cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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crc32.h (780B)

      1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
      2/* Copyright (C) 2015-2017 Netronome Systems, Inc. */
      3
      4#ifndef NFP_CRC32_H
      5#define NFP_CRC32_H
      6
      7#include <linux/kernel.h>
      8#include <linux/crc32.h>
      9
     10/**
     11 * crc32_posix_end() - Finalize POSIX CRC32 working state
     12 * @crc:	Current CRC32 working state
     13 * @total_len:	Total length of data that was CRC32'd
     14 *
     15 * Return: Final POSIX CRC32 value
     16 */
     17static inline u32 crc32_posix_end(u32 crc, size_t total_len)
     18{
     19	/* Extend with the length of the string. */
     20	while (total_len != 0) {
     21		u8 c = total_len & 0xff;
     22
     23		crc = crc32_be(crc, &c, 1);
     24		total_len >>= 8;
     25	}
     26
     27	return ~crc;
     28}
     29
     30static inline u32 crc32_posix(const void *buff, size_t len)
     31{
     32	return crc32_posix_end(crc32_be(0, buff, len), len);
     33}
     34
     35#endif /* NFP_CRC32_H */