1 /* SPDX-License-Identifier: Apache-2.0 OR BSD-2-Clause */
2 //
3 // This file is dual-licensed, meaning that you can use it under your
4 // choice of either of the following two licenses:
5 //
6 // Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
7 //
8 // Licensed under the Apache License 2.0 (the "License"). You can obtain
9 // a copy in the file LICENSE in the source distribution or at
10 // https://www.openssl.org/source/license.html
11 //
12 // or
13 //
14 // Copyright (c) 2023, Christoph Müllner <christoph.muellner@vrull.eu>
15 // Copyright (c) 2023, Jerry Shih <jerry.shih@sifive.com>
16 // Copyright 2024 Google LLC
17 // All rights reserved.
18 //
19 // Redistribution and use in source and binary forms, with or without
20 // modification, are permitted provided that the following conditions
21 // are met:
22 // 1. Redistributions of source code must retain the above copyright
23 // notice, this list of conditions and the following disclaimer.
24 // 2. Redistributions in binary form must reproduce the above copyright
25 // notice, this list of conditions and the following disclaimer in the
26 // documentation and/or other materials provided with the distribution.
27 //
28 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39
40 // The generated code of this file depends on the following RISC-V extensions:
41 // - RV64I
42 // - RISC-V Vector ('V') with VLEN >= 128
43 // - RISC-V Vector GCM/GMAC extension ('Zvkg')
44
45 #include <linux/linkage.h>
46
47 .text
48 .option arch, +zvkg
49
50 #define ACCUMULATOR a0
51 #define KEY a1
52 #define DATA a2
53 #define LEN a3
54
55 // void ghash_zvkg(be128 *accumulator, const be128 *key, const u8 *data,
56 // size_t len);
57 //
58 // |len| must be nonzero and a multiple of 16 (GHASH_BLOCK_SIZE).
59 SYM_FUNC_START(ghash_zvkg)
60 vsetivli zero, 4, e32, m1, ta, ma
61 vle32.v v1, (ACCUMULATOR)
62 vle32.v v2, (KEY)
63 .Lnext_block:
64 vle32.v v3, (DATA)
65 vghsh.vv v1, v2, v3
66 addi DATA, DATA, 16
67 addi LEN, LEN, -16
68 bnez LEN, .Lnext_block
69
70 vse32.v v1, (ACCUMULATOR)
71 ret
72 SYM_FUNC_END(ghash_zvkg)
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