1.\" Copyright (c) 2016 The FreeBSD Foundation 2.\" 3.\" This software was developed by Andrew Turner under 4.\" sponsorship from the FreeBSD Foundation. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.Dd July 29, 2020 28.Dt ARMV8CRYPTO 4 29.Os 30.Sh NAME 31.Nm armv8crypto 32.Nd "driver for the AES accelerator on ARM CPUs" 33.Sh SYNOPSIS 34To compile this driver into the kernel, 35place the following lines in your 36kernel configuration file: 37.Bd -ragged -offset indent 38.Cd "device crypto" 39.Cd "device armv8crypto" 40.Ed 41.Pp 42Alternatively, to load the driver as a 43module at boot time, place the following line in 44.Xr loader.conf 5 : 45.Bd -literal -offset indent 46armv8crypto_load="YES" 47.Ed 48.Sh DESCRIPTION 49Starting with the ARMv8 architecture ARM Limited has added optional 50cryptography instructions to accelerate AES, SHA-1, SHA-2, and 51finite field arithmetic. 52.Pp 53The processor capability is reported as AES in the Instruction Set 54Attributes 0 line at boot. 55The 56.Nm 57driver does not attach on systems that lack the required CPU capability. 58.Pp 59The 60.Nm 61driver registers itself to accelerate AES operations for 62.Xr crypto 4 . 63.Sh SEE ALSO 64.Xr crypt 3 , 65.Xr crypto 4 , 66.Xr intro 4 , 67.Xr ipsec 4 , 68.Xr random 4 , 69.Xr crypto 7 , 70.Xr crypto 9 71.Sh HISTORY 72The 73.Nm 74driver first appeared in 75.Fx 11.0 . 76.Sh AUTHORS 77.An -nosplit 78The 79.Nm 80driver was written by 81.An Andrew Turner Aq Mt andrew@FreeBSD.org . 82