1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /* 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. 4 */ 5 6 #include <crypto/internal/blake2s.h> 7 #include <crypto/internal/simd.h> 8 9 #include <linux/types.h> 10 #include <linux/jump_label.h> 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/sizes.h> 14 15 #include <asm/cpufeature.h> 16 #include <asm/fpu/api.h> 17 #include <asm/processor.h> 18 #include <asm/simd.h> 19 20 asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state, 21 const u8 *block, const size_t nblocks, 22 const u32 inc); 23 asmlinkage void blake2s_compress_avx512(struct blake2s_state *state, 24 const u8 *block, const size_t nblocks, 25 const u32 inc); 26 27 static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3); 28 static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512); 29 30 void blake2s_compress(struct blake2s_state *state, const u8 *block, 31 size_t nblocks, const u32 inc) 32 { 33 /* SIMD disables preemption, so relax after processing each page. */ 34 BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8); 35 36 if (!static_branch_likely(&blake2s_use_ssse3) || !crypto_simd_usable()) { 37 blake2s_compress_generic(state, block, nblocks, inc); 38 return; 39 } 40 41 do { 42 const size_t blocks = min_t(size_t, nblocks, 43 SZ_4K / BLAKE2S_BLOCK_SIZE); 44 45 kernel_fpu_begin(); 46 if (IS_ENABLED(CONFIG_AS_AVX512) && 47 static_branch_likely(&blake2s_use_avx512)) 48 blake2s_compress_avx512(state, block, blocks, inc); 49 else 50 blake2s_compress_ssse3(state, block, blocks, inc); 51 kernel_fpu_end(); 52 53 nblocks -= blocks; 54 block += blocks * BLAKE2S_BLOCK_SIZE; 55 } while (nblocks); 56 } 57 EXPORT_SYMBOL(blake2s_compress); 58 59 static int __init blake2s_mod_init(void) 60 { 61 if (boot_cpu_has(X86_FEATURE_SSSE3)) 62 static_branch_enable(&blake2s_use_ssse3); 63 64 if (IS_ENABLED(CONFIG_AS_AVX512) && 65 boot_cpu_has(X86_FEATURE_AVX) && 66 boot_cpu_has(X86_FEATURE_AVX2) && 67 boot_cpu_has(X86_FEATURE_AVX512F) && 68 boot_cpu_has(X86_FEATURE_AVX512VL) && 69 cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | 70 XFEATURE_MASK_AVX512, NULL)) 71 static_branch_enable(&blake2s_use_avx512); 72 73 return 0; 74 } 75 76 module_init(blake2s_mod_init); 77 78 MODULE_LICENSE("GPL v2"); 79