]> git.baikalelectronics.ru Git - kernel.git/commit
x86: support XZ-compressed kernel
authorLasse Collin <lasse.collin@tukaani.org>
Thu, 13 Jan 2011 01:01:24 +0000 (17:01 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 13 Jan 2011 16:03:25 +0000 (08:03 -0800)
commitcf7b813f0653591b841d8438110662c833bc3d20
tree9be64b5d44cbef232daf11a89107772cb21647de
parente3fa3988b2bfc505d2c4a8f86b33a49f239fa7f9
x86: support XZ-compressed kernel

This integrates the XZ decompression code to the x86 pre-boot code.

mkpiggy.c is updated to reserve about 32 KiB more buffer safety margin for
kernel decompression.  It is done unconditionally for all decompressors to
keep the code simpler.

The XZ decompressor needs around 30 KiB of heap, so the heap size is
increased to 32 KiB on both x86-32 and x86-64.

Documentation/x86/boot.txt is updated to list the XZ magic number.

With the x86 BCJ filter in XZ, XZ-compressed x86 kernel tends to be a few
percent smaller than the equivalent LZMA-compressed kernel.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/x86/boot.txt
arch/x86/Kconfig
arch/x86/boot/compressed/Makefile
arch/x86/boot/compressed/misc.c
arch/x86/boot/compressed/mkpiggy.c
arch/x86/include/asm/boot.h