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+.\"	$OpenBSD: pvclock.4,v 1.2 2018/11/23 17:21:37 jmc Exp $
+.\"
+.\" Copyright (c) 2018 Reyk Floeter <reyk@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: November 23 2018 $
+.Dt PVCLOCK 4
+.Os
+.Sh NAME
+.Nm pvclock
+.Nd paravirtual clock driver
+.Sh SYNOPSIS
+.Cd "pvclock* at pvbus?"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports the paravirtual clock that is available in KVM and
+other hypervisors.
+.Nm
+uses a shared page between the host and the hypervisor to synchronize
+the TSC clock in an efficient way.
+.Sh SEE ALSO
+.Xr pvbus 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 6.5 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Reyk Floeter Aq Mt reyk@openbsd.org .