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__ 23KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 24KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 25KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 26KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain 27KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 28KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 29KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector 30KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 31KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 32KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 33UTS_MACHINE := s390x 34STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 35CHECKFLAGS += -D__s390__ -D__s390x__ 36 37export LD_BFD 38 39mflags-$(CONFIG_MARCH_Z900) := -march=z900 40mflags-$(CONFIG_MARCH_Z990) := -march=z990 41mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 42mflags-$(CONFIG_MARCH_Z10) := -march=z10 43mflags-$(CONFIG_MARCH_Z196) := -march=z196 44mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 45mflags-$(CONFIG_MARCH_Z13) := -march=z13 46mflags-$(CONFIG_MARCH_Z14) := -march=z14 47mflags-$(CONFIG_MARCH_Z15) := -march=z15 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-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 62cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 63 64cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 65 66# 67# Prevent tail-call optimizations, to get clearer backtraces: 68# 69cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 70 71ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),) 72cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 73aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 74endif 75 76KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 77KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 78 79ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 80cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 81ifeq ($(call cc-option,-mstack-size=8192),) 82cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 83endif 84endif 85 86ifdef CONFIG_EXPOLINE 87 ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),) 88 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 89 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 90 CC_FLAGS_EXPOLINE += -mindirect-branch-table 91 export CC_FLAGS_EXPOLINE 92 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 93 aflags-y += -DCC_USING_EXPOLINE 94 endif 95endif 96 97ifdef CONFIG_FUNCTION_TRACER 98 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 99 # make use of hotpatch feature if the compiler supports it 100 cc_hotpatch := -mhotpatch=0,3 101 ifneq ($(call cc-option,$(cc_hotpatch)),) 102 CC_FLAGS_FTRACE := $(cc_hotpatch) 103 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 104 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 105 endif 106 endif 107endif 108 109# Test CFI features of binutils 110cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 111 112KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 113KBUILD_CFLAGS += -pipe -Wno-sign-compare 114KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 115KBUILD_AFLAGS += $(aflags-y) $(cfi) 116export KBUILD_AFLAGS_DECOMPRESSOR 117export KBUILD_CFLAGS_DECOMPRESSOR 118 119OBJCOPYFLAGS := -O binary 120 121head-y := arch/s390/kernel/head64.o 122 123libs-y += arch/s390/lib/ 124drivers-y += drivers/s390/ 125 126boot := arch/s390/boot 127syscalls := arch/s390/kernel/syscalls 128tools := arch/s390/tools 129 130all: bzImage 131 132#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 133KBUILD_IMAGE := $(boot)/bzImage 134 135install: 136 sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ 137 System.map "$(INSTALL_PATH)" 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 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 166endif 167 168# Don't use tabs in echo arguments 169define archhelp 170 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 171 echo ' install - Install kernel using' 172 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 173 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 174 echo ' install to $$(INSTALL_PATH)' 175endef 176