arch/s390/Makefile

   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
  13 LD_BFD          := elf64-s390
  14 LDFLAGS         := -m elf64_s390
  15 KBUILD_AFLAGS_MODULE += -fPIC
  16 KBUILD_CFLAGS_MODULE += -fPIC
  17 KBUILD_CFLAGS   += -m64
  18 KBUILD_AFLAGS   += -m64
  19 UTS_MACHINE     := s390x
  20 STACK_SIZE      := 16384
  21 CHECKFLAGS      += -D__s390__ -D__s390x__ -mbig-endian
  22
  23 export LD_BFD
  24
  25 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  26 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  27 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  28 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  29 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  30 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  31 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  32 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  33
  34 export CC_FLAGS_MARCH := $(mflags-y)
  35
  36 aflags-y += $(mflags-y)
  37 cflags-y += $(mflags-y)
  38
  39 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  40 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  41 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  42 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  43 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  44 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  45 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  46 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  47
  48 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  49
  50 #
  51 # Prevent tail-call optimizations, to get clearer backtraces:
  52 #
  53 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  54
  55 # old style option for packed stacks
  56 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
  57 cflags-$(CONFIG_PACK_STACK)  += -mkernel-backchain -D__PACK_STACK
  58 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  59 endif
  60
  61 # new style option for packed stacks
  62 ifeq ($(call cc-option-yn,-mpacked-stack),y)
  63 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  64 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  65 endif
  66
  67 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  68 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  69 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  70 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  71 endif
  72 endif
  73
  74 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  75 cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
  76 endif
  77
  78 ifdef 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 += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
  85   endif
  86 endif
  87
  88 ifdef CONFIG_FUNCTION_TRACER
  89 # make use of hotpatch feature if the compiler supports it
  90 cc_hotpatch     := -mhotpatch=0,3
  91 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
  92 CC_FLAGS_FTRACE := $(cc_hotpatch)
  93 KBUILD_AFLAGS   += -DCC_USING_HOTPATCH
  94 KBUILD_CFLAGS   += -DCC_USING_HOTPATCH
  95 endif
  96 endif
  97
  98 # Test CFI features of binutils
  99 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 100
 101 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 102 KBUILD_CFLAGS   += -pipe -fno-strength-reduce -Wno-sign-compare
 103 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 104 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 105
 106 OBJCOPYFLAGS    := -O binary
 107
 108 head-y          := arch/s390/kernel/head.o
 109 head-y          += arch/s390/kernel/head64.o
 110
 111 # See arch/s390/Kbuild for content of core part of the kernel
 112 core-y          += arch/s390/
 113
 114 libs-y          += arch/s390/lib/
 115 drivers-y       += drivers/s390/
 116
 117 # must be linked after kernel
 118 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 119
 120 boot            := arch/s390/boot
 121 syscalls        := arch/s390/kernel/syscalls
 122 tools           := arch/s390/tools
 123
 124 all: image bzImage
 125
 126 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 127 KBUILD_IMAGE    := $(boot)/bzImage
 128
 129 install: vmlinux
 130         $(Q)$(MAKE) $(build)=$(boot) $@
 131
 132 image bzImage: vmlinux
 133         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 134
 135 zfcpdump:
 136         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 137
 138 vdso_install:
 139         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 140         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 141
 142 archclean:
 143         $(Q)$(MAKE) $(clean)=$(boot)
 144         $(Q)$(MAKE) $(clean)=$(tools)
 145
 146 archheaders:
 147         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 148
 149 archprepare:
 150         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 151         $(Q)$(MAKE) $(build)=$(tools) kapi
 152
 153 # Don't use tabs in echo arguments
 154 define 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)'
 161 endef