ARM_SMMU_FEAT_NESTING
if (!(smmu->features & ARM_SMMU_FEAT_NESTING))
if (!(smmu->features & ARM_SMMU_FEAT_NESTING)) {
smmu->features &= ~ARM_SMMU_FEAT_NESTING;
smmu->features &= ~ARM_SMMU_FEAT_NESTING;
smmu->features |= ARM_SMMU_FEAT_NESTING;