Hi Gabe and everyone, Thanks Gabe for bringing this up. Currently I am making a model in AXI protocol and this model will need the AxUser and AxProt fields in the AXI protocol. The packet in gem5 cannot carry additional information except the actual read/write data. I think we can have the extension mechanism in our gem5 packet just like the way in SystemC. Therefore, we can simulate some protocol-related behavior with this extension in each gem5 packet.
I think we can have an array-based or linked-list-based extension mechanism in gem5 packet. That is, we can have multiple extensions in one packet and may be increased during the transaction. But we can discuss the way of searching for one extension. In systemc, it uses linear search to find if one extension exists or not. Look forward to any feedback or ideas, and thanks for your sharing. Yan On Thu, Apr 14, 2022 at 3:37 PM Gabe Black <gabe.bl...@gmail.com> wrote: > Hi folks. Yan Lee, a Google colleague of mine, is interested in adding one > or more extension objects to gem5 Packet. Systemc has a mechanism like this > already, and it's come up a few times where we've wanted to have something > like this on the gem5 side as well. > > Yan, can you please talk about the problem you're trying to solve, and the > mechanism you want to add to handle it? > > Gabe >
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