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9530eb64e0
Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#if defined(__x86_64) && defined(HAVE_PCLMULQDQ)
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#include <sys/types.h>
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#include <sys/simd.h>
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#include <sys/asm_linkage.h>
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/* These functions are used to execute pclmulqdq based assembly methods */
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extern void ASMABI gcm_mul_pclmulqdq(uint64_t *, uint64_t *, uint64_t *);
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#include <modes/gcm_impl.h>
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/*
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* Perform a carry-less multiplication (that is, use XOR instead of the
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* multiply operator) on *x_in and *y and place the result in *res.
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*
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* Byte swap the input (*x_in and *y) and the output (*res).
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*
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* Note: x_in, y, and res all point to 16-byte numbers (an array of two
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* 64-bit integers).
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*/
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static void
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gcm_pclmulqdq_mul(uint64_t *x_in, uint64_t *y, uint64_t *res)
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{
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kfpu_begin();
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gcm_mul_pclmulqdq(x_in, y, res);
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kfpu_end();
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}
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static boolean_t
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gcm_pclmulqdq_will_work(void)
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{
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return (kfpu_allowed() && zfs_pclmulqdq_available());
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}
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const gcm_impl_ops_t gcm_pclmulqdq_impl = {
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.mul = &gcm_pclmulqdq_mul,
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.is_supported = &gcm_pclmulqdq_will_work,
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.name = "pclmulqdq"
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};
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#endif /* defined(__x86_64) && defined(HAVE_PCLMULQDQ) */
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