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 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) 38 39UTS_MACHINE := s390x 40STACK_SIZE := $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384)) 41CHECKFLAGS += -D__s390__ -D__s390x__ 42 43export LD_BFD 44 45mflags-$(CONFIG_MARCH_Z10) := -march=z10 46mflags-$(CONFIG_MARCH_Z196) := -march=z196 47mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 48mflags-$(CONFIG_MARCH_Z13) := -march=z13 49mflags-$(CONFIG_MARCH_Z14) := -march=z14 50mflags-$(CONFIG_MARCH_Z15) := -march=z15 51mflags-$(CONFIG_MARCH_Z16) := -march=z16 52mflags-$(CONFIG_MARCH_Z17) := -march=z17 53 54export CC_FLAGS_MARCH := $(mflags-y) 55 56aflags-y += $(mflags-y) 57cflags-y += $(mflags-y) 58 59cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 60cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 61cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 62cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 63cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 64cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 65cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 66cflags-$(CONFIG_MARCH_Z17_TUNE) += -mtune=z17 67 68cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 69 70# 71# Prevent tail-call optimizations, to get clearer backtraces: 72# 73cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 74 75KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 76KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 77 78ifdef CONFIG_EXPOLINE 79 ifdef CONFIG_EXPOLINE_EXTERN 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 116libs-y += arch/s390/lib/ 117 118boot := arch/s390/boot 119syscalls := arch/s390/kernel/syscalls 120tools := arch/s390/tools 121 122all: bzImage 123 124#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 125KBUILD_IMAGE := $(boot)/bzImage 126 127install: 128 $(call cmd,install) 129 130bzImage: vmlinux 131 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 132 133zfcpdump: 134 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 135 136archheaders: 137 $(Q)$(MAKE) $(build)=$(syscalls) uapi 138 139archprepare: 140 $(Q)$(MAKE) $(build)=$(syscalls) kapi 141 $(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools) 142ifeq ($(KBUILD_EXTMOD),) 143# We need to generate vdso-offsets.h before compiling certain files in kernel/. 144# In order to do that, we should use the archprepare target, but we can't since 145# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 146# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 147# Therefore we need to generate the header after prepare0 has been made, hence 148# this hack. 149prepare: vdso_prepare 150vdso_prepare: prepare0 151 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 152 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 153 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 154 155vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg 156vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg 157 158endif 159 160# Don't use tabs in echo arguments 161define archhelp 162 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 163 echo ' install - Install kernel using' 164 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 165 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 166 echo ' install to $$(INSTALL_PATH)' 167endef 168