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. 7# 8# Copyright (C) 1994 by Linus Torvalds 9# 10 11LD_BFD := elf64-s390 12KBUILD_LDFLAGS := -m elf64_s390 13KBUILD_AFLAGS_MODULE += -fPIC 14KBUILD_CFLAGS_MODULE += -fPIC 15KBUILD_AFLAGS += -m64 16KBUILD_CFLAGS += -m64 17ifeq ($(CONFIG_RELOCATABLE),y) 18KBUILD_CFLAGS += -fPIE 19LDFLAGS_vmlinux := -pie 20endif 21aflags_dwarf := -Wa,-gdwarf-2 22KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ 23ifndef CONFIG_AS_IS_LLVM 24KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 25endif 26KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack 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,)) 35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds) 36 37UTS_MACHINE := s390x 38STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 39CHECKFLAGS += -D__s390__ -D__s390x__ 40 41export LD_BFD 42 43mflags-$(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-$(CONFIG_MARCH_Z15) := -march=z15 49mflags-$(CONFIG_MARCH_Z16) := -march=z16 50 51export CC_FLAGS_MARCH := $(mflags-y) 52 53aflags-y += $(mflags-y) 54cflags-y += $(mflags-y) 55 56cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 57cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 58cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 59cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 60cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 61cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 62cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 63 64cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 65 66# 67# Prevent tail-call optimizations, to get clearer backtraces: 68# 69cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 70 71KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 72KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 73 74ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 75 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 76 ifeq ($(call cc-option,-mstack-size=8192),) 77 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 78 endif 79 export CC_FLAGS_CHECK_STACK 80 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 81endif 82 83ifdef CONFIG_EXPOLINE 84 ifdef CONFIG_EXPOLINE_EXTERN 85 KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline/expoline.o 86 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 87 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 88 else 89 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 90 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 91 endif 92 CC_FLAGS_EXPOLINE += -mindirect-branch-table 93 export CC_FLAGS_EXPOLINE 94 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 95 aflags-y += -DCC_USING_EXPOLINE 96endif 97 98ifdef CONFIG_FUNCTION_TRACER 99 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 100 # make use of hotpatch feature if the compiler supports it 101 cc_hotpatch := -mhotpatch=0,3 102 ifneq ($(call cc-option,$(cc_hotpatch)),) 103 CC_FLAGS_FTRACE := $(cc_hotpatch) 104 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 105 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 106 endif 107 endif 108endif 109 110# Test CFI features of binutils 111cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 112 113KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 114KBUILD_CFLAGS += -pipe -Wno-sign-compare 115KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 116KBUILD_AFLAGS += $(aflags-y) $(cfi) 117export KBUILD_AFLAGS_DECOMPRESSOR 118export KBUILD_CFLAGS_DECOMPRESSOR 119 120OBJCOPYFLAGS := -O binary 121 122head-y := arch/s390/kernel/head64.o 123 124libs-y += arch/s390/lib/ 125drivers-y += drivers/s390/ 126 127boot := arch/s390/boot 128syscalls := arch/s390/kernel/syscalls 129tools := arch/s390/tools 130 131all: bzImage 132 133#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 134KBUILD_IMAGE := $(boot)/bzImage 135 136install: 137 $(call cmd,install) 138 139bzImage: vmlinux 140 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 141 142zfcpdump: 143 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 144 145vdso_install: 146 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 147 148archheaders: 149 $(Q)$(MAKE) $(build)=$(syscalls) uapi 150 151archprepare: 152 $(Q)$(MAKE) $(build)=$(syscalls) kapi 153 $(Q)$(MAKE) $(build)=$(tools) kapi 154ifeq ($(KBUILD_EXTMOD),) 155# We need to generate vdso-offsets.h before compiling certain files in kernel/. 156# In order to do that, we should use the archprepare target, but we can't since 157# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 158# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 159# Therefore we need to generate the header after prepare0 has been made, hence 160# this hack. 161prepare: vdso_prepare 162vdso_prepare: prepare0 163 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 164 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 165 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 166 167ifdef CONFIG_EXPOLINE_EXTERN 168modules_prepare: expoline_prepare 169expoline_prepare: 170 $(Q)$(MAKE) $(build)=arch/s390/lib/expoline arch/s390/lib/expoline/expoline.o 171endif 172endif 173 174# Don't use tabs in echo arguments 175define archhelp 176 echo '* bzImage - Kernel image for IPL ($(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