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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pq.h (6143B)


      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/* -*- linux-c -*- ------------------------------------------------------- *
      3 *
      4 *   Copyright 2003 H. Peter Anvin - All Rights Reserved
      5 *
      6 * ----------------------------------------------------------------------- */
      7
      8#ifndef LINUX_RAID_RAID6_H
      9#define LINUX_RAID_RAID6_H
     10
     11#ifdef __KERNEL__
     12
     13/* Set to 1 to use kernel-wide empty_zero_page */
     14#define RAID6_USE_EMPTY_ZERO_PAGE 0
     15#include <linux/blkdev.h>
     16
     17/* We need a pre-zeroed page... if we don't want to use the kernel-provided
     18   one define it here */
     19#if RAID6_USE_EMPTY_ZERO_PAGE
     20# define raid6_empty_zero_page empty_zero_page
     21#else
     22extern const char raid6_empty_zero_page[PAGE_SIZE];
     23#endif
     24
     25#else /* ! __KERNEL__ */
     26/* Used for testing in user space */
     27
     28#include <errno.h>
     29#include <inttypes.h>
     30#include <stddef.h>
     31#include <string.h>
     32#include <sys/mman.h>
     33#include <sys/time.h>
     34#include <sys/types.h>
     35
     36/* Not standard, but glibc defines it */
     37#define BITS_PER_LONG __WORDSIZE
     38
     39typedef uint8_t  u8;
     40typedef uint16_t u16;
     41typedef uint32_t u32;
     42typedef uint64_t u64;
     43
     44#ifndef PAGE_SIZE
     45# define PAGE_SIZE 4096
     46#endif
     47#ifndef PAGE_SHIFT
     48# define PAGE_SHIFT 12
     49#endif
     50extern const char raid6_empty_zero_page[PAGE_SIZE];
     51
     52#define __init
     53#define __exit
     54#ifndef __attribute_const__
     55# define __attribute_const__ __attribute__((const))
     56#endif
     57#define noinline __attribute__((noinline))
     58
     59#define preempt_enable()
     60#define preempt_disable()
     61#define cpu_has_feature(x) 1
     62#define enable_kernel_altivec()
     63#define disable_kernel_altivec()
     64
     65#undef	EXPORT_SYMBOL
     66#define EXPORT_SYMBOL(sym)
     67#undef	EXPORT_SYMBOL_GPL
     68#define EXPORT_SYMBOL_GPL(sym)
     69#define MODULE_LICENSE(licence)
     70#define MODULE_DESCRIPTION(desc)
     71#define subsys_initcall(x)
     72#define module_exit(x)
     73
     74#define IS_ENABLED(x) (x)
     75#define CONFIG_RAID6_PQ_BENCHMARK 1
     76#endif /* __KERNEL__ */
     77
     78/* Routine choices */
     79struct raid6_calls {
     80	void (*gen_syndrome)(int, size_t, void **);
     81	void (*xor_syndrome)(int, int, int, size_t, void **);
     82	int  (*valid)(void);	/* Returns 1 if this routine set is usable */
     83	const char *name;	/* Name of this routine set */
     84	int priority;		/* Relative priority ranking if non-zero */
     85};
     86
     87/* Selected algorithm */
     88extern struct raid6_calls raid6_call;
     89
     90/* Various routine sets */
     91extern const struct raid6_calls raid6_intx1;
     92extern const struct raid6_calls raid6_intx2;
     93extern const struct raid6_calls raid6_intx4;
     94extern const struct raid6_calls raid6_intx8;
     95extern const struct raid6_calls raid6_intx16;
     96extern const struct raid6_calls raid6_intx32;
     97extern const struct raid6_calls raid6_mmxx1;
     98extern const struct raid6_calls raid6_mmxx2;
     99extern const struct raid6_calls raid6_sse1x1;
    100extern const struct raid6_calls raid6_sse1x2;
    101extern const struct raid6_calls raid6_sse2x1;
    102extern const struct raid6_calls raid6_sse2x2;
    103extern const struct raid6_calls raid6_sse2x4;
    104extern const struct raid6_calls raid6_altivec1;
    105extern const struct raid6_calls raid6_altivec2;
