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 += $(if $(CONFIG_DEBUG_INFO),-g)
  28 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
  29 UTS_MACHINE     := s390x
  30 STACK_SIZE      := $(if $(CONFIG_KASAN),32768,16384)
  31 CHECKFLAGS      += -D__s390__ -D__s390x__
  32
  33 export LD_BFD
  34
  35 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  36 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  37 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  38 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  39 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  40 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  41 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  42 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  43
  44 export CC_FLAGS_MARCH := $(mflags-y)
  45
  46 aflags-y += $(mflags-y)
  47 cflags-y += $(mflags-y)
  48
  49 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  50 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  51 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  52 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  53 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  54 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  55 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  56 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  57
  58 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  59
  60 #
  61 # Prevent tail-call optimizations, to get clearer backtraces:
  62 #
  63 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  64
  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 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  71 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  72
  73 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  74 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  75 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  76 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  77 endif
  78 endif
  79
  80 ifdef CONFIG_WARN_DYNAMIC_STACK
  81   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  82     KBUILD_CFLAGS += -mwarn-dynamicstack
  83     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
  84   endif
  85 endif
  86
  87 ifdef CONFIG_EXPOLINE
  88   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
  89     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
  90     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
  91     CC_FLAGS_EXPOLINE += -mindirect-branch-table
  92     export CC_FLAGS_EXPOLINE
  93     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
  94     aflags-y += -DCC_USING_EXPOLINE
  95   endif
  96 endif
  97
  98 ifdef CONFIG_FUNCTION_TRACER
  99   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 100     # make use of hotpatch feature if the compiler supports it
 101     cc_hotpatch := -mhotpatch=0,3
 102     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 103       CC_FLAGS_FTRACE := $(cc_hotpatch)
 104       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 105       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 106     endif
 107   endif
 108 endif
 109
 110 # Test CFI features of binutils
 111 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 112
 113 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 114 KBUILD_CFLAGS   += -pipe -fno-strength-reduce -Wno-sign-compare
 115 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 116 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 117 export KBUILD_AFLAGS_DECOMPRESSOR
 118 export KBUILD_CFLAGS_DECOMPRESSOR
 119
 120 OBJCOPYFLAGS    := -O binary
 121
 122 head-y          := arch/s390/kernel/head64.o
 123
 124 # See arch/s390/Kbuild for content of core part of the kernel
 125 core-y          += arch/s390/
 126
 127 libs-y          += arch/s390/lib/
 128 drivers-y       += drivers/s390/
 129
 130 # must be linked after kernel
 131 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
 132
 133 boot            := arch/s390/boot
 134 syscalls        := arch/s390/kernel/syscalls
 135 tools           := arch/s390/tools
 136
 137 all: bzImage
 138
 139 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 140 KBUILD_IMAGE    := $(boot)/bzImage
 141
 142 install: vmlinux
 143         $(Q)$(MAKE) $(build)=$(boot) $@
 144
 145 bzImage: vmlinux
 146         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 147
 148 zfcpdump:
 149         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 150
 151 vdso_install:
 152         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 153         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 154
 155 archclean:
 156         $(Q)$(MAKE) $(clean)=$(boot)
 157         $(Q)$(MAKE) $(clean)=$(tools)
 158
 159 archheaders:
 160         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 161
 162 archprepare:
 163         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 164         $(Q)$(MAKE) $(build)=$(tools) kapi
 165
 166 # Don't use tabs in echo arguments
 167 define archhelp
 168   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 169   echo  '  install         - Install kernel using'
 170   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 171   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 172   echo  '                    install to $$(INSTALL_PATH)'
 173 endef