VIOMMU_STRUCT_SIZE
return VIOMMU_STRUCT_SIZE(struct amd_iommu_viommu, core);
return VIOMMU_STRUCT_SIZE(struct arm_vsmmu, core);
return VIOMMU_STRUCT_SIZE(struct tegra241_vintf, vsmmu.core);
return VIOMMU_STRUCT_SIZE(struct mock_viommu, core);