1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #if defined(__x86_64) && defined(HAVE_PCLMULQDQ) 26 27 #include <sys/types.h> 28 #include <sys/simd.h> 29 30 /* These functions are used to execute pclmulqdq based assembly methods */ 31 extern void gcm_mul_pclmulqdq(uint64_t *, uint64_t *, uint64_t *); 32 33 #include <modes/gcm_impl.h> 34 35 /* 36 * Perform a carry-less multiplication (that is, use XOR instead of the 37 * multiply operator) on *x_in and *y and place the result in *res. 38 * 39 * Byte swap the input (*x_in and *y) and the output (*res). 40 * 41 * Note: x_in, y, and res all point to 16-byte numbers (an array of two 42 * 64-bit integers). 43 */ 44 static void 45 gcm_pclmulqdq_mul(uint64_t *x_in, uint64_t *y, uint64_t *res) 46 { 47 kfpu_begin(); 48 gcm_mul_pclmulqdq(x_in, y, res); 49 kfpu_end(); 50 } 51 52 static boolean_t 53 gcm_pclmulqdq_will_work(void) 54 { 55 return (kfpu_allowed() && zfs_pclmulqdq_available()); 56 } 57 58 const gcm_impl_ops_t gcm_pclmulqdq_impl = { 59 .mul = &gcm_pclmulqdq_mul, 60 .is_supported = &gcm_pclmulqdq_will_work, 61 .name = "pclmulqdq" 62 }; 63 64 #endif /* defined(__x86_64) && defined(HAVE_PCLMULQDQ) */ 65