FIFO_INVALID_ENTRY
if ((entry->stamp.nx.pswid == cpu_to_be32(FIFO_INVALID_ENTRY))
entry->stamp.nx.pswid = cpu_to_be32(FIFO_INVALID_ENTRY);
memset(vinst->fault_fifo, FIFO_INVALID_ENTRY, vinst->fault_fifo_size);