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qemu: add castagnoli crc32c checksum algorithm

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This adds the Castagnoli CRC32C algorithm, using the 0x11EDC6F41
polynomial.

This is extracted from the linux kernel cryptographic crc32.c module.

The algorithm is based on:

Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman
             "Optimization of Cyclic Redundancy-Check Codes with 24
              and 32 Parity Bits", IEEE Transactions on Communication,
              Volume 41, Number 6, June 1993

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jeff Cody 2013-04-29 14:48:16 -04:00 • committed by Stefan Hajnoczi
parent 8ca27ce2e1
commit 8e1b02b8ef
3 changed files with 151 additions and 0 deletions
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35
include/qemu/crc32c.h Normal file
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/*
* Castagnoli CRC32C Checksum Algorithm
*
* Polynomial: 0x11EDC6F41
*
* Castagnoli93: Guy Castagnoli and Stefan Braeuer and Martin Herrman
* "Optimization of Cyclic Redundancy-Check Codes with 24
* and 32 Parity Bits",IEEE Transactions on Communication,
* Volume 41, Number 6, June 1993
*
* Copyright (c) 2013 Red Hat, Inc.,
*
* Authors:
* Jeff Cody <jcody@redhat.com>
*
* Based on the Linux kernel cryptographic crc32c module,
*
* Copyright (c) 2004 Cisco Systems, Inc.
* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef QEMU_CRC32_H
#define QEMU_CRC32_H
#include "qemu-common.h"
uint32_t crc32c(uint32_t crc, const uint8_t *data, unsigned int length);
#endif