The patch titled
Subject: riscv: boot: add Image.xz support
has been added to the -mm mm-nonmm-unstable branch. Its filename is
riscv-boot-add-imagexz-support.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/riscv-boot-add-imagexz-support.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Lasse Collin <lasse.collin@xxxxxxxxxxx>
Subject: riscv: boot: add Image.xz support
Date: Sun, 21 Jul 2024 16:36:31 +0300
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@xxxxxxxxxxx
Signed-off-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@xxxxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Jules Maselbas <jmaselbas@xxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Joel Stanley <joel@xxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Jubin Zhong <zhongjubin@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Rui Li <me@xxxxxxxxx>
Cc: Sam James <sam@xxxxxxxxxx>
Cc: Simon Glass <sjg@xxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/riscv/Kconfig | 1 +
arch/riscv/Makefile | 6 ++++--
arch/riscv/boot/Makefile | 3 +++
3 files changed, 8 insertions(+), 2 deletions(-)
--- a/arch/riscv/boot/Makefile~riscv-boot-add-imagexz-support
+++ a/arch/riscv/boot/Makefile
@@ -65,6 +65,9 @@ $(obj)/Image.lzo: $(obj)/Image FORCE
$(obj)/Image.zst: $(obj)/Image FORCE
$(call if_changed,zstd)
+$(obj)/Image.xz: $(obj)/Image FORCE
+ $(call if_changed,xzkern)
+
$(obj)/loader.bin: $(obj)/loader FORCE
$(call if_changed,objcopy)
--- a/arch/riscv/Kconfig~riscv-boot-add-imagexz-support
+++ a/arch/riscv/Kconfig
@@ -153,6 +153,7 @@ config RISCV
select HAVE_KERNEL_LZO if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_UNCOMPRESSED if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KERNEL_ZSTD if !XIP_KERNEL && !EFI_ZBOOT
+ select HAVE_KERNEL_XZ if !XIP_KERNEL && !EFI_ZBOOT
select HAVE_KPROBES if !XIP_KERNEL
select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL
select HAVE_KRETPROBES if !XIP_KERNEL
--- a/arch/riscv/Makefile~riscv-boot-add-imagexz-support
+++ a/arch/riscv/Makefile
@@ -159,6 +159,7 @@ boot-image-$(CONFIG_KERNEL_LZ4) := Imag
boot-image-$(CONFIG_KERNEL_LZMA) := Image.lzma
boot-image-$(CONFIG_KERNEL_LZO) := Image.lzo
boot-image-$(CONFIG_KERNEL_ZSTD) := Image.zst
+boot-image-$(CONFIG_KERNEL_XZ) := Image.xz
ifdef CONFIG_RISCV_M_MODE
boot-image-$(CONFIG_ARCH_CANAAN) := loader.bin
endif
@@ -183,12 +184,12 @@ endif
vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg
-BOOT_TARGETS := Image Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst loader loader.bin xipImage vmlinuz.efi
+BOOT_TARGETS := Image Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader loader.bin xipImage vmlinuz.efi
all: $(notdir $(KBUILD_IMAGE))
loader.bin: loader
-Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst loader xipImage vmlinuz.efi: Image
+Image.gz Image.bz2 Image.lz4 Image.lzma Image.lzo Image.zst Image.xz loader xipImage vmlinuz.efi: Image
$(BOOT_TARGETS): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
@@ -225,6 +226,7 @@ define archhelp
echo ' Image.lzma - Compressed kernel image (arch/riscv/boot/Image.lzma)'
echo ' Image.lzo - Compressed kernel image (arch/riscv/boot/Image.lzo)'
echo ' Image.zst - Compressed kernel image (arch/riscv/boot/Image.zst)'
+ echo ' Image.xz - Compressed kernel image (arch/riscv/boot/Image.xz)'
echo ' vmlinuz.efi - Compressed EFI kernel image (arch/riscv/boot/vmlinuz.efi)'
echo ' Default when CONFIG_EFI_ZBOOT=y'
echo ' xipImage - Execute-in-place kernel image (arch/riscv/boot/xipImage)'
_
Patches currently in -mm which might be from lasse.collin@xxxxxxxxxxx are
maintainers-add-xz-embedded-maintainer.patch
licenses-add-0bsd-license-text.patch
xz-switch-from-public-domain-to-bsd-zero-clause-license-0bsd.patch
xz-fix-comments-and-coding-style.patch
xz-fix-kernel-doc-formatting-errors-in-xzh.patch
xz-improve-the-microlzma-kernel-doc-in-xzh.patch
xz-documentation-staging-xzrst-revise-thoroughly.patch
docs-add-xz_extern-to-c_id_attributes.patch
xz-cleanup-crc32-edits-from-2018.patch
xz-optimize-for-loop-conditions-in-the-bcj-decoders.patch
xz-add-arm64-bcj-filter.patch
xz-add-risc-v-bcj-filter.patch
xz-use-128-mib-dictionary-and-force-single-threaded-mode.patch
xz-adjust-arch-specific-options-for-better-kernel-compression.patch
arm64-boot-add-imagexz-support.patch
riscv-boot-add-imagexz-support.patch
