1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #if defined(__x86_64) && defined(HAVE_PCLMULQDQ) 27 28 #include <sys/types.h> 29 #include <sys/simd.h> 30 #include <sys/asm_linkage.h> 31 32 /* These functions are used to execute pclmulqdq based assembly methods */ 33 extern void ASMABI gcm_mul_pclmulqdq(uint64_t *, uint64_t *, uint64_t *); 34 35 #include <modes/gcm_impl.h> 36 37 /* 38 * Perform a carry-less multiplication (that is, use XOR instead of the 39 * multiply operator) on *x_in and *y and place the result in *res. 40 * 41 * Byte swap the input (*x_in and *y) and the output (*res). 42 * 43 * Note: x_in, y, and res all point to 16-byte numbers (an array of two 44 * 64-bit integers). 45 */ 46 static void 47 gcm_pclmulqdq_mul(uint64_t *x_in, uint64_t *y, uint64_t *res) 48 { 49 kfpu_begin(); 50 gcm_mul_pclmulqdq(x_in, y, res); 51 kfpu_end(); 52 } 53 54 static boolean_t 55 gcm_pclmulqdq_will_work(void) 56 { 57 return (kfpu_allowed() && zfs_pclmulqdq_available()); 58 } 59 60 const gcm_impl_ops_t gcm_pclmulqdq_impl = { 61 .mul = &gcm_pclmulqdq_mul, 62 .is_supported = &gcm_pclmulqdq_will_work, 63 .name = "pclmulqdq" 64 }; 65 66 #endif /* defined(__x86_64) && defined(HAVE_PCLMULQDQ) */ 67