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),) 80 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 81 ifeq ($(call cc-option,-mstack-size=8192),) 82 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 83 endif 84 export CC_FLAGS_CHECK_STACK 85 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 86endif 87 88ifdef CONFIG_EXPOLINE 89 ifneq ($(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 150archheaders: 151 $(Q)$(MAKE) $(build)=$(syscalls) uapi 152 153archprepare: 154 $(Q)$(MAKE) $(build)=$(syscalls) kapi 155 $(Q)$(MAKE) $(build)=$(tools) kapi 156ifeq ($(KBUILD_EXTMOD),) 157# We need to generate vdso-offsets.h before compiling certain files in kernel/. 158# In order to do that, we should use the archprepare target, but we can't since 159# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 160# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 161# Therefore we need to generate the header after prepare0 has been made, hence 162# this hack. 163prepare: vdso_prepare 164vdso_prepare: prepare0 165 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 166 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 167 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 168endif 169 170# Don't use tabs in echo arguments 171define archhelp 172 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 173 echo ' install - Install kernel using' 174 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 175 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 176 echo ' install to $$(INSTALL_PATH)' 177endef 178