xref: /freebsd/share/man/man4/man4.aarch64/armv8crypto.4 (revision cddbc3b40812213ff00041f79174cac0be360a2a)
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28.\" $FreeBSD$
29.\"
30.Dd October 20, 2016
31.Dt ARMV8CRYPTO 4
32.Os
33.Sh NAME
34.Nm armv8crypto
35.Nd "driver for the AES accelerator on ARM CPUs"
36.Sh SYNOPSIS
37To compile this driver into the kernel,
38place the following lines in your
39kernel configuration file:
40.Bd -ragged -offset indent
41.Cd "device crypto"
42.Cd "device armv8crypto"
43.Ed
44.Pp
45Alternatively, to load the driver as a
46module at boot time, place the following line in
47.Xr loader.conf 5 :
48.Bd -literal -offset indent
49armv8crypto_load="YES"
50.Ed
51.Sh DESCRIPTION
52Starting with the ARMv8 architecture ARM Limited has added optional
53cryptography instructions to accelerate AES, SHA-1, SHA-2, and
54finite field arithmetic.
55.Pp
56The processor capability is reported as AES in the Instruction Set
57Attributes 0 line at boot.
58The
59.Nm
60driver does not attach on systems that lack the required CPU capability.
61.Pp
62The
63.Nm
64driver registers itself to accelerate AES operations for
65.Xr crypto 4 .
66.Sh SEE ALSO
67.Xr crypt 3 ,
68.Xr crypto 4 ,
69.Xr intro 4 ,
70.Xr ipsec 4 ,
71.Xr random 4 ,
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