/*
* We'll stop somewhere inside this hypercall. When it returns,
* we'll start resuming after the restore.
*/
HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
shutting_down = SHUTDOWN_INVALID;
post_suspend();
gnttab_resume();
irq_resume();
time_resume();
switch_idle_mm();
local_irq_enable();
xencons_resume();
xenbus_resume();
smp_resume();
return err;
}
#endif /* CONFIG_XEN */
extern int __xen_suspend(int fast_suspend);
static int shutdown_process(void *__unused)
{
static char *envp[] = { "HOME=/", "TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
static char *poweroff_argv[] = { "/sbin/poweroff", NULL };
#ifdef CONFIG_XEN
extern asmlinkage long sys_reboot(int magic1, int magic2,
unsigned int cmd, void *arg);
#endif
if ((shutting_down == SHUTDOWN_POWEROFF) ||
(shutting_down == SHUTDOWN_HALT)) {
if (call_usermodehelper("/sbin/poweroff", poweroff_argv,
envp, 0) < 0) {
#ifdef CONFIG_XEN
sys_reboot(LINUX_REBOOT_MAGIC1,
LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_POWER_OFF,
NULL);
#endif /* CONFIG_XEN */
}
}
shutting_down = SHUTDOWN_INVALID; /* could try again */
return 0;
}
#ifndef CONFIG_XEN /* pv-on-hvm */
static int xen_suspend(void *__unused)
{
int err = __xen_suspend(fast_suspend);
if (err)
printk(KERN_ERR "Xen suspend failed (%d)\n", err);
shutting_down = SHUTDOWN_INVALID;
return 0;
}
static int xen_suspend(void *__unused)
{
int err, old_state;
daemonize("suspend");
err = set_cpus_allowed(current, cpumask_of_cpu(0));
if (err) {
printk(KERN_ERR "Xen suspend can't run on CPU0 (%d)\n", err);
goto fail;
}
do {
err = __xen_suspend(fast_suspend, xen_resume_notifier);
if (err) {
printk(KERN_ERR "Xen suspend failed (%d)\n", err);
goto fail;
}
if (!suspend_cancelled)
setup_suspend_evtchn();
old_state = cmpxchg(
&shutting_down, SHUTDOWN_RESUMING, SHUTDOWN_INVALID);
} while (old_state == SHUTDOWN_SUSPEND);
switch (old_state) {
case SHUTDOWN_INVALID:
case SHUTDOWN_SUSPEND:
BUG();
case SHUTDOWN_RESUMING:
break;
default:
schedule_work(&shutdown_work);
break;
}
return 0;
fail:
old_state = xchg(&shutting_down, SHUTDOWN_INVALID);
BUG_ON(old_state != SHUTDOWN_SUSPEND);
return 0;
}