diff options
Diffstat (limited to 'arch/s390/Makefile')
| -rw-r--r-- | arch/s390/Makefile | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile new file mode 100644 index 0000000000..a53a36ee07 --- /dev/null +++ b/arch/s390/Makefile @@ -0,0 +1,177 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# s390/Makefile +# +# This file is included by the global makefile so that you can add your own +# architecture-specific flags and dependencies. +# +# Copyright (C) 1994 by Linus Torvalds +# + +LD_BFD := elf64-s390 +KBUILD_LDFLAGS := -m elf64_s390 +KBUILD_AFLAGS_MODULE += -fPIC +KBUILD_CFLAGS_MODULE += -fPIC +KBUILD_AFLAGS += -m64 +KBUILD_CFLAGS += -m64 +KBUILD_CFLAGS += -fPIE +LDFLAGS_vmlinux := -pie +aflags_dwarf := -Wa,-gdwarf-2 +KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ +ifndef CONFIG_AS_IS_LLVM +KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) +endif +KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack +KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY +KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain +KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables +KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding +KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector +KBUILD_CFLAGS_DECOMPRESSOR += -fPIE +KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member) +KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) +KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) +KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_CC_NO_ARRAY_BOUNDS),-Wno-array-bounds) + +UTS_MACHINE := s390x +STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) +CHECKFLAGS += -D__s390__ -D__s390x__ + +export LD_BFD + +mflags-$(CONFIG_MARCH_Z10) := -march=z10 +mflags-$(CONFIG_MARCH_Z196) := -march=z196 +mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 +mflags-$(CONFIG_MARCH_Z13) := -march=z13 +mflags-$(CONFIG_MARCH_Z14) := -march=z14 +mflags-$(CONFIG_MARCH_Z15) := -march=z15 +mflags-$(CONFIG_MARCH_Z16) := -march=z16 + +export CC_FLAGS_MARCH := $(mflags-y) + +aflags-y += $(mflags-y) +cflags-y += $(mflags-y) + +cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 +cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 +cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 +cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 +cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 +cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15 +cflags-$(CONFIG_MARCH_Z16_TUNE) += -mtune=z16 + +cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include + +# +# Prevent tail-call optimizations, to get clearer backtraces: +# +cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls + +KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) +KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) + +ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),) + CC_FLAGS_CHECK_STACK := -mstack-size=$(STACK_SIZE) + ifeq ($(call cc-option,-mstack-size=8192),) + CC_FLAGS_CHECK_STACK += -mstack-guard=$(CONFIG_STACK_GUARD) + endif + export CC_FLAGS_CHECK_STACK + cflags-$(CONFIG_CHECK_STACK) += $(CC_FLAGS_CHECK_STACK) +endif + +ifdef CONFIG_EXPOLINE + ifdef CONFIG_EXPOLINE_EXTERN + KBUILD_LDFLAGS_MODULE += arch/s390/lib/expoline/expoline.o + CC_FLAGS_EXPOLINE := -mindirect-branch=thunk-extern + CC_FLAGS_EXPOLINE += -mfunction-return=thunk-extern + else + CC_FLAGS_EXPOLINE := -mindirect-branch=thunk + CC_FLAGS_EXPOLINE += -mfunction-return=thunk + endif + CC_FLAGS_EXPOLINE += -mindirect-branch-table + export CC_FLAGS_EXPOLINE + cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE + aflags-y += -DCC_USING_EXPOLINE +endif + +ifdef CONFIG_FUNCTION_TRACER + ifeq ($(call cc-option,-mfentry -mnop-mcount),) + # make use of hotpatch feature if the compiler supports it + cc_hotpatch := -mhotpatch=0,3 + ifneq ($(call cc-option,$(cc_hotpatch)),) + CC_FLAGS_FTRACE := $(cc_hotpatch) + KBUILD_AFLAGS += -DCC_USING_HOTPATCH + KBUILD_CFLAGS += -DCC_USING_HOTPATCH + endif + endif +endif + +# Test CFI features of binutils +cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) + +KBUILD_CFLAGS += -mpacked-stack -mbackchain -msoft-float $(cflags-y) +KBUILD_CFLAGS += -pipe -Wno-sign-compare +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) +KBUILD_AFLAGS += $(aflags-y) $(cfi) +export KBUILD_AFLAGS_DECOMPRESSOR +export KBUILD_CFLAGS_DECOMPRESSOR + +OBJCOPYFLAGS := -O binary + +libs-y += arch/s390/lib/ + +boot := arch/s390/boot +syscalls := arch/s390/kernel/syscalls +tools := arch/s390/tools + +all: bzImage + +#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... +KBUILD_IMAGE := $(boot)/bzImage + +install: + $(call cmd,install) + +bzImage: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +zfcpdump: + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +vdso_install: + $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ + +archheaders: + $(Q)$(MAKE) $(build)=$(syscalls) uapi + +archprepare: + $(Q)$(MAKE) $(build)=$(syscalls) kapi + $(Q)$(MAKE) $(build)=$(tools) kapi +ifeq ($(KBUILD_EXTMOD),) +# We need to generate vdso-offsets.h before compiling certain files in kernel/. +# In order to do that, we should use the archprepare target, but we can't since +# asm-offsets.h is included in some files used to generate vdso-offsets.h, and +# asm-offsets.h is built in prepare0, for which archprepare is a dependency. +# Therefore we need to generate the header after prepare0 has been made, hence +# this hack. +prepare: vdso_prepare +vdso_prepare: prepare0 + $(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h + $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \ + $(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h) + +ifdef CONFIG_EXPOLINE_EXTERN +modules_prepare: expoline_prepare +expoline_prepare: scripts + $(Q)$(MAKE) $(build)=arch/s390/lib/expoline arch/s390/lib/expoline/expoline.o +endif +endif + +# Don't use tabs in echo arguments +define archhelp + echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' + echo ' install - Install kernel using' + echo ' (your) ~/bin/$(INSTALLKERNEL) or' + echo ' (distribution) /sbin/$(INSTALLKERNEL) or' + echo ' install to $$(INSTALL_PATH)' +endef |