_IOMMU_DEVICE_PROPERTIES

//0x4 bytes (sizeof) union _IOMMU_DEVICE_PROPERTIES { ULONG IsThunderbolt:1; //0x0 ULONG DmaCapableAtBoot:1; //0x0 ULONG ForceDisableDmaRemapping:1; //0x0 ULONG IsUntrustedPort:1; //0x0 ULONG Rsvd:28; //0x0 ULONG AsULONG; //0x0 };