static void increase_reservation(struct memop_args *a)
{
struct page_info *page;
unsigned long i;
xen_pfn_t mfn;
struct domain *d = a->domain;
if ( !guest_handle_is_null(a->extent_list) &&
!guest_handle_subrange_okay(a->extent_list, a->nr_done,
a->nr_extents-1) )
return;
if ( !multipage_allocation_permitted(current->domain, a->extent_order) )
return;
mcd_mem_inc_trap(a->domain, (a->nr_extents - a->nr_done));
for ( i = a->nr_done; i < a->nr_extents; i++ )
{
if ( hypercall_preempt_check() )
{
a->preempted = 1;
goto out;
}
page = alloc_domheap_pages(d, a->extent_order, a->memflags);
if ( unlikely(page == NULL) )
{
gdprintk(XENLOG_INFO, "Could not allocate order=%d extent: "
"id=%d memflags=%x (%ld of %d)\n",
a->extent_order, d->domain_id, a->memflags,
i, a->nr_extents);
goto out;
}
/* Inform the domain of the new page's machine address. */
if ( !guest_handle_is_null(a->extent_list) )
{
mfn = page_to_mfn(page);
if ( unlikely(__copy_to_guest_offset(a->extent_list, i, &mfn, 1)) )
goto out;
}
}
out:
a->nr_done = i;
mcd_mem_upt_trap(d);
}
/* Update per-VCPU guest runstate shared memory area (if registered). */
static void update_runstate_area(struct vcpu *v)
{
if ( guest_handle_is_null(runstate_guest(v)) )
return;
__copy_to_guest(runstate_guest(v), &v->runstate, 1);
}
/* Update per-VCPU guest runstate shared memory area (if registered). */
static void update_runstate_area(struct vcpu *v)
{
void __user *guest_handle = NULL;
if ( guest_handle_is_null(runstate_guest(v)) )
return;
if ( VM_ASSIST(v->domain, runstate_update_flag) )
{
guest_handle = &v->runstate_guest.p->state_entry_time + 1;
guest_handle--;
v->runstate.state_entry_time |= XEN_RUNSTATE_UPDATE;
__raw_copy_to_guest(guest_handle,
(void *)(&v->runstate.state_entry_time + 1) - 1, 1);
smp_wmb();
}
__copy_to_guest(runstate_guest(v), &v->runstate, 1);
if ( guest_handle )
{
v->runstate.state_entry_time &= ~XEN_RUNSTATE_UPDATE;
smp_wmb();
__raw_copy_to_guest(guest_handle,
(void *)(&v->runstate.state_entry_time + 1) - 1, 1);
}
}