1 /* $NetBSD: chacha_sse2_impl.c,v 1.1 2020/07/25 22:49:20 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(1, "$NetBSD: chacha_sse2_impl.c,v 1.1 2020/07/25 22:49:20 riastradh Exp $"); 31 32 #include "chacha_sse2.h" 33 34 #ifdef _KERNEL 35 #include <x86/cpu.h> 36 #include <x86/fpu.h> 37 #else 38 #include <sys/sysctl.h> 39 #include <cpuid.h> 40 #include <stddef.h> 41 #define fpu_kern_enter() ((void)0) 42 #define fpu_kern_leave() ((void)0) 43 #endif 44 45 static void 46 chacha_core_sse2_impl(uint8_t out[restrict static 64], 47 const uint8_t in[static 16], 48 const uint8_t k[static 32], 49 const uint8_t c[static 16], 50 unsigned nr) 51 { 52 53 fpu_kern_enter(); 54 chacha_core_sse2(out, in, k, c, nr); 55 fpu_kern_leave(); 56 } 57 58 static void 59 hchacha_sse2_impl(uint8_t out[restrict static 32], 60 const uint8_t in[static 16], 61 const uint8_t k[static 32], 62 const uint8_t c[static 16], 63 unsigned nr) 64 { 65 66 fpu_kern_enter(); 67 hchacha_sse2(out, in, k, c, nr); 68 fpu_kern_leave(); 69 } 70 71 static void 72 chacha_stream_sse2_impl(uint8_t *restrict s, size_t nbytes, uint32_t blkno, 73 const uint8_t nonce[static 12], 74 const uint8_t key[static 32], 75 unsigned nr) 76 { 77 78 fpu_kern_enter(); 79 chacha_stream_sse2(s, nbytes, blkno, nonce, key, nr); 80 fpu_kern_leave(); 81 } 82 83 static void 84 chacha_stream_xor_sse2_impl(uint8_t *c, const uint8_t *p, size_t nbytes, 85 uint32_t blkno, 86 const uint8_t nonce[static 12], 87 const uint8_t key[static 32], 88 unsigned nr) 89 { 90 91 fpu_kern_enter(); 92 chacha_stream_xor_sse2(c, p, nbytes, blkno, nonce, key, nr); 93 fpu_kern_leave(); 94 } 95 96 static void 97 xchacha_stream_sse2_impl(uint8_t *restrict s, size_t nbytes, uint32_t blkno, 98 const uint8_t nonce[static 24], 99 const uint8_t key[static 32], 100 unsigned nr) 101 { 102 103 fpu_kern_enter(); 104 xchacha_stream_sse2(s, nbytes, blkno, nonce, key, nr); 105 fpu_kern_leave(); 106 } 107 108 static void 109 xchacha_stream_xor_sse2_impl(uint8_t *c, const uint8_t *p, size_t nbytes, 110 uint32_t blkno, 111 const uint8_t nonce[static 24], 112 const uint8_t key[static 32], 113 unsigned nr) 114 { 115 116 fpu_kern_enter(); 117 xchacha_stream_xor_sse2(c, p, nbytes, blkno, nonce, key, nr); 118 fpu_kern_leave(); 119 } 120 121 static int 122 chacha_probe_sse2(void) 123 { 124 125 /* Verify that the CPU supports SSE and SSE2. */ 126 #ifdef _KERNEL 127 if (!i386_has_sse) 128 return -1; 129 if (!i386_has_sse2) 130 return -1; 131 #else 132 unsigned eax, ebx, ecx, edx; 133 if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) 134 return -1; 135 if ((edx & bit_SSE) == 0) 136 return -1; 137 if ((edx & bit_SSE2) == 0) 138 return -1; 139 #endif 140 141 return 0; 142 } 143 144 const struct chacha_impl chacha_sse2_impl = { 145 .ci_name = "x86 SSE2 ChaCha", 146 .ci_probe = chacha_probe_sse2, 147 .ci_chacha_core = chacha_core_sse2_impl, 148 .ci_hchacha = hchacha_sse2_impl, 149 .ci_chacha_stream = chacha_stream_sse2_impl, 150 .ci_chacha_stream_xor = chacha_stream_xor_sse2_impl, 151 .ci_xchacha_stream = xchacha_stream_sse2_impl, 152 .ci_xchacha_stream_xor = xchacha_stream_xor_sse2_impl, 153 }; 154