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 -mpacked-stack 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), $(call cc-option, -gdwarf-4,)) 33 34ifdef CONFIG_CC_IS_GCC 35 ifeq ($(call cc-ifversion, -ge, 1200, y), y) 36 ifeq ($(call cc-ifversion, -lt, 1300, y), y) 37 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) 38 KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, array-bounds) 39 endif 40 endif 41endif 42 43UTS_MACHINE := s390x 44STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 45CHECKFLAGS += -D__s390__ -D__s390x__ 46 47export LD_BFD 48 49mflags-$(CONFIG_MARCH_Z10) := -march=z10 50mflags-$(CONFIG_MARCH_Z196) := -march=z196 51mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 52mflags-$(CONFIG_MARCH_Z13) := -march=z13 53mflags-$(CONFIG_MARCH_Z14) := -march=z14 54mflags-$(CONFIG_MARCH_Z15) := -march=z15 55mflags-$(CONFIG_MARCH_Z16) := -march=z16 56 57export CC_FLAGS_MARCH := $(mflags-y) 58 59aflags-y += $(mflags-y) 60cflags-y += $(mflags-y) 61 62cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 63cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 64cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 65cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 66cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 67cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 68cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 69 70cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 71 72# 73# Prevent tail-call optimizations, to get clearer backtraces: 74# 75cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 76 77KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 78KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 79 80ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 81 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 82 ifeq ($(call cc-option,-mstack-size=8192),) 83 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 84 endif 85 export CC_FLAGS_CHECK_STACK 86 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 87endif 88 89ifdef CONFIG_EXPOLINE 90 ifdef CONFIG_EXPOLINE_EXTERN 91 KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline.o 92 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 93 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 94 else 95 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 96 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 97 endif 98 CC_FLAGS_EXPOLINE += -mindirect-branch-table 99 export CC_FLAGS_EXPOLINE 100 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 101 aflags-y += -DCC_USING_EXPOLINE 102endif 103 104ifdef CONFIG_FUNCTION_TRACER 105 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 106 # make use of hotpatch feature if the compiler supports it 107 cc_hotpatch := -mhotpatch=0,3 108 ifneq ($(call cc-option,$(cc_hotpatch)),) 109 CC_FLAGS_FTRACE := $(cc_hotpatch) 110 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 111 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 112 endif 113 endif 114endif 115 116# Test CFI features of binutils 117cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 118 119KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 120KBUILD_CFLAGS += -pipe -Wno-sign-compare 121KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 122KBUILD_AFLAGS += $(aflags-y) $(cfi) 123export KBUILD_AFLAGS_DECOMPRESSOR 124export KBUILD_CFLAGS_DECOMPRESSOR 125 126OBJCOPYFLAGS := -O binary 127 128head-y := arch/s390/kernel/head64.o 129 130libs-y += arch/s390/lib/ 131drivers-y += drivers/s390/ 132 133boot := arch/s390/boot 134syscalls := arch/s390/kernel/syscalls 135tools := arch/s390/tools 136 137all: bzImage 138 139#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 140KBUILD_IMAGE := $(boot)/bzImage 141 142install: 143 sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ 144 System.map "$(INSTALL_PATH)" 145 146bzImage: vmlinux 147 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 148 149zfcpdump: 150 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 151 152vdso_install: 153 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 154 155archheaders: 156 $(Q)$(MAKE) $(build)=$(syscalls) uapi 157 158archprepare: 159 $(Q)$(MAKE) $(build)=$(syscalls) kapi 160 $(Q)$(MAKE) $(build)=$(tools) kapi 161ifeq ($(KBUILD_EXTMOD),) 162# We need to generate vdso-offsets.h before compiling certain files in kernel/. 163# In order to do that, we should use the archprepare target, but we can't since 164# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 165# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 166# Therefore we need to generate the header after prepare0 has been made, hence 167# this hack. 168prepare: vdso_prepare 169vdso_prepare: prepare0 170 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 171 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 172 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 173endif 174 175# Don't use tabs in echo arguments 176define archhelp 177 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 178 echo ' install - Install kernel using' 179 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 180 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 181 echo ' install to $$(INSTALL_PATH)' 182endef 183