diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-09-27 04:33:17 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-10-02 03:41:49 +0200 |
| commit | ab089022b5591cd04d3f3495714eac51dc4b4f56 (patch) | |
| tree | bd0d8e774e5e1491402789c201e26d176ecde75d /src/crypto | |
| parent | c7982a3996201f48c7f07ffa12698f647ede2e14 (diff) | |
blake2s: feed fpu functions PAGE_SIZE at a time
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/crypto')
| -rw-r--r-- | src/crypto/zinc/blake2s/blake2s-x86_64-glue.h | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/src/crypto/zinc/blake2s/blake2s-x86_64-glue.h b/src/crypto/zinc/blake2s/blake2s-x86_64-glue.h index b1e86d1..83d56e9 100644 --- a/src/crypto/zinc/blake2s/blake2s-x86_64-glue.h +++ b/src/crypto/zinc/blake2s/blake2s-x86_64-glue.h @@ -3,10 +3,10 @@ * Copyright (C) 2015-2018 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> -#include <asm/simd.h> asmlinkage void blake2s_compress_avx(struct blake2s_state *state, const u8 *block, const size_t nblocks, @@ -37,18 +37,32 @@ static void __init blake2s_fpu_init(void) static inline bool blake2s_arch(struct blake2s_state *state, const u8 *block, size_t nblocks, const u32 inc) { - if (IS_ENABLED(CONFIG_AS_AVX512) && blake2s_use_avx512 && - irq_fpu_usable()) { - kernel_fpu_begin(); - blake2s_compress_avx512(state, block, nblocks, inc); - kernel_fpu_end(); - return true; - } - if (IS_ENABLED(CONFIG_AS_AVX) && blake2s_use_avx && irq_fpu_usable()) { - kernel_fpu_begin(); - blake2s_compress_avx(state, block, nblocks, inc); - kernel_fpu_end(); - return true; + simd_context_t simd_context; + + /* 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_AVX) || !blake2s_use_avx || + !simd_use(&simd_context)) + return false; + + 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_avx(state, block, blocks, inc); + + nblocks -= blocks; + if (!nblocks) + break; + block += blocks * BLAKE2S_BLOCK_SIZE; + simd_relax(&simd_context); } - return false; + simd_put(&simd_context); + return true; } |