Cortex-R8 QoS enable limitation

according to R8 TRM, chapter 8.5 System configurability and QoS, it says "If the processor uses the QoS feature and address filtering is enabled for AXI master port 1, the slave connected to AXI master port 1 must be private to the processor.". So how to understand the private slave ? does it mean this slave port must be accessable for R8 only and other masters such as DMA should not access to this slave?

Thank you