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 -mbackchain
  29 KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
  30 KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
  31 KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
  32 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
  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-$(CONFIG_MARCH_Z14)    := -march=z14
  49 mflags-$(CONFIG_MARCH_Z15)    := -march=z15
  50
  51 export CC_FLAGS_MARCH := $(mflags-y)
  52
  53 aflags-y += $(mflags-y)
  54 cflags-y += $(mflags-y)
  55
  56 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  57 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  58 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  59 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  60 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  61 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  62 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  63 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  64 cflags-$(CONFIG_MARCH_Z15_TUNE)         += -mtune=z15
  65
  66 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  67
  68 #
  69 # Prevent tail-call optimizations, to get clearer backtraces:
  70 #
  71 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  72
  73 ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
  74 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  75 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  76 endif
  77
  78 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  79 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  80
  81 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  82 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  83 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
  84 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  85 endif
  86 endif
  87
  88 ifdef CONFIG_WARN_DYNAMIC_STACK
  89   ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  90     KBUILD_CFLAGS += -mwarn-dynamicstack
  91     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
  92   endif
  93 endif
  94
  95 ifdef CONFIG_EXPOLINE
  96   ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
  97     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
  98     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
  99     CC_FLAGS_EXPOLINE += -mindirect-branch-table
 100     export CC_FLAGS_EXPOLINE
 101     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 102     aflags-y += -DCC_USING_EXPOLINE
 103   endif
 104 endif
 105
 106 ifdef CONFIG_FUNCTION_TRACER
 107   ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
 108     # make use of hotpatch feature if the compiler supports it
 109     cc_hotpatch := -mhotpatch=0,3
 110     ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
 111       CC_FLAGS_FTRACE := $(cc_hotpatch)
 112       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 113       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 114     endif
 115   endif
 116 endif
 117
 118 # Test CFI features of binutils
 119 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 120
 121 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 122 KBUILD_CFLAGS   += -pipe -Wno-sign-compare
 123 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 124 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 125 export KBUILD_AFLAGS_DECOMPRESSOR
 126 export KBUILD_CFLAGS_DECOMPRESSOR
 127
 128 OBJCOPYFLAGS    := -O binary
 129
 130 head-y          := arch/s390/kernel/head64.o
 131
 132 libs-y          += arch/s390/lib/
 133 drivers-y       += drivers/s390/
 134
 135 boot            := arch/s390/boot
 136 syscalls        := arch/s390/kernel/syscalls
 137 tools           := arch/s390/tools
 138
 139 all: bzImage
 140
 141 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 142 KBUILD_IMAGE    := $(boot)/bzImage
 143
 144 install:
 145         sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
 146               System.map "$(INSTALL_PATH)"
 147
 148 bzImage: vmlinux
 149         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 150
 151 zfcpdump:
 152         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 153
 154 vdso_install:
 155         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 156
 157 archclean:
 158         $(Q)$(MAKE) $(clean)=$(boot)
 159         $(Q)$(MAKE) $(clean)=$(tools)
 160
 161 archheaders:
 162         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 163
 164 archprepare:
 165         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 166         $(Q)$(MAKE) $(build)=$(tools) kapi
 167 ifeq ($(KBUILD_EXTMOD),)
 168 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
 169 # In order to do that, we should use the archprepare target, but we can't since
 170 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 171 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 172 # Therefore we need to generate the header after prepare0 has been made, hence
 173 # this hack.
 174 prepare: vdso_prepare
 175 vdso_prepare: prepare0
 176         $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
 177         $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
 178                 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
 179 endif
 180
 181 # Don't use tabs in echo arguments
 182 define archhelp
 183   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 184   echo  '  install         - Install kernel using'
 185   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 186   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 187   echo  '                    install to $$(INSTALL_PATH)'
 188 endef