Metadatacopyunion _IOMMU_ATS_SETTINGS { struct { unsigned char AtsSupported : 1;/* 0x0:0 1 */ unsigned char AtsRequired : 1;/* 0x0:1 1 */ unsigned char Rsvd : 6;/* 0x0:2 1 */ };/* 0x0 1 */ unsigned char AsUCHAR;/* 0x0 1 */};