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