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