75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
|
/*
|
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
|
*/
|
|
|
|
#include <crypto/internal/blake2s.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/jump_label.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sizes.h>
|
|
|
|
#include <asm/cpufeature.h>
|
|
#include <asm/fpu/api.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/simd.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 __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
|
|
static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
|
|
|
|
void blake2s_compress(struct blake2s_state *state, const u8 *block,
|
|
size_t nblocks, const u32 inc)
|
|
{
|
|
/* SIMD disables preemption, so relax after processing each page. */
|
|
BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
|
|
|
|
if (!static_branch_likely(&blake2s_use_ssse3) || !may_use_simd()) {
|
|
blake2s_compress_generic(state, block, nblocks, inc);
|
|
return;
|
|
}
|
|
|
|
do {
|
|
const size_t blocks = min_t(size_t, nblocks,
|
|
SZ_4K / BLAKE2S_BLOCK_SIZE);
|
|
|
|
kernel_fpu_begin();
|
|
if (IS_ENABLED(CONFIG_AS_AVX512) &&
|
|
static_branch_likely(&blake2s_use_avx512))
|
|
blake2s_compress_avx512(state, block, blocks, inc);
|
|
else
|
|
blake2s_compress_ssse3(state, block, blocks, inc);
|
|
kernel_fpu_end();
|
|
|
|
nblocks -= blocks;
|
|
block += blocks * BLAKE2S_BLOCK_SIZE;
|
|
} while (nblocks);
|
|
}
|
|
EXPORT_SYMBOL(blake2s_compress);
|
|
|
|
static int __init blake2s_mod_init(void)
|
|
{
|
|
if (boot_cpu_has(X86_FEATURE_SSSE3))
|
|
static_branch_enable(&blake2s_use_ssse3);
|
|
|
|
if (IS_ENABLED(CONFIG_AS_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))
|
|
static_branch_enable(&blake2s_use_avx512);
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(blake2s_mod_init);
|