Hi folks. I'm looking at checkpointing fast models, and one thing I'll have to put into the checkpoint is something for the TLBs. I was looking at what they checkpoint, and I think all of it should be removed from checkpoints.
As far as I know: _attr: A cached value which is an implementation detail and not architecturally visible. haveLPAE: A setting which is not architectural/software visible state. directToStage2: Derived state which comes from miscregs. Can be recovered on first use by updateMiscRegs if miscRegValid is false (which it is on construction). stage2Reg, stage2DescReq: Information about in flight translations? These should not be in flight when a checkpoint is taken since state should have drained. TLB entries which can be reloaded in the new TLB. The new TLB won't necessarily have the same size as the old one, and so can't necessarily have the same table of entries. The entries are not (as far as I know) architecturally visible. All of this state can and should be removed from checkpoints as far as I can tell. Please let me know if I'm wrong about some bit of this. Gabe _______________________________________________ gem5-dev mailing list [email protected] http://m5sim.org/mailman/listinfo/gem5-dev
