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