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 += $(call cc-option,-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 48 49export CC_FLAGS_MARCH := $(mflags-y) 50 51aflags-y += $(mflags-y) 52cflags-y += $(mflags-y) 53 54cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 55cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 56cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 57cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 58cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 59cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 60cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 61cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 62 63cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 64 65# 66# Prevent tail-call optimizations, to get clearer backtraces: 67# 68cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 69 70ifeq ($(call cc-option-yn,-mpacked-stack),y) 71cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 72aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 73endif 74 75KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 76KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 77 78ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 79cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 80ifneq ($(call cc-option-yn,-mstack-size=8192),y) 81cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 82endif 83endif 84 85ifdef CONFIG_WARN_DYNAMIC_STACK 86 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 87 KBUILD_CFLAGS += -mwarn-dynamicstack 88 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack 89 endif 90endif 91 92ifdef CONFIG_EXPOLINE 93 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 94 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 95 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 96 CC_FLAGS_EXPOLINE += -mindirect-branch-table 97 export CC_FLAGS_EXPOLINE 98 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 99 aflags-y += -DCC_USING_EXPOLINE 100 endif 101endif 102 103ifdef CONFIG_FUNCTION_TRACER 104 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n) 105 # make use of hotpatch feature if the compiler supports it 106 cc_hotpatch := -mhotpatch=0,3 107 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 108 CC_FLAGS_FTRACE := $(cc_hotpatch) 109 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 110 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 111 endif 112 endif 113endif 114 115# Test CFI features of binutils 116cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 117 118KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 119KBUILD_CFLAGS += -pipe -Wno-sign-compare 120KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 121KBUILD_AFLAGS += $(aflags-y) $(cfi) 122export KBUILD_AFLAGS_DECOMPRESSOR 123export KBUILD_CFLAGS_DECOMPRESSOR 124 125OBJCOPYFLAGS := -O binary 126 127head-y := arch/s390/kernel/head64.o 128 129# See arch/s390/Kbuild for content of core part of the kernel 130core-y += arch/s390/ 131 132libs-y += arch/s390/lib/ 133drivers-y += drivers/s390/ 134 135# must be linked after kernel 136drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 137 138boot := arch/s390/boot 139syscalls := arch/s390/kernel/syscalls 140tools := arch/s390/tools 141 142all: bzImage 143 144#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 145KBUILD_IMAGE := $(boot)/bzImage 146 147install: vmlinux 148 $(Q)$(MAKE) $(build)=$(boot) $@ 149 150bzImage: vmlinux 151 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 152 153zfcpdump: 154 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 155 156vdso_install: 157 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 158 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 159 160archclean: 161 $(Q)$(MAKE) $(clean)=$(boot) 162 $(Q)$(MAKE) $(clean)=$(tools) 163 164archheaders: 165 $(Q)$(MAKE) $(build)=$(syscalls) uapi 166 167archprepare: 168 $(Q)$(MAKE) $(build)=$(syscalls) kapi 169 $(Q)$(MAKE) $(build)=$(tools) kapi 170 171# Don't use tabs in echo arguments 172define archhelp 173 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 174 echo ' install - Install kernel using' 175 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 176 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 177 echo ' install to $$(INSTALL_PATH)' 178endef 179