Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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__
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/$(ARCH)/include
49
50#
51# Prevent tail-call optimizations, to get clearer backtraces:
52#
53cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
54
55# old style option for packed stacks
56ifeq ($(call cc-option-yn,-mkernel-backchain),y)
57cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
58aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
59endif
60
61# new style option for packed stacks
62ifeq ($(call cc-option-yn,-mpacked-stack),y)
63cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
64aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
65endif
66
67ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
68cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
69ifneq ($(call cc-option-yn,-mstack-size=8192),y)
70cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
71endif
72endif
73
74ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
75cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
76endif
77
78ifdef CONFIG_EXPOLINE
79 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
80 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
81 CC_FLAGS_EXPOLINE += -mfunction-return=thunk
82 CC_FLAGS_EXPOLINE += -mindirect-branch-table
83 export CC_FLAGS_EXPOLINE
84 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
85 endif
86endif
87
88ifdef CONFIG_FUNCTION_TRACER
89# make use of hotpatch feature if the compiler supports it
90cc_hotpatch := -mhotpatch=0,3
91ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
92CC_FLAGS_FTRACE := $(cc_hotpatch)
93KBUILD_AFLAGS += -DCC_USING_HOTPATCH
94KBUILD_CFLAGS += -DCC_USING_HOTPATCH
95endif
96endif
97
98# Test CFI features of binutils
99cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
100
101KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
102KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
103KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
104KBUILD_AFLAGS += $(aflags-y) $(cfi)
105
106OBJCOPYFLAGS := -O binary
107
108head-y := arch/s390/kernel/head.o
109head-y += arch/s390/kernel/head64.o
110
111# See arch/s390/Kbuild for content of core part of the kernel
112core-y += arch/s390/
113
114libs-y += arch/s390/lib/
115drivers-y += drivers/s390/
116
117# must be linked after kernel
118drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
119
120boot := arch/s390/boot
121syscalls := arch/s390/kernel/syscalls
122tools := arch/s390/tools
123
124all: image bzImage
125
126#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
127KBUILD_IMAGE := $(boot)/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