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__ 23ifndef CONFIG_AS_IS_LLVM 24KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 25endif 26KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack 27KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 28KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain 29KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 30KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 31KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector 32KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 35UTS_MACHINE := s390x 36STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 37CHECKFLAGS += -D__s390__ -D__s390x__ 38 39export LD_BFD 40 41mflags-$(CONFIG_MARCH_Z10) := -march=z10 42mflags-$(CONFIG_MARCH_Z196) := -march=z196 43mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 44mflags-$(CONFIG_MARCH_Z13) := -march=z13 45mflags-$(CONFIG_MARCH_Z14) := -march=z14 46mflags-$(CONFIG_MARCH_Z15) := -march=z15 47mflags-$(CONFIG_MARCH_Z16) := -march=z16 48 49export CC_FLAGS_MARCH := $(mflags-y) 50 51aflags-y += $(mflags-y) 52cflags-y += $(mflags-y) 53 54cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 55cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 56cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 57cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 58cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 59cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 60cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 61 62cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 63 64# 65# Prevent tail-call optimizations, to get clearer backtraces: 66# 67cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 68 69KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 70KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 71 72ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) 73 CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) 74 ifeq ($(call cc-option,-mstack-size=8192),) 75 CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) 76 endif 77 export CC_FLAGS_CHECK_STACK 78 cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) 79endif 80 81ifdef CONFIG_EXPOLINE 82 ifdef CONFIG_EXPOLINE_EXTERN 83 KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline.o 84 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 85 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 86 else 87 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 88 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 89 endif 90 CC_FLAGS_EXPOLINE += -mindirect-branch-table 91 export CC_FLAGS_EXPOLINE 92 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 93 aflags-y += -DCC_USING_EXPOLINE 94endif 95 96ifdef CONFIG_FUNCTION_TRACER 97 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 98 # make use of hotpatch feature if the compiler supports it 99 cc_hotpatch := -mhotpatch=0,3 100 ifneq ($(call cc-option,$(cc_hotpatch)),) 101 CC_FLAGS_FTRACE := $(cc_hotpatch) 102 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 103 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 104 endif 105 endif 106endif 107 108# Test CFI features of binutils 109cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 110 111KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 112KBUILD_CFLAGS += -pipe -Wno-sign-compare 113KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 114KBUILD_AFLAGS += $(aflags-y) $(cfi) 115export KBUILD_AFLAGS_DECOMPRESSOR 116export KBUILD_CFLAGS_DECOMPRESSOR 117 118OBJCOPYFLAGS := -O binary 119 120head-y := arch/s390/kernel/head64.o 121 122libs-y += arch/s390/lib/ 123drivers-y += drivers/s390/ 124 125boot := arch/s390/boot 126syscalls := arch/s390/kernel/syscalls 127tools := arch/s390/tools 128 129all: bzImage 130 131#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 132KBUILD_IMAGE := $(boot)/bzImage 133 134install: 135 sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \ 136 System.map "$(INSTALL_PATH)" 137 138bzImage: vmlinux 139 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 140 141zfcpdump: 142 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 143 144vdso_install: 145 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 146 147archheaders: 148 $(Q)$(MAKE) $(build)=$(syscalls) uapi 149 150archprepare: 151 $(Q)$(MAKE) $(build)=$(syscalls) kapi 152 $(Q)$(MAKE) $(build)=$(tools) kapi 153ifeq ($(KBUILD_EXTMOD),) 154# We need to generate vdso-offsets.h before compiling certain files in kernel/. 155# In order to do that, we should use the archprepare target, but we can't since 156# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 157# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 158# Therefore we need to generate the header after prepare0 has been made, hence 159# this hack. 160prepare: vdso_prepare 161vdso_prepare: prepare0 162 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 163 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 164 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 165endif 166 167# Don't use tabs in echo arguments 168define archhelp 169 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 170 echo ' install - Install kernel using' 171 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 172 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 173 echo ' install to $$(INSTALL_PATH)' 174endef 175