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