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linux/arch/powerpc/Makefile
Michael Ellerman 4bc06c59f6 Merge branch 'topic/func-desc-lkdtm' into next 
Merge a topic branch we are maintaining with some cross-architecture
changes to function descriptor handling and their use in LKDTM.

From Christophe's cover letter:

Fix LKDTM for PPC64/IA64/PARISC

PPC64/IA64/PARISC have function descriptors. LKDTM doesn't work on those
three architectures because LKDTM messes up function descriptors with
functions.

This series does some cleanup in the three architectures and refactors
function descriptors so that it can then easily use it in a generic way
in LKDTM.
2022-03-07 23:34:32 +11:00

458 lines
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Makefile
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# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994 by Linus Torvalds
# Changes for PPC by Gary Thomas
# Rewritten by Cort Dougan and Paul Mackerras
#
HAS_BIARCH := $(call cc-option-yn, -m32)
# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=
ifeq ($(HAS_BIARCH),y)
ifeq ($(CROSS32_COMPILE),)
ifdef CONFIG_PPC32
# These options will be overridden by any -mcpu option that the CPU
# or platform code sets later on the command line, but they are needed
# to set a sane 32-bit cpu target for the 64-bit cross compiler which
# may default to the wrong ISA.
KBUILD_CFLAGS += -mcpu=powerpc
KBUILD_AFLAGS += -mcpu=powerpc
endif
endif
endif
ifdef CONFIG_PPC_BOOK3S_32
KBUILD_CFLAGS += -mcpu=powerpc
endif
# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
# ppc64_defconfig because we have nothing better to go on.
uname := $(shell uname -m)
KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
ifeq ($(new_nm),y)
NM := $(NM) --synthetic
endif
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
export BITS
ifdef CONFIG_PPC64
BITS := 64
else
BITS := 32
endif
machine-y = ppc
machine-$(CONFIG_PPC64) += 64
machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
UTS_MACHINE := $(subst $(space),,$(machine-y))
# XXX This needs to be before we override LD below
ifdef CONFIG_PPC32
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
else
ifeq ($(call ld-ifversion, -ge, 22500, y),y)
# Have the linker provide sfpr if possible.
# There is a corresponding test in arch/powerpc/lib/Makefile
KBUILD_LDFLAGS_MODULE += --save-restore-funcs
else
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
endif
endif
ifdef CONFIG_CPU_LITTLE_ENDIAN
KBUILD_CFLAGS += -mlittle-endian
KBUILD_LDFLAGS += -EL
LDEMULATION := lppc
GNUTARGET := powerpcle
MULTIPLEWORD := -mno-multiple
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
else
KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
KBUILD_LDFLAGS += -EB
LDEMULATION := ppc
GNUTARGET := powerpc
MULTIPLEWORD := -mmultiple
endif
ifdef CONFIG_PPC64
ifndef CONFIG_CC_IS_CLANG
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
endif
endif
ifndef CONFIG_CC_IS_CLANG
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
endif
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
ifeq ($(HAS_BIARCH),y)
KBUILD_CFLAGS += -m$(BITS)
KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
endif
cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
ifdef CONFIG_PPC64
cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
else
cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
endif
LDFLAGS_vmlinux-y := -Bstatic
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
ifdef CONFIG_PPC64
ifeq ($(call cc-option-yn,-mcmodel=medium),y)
# -mcmodel=medium breaks modules because it uses 32bit offsets from
# the TOC pointer to create pointers where possible. Pointers into the
# percpu data area are created by this method.
#
# The kernel module loader relocates the percpu data section from the
# original location (starting with 0xd...) to somewhere in the base
# kernel percpu data space (starting with 0xc...). We need a full
# 64bit relocation for this to work, hence -mcmodel=large.
KBUILD_CFLAGS_MODULE += -mcmodel=large
else
export NO_MINIMAL_TOC := -mno-minimal-toc
endif
endif
CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
ifndef CONFIG_CC_IS_CLANG
ifdef CONFIG_CPU_LITTLE_ENDIAN
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
else
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
endif
endif
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
# Clang unconditionally reserves r2 on ppc32 and does not support the flag
# https://bugs.llvm.org/show_bug.cgi?id=39555
CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
# Clang doesn't support -mmultiple / -mno-multiple
# https://bugs.llvm.org/show_bug.cgi?id=39556
CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
ifdef CONFIG_PPC_BOOK3S_64
ifdef CONFIG_CPU_LITTLE_ENDIAN
CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
else
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
endif
else ifdef CONFIG_PPC_BOOK3E_64
CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
endif
ifdef CONFIG_FUNCTION_TRACER
CC_FLAGS_FTRACE := -pg
ifdef CONFIG_MPROFILE_KERNEL
CC_FLAGS_FTRACE += -mprofile-kernel
endif
endif
CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
# Altivec option not allowed with e500mc64 in GCC.
ifdef CONFIG_ALTIVEC
E5500_CPU := -mcpu=powerpc64
else
E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
endif
CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
ifdef CONFIG_PPC32
ifdef CONFIG_PPC_E500MC
CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
else
CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
endif
endif
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
KBUILD_AFLAGS += $(AFLAGS-y)
KBUILD_CFLAGS += $(call cc-option,-msoft-float)
KBUILD_CFLAGS += -pipe $(CFLAGS-y)
CPP = $(CC) -E $(KBUILD_CFLAGS)
CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
ifdef CONFIG_CPU_BIG_ENDIAN
CHECKFLAGS += -D__BIG_ENDIAN__
else
CHECKFLAGS += -D__LITTLE_ENDIAN__ -D_CALL_ELF=2
endif
ifdef CONFIG_476FPE_ERR46
KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
endif
# No AltiVec or VSX instructions when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
# No SPE instruction when building kernel
# (We use all available options to help semi-broken compilers)
KBUILD_CFLAGS += $(call cc-option,-mno-spe)
KBUILD_CFLAGS += $(call cc-option,-mspe=no)
# Don't emit .eh_frame since we have no use for it
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS += $(call cc-option,-mno-string)
