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