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 KBUILD_DEFCONFIG := defconfig
  14
  15 LD_BFD          := elf64-s390
  16 KBUILD_LDFLAGS  := -m elf64_s390
  17 KBUILD_AFLAGS_MODULE += -fPIC
  18 KBUILD_CFLAGS_MODULE += -fPIC
  19 KBUILD_AFLAGS   += -m64
  20 KBUILD_CFLAGS   += -m64
  21 ifeq ($(CONFIG_RELOCATABLE),y)
  22 KBUILD_CFLAGS   += -fPIE
  23 LDFLAGS_vmlinux := -pie
  24 endif
  25 aflags_dwarf    := -Wa,-gdwarf-2
  26 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
  27 KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
  28 KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
  29 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
  30 KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
  31 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
  32 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
  33 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
  34 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  35 UTS_MACHINE     := s390x
  36 STACK_SIZE      := $(if $(CONFIG_KASAN),65536,16384)
  37 CHECKFLAGS      += -D__s390__ -D__s390x__
  38
  39 export LD_BFD
  40
  41 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  42 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  43 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  44 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  45 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  46 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  47 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  48 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  49
  50 export CC_FLAGS_MARCH := $(mflags-y)
  51
  52 aflags-y += $(mflags-y)
  53 cflags-y += $(mflags-y)
  54
  55 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  56 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  57 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  58 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  59 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  60 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  61 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  62 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  63
  64 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  65
  66 #
  67 # Prevent tail-call optimizations, to get clearer backtraces:
  68 #
  69 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  70
  71 ifeq ($(call cc-option-yn,-mpacked-stack),y)
  72 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  73 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  74 endif
  75
  76 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  77 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  78
  79 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  80 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  81 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  82 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  83 endif
  84 endif
  85
  86 ifdef CONFIG_WARN_DYNAMIC_STACK
  87   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  88     KBUILD_CFLAGS += -mwarn-dynamicstack
  89     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
  90   endif
  91 endif
  92
  93 ifdef CONFIG_EXPOLINE
  94   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
  95     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
  96     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
  97     CC_FLAGS_EXPOLINE += -mindirect-branch-table
  98     export CC_FLAGS_EXPOLINE
  99     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 100     aflags-y += -DCC_USING_EXPOLINE
 101   endif
 102 endif
 103
 104 ifdef CONFIG_FUNCTION_TRACER
 105   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 106     # make use of hotpatch feature if the compiler supports it
 107     cc_hotpatch := -mhotpatch=0,3
 108     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 109       CC_FLAGS_FTRACE := $(cc_hotpatch)
 110       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 111       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 112     endif
 113   endif
 114 endif
 115
 116 # Test CFI features of binutils
 117 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 118
 119 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 120 KBUILD_CFLAGS   += -pipe -Wno-sign-compare
 121 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 122 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 123 export KBUILD_AFLAGS_DECOMPRESSOR
 124 export KBUILD_CFLAGS_DECOMPRESSOR
 125
 126 OBJCOPYFLAGS    := -O binary
 127
 128 head-y          := arch/s390/kernel/head64.o
 129
 130 # See arch/s390/Kbuild for content of core part of the kernel
 131 core-y          += arch/s390/
 132
 133 libs-y          += arch/s390/lib/
 134 drivers-y       += drivers/s390/
 135
 136 # must be linked after kernel
 137 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 138
 139 boot            := arch/s390/boot
 140 syscalls        := arch/s390/kernel/syscalls
 141 tools           := arch/s390/tools
 142
 143 all: bzImage
 144
 145 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 146 KBUILD_IMAGE    := $(boot)/bzImage
 147
 148 install: vmlinux
 149         $(Q)$(MAKE) $(build)=$(boot) $@
 150
 151 bzImage: vmlinux
 152         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 153
 154 zfcpdump:
 155         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 156
 157 vdso_install:
 158         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 159         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 160
 161 archclean:
 162         $(Q)$(MAKE) $(clean)=$(boot)
 163         $(Q)$(MAKE) $(clean)=$(tools)
 164
 165 archheaders:
 166         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 167
 168 archprepare:
 169         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 170         $(Q)$(MAKE) $(build)=$(tools) kapi
 171
 172 # Don't use tabs in echo arguments
 173 define archhelp
 174   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 175   echo  '  install         - Install kernel using'
 176   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 177   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 178   echo  '                    install to $$(INSTALL_PATH)'
 179 endef