NTSTATUS __fastcall IvtInvalidateAllContextEntries(_QWORD *a1){ INT64 v2; __int64 v4[3]; v4[1] = 0i64; v4[0] = 17i64; IvtIommuSendCommand(a1, v4, 0); return IvtIommuWaitCommand((INT64)a1, v2, 0i64); }