cpu-as-$(CONFIG_40x) += -Wa,-m405
cpu-as-$(CONFIG_44x) += -Wa,-m440
cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
cpu-as-$(CONFIG_E500) += -Wa,-me500
# When using '-many -mpower4' gas will first try and find a matching power4
# mnemonic and failing that it will allow any valid mnemonic that GAS knows
# about. GCC will pass -many to GAS when assembling, clang does not.
# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675
# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many)
cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
KBUILD_AFLAGS += $(cpu-as-y)
KBUILD_CFLAGS += $(cpu-as-y)
KBUILD_AFLAGS += $(aflags-y)
KBUILD_CFLAGS += $(cflags-y)
head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
# Default to zImage, override when needed
all: zImage
# With make 3.82 we cannot mix normal and wildcard targets
BOOT_TARGETS1 := zImage zImage.initrd uImage
BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
boot := arch/$(ARCH)/boot
$(BOOT_TARGETS1): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
$(BOOT_TARGETS2): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
PHONY += bootwrapper_install
bootwrapper_install:
$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
# Used to create 'merged defconfigs'
# To use it $(call) it with the first argument as the base defconfig
# and the second argument as a space separated list of .config files to merge,
# without the .config suffix.
define merge_into_defconfig
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
endef
PHONY += pseries_le_defconfig
pseries_le_defconfig:
$(call merge_into_defconfig,pseries_defconfig,le)
PHONY += ppc64le_defconfig
ppc64le_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,le)
PHONY += ppc64le_guest_defconfig
ppc64le_guest_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,le guest)
PHONY += ppc64_guest_defconfig
ppc64_guest_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,be guest)
PHONY += powernv_be_defconfig
powernv_be_defconfig:
$(call merge_into_defconfig,powernv_defconfig,be)
PHONY += mpc85xx_defconfig
mpc85xx_defconfig:
$(call merge_into_defconfig,mpc85xx_base.config,\
85xx-32bit 85xx-hw fsl-emb-nonhw)
PHONY += mpc85xx_smp_defconfig
mpc85xx_smp_defconfig:
$(call merge_into_defconfig,mpc85xx_base.config,\
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
PHONY += corenet32_smp_defconfig
corenet32_smp_defconfig:
$(call merge_into_defconfig,corenet_base.config,\
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
PHONY += corenet64_smp_defconfig
corenet64_smp_defconfig:
$(call merge_into_defconfig,corenet_base.config,\
85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
PHONY += mpc86xx_defconfig
mpc86xx_defconfig:
$(call merge_into_defconfig,mpc86xx_base.config,\
86xx-hw fsl-emb-nonhw)
PHONY += mpc86xx_smp_defconfig
mpc86xx_smp_defconfig:
$(call merge_into_defconfig,mpc86xx_base.config,\
86xx-smp 86xx-hw fsl-emb-nonhw)
PHONY += ppc32_allmodconfig
ppc32_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
-f $(srctree)/Makefile allmodconfig
PHONY += ppc_defconfig
ppc_defconfig:
$(call merge_into_defconfig,book3s_32.config,)
PHONY += ppc64le_allmodconfig
ppc64le_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
-f $(srctree)/Makefile allmodconfig
PHONY += ppc64le_allnoconfig
ppc64le_allnoconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
-f $(srctree)/Makefile allnoconfig
PHONY += ppc64_book3e_allmodconfig
ppc64_book3e_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
-f $(srctree)/Makefile allmodconfig
PHONY += ppc32_randconfig
ppc32_randconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
-f $(srctree)/Makefile randconfig
PHONY += ppc64_randconfig
ppc64_randconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
-f $(srctree)/Makefile randconfig
define archhelp
@echo '* zImage - Build default images selected by kernel config'
@echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
@echo ' uImage - U-Boot native image format'
@echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
@echo ' versions which do not support device trees'
@echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
@echo ' simpleImage.<dt> - Firmware independent image.'
@echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
@echo ' install - Install kernel using'
@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
@echo ' install to $$(INSTALL_PATH) and run lilo'
@echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
@echo ''
@echo ' Targets with <dt> embed a device tree blob inside the image'
@echo ' These targets support board with firmware that does not'
@echo ' support passing a device tree directly. Replace <dt> with the'
@echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
@echo ' (minus the .dts extension).'
endef
PHONY += install
install:
sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \
System.map "$(INSTALL_PATH)"
ifeq ($(KBUILD_EXTMOD),)
# We need to generate vdso-offsets.h before compiling certain files in kernel/.
# In order to do that, we should use the archprepare target, but we can't since
# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
# Therefore we need to generate the header after prepare0 has been made, hence
# this hack.
prepare: vdso_prepare
vdso_prepare: prepare0
$(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
$(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
$(if $(CONFIG_PPC64),$(Q)$(MAKE) \
$(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
endif
archprepare: checkbin
archheaders:
$(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
ifdef CONFIG_STACKPROTECTOR
prepare: stack_protector_prepare
PHONY += stack_protector_prepare
stack_protector_prepare: prepare0
ifdef CONFIG_PPC64
$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
else
$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
endif
endif
PHONY += checkbin
# Check toolchain versions:
# - gcc-4.6 is the minimum kernel-wide version so nothing required.
checkbin:
@if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \
"x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \
echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
echo 'in some circumstances.' ; \
echo '*** binutils 2.23 do not define the TOC symbol ' ; \
echo -n '*** Please use a different binutils version.' ; \
false ; \
fi
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