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authorLinus Torvalds <torvalds@linux-foundation.org>2020-12-02 23:09:36 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-02 23:09:36 +0300
commit8a02ec8f35779335b81577903832c2b3c495e979 (patch)
treefcfea67b99cc17756549286858380eec410af68c /Documentation
parent509a15421674b9e1a3e1916939d0d0efd3e578da (diff)
parent05227490c5f0f1bbd3693a7a70b3fb5b09d2a996 (diff)
downloadlinux-8a02ec8f35779335b81577903832c2b3c495e979.tar.xz
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')
-rw-r--r--Documentation/admin-guide/bootconfig.rst4
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