typedef enum
{
    ArbiterRequestUndefined = 4294967295,
    ArbiterRequestLegacyReported = 0,
    ArbiterRequestHalReported = 1,
    ArbiterRequestLegacyAssigned = 2,
    ArbiterRequestPnpDetected = 3,
    ArbiterRequestPnpEnumerated = 4
} ARBITER_REQUEST_SOURCE;