mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 16:41:58 +00:00
4efd417f29
Machine generations up to z9 (released in May 2006) have been officially out of service for several years now (z9 end of service - January 31, 2019). No distributions build kernels supporting those old machine generations anymore, except Debian, which seems to pick the oldest supported generation. The team supporting Debian on s390 has been notified about the change. Raising minimum supported machine generation to z10 helps to reduce maintenance cost and effectively remove code, which is not getting enough testing coverage due to lack of older hardware and distributions support. Besides that this unblocks some optimization opportunities and allows to use wider instruction set in asm files for future features implementation. Due to this change spectre mitigation and usercopy implementations could be drastically simplified and many newer instructions could be converted from ".insn" encoding to instruction names. Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
171 lines
5.6 KiB
Makefile
171 lines
5.6 KiB
Makefile
# 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
|
|
ifeq ($(CONFIG_RELOCATABLE),y)
|
|
KBUILD_CFLAGS += -fPIE
|
|
LDFLAGS_vmlinux := -pie
|
|
endif
|
|
aflags_dwarf := -Wa,-gdwarf-2
|
|
KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__
|
|
KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
|
|
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 += $(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,))
|
|
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
|
|
|
|
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-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
|
|
|
|
cflags-y += -Wa,-I$(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.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
|
|
|
|
head-y := arch/s390/kernel/head64.o
|
|
|
|
libs-y += arch/s390/lib/
|
|
drivers-y += drivers/s390/
|
|
|
|
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:
|
|
sh -x $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
|
|
System.map "$(INSTALL_PATH)"
|
|
|
|
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) \
|
|
$(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
|
|
endif
|
|
|
|
# Don't use tabs in echo arguments
|
|
define archhelp
|
|
echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
|
|
echo ' install - Install kernel using'
|
|
echo ' (your) ~/bin/$(INSTALLKERNEL) or'
|
|
echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
|
|
echo ' install to $$(INSTALL_PATH)'
|
|
endef
|