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-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 72 73ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),) 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 += $(cflags-y) 80 81ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 82cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 83ifeq ($(call cc-option,-mstack-size=8192),) 84cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 85endif 86endif 87 88ifdef CONFIG_EXPOLINE 89 ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),) 90 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 91 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 92 CC_FLAGS_EXPOLINE += -mindirect-branch-table 93 export CC_FLAGS_EXPOLINE 94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 95 aflags-y += -DCC_USING_EXPOLINE 96 endif 97endif 98 99ifdef CONFIG_FUNCTION_TRACER 100 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 101 # make use of hotpatch feature if the compiler supports it 102 cc_hotpatch := -mhotpatch=0,3 103 ifneq ($(call cc-option,$(cc_hotpatch)),) 104 CC_FLAGS_FTRACE := $(cc_hotpatch) 105 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 106 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 107 endif 108 endif 109endif 110 111# Test CFI features of binutils 112cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 113 114KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 115KBUILD_CFLAGS += -pipe -Wno-sign-compare 116KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 117KBUILD_AFLAGS += $(aflags-y) $(cfi) 118export KBUILD_AFLAGS_DECOMPRESSOR 119export KBUILD_CFLAGS_DECOMPRESSOR 120 121OBJCOPYFLAGS := -O binary 122 123head-y := arch/s390/kernel/head64.o 124 125libs-y += arch/s390/lib/ 126drivers-y += drivers/s390/ 127 128boot := arch/s390/boot 129syscalls := arch/s390/kernel/syscalls 130tools := arch/s390/tools 131 132all: bzImage 133 134#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 135KBUILD_IMAGE := $(boot)/bzImage 136 137install: 138 sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ 139 System.map "$(INSTALL_PATH)" 140 141bzImage: vmlinux 142 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 143 144zfcpdump: 145 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 146 147vdso_install: 148 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 149 150archclean: 151 $(Q)$(MAKE) $(clean)=$(boot) 152 $(Q)$(MAKE) $(clean)=$(tools) 153 154archheaders: 155 $(Q)$(MAKE) $(build)=$(syscalls) uapi 156 157archprepare: 158 $(Q)$(MAKE) $(build)=$(syscalls) kapi 159 $(Q)$(MAKE) $(build)=$(tools) kapi 160ifeq ($(KBUILD_EXTMOD),) 161# We need to generate vdso-offsets.h before compiling certain files in kernel/. 162# In order to do that, we should use the archprepare target, but we can't since 163# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 164# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 165# Therefore we need to generate the header after prepare0 has been made, hence 166# this hack. 167prepare: vdso_prepare 168vdso_prepare: prepare0 169 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 170 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 171 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 172endif 173 174# Don't use tabs in echo arguments 175define archhelp 176 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 177 echo ' install - Install kernel using' 178 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 179 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 180 echo ' install to $$(INSTALL_PATH)' 181endef 182