/*
* mem_event_mark_and_pause() tags vcpu and put it to sleep.
* The vcpu will resume execution in mem_event_wake_waiters().
*/
void mem_event_mark_and_pause(struct vcpu *v, struct mem_event_domain *med)
{
if ( !test_and_set_bit(med->pause_flag, &v->pause_flags) )
{
vcpu_pause_nosync(v);
med->blocked++;
}
}
static void vcpu_check_shutdown(struct vcpu *v)
{
struct domain *d = v->domain;
spin_lock(&d->shutdown_lock);
if ( d->is_shutting_down )
{
if ( !v->paused_for_shutdown )
vcpu_pause_nosync(v);
v->paused_for_shutdown = 1;
v->defer_shutdown = 0;
__domain_finalise_shutdown(d);
}
spin_unlock(&d->shutdown_lock);
}
void domain_shutdown(struct domain *d, u8 reason)
{
struct vcpu *v;
spin_lock(&d->shutdown_lock);
if ( d->shutdown_code == -1 )
d->shutdown_code = reason;
reason = d->shutdown_code;
if ( d->domain_id == 0 )
dom0_shutdown(reason);
if ( d->is_shutting_down )
{
spin_unlock(&d->shutdown_lock);
return;
}
d->is_shutting_down = 1;
smp_mb(); /* set shutdown status /then/ check for per-cpu deferrals */
for_each_vcpu ( d, v )
{
if ( reason == SHUTDOWN_crash )
v->defer_shutdown = 0;
else if ( v->defer_shutdown )
continue;
vcpu_pause_nosync(v);
v->paused_for_shutdown = 1;
}
__domain_finalise_shutdown(d);
spin_unlock(&d->shutdown_lock);
}