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