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). 59SYM_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 72SYM_FUNC_END(ghash_zvkg) 73