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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-02 12:09:36 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-02 12:09:36 -0800 |
| commit | 8a02ec8f35779335b81577903832c2b3c495e979 (patch) | |
| tree | fcfea67b99cc17756549286858380eec410af68c /Documentation/admin-guide | |
| parent | 509a15421674b9e1a3e1916939d0d0efd3e578da (diff) | |
| parent | 05227490c5f0f1bbd3693a7a70b3fb5b09d2a996 (diff) | |
Merge tag 'trace-v5.10-rc6-bootconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull bootconfig fixes from Steven Rostedt:
"Have bootconfig size and checksum be little endian
In case the bootconfig is created on one kind of endian machine, and
then read on the other kind of endian kernel, the size and checksum
will be incorrect. Instead, have both the size and checksum always be
little endian and have the tool and the kernel convert it from little
endian to or from the host endian"
* tag 'trace-v5.10-rc6-bootconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
docs: bootconfig: Add the endianness of fields
tools/bootconfig: Store size and checksum in footer as le32
bootconfig: Load size and checksum in the footer as le32
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/bootconfig.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/admin-guide/bootconfig.rst b/Documentation/admin-guide/bootconfig.rst index 363599683784..9b90efcc3a35 100644 --- a/Documentation/admin-guide/bootconfig.rst +++ b/Documentation/admin-guide/bootconfig.rst @@ -140,7 +140,9 @@ Since the boot configuration file is loaded with initrd, it will be added to the end of the initrd (initramfs) image file with padding, size, checksum and 12-byte magic word as below. -[initrd][bootconfig][padding][size(u32)][checksum(u32)][#BOOTCONFIG\n] +[initrd][bootconfig][padding][size(le32)][checksum(le32)][#BOOTCONFIG\n] + +The size and checksum fields are unsigned 32bit little endian value. When the boot configuration is added to the initrd image, the total file size is aligned to 4 bytes. To fill the gap, null characters |