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 17KBUILD_CFLAGS += -fPIC 18LDFLAGS_vmlinux := $(call ld-option,-no-pie) 19extra_tools := relocs 20aflags_dwarf := -Wa,-gdwarf-2 21KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ 22ifndef CONFIG_AS_IS_LLVM 23KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 24endif 25KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack -std=gnu11 -fms-extensions 26KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 27KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR 28KBUILD_CFLAGS_DECOMPRESSOR += -Wno-pointer-sign 29KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain 30KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 31KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding 32KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector 33KBUILD_CFLAGS_DECOMPRESSOR += -fPIE 34KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 36KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 37KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds) 38KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_IS_CLANG),-Wno-microsoft-anon-tag) 39 40UTS_MACHINE := s390x 41STACK_SIZE := $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384)) 42CHECKFLAGS += -D__s390__ -D__s390x__ 43 44export LD_BFD 45 46mflags-$(CONFIG_MARCH_Z10) := -march=z10 47mflags-$(CONFIG_MARCH_Z196) := -march=z196 48mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 49mflags-$(CONFIG_MARCH_Z13) := -march=z13 50mflags-$(CONFIG_MARCH_Z14) := -march=z14 51mflags-$(CONFIG_MARCH_Z15) := -march=z15 52mflags-$(CONFIG_MARCH_Z16) := -march=z16 53mflags-$(CONFIG_MARCH_Z17) := -march=z17 54 55export CC_FLAGS_MARCH := $(mflags-y) 56 57aflags-y += $(mflags-y) 58cflags-y += $(mflags-y) 59 60cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 61cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 62cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 63cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 64cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 65cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 66cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 67cflags-$(CONFIG_MARCH_Z17_TUNE) += -mtune=z17 68 69cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 70 71# 72# Prevent tail-call optimizations, to get clearer backtraces: 73# 74cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 75 76KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 77KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 78 79ifdef CONFIG_EXPOLINE 80 ifdef CONFIG_EXPOLINE_EXTERN 81 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 82 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 83 else 84 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 85 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 86 endif 87 CC_FLAGS_EXPOLINE += -mindirect-branch-table 88 export CC_FLAGS_EXPOLINE 89 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 90 aflags-y += -DCC_USING_EXPOLINE 91endif 92 93ifeq ($(CONFIG_STACKPROTECTOR),y) 94 KBUILD_CFLAGS += -mstack-protector-guard=global -mstack-protector-guard-record 95endif 96 97ifdef CONFIG_FUNCTION_TRACER 98 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 99 # make use of hotpatch feature if the compiler supports it 100 cc_hotpatch := -mhotpatch=0,3 101 ifneq ($(call cc-option,$(cc_hotpatch)),) 102 CC_FLAGS_FTRACE := $(cc_hotpatch) 103 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 104 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 105 endif 106 endif 107endif 108 109# Test CFI features of binutils 110cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 111 112KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 113KBUILD_CFLAGS += -pipe -Wno-sign-compare 114KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 115KBUILD_AFLAGS += $(aflags-y) $(cfi) 116export KBUILD_AFLAGS_DECOMPRESSOR 117export KBUILD_CFLAGS_DECOMPRESSOR 118 119OBJCOPYFLAGS := -O binary 120 121libs-y += arch/s390/lib/ 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 $(call cmd,install) 134 135bzImage: vmlinux 136 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 137 138zfcpdump: 139 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 140 141archheaders: 142 $(Q)$(MAKE) $(build)=$(syscalls) all 143 144archprepare: 145 $(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools) 146ifeq ($(KBUILD_EXTMOD),) 147# We need to generate vdso-offsets.h before compiling certain files in kernel/. 148# In order to do that, we should use the archprepare target, but we can't since 149# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 150# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 151# Therefore we need to generate the header after prepare0 has been made, hence 152# this hack. 153prepare: vdso_prepare 154vdso_prepare: prepare0 155 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso include/generated/vdso-offsets.h 156 157vdso-install-y += arch/s390/kernel/vdso/vdso.so.dbg 158 159endif 160 161# Don't use tabs in echo arguments 162define archhelp 163 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 164 echo ' install - Install kernel using' 165 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 166 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 167 echo ' install to $$(INSTALL_PATH)' 168endef 169