mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 23:26:45 +07:00
c09d6a04d1
On CPUs which support the LSE atomic instructions introduced in ARMv8.1, it makes sense to use them in preference to ll/sc sequences. This patch introduces runtime patching of atomic_t and atomic64_t routines so that the call-site for the out-of-line ll/sc sequences is patched with an LSE atomic instruction when we detect that the CPU supports it. If binutils is not recent enough to assemble the LSE instructions, then the ll/sc sequences are inlined as though CONFIG_ARM64_LSE_ATOMICS=n. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
112 lines
3.0 KiB
Makefile
112 lines
3.0 KiB
Makefile
#
|
|
# arch/arm64/Makefile
|
|
#
|
|
# 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) 1995-2001 by Russell King
|
|
|
|
LDFLAGS_vmlinux :=-p --no-undefined -X
|
|
CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
|
|
OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
|
|
GZFLAGS :=-9
|
|
|
|
KBUILD_DEFCONFIG := defconfig
|
|
|
|
# Check for binutils support for specific extensions
|
|
lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
|
|
|
|
ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
|
|
ifeq ($(lseinstr),)
|
|
$(warning LSE atomics not supported by binutils)
|
|
endif
|
|
endif
|
|
|
|
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
|
|
KBUILD_AFLAGS += $(lseinstr)
|
|
|
|
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
|
|
KBUILD_CPPFLAGS += -mbig-endian
|
|
AS += -EB
|
|
LD += -EB
|
|
else
|
|
KBUILD_CPPFLAGS += -mlittle-endian
|
|
AS += -EL
|
|
LD += -EL
|
|
endif
|
|
|
|
CHECKFLAGS += -D__aarch64__
|
|
|
|
# Default value
|
|
head-y := arch/arm64/kernel/head.o
|
|
|
|
# The byte offset of the kernel image in RAM from the start of RAM.
|
|
ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
|
|
TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
|
|
else
|
|
TEXT_OFFSET := 0x00080000
|
|
endif
|
|
|
|
export TEXT_OFFSET GZFLAGS
|
|
|
|
core-y += arch/arm64/kernel/ arch/arm64/mm/
|
|
core-$(CONFIG_NET) += arch/arm64/net/
|
|
core-$(CONFIG_KVM) += arch/arm64/kvm/
|
|
core-$(CONFIG_XEN) += arch/arm64/xen/
|
|
core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
|
|
libs-y := arch/arm64/lib/ $(libs-y)
|
|
core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
|
|
|
|
# Default target when executing plain make
|
|
KBUILD_IMAGE := Image.gz
|
|
KBUILD_DTBS := dtbs
|
|
|
|
all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
|
|
|
|
boot := arch/arm64/boot
|
|
|
|
Image: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
Image.%: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
zinstall install: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $@
|
|
|
|
%.dtb: scripts
|
|
$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
|
|
|
|
PHONY += dtbs dtbs_install
|
|
|
|
dtbs: prepare scripts
|
|
$(Q)$(MAKE) $(build)=$(boot)/dts
|
|
|
|
dtbs_install:
|
|
$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
|
|
|
|
PHONY += vdso_install
|
|
vdso_install:
|
|
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
|
|
|
|
# We use MRPROPER_FILES and CLEAN_FILES now
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=$(boot)
|
|
$(Q)$(MAKE) $(clean)=$(boot)/dts
|
|
|
|
define archhelp
|
|
echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
|
|
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
|
|
echo '* dtbs - Build device tree blobs for enabled boards'
|
|
echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
|
|
echo ' install - Install uncompressed kernel'
|
|
echo ' zinstall - Install compressed kernel'
|
|
echo ' Install using (your) ~/bin/installkernel or'
|
|
echo ' (distribution) /sbin/installkernel or'
|
|
echo ' install to $$(INSTALL_PATH) and run lilo'
|
|
endef
|