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 KBUILD_LDFLAGS  := -m elf64_s390
  15 KBUILD_AFLAGS_MODULE += -fPIC
  16 KBUILD_CFLAGS_MODULE += -fPIC
  17 KBUILD_AFLAGS   += -m64
  18 KBUILD_CFLAGS   += -m64
  19 ifeq ($(CONFIG_RELOCATABLE),y)
  20 KBUILD_CFLAGS   += -fPIE
  21 LDFLAGS_vmlinux := -pie
  22 endif
  23 aflags_dwarf    := -Wa,-gdwarf-2
  24 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
  25 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
  26 KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
  27 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
  28 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
  29 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
  30 KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
  31 KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
  32 KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
  33 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
  34 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
  35 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  36
  37 ifdef CONFIG_CC_IS_GCC
  38         ifeq ($(call cc-ifversion, -ge, 1200, y), y)
  39                 ifeq ($(call cc-ifversion, -lt, 1300, y), y)
  40                         KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
  41                         KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds)
  42                 endif
  43         endif
  44 endif
  45
  46 UTS_MACHINE     := s390x
  47 STACK_SIZE      := $(if $(CONFIG_KASAN),65536,16384)
  48 CHECKFLAGS      += -D__s390__ -D__s390x__
  49
  50 export LD_BFD
  51
  52 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  53 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  54 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  55 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  56 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  57 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  58 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  59 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  60 mflags-$(CONFIG_MARCH_Z15)    := -march=z15
  61
  62 export CC_FLAGS_MARCH := $(mflags-y)
  63
  64 aflags-y += $(mflags-y)
  65 cflags-y += $(mflags-y)
  66
  67 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  68 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  69 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  70 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  71 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  72 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  73 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  74 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  75 cflags-$(CONFIG_MARCH_Z15_TUNE)         += -mtune=z15
  76
  77 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  78
  79 #
  80 # Prevent tail-call optimizations, to get clearer backtraces:
  81 #
  82 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  83
  84 ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
  85 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  86 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  87 endif
  88
  89 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  90 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  91
  92 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  93 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  94 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  95 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  96 endif
  97 endif
  98
  99 ifdef CONFIG_WARN_DYNAMIC_STACK
 100   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
 101     KBUILD_CFLAGS += -mwarn-dynamicstack
 102     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
 103   endif
 104 endif
 105
 106 ifdef CONFIG_EXPOLINE
 107   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
 108     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
 109     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
 110     CC_FLAGS_EXPOLINE += -mindirect-branch-table
 111     export CC_FLAGS_EXPOLINE
 112     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 113     aflags-y += -DCC_USING_EXPOLINE
 114   endif
 115 endif
 116
 117 ifdef CONFIG_FUNCTION_TRACER
 118   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 119     # make use of hotpatch feature if the compiler supports it
 120     cc_hotpatch := -mhotpatch=0,3
 121     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 122       CC_FLAGS_FTRACE := $(cc_hotpatch)
 123       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 124       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 125     endif
 126   endif
 127 endif
 128
 129 # Test CFI features of binutils
 130 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 131
 132 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 133 KBUILD_CFLAGS   += -pipe -Wno-sign-compare
 134 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 135 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 136 export KBUILD_AFLAGS_DECOMPRESSOR
 137 export KBUILD_CFLAGS_DECOMPRESSOR
 138
 139 OBJCOPYFLAGS    := -O binary
 140
 141 head-y          := arch/s390/kernel/head64.o
 142
 143 # See arch/s390/Kbuild for content of core part of the kernel
 144 core-y          += arch/s390/
 145
 146 libs-y          += arch/s390/lib/
 147 drivers-y       += drivers/s390/
 148
 149 # must be linked after kernel
 150 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 151
 152 boot            := arch/s390/boot
 153 syscalls        := arch/s390/kernel/syscalls
 154 tools           := arch/s390/tools
 155
 156 all: bzImage
 157
 158 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 159 KBUILD_IMAGE    := $(boot)/bzImage
 160
 161 install:
 162         $(Q)$(MAKE) $(build)=$(boot) $@
 163
 164 bzImage: vmlinux
 165         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 166
 167 zfcpdump:
 168         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 169
 170 vdso_install:
 171         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 172
 173 archclean:
 174         $(Q)$(MAKE) $(clean)=$(boot)
 175         $(Q)$(MAKE) $(clean)=$(tools)
 176
 177 archheaders:
 178         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 179
 180 archprepare:
 181         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 182         $(Q)$(MAKE) $(build)=$(tools) kapi
 183
 184 # Don't use tabs in echo arguments
 185 define archhelp
 186   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 187   echo  '  install         - Install kernel using'
 188   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 189   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 190   echo  '                    install to $$(INSTALL_PATH)'
 191 endef