Messages in this thread Patch in this message | | | From | Jonathan Neuschäfer <> | Subject | [PATCH 3/3] ARM: compressed: Enable ZSTD compression | Date | Wed, 12 Apr 2023 23:21:26 +0200 |
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With the previous two commits, it is possible to enable ZSTD in the decompressor stub for 32-bit ARM.
Unfortunately, ZSTD decompression has been quite slow in my tests (on ARM926EJ-S, ARMv5T):
- LZO: 7.2 MiB, 6 seconds - ZSTD: 5.6 MiB, 60 seconds
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> --- arch/arm/Kconfig | 1 + arch/arm/boot/compressed/Makefile | 3 ++- arch/arm/boot/compressed/decompress.c | 4 ++++ 3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index e24a9820e12fa..065a1746a257a 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -108,6 +108,7 @@ config ARM select HAVE_KERNEL_LZMA select HAVE_KERNEL_LZO select HAVE_KERNEL_XZ + select HAVE_KERNEL_ZSTD select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M select HAVE_KRETPROBES if HAVE_KPROBES select HAVE_MOD_ARCH_SPECIFIC diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index dec565a5b1f21..55bfca154b12a 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -81,6 +81,7 @@ compress-$(CONFIG_KERNEL_LZO) = lzo_with_size compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size +compress-$(CONFIG_KERNEL_ZSTD) = zstd22_with_size
libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o
@@ -98,7 +99,7 @@ OBJS += lib1funcs.o ashldi3.o bswapsdi2.o targets := vmlinux vmlinux.lds piggy_data piggy.o \ head.o $(OBJS)
-KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING +KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -D__DISABLE_EXPORTS
ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \ -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \ diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c index 3d098b84ee391..2c4fd33444829 100644 --- a/arch/arm/boot/compressed/decompress.c +++ b/arch/arm/boot/compressed/decompress.c @@ -59,6 +59,10 @@ extern char * strchrnul(const char *, int); #include "../../../../lib/decompress_unlz4.c" #endif
+#ifdef CONFIG_KERNEL_ZSTD +#include "../../../../lib/decompress_unzstd.c" +#endif + int do_decompress(u8 *input, int len, u8 *output, int outlen, void (*error)(char *x)) { return __decompress(input, len, NULL, NULL, output, outlen, NULL, error); -- 2.39.2
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