static int grow_gnttab_list(unsigned int more_frames)
{
unsigned int new_nr_grant_frames, extra_entries, i;
+ unsigned int nr_glist_frames, new_nr_glist_frames;
new_nr_grant_frames = nr_grant_frames + more_frames;
extra_entries = more_frames * GREFS_PER_GRANT_FRAME;
- for (i = nr_grant_frames; i < new_nr_grant_frames; i++) {
+ nr_glist_frames = (nr_grant_frames * GREFS_PER_GRANT_FRAME + RPP - 1) / RPP;
+ new_nr_glist_frames =
+ (new_nr_grant_frames * GREFS_PER_GRANT_FRAME + RPP - 1) / RPP;
+ for (i = nr_glist_frames; i < new_nr_glist_frames; i++) {
gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_ATOMIC);
if (!gnttab_list[i])
goto grow_nomem;
return 0;
grow_nomem:
- for ( ; i >= nr_grant_frames; i--)
+ for ( ; i >= nr_glist_frames; i--)
free_page((unsigned long) gnttab_list[i]);
return -ENOMEM;
}
return xen_max;
}
-static int map_pte_fn(pte_t *pte, struct page *pmd_page,
- unsigned long addr, void *data)
-{
- unsigned long **frames = (unsigned long **)data;
-
- set_pte_at(&init_mm, addr, pte, mfn_pte((*frames)[0], PAGE_KERNEL));
- (*frames)++;
- return 0;
-}
-
-static int unmap_pte_fn(pte_t *pte, struct page *pmd_page,
- unsigned long addr, void *data)
-{
-
- set_pte_at(&init_mm, addr, pte, __pte(0));
- return 0;
-}
-
static int gnttab_map(unsigned int start_idx, unsigned int end_idx)
{
struct gnttab_setup_table setup;
setup.dom = DOMID_SELF;
setup.nr_frames = nr_gframes;
- setup.frame_list = frames;
+ set_xen_guest_handle(setup.frame_list, frames);
rc = HYPERVISOR_grant_table_op(GNTTABOP_setup_table, &setup, 1);
if (rc == -ENOSYS) {
BUG_ON(rc || setup.status);
- if (shared == NULL) {
- struct vm_struct *area;
- area = alloc_vm_area(PAGE_SIZE * max_nr_grant_frames());
- BUG_ON(area == NULL);
- shared = area->addr;
- }
- rc = apply_to_page_range(&init_mm, (unsigned long)shared,
- PAGE_SIZE * nr_gframes,
- map_pte_fn, &frames);
+ rc = arch_gnttab_map_shared(frames, nr_gframes, max_nr_grant_frames(),
+ &shared);
BUG_ON(rc);
- frames -= nr_gframes; /* adjust after map_pte_fn() */
kfree(frames);
static int gnttab_suspend(void)
{
- apply_to_page_range(&init_mm, (unsigned long)shared,
- PAGE_SIZE * nr_grant_frames,
- unmap_pte_fn, NULL);
-
+ arch_gnttab_unmap_shared(shared, nr_grant_frames);
return 0;
}
static int __devinit gnttab_init(void)
{
int i;
- unsigned int max_nr_glist_frames;
+ unsigned int max_nr_glist_frames, nr_glist_frames;
unsigned int nr_init_grefs;
if (!is_running_on_xen())
* grant reference free list on the current hypervisor.
*/
max_nr_glist_frames = (boot_max_nr_grant_frames *
- GREFS_PER_GRANT_FRAME /
- (PAGE_SIZE / sizeof(grant_ref_t)));
+ GREFS_PER_GRANT_FRAME / RPP);
gnttab_list = kmalloc(max_nr_glist_frames * sizeof(grant_ref_t *),
GFP_KERNEL);
if (gnttab_list == NULL)
return -ENOMEM;
- for (i = 0; i < nr_grant_frames; i++) {
+ nr_glist_frames = (nr_grant_frames * GREFS_PER_GRANT_FRAME + RPP - 1) / RPP;
+ for (i = 0; i < nr_glist_frames; i++) {
gnttab_list[i] = (grant_ref_t *)__get_free_page(GFP_KERNEL);
if (gnttab_list[i] == NULL)
goto ini_nomem;