STRTAB_SPLIT
val |= FIELD_PREP(STRTAB_L1_DESC_SPAN, STRTAB_SPLIT + 1);
ilog2(cfg->l2.num_l1_ents) + STRTAB_SPLIT) |
FIELD_PREP(STRTAB_BASE_CFG_SPLIT, STRTAB_SPLIT);
if (smmu->sid_bits <= STRTAB_SPLIT)
#define STRTAB_NUM_L2_STES (1 << STRTAB_SPLIT)