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 += -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 += -fPIE 33KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) 34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 35KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 36KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds) 37 38UTS_MACHINE := s390x 39STACK_SIZE := $(if $(CONFIG_KASAN),65536,$(if $(CONFIG_KMSAN),65536,16384)) 40CHECKFLAGS += -D__s390__ -D__s390x__ 41 42export LD_BFD 43 44mflags-$(CONFIG_MARCH_Z10) := -march=z10 45mflags-$(CONFIG_MARCH_Z196) := -march=z196 46mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 47mflags-$(CONFIG_MARCH_Z13) := -march=z13 48mflags-$(CONFIG_MARCH_Z14) := -march=z14 49mflags-$(CONFIG_MARCH_Z15) := -march=z15 50mflags-$(CONFIG_MARCH_Z16) := -march=z16 51mflags-$(CONFIG_MARCH_Z17) := -march=z17 52 53export CC_FLAGS_MARCH := $(mflags-y) 54 55aflags-y += $(mflags-y) 56cflags-y += $(mflags-y) 57 58cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 59cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 60cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 61cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 62cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 63cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 64cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 65cflags-$(CONFIG_MARCH_Z17_TUNE) += -mtune=z17 66 67cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 68 69# 70# Prevent tail-call optimizations, to get clearer backtraces: 71# 72cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 73 74KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 75KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 76 77ifdef CONFIG_EXPOLINE 78 ifdef CONFIG_EXPOLINE_EXTERN 79 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern 80 CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern 81 else 82 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 83 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 84 endif 85 CC_FLAGS_EXPOLINE += -mindirect-branch-table 86 export CC_FLAGS_EXPOLINE 87 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 88 aflags-y += -DCC_USING_EXPOLINE 89endif 90 91ifdef CONFIG_FUNCTION_TRACER 92 ifeq ($(call cc-option,-mfentry -mnop-mcount),) 93 # make use of hotpatch feature if the compiler supports it 94 cc_hotpatch := -mhotpatch=0,3 95 ifneq ($(call cc-option,$(cc_hotpatch)),) 96 CC_FLAGS_FTRACE := $(cc_hotpatch) 97 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 98 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 99 endif 100 endif 101endif 102 103# Test CFI features of binutils 104cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 105 106KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) 107KBUILD_CFLAGS += -pipe -Wno-sign-compare 108KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 109KBUILD_AFLAGS += $(aflags-y) $(cfi) 110export KBUILD_AFLAGS_DECOMPRESSOR 111export KBUILD_CFLAGS_DECOMPRESSOR 112 113OBJCOPYFLAGS := -O binary 114 115libs-y += arch/s390/lib/ 116 117boot := arch/s390/boot 118syscalls := arch/s390/kernel/syscalls 119tools := arch/s390/tools 120 121all: bzImage 122 123#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 124KBUILD_IMAGE := $(boot)/bzImage 125 126install: 127 $(call cmd,install) 128 129bzImage: vmlinux 130 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 131 132zfcpdump: 133 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 134 135archheaders: 136 $(Q)$(MAKE) $(build)=$(syscalls) uapi 137 138archprepare: 139 $(Q)$(MAKE) $(build)=$(syscalls) kapi 140 $(Q)$(MAKE) $(build)=$(tools) kapi $(extra_tools) 141ifeq ($(KBUILD_EXTMOD),) 142# We need to generate vdso-offsets.h before compiling certain files in kernel/. 143# In order to do that, we should use the archprepare target, but we can't since 144# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 145# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 146# Therefore we need to generate the header after prepare0 has been made, hence 147# this hack. 148prepare: vdso_prepare 149vdso_prepare: prepare0 150 $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h 151 $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ 152 $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) 153 154vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg 155vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg 156 157endif 158 159# Don't use tabs in echo arguments 160define archhelp 161 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 162 echo ' install - Install kernel using' 163 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 164 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 165 echo ' install to $$(INSTALL_PATH)' 166endef 167