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), $(call cc-option, -gdwarf-4,))
  35
  36 ifdef CONFIG_CC_IS_GCC
  37         ifeq ($(call cc-ifversion, -ge, 1200, y), y)
  38                 ifeq ($(call cc-ifversion, -lt, 1300, y), y)
  39                         KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
  40                         KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds)
  41                 endif
  42         endif
  43 endif
  44
  45 UTS_MACHINE     := s390x
  46 STACK_SIZE      := $(if $(CONFIG_KASAN),65536,16384)
  47 CHECKFLAGS      += -D__s390__ -D__s390x__
  48
  49 export LD_BFD
  50
  51 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  52 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  53 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  54 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  55 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  56 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
  57 mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  58 mflags-$(CONFIG_MARCH_Z14)    := -march=z14
  59 mflags-$(CONFIG_MARCH_Z15)    := -march=z15
  60
  61 export CC_FLAGS_MARCH := $(mflags-y)
  62
  63 aflags-y += $(mflags-y)
  64 cflags-y += $(mflags-y)
  65
  66 cflags-$(CONFIG_MARCH_Z900_TUNE)        += -mtune=z900
  67 cflags-$(CONFIG_MARCH_Z990_TUNE)        += -mtune=z990
  68 cflags-$(CONFIG_MARCH_Z9_109_TUNE)      += -mtune=z9-109
  69 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
  70 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
  71 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
  72 cflags-$(CONFIG_MARCH_Z13_TUNE)         += -mtune=z13
  73 cflags-$(CONFIG_MARCH_Z14_TUNE)         += -mtune=z14
  74 cflags-$(CONFIG_MARCH_Z15_TUNE)         += -mtune=z15
  75
  76 cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
  77
  78 #
  79 # Prevent tail-call optimizations, to get clearer backtraces:
  80 #
  81 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  82
  83 ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),)
  84 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  85 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  86 endif
  87
  88 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
  89 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
  90
  91 ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
  92   CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE)
  93   ifeq ($(call cc-option,-mstack-size=8192),)
  94     CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD)
  95   endif
  96   export CC_FLAGS_CHECK_STACK
  97   cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK)
  98 endif
  99
 100 ifdef CONFIG_EXPOLINE
 101   ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)
 102     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
 103     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
 104     CC_FLAGS_EXPOLINE += -mindirect-branch-table
 105     export CC_FLAGS_EXPOLINE
 106     cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
 107     aflags-y += -DCC_USING_EXPOLINE
 108   endif
 109 endif
 110
 111 ifdef CONFIG_FUNCTION_TRACER
 112   ifeq ($(call cc-option,-mfentry -mnop-mcount),)
 113     # make use of hotpatch feature if the compiler supports it
 114     cc_hotpatch := -mhotpatch=0,3
 115     ifneq ($(call cc-option,$(cc_hotpatch)),)
 116       CC_FLAGS_FTRACE := $(cc_hotpatch)
 117       KBUILD_AFLAGS     += -DCC_USING_HOTPATCH
 118       KBUILD_CFLAGS     += -DCC_USING_HOTPATCH
 119     endif
 120   endif
 121 endif
 122
 123 # Test CFI features of binutils
 124 cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
 125
 126 KBUILD_CFLAGS   += -mbackchain -msoft-float $(cflags-y)
 127 KBUILD_CFLAGS   += -pipe -Wno-sign-compare
 128 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables $(cfi)
 129 KBUILD_AFLAGS   += $(aflags-y) $(cfi)
 130 export KBUILD_AFLAGS_DECOMPRESSOR
 131 export KBUILD_CFLAGS_DECOMPRESSOR
 132
 133 OBJCOPYFLAGS    := -O binary
 134
 135 head-y          := arch/s390/kernel/head64.o
 136
 137 libs-y          += arch/s390/lib/
 138 drivers-y       += drivers/s390/
 139
 140 boot            := arch/s390/boot
 141 syscalls        := arch/s390/kernel/syscalls
 142 tools           := arch/s390/tools
 143
 144 all: bzImage
 145
 146 #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
 147 KBUILD_IMAGE    := $(boot)/bzImage
 148
 149 install:
 150         sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
 151               System.map "$(INSTALL_PATH)"
 152
 153 bzImage: vmlinux
 154         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 155
 156 zfcpdump:
 157         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 158
 159 vdso_install:
 160         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 161
 162 archclean:
 163         $(Q)$(MAKE) $(clean)=$(boot)
 164         $(Q)$(MAKE) $(clean)=$(tools)
 165
 166 archheaders:
 167         $(Q)$(MAKE) $(build)=$(syscalls) uapi
 168
 169 archprepare:
 170         $(Q)$(MAKE) $(build)=$(syscalls) kapi
 171         $(Q)$(MAKE) $(build)=$(tools) kapi
 172 ifeq ($(KBUILD_EXTMOD),)
 173 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
 174 # In order to do that, we should use the archprepare target, but we can't since
 175 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 176 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 177 # Therefore we need to generate the header after prepare0 has been made, hence
 178 # this hack.
 179 prepare: vdso_prepare
 180 vdso_prepare: prepare0
 181         $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
 182         $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
 183                 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
 184 endif
 185
 186 # Don't use tabs in echo arguments
 187 define archhelp
 188   echo  '* bzImage         - Kernel image for IPL ($(boot)/bzImage)'
 189   echo  '  install         - Install kernel using'
 190   echo  '                    (your) ~/bin/$(INSTALLKERNEL) or'
 191   echo  '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 192   echo  '                    install to $$(INSTALL_PATH)'
 193 endef