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 -mbackchain 29KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 30KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 31KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 32KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 34UTS_MACHINE := s390x 35STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 36CHECKFLAGS += -D__s390__ -D__s390x__ 37 38export LD_BFD 39 40mflags-$(CONFIG_MARCH_Z900) := -march=z900 41mflags-$(CONFIG_MARCH_Z990) := -march=z990 42mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 43mflags-$(CONFIG_MARCH_Z10) := -march=z10 44mflags-$(CONFIG_MARCH_Z196) := -march=z196 45mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 46mflags-$(CONFIG_MARCH_Z13) := -march=z13 47mflags-$(CONFIG_MARCH_Z14) := -march=z14 48mflags-$(CONFIG_MARCH_Z15) := -march=z15 49 50export CC_FLAGS_MARCH := $(mflags-y) 51 52aflags-y += $(mflags-y) 53cflags-y += $(mflags-y) 54 55cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 56cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 57cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 58cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 59cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 60cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 61cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 62cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 63cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 64 65cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 66 67# 68# Prevent tail-call optimizations, to get clearer backtraces: 69# 70cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 71 72ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y) 73cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 74aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 75endif 76 77KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 78KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 79 80ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 81cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 82ifneq ($(call cc-option-yn,-mstack-size=8192),y) 83cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 84endif 85endif 86 87ifdef CONFIG_WARN_DYNAMIC_STACK 88 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 89 KBUILD_CFLAGS += -mwarn-dynamicstack 90 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack 91 endif 92endif 93 94ifdef CONFIG_EXPOLINE 95 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 96 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 97 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 98 CC_FLAGS_EXPOLINE += -mindirect-branch-table 99 export CC_FLAGS_EXPOLINE 100 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 101 aflags-y += -DCC_USING_EXPOLINE 102 endif 103endif 104 105ifdef CONFIG_FUNCTION_TRACER 106 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n) 107 # make use of hotpatch feature if the compiler supports it 108 cc_hotpatch := -mhotpatch=0,3 109 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 110 CC_FLAGS_FTRACE := $(cc_hotpatch) 111 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 112 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 113 endif 114 endif 115endif 116 117# Test CFI features of binutils 118cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 119 120KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 121KBUILD_CFLAGS += -pipe -Wno-sign-compare 122KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 123KBUILD_AFLAGS += $(aflags-y) $(cfi) 124export KBUILD_AFLAGS_DECOMPRESSOR 125export KBUILD_CFLAGS_DECOMPRESSOR 126 127OBJCOPYFLAGS := -O binary 128 129head-y := arch/s390/kernel/head64.o 130 131# See arch/s390/Kbuild for content of core part of the kernel 132core-y += arch/s390/ 133 134libs-y += arch/s390/lib/ 135drivers-y += drivers/s390/ 136 137boot := arch/s390/boot 138syscalls := arch/s390/kernel/syscalls 139tools := arch/s390/tools 140 141all: bzImage 142 143#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 144KBUILD_IMAGE := $(boot)/bzImage 145 146install: 147 $(Q)$(MAKE) $(build)=$(boot) $@ 148 149bzImage: vmlinux 150 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 151 152zfcpdump: 153 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 154 155vdso_install: 156 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 157 158archclean: 159 $(Q)$(MAKE) $(clean)=$(boot) 160 $(Q)$(MAKE) $(clean)=$(tools) 161 162archheaders: 163 $(Q)$(MAKE) $(build)=$(syscalls) uapi 164 165archprepare: 166 $(Q)$(MAKE) $(build)=$(syscalls) kapi 167 $(Q)$(MAKE) $(build)=$(tools) kapi 168 169# Don't use tabs in echo arguments 170define archhelp 171 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 172 echo ' install - Install kernel using' 173 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 174 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 175 echo ' install to $$(INSTALL_PATH)' 176endef 177