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 13LD_BFD := elf64-s390 14KBUILD_LDFLAGS := -m elf64_s390 15KBUILD_AFLAGS_MODULE += -fPIC 16KBUILD_CFLAGS_MODULE += -fPIC 17KBUILD_AFLAGS += -m64 18KBUILD_CFLAGS += -m64 19ifeq ($(CONFIG_RELOCATABLE),y) 20KBUILD_CFLAGS += -fPIE 21LDFLAGS_vmlinux := -pie 22endif 23aflags_dwarf := -Wa,-gdwarf-2 24KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ 25KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 26KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 27KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 28KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float 29KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 30KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 31KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector 32KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 35 36ifdef CONFIG_CC_IS_GCC 37 ifeq ($(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 43endif 44 45UTS_MACHINE := s390x 46STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 47CHECKFLAGS += -D__s390__ -D__s390x__ 48 49export LD_BFD 50 51mflags-$(CONFIG_MARCH_Z900) := -march=z900 52mflags-$(CONFIG_MARCH_Z990) := -march=z990 53mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 54mflags-$(CONFIG_MARCH_Z10) := -march=z10 55mflags-$(CONFIG_MARCH_Z196) := -march=z196 56mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 57mflags-$(CONFIG_MARCH_Z13) := -march=z13 58mflags-$(CONFIG_MARCH_Z14) := -march=z14 59mflags-$(CONFIG_MARCH_Z15) := -march=z15 60 61export CC_FLAGS_MARCH := $(mflags-y) 62 63aflags-y += $(mflags-y) 64cflags-y += $(mflags-y) 65 66cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 67cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 68cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 69cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 70cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 71cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 72cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 73cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 74cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 75 76cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 77 78# 79# Prevent tail-call optimizations, to get clearer backtraces: 80# 81cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 82 83ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y) 84cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 85aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 86endif 87 88KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 89KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 90 91ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 92cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 93ifneq ($(call cc-option-yn,-mstack-size=8192),y) 94cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 95endif 96endif 97 98ifdef CONFIG_WARN_DYNAMIC_STACK 99 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 100 KBUILD_CFLAGS += -mwarn-dynamicstack 101 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack 102 endif 103endif 104 105ifdef CONFIG_EXPOLINE 106 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 107 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 108 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 109 CC_FLAGS_EXPOLINE += -mindirect-branch-table 110 export CC_FLAGS_EXPOLINE 111 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 112 aflags-y += -DCC_USING_EXPOLINE 113 endif 114endif 115 116ifdef CONFIG_FUNCTION_TRACER 117 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n) 118 # make use of hotpatch feature if the compiler supports it 119 cc_hotpatch := -mhotpatch=0,3 120 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 121 CC_FLAGS_FTRACE := $(cc_hotpatch) 122 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 123 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 124 endif 125 endif 126endif 127 128# Test CFI features of binutils 129cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 130 131KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 132KBUILD_CFLAGS += -pipe -Wno-sign-compare 133KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 134KBUILD_AFLAGS += $(aflags-y) $(cfi) 135export KBUILD_AFLAGS_DECOMPRESSOR 136export KBUILD_CFLAGS_DECOMPRESSOR 137 138OBJCOPYFLAGS := -O binary 139 140head-y := arch/s390/kernel/head64.o 141 142# See arch/s390/Kbuild for content of core part of the kernel 143core-y += arch/s390/ 144 145libs-y += arch/s390/lib/ 146drivers-y += drivers/s390/ 147 148# must be linked after kernel 149drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 150 151boot := arch/s390/boot 152syscalls := arch/s390/kernel/syscalls 153tools := arch/s390/tools 154 155all: bzImage 156 157#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 158KBUILD_IMAGE := $(boot)/bzImage 159 160install: 161 $(Q)$(MAKE) $(build)=$(boot) $@ 162 163bzImage: vmlinux 164 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 165 166zfcpdump: 167 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 168 169vdso_install: 170 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 171 172archclean: 173 $(Q)$(MAKE) $(clean)=$(boot) 174 $(Q)$(MAKE) $(clean)=$(tools) 175 176archheaders: 177 $(Q)$(MAKE) $(build)=$(syscalls) uapi 178 179archprepare: 180 $(Q)$(MAKE) $(build)=$(syscalls) kapi 181 $(Q)$(MAKE) $(build)=$(tools) kapi 182 183# Don't use tabs in echo arguments 184define archhelp 185 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 186 echo ' install - Install kernel using' 187 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 188 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 189 echo ' install to $$(INSTALL_PATH)' 190endef 191