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#include <sys/asm_linkage.h>
30
31/* These functions are used to execute pclmulqdq based assembly methods */
32extern void ASMABI gcm_mul_pclmulqdq(uint64_t *, uint64_t *, uint64_t *);
33
34#include <modes/gcm_impl.h>
35
36/*
37 * Perform a carry-less multiplication (that is, use XOR instead of the
38 * multiply operator) on *x_in and *y and place the result in *res.
39 *
40 * Byte swap the input (*x_in and *y) and the output (*res).
41 *
42 * Note: x_in, y, and res all point to 16-byte numbers (an array of two
43 * 64-bit integers).
44 */
45static void
46gcm_pclmulqdq_mul(uint64_t *x_in, uint64_t *y, uint64_t *res)
47{
48	kfpu_begin();
49	gcm_mul_pclmulqdq(x_in, y, res);
50	kfpu_end();
51}
52
53static boolean_t
54gcm_pclmulqdq_will_work(void)
55{
56	return (kfpu_allowed() && zfs_pclmulqdq_available());
57}
58
59const gcm_impl_ops_t gcm_pclmulqdq_impl = {
60	.mul = &gcm_pclmulqdq_mul,
61	.is_supported = &gcm_pclmulqdq_will_work,
62	.name = "pclmulqdq"
63};
64
65#endif /* defined(__x86_64) && defined(HAVE_PCLMULQDQ) */
66