pte_set_hidx
new_pte |= pte_set_hidx(ptep, rpte, 0, slot, PTRS_PER_PTE);
new_pte |= pte_set_hidx(ptep, rpte, subpg_index, slot, PTRS_PER_PTE);
new_pte |= pte_set_hidx(ptep, rpte, 0, slot, PTRS_PER_PTE);
new_pte |= pte_set_hidx(ptep, rpte, 0, slot, offset);