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//0x20 bytes (sizeof)
struct _EXT_IOMMU_DEVICE
{
    VOID* Context;                                                          //0x0
    struct _EXT_IOMMU* Iommu;                                               //0x8
    ULONGLONG AssociatedDomainId;                                           //0x10
    USHORT FirmwareDomainId;                                                //0x18
    UCHAR FaultReportingEnabled;                                            //0x1a
};