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 += -fPIE 33KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 36 37ifdef CONFIG_CC_IS_GCC 38 ifeq ($(call cc-ifversion, -ge, 1200, y), y) 39 ifeq ($(call cc-ifversion, -lt, 1300, y), y) 40 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 41 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds) 42 endif 43 endif 44endif 45 46UTS_MACHINE := s390x 47STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 48CHECKFLAGS += -D__s390__ -D__s390x__ 49 50export LD_BFD 51 52mflags-$(CONFIG_MARCH_Z900) := -march=z900 53mflags-$(CONFIG_MARCH_Z990) := -march=z990 54mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 55mflags-$(CONFIG_MARCH_Z10) := -march=z10 56mflags-$(CONFIG_MARCH_Z196) := -march=z196 57mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 58mflags-$(CONFIG_MARCH_Z13) := -march=z13 59mflags-$(CONFIG_MARCH_Z14) := -march=z14 60mflags-$(CONFIG_MARCH_Z15) := -march=z15 61 62export CC_FLAGS_MARCH := $(mflags-y) 63 64aflags-y += $(mflags-y) 65cflags-y += $(mflags-y) 66 67cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 68cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 69cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 70cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 71cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 72cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 73cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 74cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 75cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 76 77cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 78 79# 80# Prevent tail-call optimizations, to get clearer backtraces: 81# 82cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 83 84ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),) 85cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 86aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 87endif 88 89KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 90KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 91 92ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 93 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 94 ifeq ($(call cc-option,-mstack-size=8192),) 95 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 96 endif 97 export CC_FLAGS_CHECK_STACK 98 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 99endif 100 101ifdef CONFIG_EXPOLINE 102 ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),) 103 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 104 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 105 CC_FLAGS_EXPOLINE += -mindirect-branch-table 106 export CC_FLAGS_EXPOLINE 107 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 108 aflags-y += -DCC_USING_EXPOLINE 109 endif 110endif 111 112ifdef CONFIG_FUNCTION_TRACER 113 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 114 # make use of hotpatch feature if the compiler supports it 115 cc_hotpatch := -mhotpatch=0,3 116 ifneq ($(call cc-option,$(cc_hotpatch)),) 117 CC_FLAGS_FTRACE := $(cc_hotpatch) 118 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 119 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 120 endif 121 endif 122endif 123 124# Test CFI features of binutils 125cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 126 127KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 128KBUILD_CFLAGS += -pipe -Wno-sign-compare 129KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 130KBUILD_AFLAGS += $(aflags-y) $(cfi) 131export KBUILD_AFLAGS_DECOMPRESSOR 132export KBUILD_CFLAGS_DECOMPRESSOR 133 134OBJCOPYFLAGS := -O binary 135 136head-y := arch/s390/kernel/head64.o 137 138libs-y += arch/s390/lib/ 139drivers-y += drivers/s390/ 140 141boot := arch/s390/boot 142syscalls := arch/s390/kernel/syscalls 143tools := arch/s390/tools 144 145all: bzImage 146 147#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 148KBUILD_IMAGE := $(boot)/bzImage 149 150install: 151 sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ 152 System.map "$(INSTALL_PATH)" 153 154bzImage: vmlinux 155 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 156 157zfcpdump: 158 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 159 160vdso_install: 161 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 162 163archclean: 164 $(Q)$(MAKE) $(clean)=$(boot) 165 $(Q)$(MAKE) $(clean)=$(tools) 166 167archheaders: 168 $(Q)$(MAKE) $(build)=$(syscalls) uapi 169 170archprepare: 171 $(Q)$(MAKE) $(build)=$(syscalls) kapi 172 $(Q)$(MAKE) $(build)=$(tools) kapi 173ifeq ($(KBUILD_EXTMOD),) 174# We need to generate vdso-offsets.h before compiling certain files in kernel/. 175# In order to do that, we should use the archprepare target, but we can't since 176# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 177# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 178# Therefore we need to generate the header after prepare0 has been made, hence 179# this hack. 180prepare: vdso_prepare 181vdso_prepare: prepare0 182 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 183 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 184 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 185endif 186 187# Don't use tabs in echo arguments 188define archhelp 189 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 190 echo ' install - Install kernel using' 191 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 192 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 193 echo ' install to $$(INSTALL_PATH)' 194endef 195