
31mflags-$(CONFIG_MARCH_Z13) := -march=z13
32mflags-$(CONFIG_MARCH_Z14) := -march=z14
33
34export CC_FLAGS_MARCH := $(mflags-y)
35
36aflags-y += $(mflags-y)
37cflags-y += $(mflags-y)
38
39cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900
40cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990
41cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109
42cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
43cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
44cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
45cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
46cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
47
48cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
49
50#KBUILD_IMAGE is necessary for make rpm
51KBUILD_IMAGE :=arch/s390/boot/image
52
53#
54# Prevent tail-call optimizations, to get clearer backtraces:
55#
56cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
57
58# old style option for packed stacks
59ifeq ($(call cc-option-yn,-mkernel-backchain),y)
60cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
61aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
62endif
63
64# new style option for packed stacks
65ifeq ($(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
70ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
71cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
72ifneq ($(call cc-option-yn,-mstack-size=8192),y)
73cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
74endif
75endif
76
77ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
78cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
79endif
80
81ifdef CONFIG_EXPOLINE
82 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
83 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
84 CC_FLAGS_EXPOLINE += -mfunction-return=thunk
85 CC_FLAGS_EXPOLINE += -mindirect-branch-table
86 export CC_FLAGS_EXPOLINE
87 cflags-y += $(CC_FLAGS_EXPOLINE)
88 endif
89endif
90
91ifdef CONFIG_FUNCTION_TRACER
92# make use of hotpatch feature if the compiler supports it
93cc_hotpatch := -mhotpatch=0,3
94ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
95CC_FLAGS_FTRACE := $(cc_hotpatch)
96KBUILD_AFLAGS += -DCC_USING_HOTPATCH
97KBUILD_CFLAGS += -DCC_USING_HOTPATCH
98endif
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 += -mbackchain -msoft-float $(cflags-y)
105KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
106KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
107KBUILD_AFLAGS += $(aflags-y) $(cfi)
108
109OBJCOPYFLAGS := -O binary
110
111head-y := arch/s390/kernel/head.o
112head-y += arch/s390/kernel/head64.o
113
114# See arch/s390/Kbuild for content of core part of the kernel
115core-y += arch/s390/
116
117libs-y += arch/s390/lib/
118drivers-y += drivers/s390/
119
120# must be linked after kernel
121drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
122
123boot := arch/s390/boot
124syscalls := arch/s390/kernel/syscalls
125tools := arch/s390/tools
126
127all: image bzImage
128
129install: vmlinux
130 $(Q)$(MAKE) $(build)=$(boot) $@
131
132image bzImage: vmlinux
133 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
134
135zfcpdump:
136 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
137
138vdso_install:
139 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
140 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
141
142archclean:
143 $(Q)$(MAKE) $(clean)=$(boot)
144 $(Q)$(MAKE) $(clean)=$(tools)
145
146archheaders:
147 $(Q)$(MAKE) $(build)=$(syscalls) uapi
148
149archprepare:
150 $(Q)$(MAKE) $(build)=$(syscalls) kapi
151 $(Q)$(MAKE) $(build)=$(tools) kapi
152
153# Don't use tabs in echo arguments
154define archhelp
155 echo '* image - Kernel image for IPL ($(boot)/image)'
156 echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'
157 echo ' install - Install kernel using'
158 echo ' (your) ~/bin/$(INSTALLKERNEL) or'
159 echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
160 echo ' install to $$(INSTALL_PATH)'
161endef