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ab4ce9831a
The Image.* targets existed for other compressors already. Bootloader
support is needed for decompression.
This is for CONFIG_EFI_ZBOOT=n. With CONFIG_EFI_ZBOOT=y, XZ was already
available.
Comparision with Linux 6.10 RV64GC tinyconfig (in KiB):
1027 Image
594 Image.gz
541 Image.zst
510 Image.lzma
474 Image.xz
Link: https://lkml.kernel.org/r/20240721133633.47721-17-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Sam James <sam@gentoo.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
238 lines
8.0 KiB
Makefile
238 lines
8.0 KiB
Makefile
# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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LDFLAGS_vmlinux := -z norelro
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ifeq ($(CONFIG_RELOCATABLE),y)
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LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --emit-relocs
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KBUILD_CFLAGS += -fPIE
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endif
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ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
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LDFLAGS_vmlinux += --no-relax
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KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
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ifeq ($(CONFIG_RISCV_ISA_C),y)
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CC_FLAGS_FTRACE := -fpatchable-function-entry=4
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else
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CC_FLAGS_FTRACE := -fpatchable-function-entry=2
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endif
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endif
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ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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KBUILD_CFLAGS_MODULE += -mcmodel=medany
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endif
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export BITS
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ifeq ($(CONFIG_ARCH_RV64I),y)
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BITS := 64
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UTS_MACHINE := riscv64
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KBUILD_CFLAGS += -mabi=lp64
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KBUILD_AFLAGS += -mabi=lp64
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KBUILD_LDFLAGS += -melf64lriscv
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KBUILD_RUSTFLAGS += -Ctarget-cpu=generic-rv64 --target=riscv64imac-unknown-none-elf \
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-Cno-redzone
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else
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BITS := 32
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UTS_MACHINE := riscv32
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KBUILD_CFLAGS += -mabi=ilp32
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KBUILD_AFLAGS += -mabi=ilp32
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KBUILD_LDFLAGS += -melf32lriscv
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endif
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ifndef CONFIG_RISCV_USE_LINKER_RELAXATION
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KBUILD_CFLAGS += -mno-relax
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KBUILD_AFLAGS += -mno-relax
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ifndef CONFIG_AS_IS_LLVM
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KBUILD_CFLAGS += -Wa,-mno-relax
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KBUILD_AFLAGS += -Wa,-mno-relax
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endif
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# LLVM has an issue with target-features and LTO: https://github.com/llvm/llvm-project/issues/59350
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# Ensure it is aware of linker relaxation with LTO, otherwise relocations may
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# be incorrect: https://github.com/llvm/llvm-project/issues/65090
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else ifeq ($(CONFIG_LTO_CLANG),y)
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KBUILD_LDFLAGS += -mllvm -mattr=+c -mllvm -mattr=+relax
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endif
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ifeq ($(CONFIG_SHADOW_CALL_STACK),y)
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KBUILD_LDFLAGS += --no-relax-gp
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endif
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# ISA string setting
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riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
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riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
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riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
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riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
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riscv-march-$(CONFIG_RISCV_ISA_V) := $(riscv-march-y)v
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ifneq ($(CONFIG_RISCV_ISA_C),y)
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KBUILD_RUSTFLAGS += -Ctarget-feature=-c
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endif
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ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
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KBUILD_CFLAGS += -Wa,-misa-spec=2.2
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KBUILD_AFLAGS += -Wa,-misa-spec=2.2
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else
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riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei
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endif
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# Remove F,D,V from isa string for all. Keep extensions between "fd" and "v" by
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# matching non-v and non-multi-letter extensions out with the filter ([^v_]*)
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KBUILD_CFLAGS += -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)fd([^v_]*)v?/\1\2/')
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KBUILD_AFLAGS += -march=$(riscv-march-y)
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# For C code built with floating-point support, exclude V but keep F and D.
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CC_FLAGS_FPU := -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)([^v_]*)v?/\1\2/')
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KBUILD_CFLAGS += -mno-save-restore
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KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
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ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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KBUILD_CFLAGS += -mcmodel=medlow
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endif
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ifeq ($(CONFIG_CMODEL_MEDANY),y)
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KBUILD_CFLAGS += -mcmodel=medany
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endif
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# Avoid generating .eh_frame sections.
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
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# The RISC-V attributes frequently cause compatibility issues and provide no
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# information, so just turn them off.
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KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute)
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KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute)
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KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
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KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)
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KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
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KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
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# GCC versions that support the "-mstrict-align" option default to allowing
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# unaligned accesses. While unaligned accesses are explicitly allowed in the
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# RISC-V ISA, they're emulated by machine mode traps on all extant
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# architectures. It's faster to have GCC emit only aligned accesses.
