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riscv: make image compression configurable

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Previously the build process would always set KBUILD_IMAGE to the
uncompressed Image file (unless XIP_KERNEL or EFI_ZBOOT was enabled) and
unconditionally compress it into Image.gz. However there are already
build targets for Image.bz2, Image.lz4, Image.lzma, Image.lzo and
Image.zstd, so let's make use of those, make the compression method
configurable and set KBUILD_IMAGE accordingly so that targets like
'make install' and 'make bindeb-pkg' will use the chosen image.

Tested-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240504193446.196886-2-emil.renner.berthing@canonical.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Emil Renner Berthing 2024-05-04 21:34:38 +02:00 committed by Palmer Dabbelt
parent 0bfbc914d9
commit e79dfcbfb9
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
3 changed files with 33 additions and 10 deletions
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7
arch/riscv/Kconfig
View File

@ -140,6 +140,13 @@ config RISCV
select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO if MMU && 64BIT
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_KERNEL_BZIP2 if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_GZIP if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_LZ4 if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_LZMA if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_LZO if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_UNCOMPRESSED if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_ZSTD if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KPROBES if !XIP_KERNEL
select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL
select HAVE_KRETPROBES if !XIP_KERNEL

27
arch/riscv/Makefile
View File

@ -151,6 +151,21 @@ endif
endif
endif
boot := arch/riscv/boot
boot-image-y := Image
boot-image-$(CONFIG_KERNEL_BZIP2) := Image.bz2
boot-image-$(CONFIG_KERNEL_GZIP) := Image.gz
boot-image-$(CONFIG_KERNEL_LZ4) := Image.lz4
boot-image-$(CONFIG_KERNEL_LZMA) := Image.lzma
boot-image-$(CONFIG_KERNEL_LZO) := Image.lzo
boot-image-$(CONFIG_KERNEL_ZSTD) := Image.zst
ifdef CONFIG_RISCV_M_MODE
boot-image-$(CONFIG_ARCH_CANAAN) := loader.bin
endif
boot-image-$(CONFIG_EFI_ZBOOT) := vmlinuz.efi
boot-image-$(CONFIG_XIP_KERNEL) := xipImage
KBUILD_IMAGE := $(boot)/$(boot-image-y)
libs-y += arch/riscv/lib/
libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
@ -168,21 +183,19 @@ endif
vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg
BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi
BOOT_TARGETS := Image Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst loader loader.bin xipImage vmlinuz.efi
all: $(notdir $(KBUILD_IMAGE))
loader.bin: loader
Image.gz loader vmlinuz.efi: Image
Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst loader xipImage vmlinuz.efi: Image
$(BOOT_TARGETS): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
@$(kecho) ' Kernel: $(boot)/$@ is ready'
Image.%: Image
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
install: KBUILD_IMAGE := $(boot)/Image
zinstall: KBUILD_IMAGE := $(boot)/Image.gz
# the install target always installs KBUILD_IMAGE (which may be compressed)
# but keep the zinstall target for compatibility with older releases
install zinstall:
$(call cmd,install)

9
arch/riscv/boot/install.sh
View File

@ -17,15 +17,18 @@
# $3 - kernel map file
# $4 - default install path (blank if root directory)
if [ "$(basename $2)" = "Image.gz" ]; then
case "${2##*/}" in
# Compressed install
Image.*|vmlinuz.efi)
echo "Installing compressed kernel"
base=vmlinuz
else
;;
# Normal install
*)
echo "Installing normal kernel"
base=vmlinux
fi
;;
esac
if [ -f $4/$base-$1 ]; then
mv $4/$base-$1 $4/$base-$1.old