Hi tech@, Here is a diff to document xcrypt in the amd64 version of cpu.4. Bits taken from the i386 version.
Comments? OK? Index: share/man/man4/man4.amd64/cpu.4 =================================================================== RCS file: /cvs/src/share/man/man4/man4.amd64/cpu.4,v retrieving revision 1.7 diff -u -p -r1.7 cpu.4 --- share/man/man4/man4.amd64/cpu.4 12 Jan 2018 04:36:44 -0000 1.7 +++ share/man/man4/man4.amd64/cpu.4 5 Jun 2018 06:06:54 -0000 @@ -52,6 +52,15 @@ offering frequency scaling with numerous Found on various AMD processors. It currently only supports a limited set of models in the K8 families. .El +.Sh INSTRUCTION SET EXTENSIONS +The presence of extended instruction sets can be determined by the +sysctl machdep. +.Bl -tag -width "tenletters" +.It xcrypt +Supports the VIA AES encryption instruction set. +If this is supported, +the libcrypto EVP AES functions automatically use this support. +.El .Sh THERMAL MONITORING The .Xr sysctl 2
