From 3ebe12439ba7fc62e1d6ecb569b7287771716ca1 Mon Sep 17 00:00:00 2001 From: Lasse Collin Date: Wed, 12 Jan 2011 17:01:23 -0800 Subject: decompressors: add boot-time XZ support This implements the API defined in which is used for kernel, initramfs, and initrd decompression. This patch together with the first patch is enough for XZ-compressed initramfs and initrd; XZ-compressed kernel will need arch-specific changes. The buffering requirements described in decompress_unxz.c are stricter than with gzip, so the relevant changes should be done to the arch-specific code when adding support for XZ-compressed kernel. Similarly, the heap size in arch-specific pre-boot code may need to be increased (30 KiB is enough). The XZ decompressor needs memmove(), memeq() (memcmp() == 0), and memzero() (memset(ptr, 0, size)), which aren't available in all arch-specific pre-boot environments. I'm including simple versions in decompress_unxz.c, but a cleaner solution would naturally be nicer. Signed-off-by: Lasse Collin Cc: "H. Peter Anvin" Cc: Alain Knaff Cc: Albin Tonnerre Cc: Phillip Lougher Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gen_initramfs_list.sh | 2 ++ 1 file changed, 2 insertions(+) (limited to 'scripts') diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh index 5958fffb211..55caecdad99 100644 --- a/scripts/gen_initramfs_list.sh +++ b/scripts/gen_initramfs_list.sh @@ -243,6 +243,8 @@ case "$arg" in echo "$output_file" | grep -q "\.gz$" && compr="gzip -9 -f" echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f" echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f" + echo "$output_file" | grep -q "\.xz$" && \ + compr="xz --check=crc32 --lzma2=dict=1MiB" echo "$output_file" | grep -q "\.lzo$" && compr="lzop -9 -f" echo "$output_file" | grep -q "\.cpio$" && compr="cat" shift -- cgit v1.2.3-70-g09d2