forked from Qortal/Brooklyn
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
|
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/simd.h>
|
||
|
|
#include <asm/cpufeature.h>
|
||
|
|
#include <asm/processor.h>
|
||
|
|
#include <asm/fpu/api.h>
|
||
|
|
|
||
|
|
asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
|
||
|
|
const u8 *block, const size_t nblocks,
|
||
|
|
const u32 inc);
|
||
|
|
asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
|
||
|
|
const u8 *block, const size_t nblocks,
|
||
|
|
const u32 inc);
|
||
|
|
|
||
|
|
static bool blake2s_use_ssse3 __ro_after_init;
|
||
|
|
static bool blake2s_use_avx512 __ro_after_init;
|
||
|
|
static bool *const blake2s_nobs[] __initconst = { &blake2s_use_ssse3,
|
||
|
|
&blake2s_use_avx512 };
|
||
|
|
|
||
|
|
static void __init blake2s_fpu_init(void)
|
||
|
|
{
|
||
|
|
blake2s_use_ssse3 = boot_cpu_has(X86_FEATURE_SSSE3);
|
||
|
|
#ifndef COMPAT_CANNOT_USE_AVX512
|
||
|
|
blake2s_use_avx512 =
|
||
|
|
boot_cpu_has(X86_FEATURE_AVX) &&
|
||
|
|
boot_cpu_has(X86_FEATURE_AVX2) &&
|
||
|
|
boot_cpu_has(X86_FEATURE_AVX512F) &&
|
||
|
|
boot_cpu_has(X86_FEATURE_AVX512VL) &&
|
||
|
|
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
|
||
|
|
XFEATURE_MASK_AVX512, NULL);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool blake2s_compress_arch(struct blake2s_state *state,
|
||
|
|
const u8 *block, size_t nblocks,
|
||
|
|
const u32 inc)
|
||
|
|
{
|
||
|
|
simd_context_t simd_context;
|
||
|
|
bool used_arch = false;
|
||
|
|
|
||
|
|
/* SIMD disables preemption, so relax after processing each page. */
|
||
|
|
BUILD_BUG_ON(PAGE_SIZE / BLAKE2S_BLOCK_SIZE < 8);
|
||
|
|
|
||
|
|
simd_get(&simd_context);
|
||
|
|
|
||
|
|
if (!IS_ENABLED(CONFIG_AS_SSSE3) || !blake2s_use_ssse3 ||
|
||
|
|
!simd_use(&simd_context))
|
||
|
|
goto out;
|
||
|
|
used_arch = true;
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
const size_t blocks = min_t(size_t, nblocks,
|
||
|
|
PAGE_SIZE / BLAKE2S_BLOCK_SIZE);
|
||
|
|
|
||
|
|
if (IS_ENABLED(CONFIG_AS_AVX512) && blake2s_use_avx512)
|
||
|
|
blake2s_compress_avx512(state, block, blocks, inc);
|
||
|
|
else
|
||
|
|
blake2s_compress_ssse3(state, block, blocks, inc);
|
||
|
|
|
||
|
|
nblocks -= blocks;
|
||
|
|
if (!nblocks)
|
||
|
|
break;
|
||
|
|
block += blocks * BLAKE2S_BLOCK_SIZE;
|
||
|
|
simd_relax(&simd_context);
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
simd_put(&simd_context);
|
||
|
|
return used_arch;
|
||
|
|
}
|