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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
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/*-
* Copyright (c) 2008 Citrix Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/xen/xenpci/machine_reboot.c 189699 2009-03-11 15:30:12Z dfr $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/interrupt.h>
#include <machine/atomic.h>
#include <machine/xen/xen-os.h>
#include <xen/hypervisor.h>
#include <xen/xen_intr.h>
#include <dev/xen/xenpci/xenpcivar.h>
void
xen_suspend()
{
int suspend_cancelled;
if (DEVICE_SUSPEND(root_bus)) {
printf("xen_suspend: device_suspend failed\n");
return;
}
/*
* Make sure we don't change cpus or switch to some other
* thread. for the duration.
*/
critical_enter();
/*
* Prevent any races with evtchn_interrupt() handler.
*/
irq_suspend();
disable_intr();
suspend_cancelled = HYPERVISOR_suspend(0);
if (!suspend_cancelled)
xenpci_resume();
/*
* Re-enable interrupts and put the scheduler back to normal.
*/
enable_intr();
critical_exit();
/*
* FreeBSD really needs to add DEVICE_SUSPEND_CANCEL or
* similar.
*/
if (!suspend_cancelled)
DEVICE_RESUME(root_bus);
}