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. Remember to do have actions 7# for "archclean" and "archdep" for cleaning up and making dependencies for 8# this architecture 9# 10# Copyright (C) 1994 by Linus Torvalds 11# 12 13LD_BFD := elf64-s390 14LDFLAGS := -m elf64_s390 15KBUILD_AFLAGS_MODULE += -fPIC 16KBUILD_CFLAGS_MODULE += -fPIC 17KBUILD_CFLAGS += -m64 18KBUILD_AFLAGS += -m64 19UTS_MACHINE := s390x 20STACK_SIZE := 16384 21CHECKFLAGS += -D__s390__ -D__s390x__ -mbig-endian 22 23export LD_BFD 24 25mflags-$(CONFIG_MARCH_Z900) := -march=z900 26mflags-$(CONFIG_MARCH_Z990) := -march=z990 27mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 28mflags-$(CONFIG_MARCH_Z10) := -march=z10 29mflags-$(CONFIG_MARCH_Z196) := -march=z196 30mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 31mflags-$(CONFIG_MARCH_Z13) := -march=z13 32mflags-$(CONFIG_MARCH_Z14) := -march=z14 33 34export CC_FLAGS_MARCH := $(mflags-y) 35 36aflags-y += $(mflags-y) 37cflags-y += $(mflags-y) 38 39cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 40cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 41cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 42cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 43cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 44cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 45cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 46cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 47 48cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 49 50#KBUILD_IMAGE is necessary for make rpm 51KBUILD_IMAGE :=arch/s390/boot/image 52 53# 54# Prevent tail-call optimizations, to get clearer backtraces: 55# 56cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 57 58# old style option for packed stacks 59ifeq ($(call cc-option-yn,-mkernel-backchain),y) 60cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK 61aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 62endif 63 64# new style option for packed stacks 65ifeq ($(call cc-option-yn,-mpacked-stack),y) 66cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 67aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 68endif 69 70ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 71cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 72ifneq ($(call cc-option-yn,-mstack-size=8192),y) 73cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 74endif 75endif 76 77ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 78cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack 79endif 80 81ifdef CONFIG_EXPOLINE 82 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 83 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 84 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 85 CC_FLAGS_EXPOLINE += -mindirect-branch-table 86 export CC_FLAGS_EXPOLINE 87 cflags-y += $(CC_FLAGS_EXPOLINE) 88 endif 89endif 90 91ifdef CONFIG_FUNCTION_TRACER 92# make use of hotpatch feature if the compiler supports it 93cc_hotpatch := -mhotpatch=0,3 94ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 95CC_FLAGS_FTRACE := $(cc_hotpatch) 96KBUILD_AFLAGS += -DCC_USING_HOTPATCH 97KBUILD_CFLAGS += -DCC_USING_HOTPATCH 98endif 99endif 100 101# Test CFI features of binutils 102cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 103 104KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 105KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare 106KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 107KBUILD_AFLAGS += $(aflags-y) $(cfi) 108 109OBJCOPYFLAGS := -O binary 110 111head-y := arch/s390/kernel/head.o 112head-y += arch/s390/kernel/head64.o 113 114# See arch/s390/Kbuild for content of core part of the kernel 115core-y += arch/s390/ 116 117libs-y += arch/s390/lib/ 118drivers-y += drivers/s390/ 119 120# must be linked after kernel 121drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 122 123boot := arch/s390/boot 124syscalls := arch/s390/kernel/syscalls 125tools := arch/s390/tools 126 127all: image bzImage 128 129install: vmlinux 130 $(Q)$(MAKE) $(build)=$(boot) $@ 131 132image bzImage: vmlinux 133 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 134 135zfcpdump: 136 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 137 138vdso_install: 139 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 140 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 141 142archclean: 143 $(Q)$(MAKE) $(clean)=$(boot) 144 $(Q)$(MAKE) $(clean)=$(tools) 145 146archheaders: 147 $(Q)$(MAKE) $(build)=$(syscalls) uapi 148 149archprepare: 150 $(Q)$(MAKE) $(build)=$(syscalls) kapi 151 $(Q)$(MAKE) $(build)=$(tools) kapi 152 153# Don't use tabs in echo arguments 154define archhelp 155 echo '* image - Kernel image for IPL ($(boot)/image)' 156 echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)' 157 echo ' install - Install kernel using' 158 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 159 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 160 echo ' install to $$(INSTALL_PATH)' 161endef 162