Eric Lee / smarc-fsl-linux-kernel

11 Sep, 2015

1 commit

  • 2d3862d26   lib/decompressors: use real out buf size for gunzip with kernel ... Browse Code »

    When loading x86 64bit kernel above 4GiB with patched grub2, got kernel
    gunzip error.

    | early console in decompress_kernel
    | decompress_kernel:
    | input: [0x807f2143b4-0x807ff61aee]
    | output: [0x807cc00000-0x807f3ea29b] 0x027ea29c: output_len
    | boot via startup_64
    | KASLR using RDTSC...
    | new output: [0x46fe000000-0x470138cfff] 0x0338d000: output_run_size
    | decompress: [0x46fe000000-0x47007ea29b]
    Cc: Alexandre Courbot
    Cc: Jon Medhurst
    Cc: Stephen Warren
    Cc: "H. Peter Anvin"
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Yinghai Lu
     

09 Aug, 2014

1 commit

  • d97b07c54   initramfs: support initramfs that is bigger than 2GiB ... Browse Code »

    Now with 64bit bzImage and kexec tools, we support ramdisk that size is
    bigger than 2g, as we could put it above 4G.

    Found compressed initramfs image could not be decompressed properly. It
    turns out that image length is int during decompress detection, and it
    will become < 0 when length is more than 2G. Furthermore, during
    decompressing len as int is used for inbuf count, that has problem too.

    Change len to long, that should be ok as on 32 bit platform long is
    32bits.

    Tested with following compressed initramfs image as root with kexec.
    gzip, bzip2, xz, lzma, lzop, lz4.
    run time for populate_rootfs():
    size name Nehalem-EX Westmere-EX Ivybridge-EX
    9034400256 root_img : 26s 24s 30s
    3561095057 root_img.lz4 : 28s 27s 27s
    3459554629 root_img.lzo : 29s 29s 28s
    3219399480 root_img.gz : 64s 62s 49s
    2251594592 root_img.xz : 262s 260s 183s
    2226366598 root_img.lzma: 386s 376s 277s
    2901482513 root_img.bz2 : 635s 599s

    Signed-off-by: Yinghai Lu
    Cc: "H. Peter Anvin"
    Cc: Ingo Molnar
    Cc: Rashika Kheria
    Cc: Josh Triplett
    Cc: Kyungsik Lee
    Cc: P J P
    Cc: Al Viro
    Cc: Tetsuo Handa
    Cc: "Daniel M. Weeks"
    Cc: Alexandre Courbot
    Cc: Jan Beulich
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Yinghai Lu
     

31 Mar, 2011

1 commit

14 Jan, 2011

1 commit

  • 3ebe12439   decompressors: add boot-time XZ support ... Browse Code »

    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

    Lasse Collin