union _IOMMU_ATS_SETTINGS// Size=0x1
{
    unsigned char AtsSupported:1;// Offset=0x0 Size=0x1 BitOffset=0x0 BitSize=0x1
    unsigned char AtsRequired:1;// Offset=0x0 Size=0x1 BitOffset=0x1 BitSize=0x1
    unsigned char Rsvd:6;// Offset=0x0 Size=0x1 BitOffset=0x2 BitSize=0x6
    unsigned char AsUCHAR;// Offset=0x0 Size=0x1
};