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 aflags_dwarf    := -Wa,-gdwarf-2
  20 KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__
  21 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
  22 KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2
  23 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
  24 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
  25 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
  26 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
  27 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
  28 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
  29 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  30
  31 ifdef CONFIG_CC_IS_GCC
  32         ifeq ($(call cc-ifversion, -ge, 1200, y), y)
  33                 ifeq ($(call cc-ifversion, -lt, 1300, y), y)
  34                         KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
  35                         KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds)
  36                 endif
  37         endif
  38 endif
  39
  40 UTS_MACHINE     := s390x
  41 STACK_SIZE      := 16384
  42 CHECKFLAGS      += -D__s390__ -D__s390x__
  43
  44 export LD_BFD
  45
  46 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  47 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  48 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  49 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  50 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  51 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  52 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  53 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  54
  55 export CC_FLAGS_MARCH := $(mflags-y)
  56
  57 aflags-y += $(mflags-y)
  58 cflags-y += $(mflags-y)
  59
  60 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  61 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  62 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  63 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  64 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  65 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  66 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  67 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  68
  69 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  70
  71 #
  72 # Prevent tail-call optimizations, to get clearer backtraces:
  73 #
  74 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  75
  76 ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
  77 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  78 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  79 endif
  80
  81 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  82 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  83
  84 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  85 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  86 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  87 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  88 endif
  89 endif
  90
  91 ifdef CONFIG_WARN_DYNAMIC_STACK
  92   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  93     KBUILD_CFLAGS += -mwarn-dynamicstack
  94     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
  95   endif
  96 endif
  97
  98 ifdef CONFIG_EXPOLINE
  99   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
 100     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
 101     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
 102     CC_FLAGS_EXPOLINE += -mindirect-branch-table
 103     export CC_FLAGS_EXPOLINE
 104     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 105     aflags-y += -DCC_USING_EXPOLINE
 106   endif
 107 endif
 108
 109 ifdef CONFIG_FUNCTION_TRACER
 110   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 111     # make use of hotpatch feature if the compiler supports it
 112     cc_hotpatch := -mhotpatch=0,3
 113     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 114       CC_FLAGS_FTRACE := $(cc_hotpatch)
 115       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 116       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 117     endif
 118   endif
 119 endif
 120
 121 # Test CFI features of binutils
 122 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 123
 124 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 125 KBUILD_CFLAGS   += -pipe -fno-strength-reduce -Wno-sign-compare
 126 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 127 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 128 export KBUILD_AFLAGS_DECOMPRESSOR
 129 export KBUILD_CFLAGS_DECOMPRESSOR
 130
 131 OBJCOPYFLAGS    := -O binary
 132
 133 head-y          := arch/s390/kernel/head64.o
 134
 135 # See arch/s390/Kbuild for content of core part of the kernel
 136 core-y          += arch/s390/
 137
 138 libs-y          += arch/s390/lib/
 139 drivers-y       += drivers/s390/
 140
 141 # must be linked after kernel
 142 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 143
 144 boot            := arch/s390/boot
 145 syscalls        := arch/s390/kernel/syscalls
 146 tools           := arch/s390/tools
 147
 148 all: bzImage
 149
 150 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 151 KBUILD_IMAGE    := $(boot)/bzImage
 152
 153 install:
 154         $(Q)$(MAKE) $(build)=$(boot) $@
 155
 156 bzImage: vmlinux
 157         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 158
 159 zfcpdump:
 160         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 161
 162 vdso_install:
 163         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 164         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 165
 166 archclean:
 167         $(Q)$(MAKE) $(clean)=$(boot)
 168         $(Q)$(MAKE) $(clean)=$(tools)
 169
 170 archheaders:
 171         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 172
 173 archprepare:
 174         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 175         $(Q)$(MAKE) $(build)=$(tools) kapi
 176
 177 # Don't use tabs in echo arguments
 178 define archhelp
 179   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 180   echo  '  install         - Install kernel using'
 181   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 182   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 183   echo  '                    install to $$(INSTALL_PATH)'
 184 endef