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
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27.\" $FreeBSD$
28.\"
29.Dd July 29, 2020
30.Dt ARMV8CRYPTO 4
31.Os
32.Sh NAME
33.Nm armv8crypto
34.Nd "driver for the AES accelerator on ARM CPUs"
35.Sh SYNOPSIS
36To compile this driver into the kernel,
37place the following lines in your
38kernel configuration file:
39.Bd -ragged -offset indent
40.Cd "device crypto"
41.Cd "device armv8crypto"
42.Ed
43.Pp
44Alternatively, to load the driver as a
45module at boot time, place the following line in
46.Xr loader.conf 5 :
47.Bd -literal -offset indent
48armv8crypto_load="YES"
49.Ed
50.Sh DESCRIPTION
51Starting with the ARMv8 architecture ARM Limited has added optional
52cryptography instructions to accelerate AES, SHA-1, SHA-2, and
53finite field arithmetic.
54.Pp
55The processor capability is reported as AES in the Instruction Set
56Attributes 0 line at boot.
57The
58.Nm
59driver does not attach on systems that lack the required CPU capability.
60.Pp
61The
62.Nm
63driver registers itself to accelerate AES operations for
64.Xr crypto 4 .
65.Sh SEE ALSO
66.Xr crypt 3 ,
67.Xr crypto 4 ,
68.Xr intro 4 ,
69.Xr ipsec 4 ,
70.Xr random 4 ,
71.Xr crypto 7 ,
72.Xr crypto 9
73.Sh HISTORY
74The
75.Nm
76driver first appeared in
77.Fx 11.0 .
78.Sh AUTHORS
79.An -nosplit
80The
81.Nm
82driver was written by
83.An Andrew Turner Aq Mt andrew@FreeBSD.org .
84