diff options
| author | Nick Terrell <terrelln@fb.com> | 2020-07-30 21:08:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-07-31 11:49:08 +0200 |
| commit | 4963bb2b89884bbdb7e33e6a09c159551e9627aa (patch) | |
| tree | 503649537075d61fddbfec3f73736d57e5c33a2e /lib/decompress.c | |
| parent | lib: Prepare zstd for preboot environment, improve performance (diff) | |
| download | linux-4963bb2b89884bbdb7e33e6a09c159551e9627aa.tar.xz linux-4963bb2b89884bbdb7e33e6a09c159551e9627aa.zip | |
lib: Add zstd support to decompress
- Add unzstd() and the zstd decompress interface.
- Add zstd support to decompress_method().
The decompress_method() and unzstd() functions are used to decompress
the initramfs and the initrd. The __decompress() function is used in
the preboot environment to decompress a zstd compressed kernel.
The zstd decompression function allows the input and output buffers to
overlap because that is used by x86 kernel decompression.
Signed-off-by: Nick Terrell <terrelln@fb.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200730190841.2071656-3-nickrterrell@gmail.com
Diffstat (limited to 'lib/decompress.c')
| -rw-r--r-- | lib/decompress.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/decompress.c b/lib/decompress.c index 857ab1af1ef3..ab3fc90ffc64 100644 --- a/lib/decompress.c +++ b/lib/decompress.c @@ -13,6 +13,7 @@ #include <linux/decompress/inflate.h> #include <linux/decompress/unlzo.h> #include <linux/decompress/unlz4.h> +#include <linux/decompress/unzstd.h> #include <linux/types.h> #include <linux/string.h> @@ -37,6 +38,9 @@ #ifndef CONFIG_DECOMPRESS_LZ4 # define unlz4 NULL #endif +#ifndef CONFIG_DECOMPRESS_ZSTD +# define unzstd NULL +#endif struct compress_format { unsigned char magic[2]; @@ -52,6 +56,7 @@ static const struct compress_format compressed_formats[] __initconst = { { {0xfd, 0x37}, "xz", unxz }, { {0x89, 0x4c}, "lzo", unlzo }, { {0x02, 0x21}, "lz4", unlz4 }, + { {0x28, 0xb5}, "zstd", unzstd }, { {0, 0}, NULL, NULL } }; |