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 += $(call cc-option,-ffreestanding)
  31 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
  32 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
  33 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  34
  35 ifdef CONFIG_CC_IS_GCC
  36         ifeq ($(call cc-ifversion, -ge, 1200, y), y)
  37                 ifeq ($(call cc-ifversion, -lt, 1300, y), y)
  38                         KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
  39                         KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds)
  40                 endif
  41         endif
  42 endif
  43
  44 UTS_MACHINE     := s390x
  45 STACK_SIZE      := $(if $(CONFIG_KASAN),65536,16384)
  46 CHECKFLAGS      += -D__s390__ -D__s390x__
  47
  48 export LD_BFD
  49
  50 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  51 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  52 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  53 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  54 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  55 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  56 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  57 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  58 mflags-$(CONFIG_MARCH_Z15)    := -march=z15
  59
  60 export CC_FLAGS_MARCH := $(mflags-y)
  61
  62 aflags-y += $(mflags-y)
  63 cflags-y += $(mflags-y)
  64
  65 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  66 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  67 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  68 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  69 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  70 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  71 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  72 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  73 cflags-$(CONFIG_MARCH_Z15_TUNE)         += -mtune=z15
  74
  75 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  76
  77 #
  78 # Prevent tail-call optimizations, to get clearer backtraces:
  79 #
  80 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  81
  82 ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
  83 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  84 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  85 endif
  86
  87 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  88 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  89
  90 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  91 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  92 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  93 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  94 endif
  95 endif
  96
  97 ifdef CONFIG_WARN_DYNAMIC_STACK
  98   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  99     KBUILD_CFLAGS += -mwarn-dynamicstack
 100     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
 101   endif
 102 endif
 103
 104 ifdef CONFIG_EXPOLINE
 105   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
 106     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
 107     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
 108     CC_FLAGS_EXPOLINE += -mindirect-branch-table
 109     export CC_FLAGS_EXPOLINE
 110     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 111     aflags-y += -DCC_USING_EXPOLINE
 112   endif
 113 endif
 114
 115 ifdef CONFIG_FUNCTION_TRACER
 116   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 117     # make use of hotpatch feature if the compiler supports it
 118     cc_hotpatch := -mhotpatch=0,3
 119     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 120       CC_FLAGS_FTRACE := $(cc_hotpatch)
 121       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 122       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 123     endif
 124   endif
 125 endif
 126
 127 # Test CFI features of binutils
 128 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 129
 130 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 131 KBUILD_CFLAGS   += -pipe -Wno-sign-compare
 132 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 133 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 134 export KBUILD_AFLAGS_DECOMPRESSOR
 135 export KBUILD_CFLAGS_DECOMPRESSOR
 136
 137 OBJCOPYFLAGS    := -O binary
 138
 139 head-y          := arch/s390/kernel/head64.o
 140
 141 # See arch/s390/Kbuild for content of core part of the kernel
 142 core-y          += arch/s390/
 143
 144 libs-y          += arch/s390/lib/
 145 drivers-y       += drivers/s390/
 146
 147 # must be linked after kernel
 148 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 149
 150 boot            := arch/s390/boot
 151 syscalls        := arch/s390/kernel/syscalls
 152 tools           := arch/s390/tools
 153
 154 all: bzImage
 155
 156 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 157 KBUILD_IMAGE    := $(boot)/bzImage
 158
 159 install:
 160         $(Q)$(MAKE) $(build)=$(boot) $@
 161
 162 bzImage: vmlinux
 163         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 164
 165 zfcpdump:
 166         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 167
 168 vdso_install:
 169         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 170         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 171
 172 archclean:
 173         $(Q)$(MAKE) $(clean)=$(boot)
 174         $(Q)$(MAKE) $(clean)=$(tools)
 175
 176 archheaders:
 177         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 178
 179 archprepare:
 180         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 181         $(Q)$(MAKE) $(build)=$(tools) kapi
 182
 183 # Don't use tabs in echo arguments
 184 define archhelp
 185   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 186   echo  '  install         - Install kernel using'
 187   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 188   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 189   echo  '                    install to $$(INSTALL_PATH)'
 190 endef