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ifneq ($(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS),y)
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KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
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endif
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ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
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prepare: stack_protector_prepare
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stack_protector_prepare: prepare0
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$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls \
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-mstack-protector-guard-reg=tp \
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-mstack-protector-guard-offset=$(shell \
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awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
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include/generated/asm-offsets.h))
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endif
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# arch specific predefines for sparse
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CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
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# Default target when executing plain make
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boot := arch/riscv/boot
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ifeq ($(CONFIG_XIP_KERNEL),y)
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KBUILD_IMAGE := $(boot)/xipImage
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else
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ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy)
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KBUILD_IMAGE := $(boot)/loader.bin
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else
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ifeq ($(CONFIG_EFI_ZBOOT),)
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KBUILD_IMAGE := $(boot)/Image.gz
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else
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KBUILD_IMAGE := $(boot)/vmlinuz.efi
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endif
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endif
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endif
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boot := arch/riscv/boot
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boot-image-y := Image
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boot-image-$(CONFIG_KERNEL_BZIP2) := Image.bz2
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boot-image-$(CONFIG_KERNEL_GZIP) := Image.gz
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boot-image-$(CONFIG_KERNEL_LZ4) := Image.lz4
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boot-image-$(CONFIG_KERNEL_LZMA) := Image.lzma
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boot-image-$(CONFIG_KERNEL_LZO) := Image.lzo
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boot-image-$(CONFIG_KERNEL_ZSTD) := Image.zst
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boot-image-$(CONFIG_KERNEL_XZ) := Image.xz
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ifdef CONFIG_RISCV_M_MODE
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boot-image-$(CONFIG_ARCH_CANAAN) := loader.bin
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endif
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boot-image-$(CONFIG_EFI_ZBOOT) := vmlinuz.efi
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boot-image-$(CONFIG_XIP_KERNEL) := xipImage
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KBUILD_IMAGE := $(boot)/$(boot-image-y)
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libs-y += arch/riscv/lib/
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libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
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ifeq ($(KBUILD_EXTMOD),)
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ifeq ($(CONFIG_MMU),y)
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prepare: vdso_prepare
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vdso_prepare: prepare0
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$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
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$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
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$(build)=arch/riscv/kernel/compat_vdso include/generated/compat_vdso-offsets.h)
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endif
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endif
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vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
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vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg
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BOOT_TARGETS := Image Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader loader.bin xipImage vmlinuz.efi
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all: $(notdir $(KBUILD_IMAGE))
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loader.bin: loader
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Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader xipImage vmlinuz.efi: Image
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$(BOOT_TARGETS): vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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@$(kecho) ' Kernel: $(boot)/$@ is ready'
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# the install target always installs KBUILD_IMAGE (which may be compressed)
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# but keep the zinstall target for compatibility with older releases
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install zinstall:
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$(call cmd,install)
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PHONY += rv32_randconfig
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rv32_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
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-f $(srctree)/Makefile randconfig
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PHONY += rv64_randconfig
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rv64_randconfig:
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$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
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-f $(srctree)/Makefile randconfig
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PHONY += rv32_defconfig
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rv32_defconfig:
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$(Q)$(MAKE) -f $(srctree)/Makefile defconfig 32-bit.config
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PHONY += rv32_nommu_virt_defconfig
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rv32_nommu_virt_defconfig:
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$(Q)$(MAKE) -f $(srctree)/Makefile nommu_virt_defconfig 32-bit.config
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define archhelp
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echo ' Image - Uncompressed kernel image (arch/riscv/boot/Image)'
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echo ' Image.gz - Compressed kernel image (arch/riscv/boot/Image.gz)'
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echo ' Image.bz2 - Compressed kernel image (arch/riscv/boot/Image.bz2)'
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echo ' Image.lz4 - Compressed kernel image (arch/riscv/boot/Image.lz4)'
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echo ' Image.lzma - Compressed kernel image (arch/riscv/boot/Image.lzma)'
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echo ' Image.lzo - Compressed kernel image (arch/riscv/boot/Image.lzo)'
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echo ' Image.zst - Compressed kernel image (arch/riscv/boot/Image.zst)'
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echo ' Image.xz - Compressed kernel image (arch/riscv/boot/Image.xz)'
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echo ' vmlinuz.efi - Compressed EFI kernel image (arch/riscv/boot/vmlinuz.efi)'
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echo ' Default when CONFIG_EFI_ZBOOT=y'
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echo ' xipImage - Execute-in-place kernel image (arch/riscv/boot/xipImage)'
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echo ' Default when CONFIG_XIP_KERNEL=y'
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echo ' install - Install kernel using (your) ~/bin/$(INSTALLKERNEL) or'
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echo ' (distribution) /sbin/$(INSTALLKERNEL) or install to '
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echo ' $$(INSTALL_PATH)'
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endef
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