2016-11-21 11:18:00 +00:00
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.\" Copyright (c) 2016 The FreeBSD Foundation
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.\" All rights reserved.
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.\"
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.\" This software was developed by Andrew Turner under
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.\" sponsorship from the FreeBSD Foundation.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 20, 2016
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.Dt ARMV8CRYPTO 4
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.Os
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.Sh NAME
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.Nm armv8crypto
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.Nd "driver for the AES accelerator on ARM CPUs"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device crypto"
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.Cd "device armv8crypto"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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armv8crypto_load="YES"
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.Ed
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.Sh DESCRIPTION
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Starting with the ARMv8 architecture ARM Limited has added optional
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2016-11-23 18:45:15 +00:00
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cryptography instructions to accelerate AES, SHA-1, SHA-2, and
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2016-11-21 11:18:00 +00:00
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finite field arithmetic.
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.Pp
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The processor capability is reported as AES in the Instruction Set
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Attributes 0 line at boot.
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The
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.Nm
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driver does not attach on systems that lack the required CPU capability.
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.Pp
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The
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.Nm
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driver registers itself to accelerate AES operations for
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.Xr crypto 4 .
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.Sh SEE ALSO
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.Xr crypt 3 ,
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.Xr crypto 4 ,
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.Xr intro 4 ,
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.Xr ipsec 4 ,
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.Xr random 4 ,
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.Xr crypto 9
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 11.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Andrew Turner Aq Mt andrew@FreeBSD.org .
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