    106extern const struct raid6_calls raid6_altivec4;
    107extern const struct raid6_calls raid6_altivec8;
    108extern const struct raid6_calls raid6_avx2x1;
    109extern const struct raid6_calls raid6_avx2x2;
    110extern const struct raid6_calls raid6_avx2x4;
    111extern const struct raid6_calls raid6_avx512x1;
    112extern const struct raid6_calls raid6_avx512x2;
    113extern const struct raid6_calls raid6_avx512x4;
    114extern const struct raid6_calls raid6_s390vx8;
    115extern const struct raid6_calls raid6_vpermxor1;
    116extern const struct raid6_calls raid6_vpermxor2;
    117extern const struct raid6_calls raid6_vpermxor4;
    118extern const struct raid6_calls raid6_vpermxor8;
    119
    120struct raid6_recov_calls {
    121	void (*data2)(int, size_t, int, int, void **);
    122	void (*datap)(int, size_t, int, void **);
    123	int  (*valid)(void);
    124	const char *name;
    125	int priority;
    126};
    127
    128extern const struct raid6_recov_calls raid6_recov_intx1;
    129extern const struct raid6_recov_calls raid6_recov_ssse3;
    130extern const struct raid6_recov_calls raid6_recov_avx2;
    131extern const struct raid6_recov_calls raid6_recov_avx512;
    132extern const struct raid6_recov_calls raid6_recov_s390xc;
    133extern const struct raid6_recov_calls raid6_recov_neon;
    134
    135extern const struct raid6_calls raid6_neonx1;
    136extern const struct raid6_calls raid6_neonx2;
    137extern const struct raid6_calls raid6_neonx4;
    138extern const struct raid6_calls raid6_neonx8;
    139
    140/* Algorithm list */
    141extern const struct raid6_calls * const raid6_algos[];
    142extern const struct raid6_recov_calls *const raid6_recov_algos[];
    143int raid6_select_algo(void);
    144
    145/* Return values from chk_syndrome */
    146#define RAID6_OK	0
    147#define RAID6_P_BAD	1
    148#define RAID6_Q_BAD	2
    149#define RAID6_PQ_BAD	3
    150
    151/* Galois field tables */
    152extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
    153extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
    154extern const u8 raid6_gfexp[256]      __attribute__((aligned(256)));
    155extern const u8 raid6_gflog[256]      __attribute__((aligned(256)));
    156extern const u8 raid6_gfinv[256]      __attribute__((aligned(256)));
    157extern const u8 raid6_gfexi[256]      __attribute__((aligned(256)));
    158
    159/* Recovery routines */
    160extern void (*raid6_2data_recov)(int disks, size_t bytes, int faila, int failb,
    161		       void **ptrs);
    162extern void (*raid6_datap_recov)(int disks, size_t bytes, int faila,
    163			void **ptrs);
    164void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
    165		      void **ptrs);
    166
    167/* Some definitions to allow code to be compiled for testing in userspace */
    168#ifndef __KERNEL__
    169
    170# define jiffies	raid6_jiffies()
    171# define printk 	printf
    172# define pr_err(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
    173# define pr_info(format, ...) fprintf(stdout, format, ## __VA_ARGS__)
    174# define GFP_KERNEL	0
    175# define __get_free_pages(x, y)	((unsigned long)mmap(NULL, PAGE_SIZE << (y), \
    176						     PROT_READ|PROT_WRITE,   \
    177						     MAP_PRIVATE|MAP_ANONYMOUS,\
    178						     0, 0))
    179# define free_pages(x, y)	munmap((void *)(x), PAGE_SIZE << (y))
    180
    181static inline void cpu_relax(void)
    182{
    183	/* Nothing */
    184}
    185
    186#undef  HZ
    187#define HZ 1000
    188static inline uint32_t raid6_jiffies(void)
    189{
    190	struct timeval tv;
    191	gettimeofday(&tv, NULL);
    192	return tv.tv_sec*1000 + tv.tv_usec/1000;
    193}
    194
    195#endif /* ! __KERNEL__ */
    196
    197#endif /* LINUX_RAID_RAID6_H */