int cpumask_to_xenctl_cpumap(
struct xenctl_cpumap *xenctl_cpumap, const cpumask_t *cpumask)
{
unsigned int guest_bytes, copy_bytes, i;
uint8_t zero = 0;
int err = 0;
uint8_t *bytemap = xmalloc_array(uint8_t, (nr_cpu_ids + 7) / 8);
if ( !bytemap )
return -ENOMEM;
guest_bytes = (xenctl_cpumap->nr_cpus + 7) / 8;
copy_bytes = min_t(unsigned int, guest_bytes, (nr_cpu_ids + 7) / 8);
bitmap_long_to_byte(bytemap, cpumask_bits(cpumask), nr_cpu_ids);
if ( copy_bytes != 0 )
if ( copy_to_guest(xenctl_cpumap->bitmap, bytemap, copy_bytes) )
err = -EFAULT;
for ( i = copy_bytes; !err && i < guest_bytes; i++ )
if ( copy_to_guest_offset(xenctl_cpumap->bitmap, i, &zero, 1) )
err = -EFAULT;
xfree(bytemap);
return err;
}
struct domain *alloc_domain_struct(void)
{
struct domain *d;
BUILD_BUG_ON(sizeof(*d) > PAGE_SIZE);
d = alloc_xenheap_pages(0, 0);
if ( d == NULL )
return NULL;
clear_page(d);
d->arch.grant_table_gpfn = xmalloc_array(xen_pfn_t, max_nr_grant_frames);
return d;
}
struct domain *domain_create(
domid_t domid, unsigned int domcr_flags, ssidref_t ssidref)
{
struct domain *d, **pd;
enum { INIT_xsm = 1u<<0, INIT_watchdog = 1u<<1, INIT_rangeset = 1u<<2,
INIT_evtchn = 1u<<3, INIT_gnttab = 1u<<4, INIT_arch = 1u<<5 };
int init_status = 0;
int poolid = CPUPOOLID_NONE;
if ( (d = alloc_domain_struct()) == NULL )
return NULL;
d->domain_id = domid;
lock_profile_register_struct(LOCKPROF_TYPE_PERDOM, d, domid, "Domain");
if ( xsm_alloc_security_domain(d) != 0 )
goto fail;
init_status |= INIT_xsm;
watchdog_domain_init(d);
init_status |= INIT_watchdog;
atomic_set(&d->refcnt, 1);
spin_lock_init_prof(d, domain_lock);
spin_lock_init_prof(d, page_alloc_lock);
spin_lock_init(&d->hypercall_deadlock_mutex);
INIT_PAGE_LIST_HEAD(&d->page_list);
INIT_PAGE_LIST_HEAD(&d->xenpage_list);
spin_lock_init(&d->node_affinity_lock);
spin_lock_init(&d->shutdown_lock);
d->shutdown_code = -1;
if ( domcr_flags & DOMCRF_hvm )
d->is_hvm = 1;
if ( domid == 0 )
{
d->is_pinned = opt_dom0_vcpus_pin;
d->disable_migrate = 1;
}
rangeset_domain_initialise(d);
init_status |= INIT_rangeset;
d->iomem_caps = rangeset_new(d, "I/O Memory", RANGESETF_prettyprint_hex);
d->irq_caps = rangeset_new(d, "Interrupts", 0);
if ( (d->iomem_caps == NULL) || (d->irq_caps == NULL) )
goto fail;
if ( domcr_flags & DOMCRF_dummy )
return d;
if ( !is_idle_domain(d) )
{
if ( xsm_domain_create(d, ssidref) != 0 )
goto fail;
d->is_paused_by_controller = 1;
atomic_inc(&d->pause_count);
if ( domid )
d->nr_pirqs = nr_irqs_gsi + extra_domU_irqs;
else
d->nr_pirqs = nr_irqs_gsi + extra_dom0_irqs;
if ( d->nr_pirqs > nr_irqs )
d->nr_pirqs = nr_irqs;
d->pirq_to_evtchn = xmalloc_array(u16, d->nr_pirqs);
d->pirq_mask = xmalloc_array(
unsigned long, BITS_TO_LONGS(d->nr_pirqs));
if ( (d->pirq_to_evtchn == NULL) || (d->pirq_mask == NULL) )
goto fail;
memset(d->pirq_to_evtchn, 0, d->nr_pirqs * sizeof(*d->pirq_to_evtchn));
bitmap_zero(d->pirq_mask, d->nr_pirqs);
if ( evtchn_init(d) != 0 )
goto fail;
init_status |= INIT_evtchn;
if ( grant_table_create(d) != 0 )
goto fail;
init_status |= INIT_gnttab;
poolid = 0;
d->mem_event = xzalloc(struct mem_event_per_domain);
if ( !d->mem_event )
goto fail;
}
if ( arch_domain_create(d, domcr_flags) != 0 )
goto fail;
init_status |= INIT_arch;
if ( cpupool_add_domain(d, poolid) != 0 )
goto fail;
if ( sched_init_domain(d) != 0 )
goto fail;
if ( !is_idle_domain(d) )
{
spin_lock(&domlist_update_lock);
pd = &domain_list; /* NB. domain_list maintained in order of domid. */
for ( pd = &domain_list; *pd != NULL; pd = &(*pd)->next_in_list )
if ( (*pd)->domain_id > d->domain_id )
break;
d->next_in_list = *pd;
d->next_in_hashbucket = domain_hash[DOMAIN_HASH(domid)];
rcu_assign_pointer(*pd, d);
rcu_assign_pointer(domain_hash[DOMAIN_HASH(domid)], d);
spin_unlock(&domlist_update_lock);
}
return d;
fail:
d->is_dying = DOMDYING_dead;
atomic_set(&d->refcnt, DOMAIN_DESTROYED);
xfree(d->mem_event);
if ( init_status & INIT_arch )
arch_domain_destroy(d);
if ( init_status & INIT_gnttab )
grant_table_destroy(d);
if ( init_status & INIT_evtchn )
{
evtchn_destroy(d);
evtchn_destroy_final(d);
}
if ( init_status & INIT_rangeset )
rangeset_domain_destroy(d);
if ( init_status & INIT_watchdog )
watchdog_domain_destroy(d);
if ( init_status & INIT_xsm )
xsm_free_security_domain(d);
xfree(d->pirq_mask);
xfree(d->pirq_to_evtchn);
free_domain_struct(d);
return NULL;
}