static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
{
unsigned long slot_offset;
unsigned long lpar_rc;
int i;
unsigned long dummy1, dummy2;
/* pick a random slot to start at */
slot_offset = mftb() & 0x7;
for (i = 0; i < HPTES_PER_GROUP; i++) {
/* don't remove a bolted entry */
lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
(0x1UL << 4), &dummy1, &dummy2);
if (lpar_rc == H_SUCCESS)
return i;
/*
* The test for adjunct partition is performed before the
* ANDCOND test. H_RESOURCE may be returned, so we need to
* check for that as well.
*/
BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
slot_offset++;
slot_offset &= 0x7;
}
return -1;
}
static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
int psize, int apsize,
int ssize, int local)
{
unsigned long want_v;
unsigned long lpar_rc;
unsigned long dummy1, dummy2;
pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
slot, vpn, psize, local);
want_v = hpte_encode_avpn(vpn, psize, ssize);
lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
if (lpar_rc == H_NOT_FOUND)
return;
BUG_ON(lpar_rc != H_SUCCESS);
}
static void gnttab_pre_unmap_grant_ref(
struct gnttab_unmap_grant_ref *unmap, int count)
{
long slot;
int i;
ulong ea;
unsigned long dummy1, dummy2;
ulong flags;
/* paranoia */
local_irq_save(flags);
for (i = 0 ; i < count; i++) {
struct page *page;
ea = (ulong)__va(unmap[i].host_addr);
page = virt_to_page(ea);
if (!gnt_unmap(page)) {
DBG("%s[0x%x]: skip: 0x%lx, mapcount 0x%x\n",
__func__, i, ea, gnt_mapcount(page));
continue;
}
slot = find_map_slot(ea);
if (slot < 0) {
printk(KERN_EMERG "%s: PTE not found: 0x%lx\n",
__func__, ea);
continue;
}
DBG("%s[0x%x]: 0x%lx: mapcount: 0x%x\n",
__func__, i, ea, gnt_mapcount(page));
plpar_pte_remove(0, slot, 0, &dummy1, &dummy2);
}
local_irq_restore(flags);
}
