mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-08 09:16:40 +07:00
98679fb092
The ppc64 ABI has a static chain register (r11) which is only used when calling nested functions through a pointer. Considering that we take a dim view of nested functions in the kernel, we have a lot of unnecessary overhead here. gcc 4.7 has an option to disable loading of r11 so lets use it. If hell freezes over and hipsters manage to litter the kernel with nested functions, gcc will give us an error message and won't simply compile bad code: You cannot take the address of a nested function if you use the -mno-pointers-to-nested-functions option. Furthermore our kernel module trampolines don't setup the static chain register so adding this option and forcing gcc to error out makes even more sense. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
277 lines
9.2 KiB
Makefile
277 lines
9.2 KiB
Makefile
# This file is included by the global makefile so that you can add your own
|
|
# architecture-specific flags and dependencies. Remember to do have actions
|
|
# for "archclean" and "archdep" for cleaning up and making dependencies for
|
|
# this architecture.
|
|
#
|
|
# 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 ?=
|
|
|
|
CROSS32CC := $(CROSS32_COMPILE)gcc
|
|
CROSS32AR := $(CROSS32_COMPILE)ar
|
|
|
|
ifeq ($(HAS_BIARCH),y)
|
|
ifeq ($(CROSS32_COMPILE),)
|
|
CROSS32CC := $(CC) -m32
|
|
CROSS32AR := GNUTARGET=elf32-powerpc $(AR)
|
|
endif
|
|
endif
|
|
|
|
export CROSS32CC CROSS32AR
|
|
|
|
ifeq ($(CROSS_COMPILE),)
|
|
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
|
|
else
|
|
KBUILD_DEFCONFIG := ppc64_defconfig
|
|
endif
|
|
|
|
ifeq ($(CONFIG_PPC64),y)
|
|
OLDARCH := ppc64
|
|
|
|
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
|
|
|
|
ifeq ($(new_nm),y)
|
|
NM := $(NM) --synthetic
|
|
endif
|
|
|
|
else
|
|
OLDARCH := ppc
|
|
endif
|
|
|
|
# It seems there are times we use this Makefile without
|
|
# including the config file, but this replicates the old behaviour
|
|
ifeq ($(CONFIG_WORD_SIZE),)
|
|
CONFIG_WORD_SIZE := 32
|
|
endif
|
|
|
|
UTS_MACHINE := $(OLDARCH)
|
|
|
|
ifeq ($(HAS_BIARCH),y)
|
|
override AS += -a$(CONFIG_WORD_SIZE)
|
|
override LD += -m elf$(CONFIG_WORD_SIZE)ppc
|
|
override CC += -m$(CONFIG_WORD_SIZE)
|
|
override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
|
|
endif
|
|
|
|
LDFLAGS_vmlinux-y := -Bstatic
|
|
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
|
|
LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
|
|
|
|
ifeq ($(CONFIG_PPC64),y)
|
|
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) := -mtraceback=no -mcall-aixdesc
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,-mminimal-toc)
|
|
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
|
|
CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
|
|
|
|
CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
|
|
CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
|
|
CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
|
|
CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
|
|
CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
|
|
CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
|
|
|
|
CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
|
|
|
|
KBUILD_CPPFLAGS += -Iarch/$(ARCH)
|
|
KBUILD_AFLAGS += -Iarch/$(ARCH)
|
|
KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
|
|
CPP = $(CC) -E $(KBUILD_CFLAGS)
