1.\" $OpenBSD: vrng.4,v 1.3 2013/07/16 16:05:50 schwarze Exp $ 2.\" 3.\" Copyright (c) 2008 Mark Kettenis <kettenis@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: July 16 2013 $ 18.Dt VRNG 4 sparc64 19.Os 20.Sh NAME 21.Nm vrng 22.Nd virtual random number generator 23.Sh SYNOPSIS 24.Cd "vrng0 at vbus?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides support for the random number generation service 29provided by the UltraSPARC Hypervisor as found on sun4v systems. 30.Pp 31Driven by periodic checks for available data from the generator, 32.Nm 33supplies entropy to the 34.Xr random 4 35driver for common usage. 36.Sh SEE ALSO 37.Xr intro 4 , 38.Xr random 4 , 39.Xr vbus 4 40.Sh HISTORY 41The 42.Nm 43driver first appeared in 44.Ox 4.5 . 45.Sh AUTHORS 46The 47.Nm 48driver was written by 49.An Mark Kettenis Aq Mt kettenis@openbsd.org . 50.Sh BUGS 51The 52.Nm 53driver should probably do periodic 54.Dq health checks 55when running in a Trusted Domain, but currently does not. 56