1.\" $OpenBSD: acpihve.4,v 1.2 2018/04/28 15:44:59 jasper Exp $ 2.\" 3.\" Copyright (c) 2017 Jonathan Gray <jsg@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: April 28 2018 $ 18.Dt ACPIHVE 4 19.Os 20.Sh NAME 21.Nm acpihve 22.Nd Hyper-V entropy 23.Sh SYNOPSIS 24.Cd "acpihve* at acpi?" 25.Sh DESCRIPTION 26Hyper-V hosts make entropy available to guests in the OEM0 ACPI table. 27The 28.Nm 29driver feeds this entropy into the kernel's entropy pool. 30.Sh SEE ALSO 31.Xr acpi 4 , 32.Xr enqueue_randomness 9 33.Sh HISTORY 34The 35.Nm 36driver first appeared in 37.Ox 6.1 . 38