/* Complete domain destroy after RCU readers are not holding old references. */
static void complete_domain_destroy(struct rcu_head *head)
{
struct domain *d = container_of(head, struct domain, rcu);
struct vcpu *v;
int i;
for ( i = d->max_vcpus - 1; i >= 0; i-- )
{
if ( (v = d->vcpu[i]) == NULL )
continue;
tasklet_kill(&v->continue_hypercall_tasklet);
vcpu_destroy(v);
sched_destroy_vcpu(v);
destroy_waitqueue_vcpu(v);
}
grant_table_destroy(d);
arch_domain_destroy(d);
watchdog_domain_destroy(d);
rangeset_domain_destroy(d);
cpupool_rm_domain(d);
sched_destroy_domain(d);
/* Free page used by xen oprofile buffer. */
free_xenoprof_pages(d);
xfree(d->mem_event);
for ( i = d->max_vcpus - 1; i >= 0; i-- )
if ( (v = d->vcpu[i]) != NULL )
free_vcpu_struct(v);
if ( d->target != NULL )
put_domain(d->target);
evtchn_destroy_final(d);
xfree(d->pirq_mask);
xfree(d->pirq_to_evtchn);
xsm_free_security_domain(d);
free_domain_struct(d);
send_guest_global_virq(dom0, VIRQ_DOM_EXC);
}
struct vcpu *alloc_vcpu(
struct domain *d, unsigned int vcpu_id, unsigned int cpu_id)
{
struct vcpu *v;
BUG_ON((!is_idle_domain(d) || vcpu_id) && d->vcpu[vcpu_id]);
if ( (v = alloc_vcpu_struct()) == NULL )
return NULL;
v->domain = d;
v->vcpu_id = vcpu_id;
spin_lock_init(&v->virq_lock);
tasklet_init(&v->continue_hypercall_tasklet, NULL, 0);
if ( !zalloc_cpumask_var(&v->cpu_affinity) ||
!zalloc_cpumask_var(&v->cpu_affinity_tmp) ||
!zalloc_cpumask_var(&v->cpu_affinity_saved) ||
!zalloc_cpumask_var(&v->vcpu_dirty_cpumask) )
goto fail_free;
if ( is_idle_domain(d) )
{
v->runstate.state = RUNSTATE_running;
}
else
{
v->runstate.state = RUNSTATE_offline;
v->runstate.state_entry_time = NOW();
set_bit(_VPF_down, &v->pause_flags);
v->vcpu_info = ((vcpu_id < XEN_LEGACY_MAX_VCPUS)
? (vcpu_info_t *)&shared_info(d, vcpu_info[vcpu_id])
: &dummy_vcpu_info);
v->vcpu_info_mfn = INVALID_MFN;
init_waitqueue_vcpu(v);
}
if ( sched_init_vcpu(v, cpu_id) != 0 )
goto fail_wq;
if ( vcpu_initialise(v) != 0 )
{
sched_destroy_vcpu(v);
fail_wq:
destroy_waitqueue_vcpu(v);
fail_free:
free_cpumask_var(v->cpu_affinity);
free_cpumask_var(v->cpu_affinity_tmp);
free_cpumask_var(v->cpu_affinity_saved);
free_cpumask_var(v->vcpu_dirty_cpumask);
free_vcpu_struct(v);
return NULL;
}
d->vcpu[vcpu_id] = v;
if ( vcpu_id != 0 )
{
int prev_id = v->vcpu_id - 1;
while ( (prev_id >= 0) && (d->vcpu[prev_id] == NULL) )
prev_id--;
BUG_ON(prev_id < 0);
v->next_in_list = d->vcpu[prev_id]->next_in_list;
d->vcpu[prev_id]->next_in_list = v;
}
/* Must be called after making new vcpu visible to for_each_vcpu(). */
vcpu_check_shutdown(v);
domain_update_node_affinity(d);
return v;
}
