1ffac39deSConrad Meyer /*- 2ffac39deSConrad Meyer * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3ffac39deSConrad Meyer * 4ffac39deSConrad Meyer * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>. All rights reserved. 5ffac39deSConrad Meyer * 6ffac39deSConrad Meyer * Redistribution and use in source and binary forms, with or without 7ffac39deSConrad Meyer * modification, are permitted provided that the following conditions 8ffac39deSConrad Meyer * are met: 9ffac39deSConrad Meyer * 1. Redistributions of source code must retain the above copyright 10ffac39deSConrad Meyer * notice, this list of conditions and the following disclaimer. 11ffac39deSConrad Meyer * 2. Redistributions in binary form must reproduce the above copyright 12ffac39deSConrad Meyer * notice, this list of conditions and the following disclaimer in the 13ffac39deSConrad Meyer * documentation and/or other materials provided with the distribution. 14ffac39deSConrad Meyer * 15ffac39deSConrad Meyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16ffac39deSConrad Meyer * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17ffac39deSConrad Meyer * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18ffac39deSConrad Meyer * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19ffac39deSConrad Meyer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20ffac39deSConrad Meyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21ffac39deSConrad Meyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22ffac39deSConrad Meyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23ffac39deSConrad Meyer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24ffac39deSConrad Meyer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25ffac39deSConrad Meyer * SUCH DAMAGE. 26ffac39deSConrad Meyer * 27ffac39deSConrad Meyer * $FreeBSD$ 28ffac39deSConrad Meyer */ 29ffac39deSConrad Meyer #include <sys/_eventhandler.h> 30ffac39deSConrad Meyer 31ffac39deSConrad Meyer /* 32ffac39deSConrad Meyer * VM Generation Counter driver 33ffac39deSConrad Meyer * 34ffac39deSConrad Meyer * This driver has two functions: first, it provides a system event (both in 35ffac39deSConrad Meyer * the kernel EVENTHANDLER framework as well as a userspace devctl event) 36ffac39deSConrad Meyer * whenever a VM has been (HyperV doc, for example): 37ffac39deSConrad Meyer * - Snapped and the snapshot is executing 38ffac39deSConrad Meyer * - Recovered from backup 39ffac39deSConrad Meyer * - Failed over in a HA setup 40ffac39deSConrad Meyer * - Imported, copied, or cloned 41ffac39deSConrad Meyer * - And unspecified if VM configuration changes might cause a changed 42ffac39deSConrad Meyer * generation counter 43ffac39deSConrad Meyer * 44ffac39deSConrad Meyer * Second, it can read the current VM generation counter, a 128-bit GUID. 45ffac39deSConrad Meyer */ 46ffac39deSConrad Meyer typedef void (*vmgenc_handler)(void *); 47ffac39deSConrad Meyer EVENTHANDLER_DECLARE(acpi_vmgenc_event, vmgenc_handler); 48