|
|
|
|
CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
|
|
|
|
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
|
|
|
|
# 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)
|
|
|
|
# Enable unit-at-a-time mode when possible. It shrinks the
|
|
# kernel considerably.
|
|
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
|
|
|
|
# FIXME: the module load should be taught about the additional relocs
|
|
# generated by this.
|
|
# revert to pre-gcc-4.4 behaviour of .eh_frame
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
|
|
|
|
# Never use string load/store instructions as they are
|
|
# often slow when they are implemented at all
|
|
KBUILD_CFLAGS += -mno-string
|
|
|
|
ifeq ($(CONFIG_6xx),y)
|
|
KBUILD_CFLAGS += -mcpu=powerpc
|
|
endif
|
|
|
|
# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
|
|
ifeq ($(CONFIG_FUNCTION_TRACER),y)
|
|
KBUILD_CFLAGS += -mno-sched-epilog
|
|
endif
|
|
|
|
cpu-as-$(CONFIG_4xx) += -Wa,-m405
|
|
cpu-as-$(CONFIG_ALTIVEC) += -Wa,-maltivec
|
|
cpu-as-$(CONFIG_E500) += -Wa,-me500
|
|
cpu-as-$(CONFIG_E200) += -Wa,-me200
|
|
|
|
KBUILD_AFLAGS += $(cpu-as-y)
|
|
KBUILD_CFLAGS += $(cpu-as-y)
|
|
|
|
head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
|
|
head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
|
|
head-$(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
|
|
|
|
core-y += arch/powerpc/kernel/ \
|
|
arch/powerpc/mm/ \
|
|
arch/powerpc/lib/ \
|
|
arch/powerpc/sysdev/ \
|
|
arch/powerpc/platforms/ \
|
|
arch/powerpc/math-emu/ \
|
|
arch/powerpc/crypto/ \
|
|
arch/powerpc/net/
|
|
core-$(CONFIG_XMON) += arch/powerpc/xmon/
|
|
core-$(CONFIG_KVM) += arch/powerpc/kvm/
|
|
core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/
|
|
|
|
drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
|
|
|
|
# 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
|
|
|
|
ifeq ($(CONFIG_RELOCATABLE),y)
|
|
quiet_cmd_relocs_check = CALL $<
|
|
cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
|
|
|
|
PHONY += relocs_check
|
|
relocs_check: arch/powerpc/relocs_check.pl vmlinux
|
|
$(call cmd,relocs_check)
|
|
|
|
zImage: relocs_check
|
|
endif
|
|
|
|
$(BOOT_TARGETS1): vmlinux
|
|
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
$(BOOT_TARGETS2): vmlinux
|
|
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
|
|
bootwrapper_install:
|
|
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
%.dtb: scripts
|
|
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
|
|
|
|
define archhelp
|
|
@echo '* zImage - Build default images selected by kernel config'
|
|
@echo ' zImage.* - Compressed kernel image (arch/$(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
|
|
|
|
install:
|
|
$(Q)$(MAKE) $(build)=$(boot) install
|
|
|
|
vdso_install:
|
|
ifeq ($(CONFIG_PPC64),y)
|
|
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
|
|
endif
|
|
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
|
|
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=$(boot)
|
|
|
|
archprepare: checkbin
|
|
|
|
# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
|
|
# to stdout and these checks are run even on install targets.
|
|
TOUT := .tmp_gas_check
|
|
|
|
# Check gcc and binutils versions:
|
|
# - gcc-3.4 and binutils-2.14 are a fatal combination
|
|
# - Require gcc 4.0 or above on 64-bit
|
|
# - gcc-4.2.0 has issues compiling modules on 64-bit
|
|
checkbin:
|
|
@if test "$(call cc-version)" = "0304" ; then \
|
|
if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
|
|
echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
|
|
echo 'correctly with gcc-3.4 and your version of binutils.'; \
|
|
echo '*** Please upgrade your binutils or downgrade your gcc'; \
|
|
false; \
|
|
fi ; \
|
|
fi
|
|
@if test "$(call cc-version)" -lt "0400" \
|
|
&& test "x${CONFIG_PPC64}" = "xy" ; then \
|
|
echo -n "Sorry, GCC v4.0 or above is required to build " ; \
|
|
echo "the 64-bit powerpc kernel." ; \
|
|
false ; \
|
|
fi
|
|
@if test "$(call cc-fullversion)" = "040200" \
|
|
&& test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
|
|
echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
|
|
echo 'kernel with modules enabled.' ; \
|
|
echo -n '*** Please use a different GCC version or ' ; \
|
|
echo 'disable kernel modules' ; \
|
|
false ; \
|
|
fi
|
|
|
|
CLEAN_FILES += $(TOUT)
|
|
|