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