Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
67882e7649
xxhash is currently implemented as a self-contained module in /lib. This patch enables that module to be used as part of the generic kernel crypto framework. It adds a simple wrapper to the 64bit version. I've also added test vectors (with help from Nick Terrell). The upstream xxhash code is tested by running hashing operation on random 222 byte data with seed values of 0 and a prime number. The upstream test suite can be found at https://github.com/Cyan4973/xxHash/blob/cf46e0c/xxhsum.c#L664 Essentially hashing is run on data of length 0,1,14,222 with the aforementioned seed values 0 and prime 2654435761. The particular random 222 byte string was provided to me by Nick Terrell by reading /dev/random and the checksums were calculated by the upstream xxsum utility with the following bash script: dd if=/dev/random of=TEST_VECTOR bs=1 count=222 for a in 0 1; do for l in 0 1 14 222; do for s in 0 2654435761; do echo algo $a length $l seed $s; head -c $l TEST_VECTOR | ~/projects/kernel/xxHash/xxhsum -H$a -s$s done done done This produces output as follows: algo 0 length 0 seed 0 02cc5d05 stdin algo 0 length 0 seed 2654435761 02cc5d05 stdin algo 0 length 1 seed 0 25201171 stdin algo 0 length 1 seed 2654435761 25201171 stdin algo 0 length 14 seed 0 c1d95975 stdin algo 0 length 14 seed 2654435761 c1d95975 stdin algo 0 length 222 seed 0 b38662a6 stdin algo 0 length 222 seed 2654435761 b38662a6 stdin algo 1 length 0 seed 0 ef46db3751d8e999 stdin algo 1 length 0 seed 2654435761 ac75fda2929b17ef stdin algo 1 length 1 seed 0 27c3f04c2881203a stdin algo 1 length 1 seed 2654435761 4a15ed26415dfe4d stdin algo 1 length 14 seed 0 3d33dc700231dfad stdin algo 1 length 14 seed 2654435761 ea5f7ddef9a64f80 stdin algo 1 length 222 seed 0 5f3d3c08ec2bef34 stdin algo 1 length 222 seed 2654435761 6a9df59664c7ed62 stdin algo 1 is xx64 variant, algo 0 is the 32 bit variant which is currently not hooked up. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
||
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.