Hoy Dan ! While you are around ... I have a question :-)
Do you happen to remember what the story is with the invalidation of "unpopulated" (aka invalid) entries ? IE. We create those in the 8xx TLB miss when the PTE is !present (or the PMD is absent). Those then cause a TLB error on the next access which allows us to process the page fault. But when/how are those invalid entries supposed to be invalidated ? The doco seems to hint that at least in the case of an entry with the wrong C bit (store to an entry with C=0), the HW automatically invalidates it before taking the TLB Error but that's all I found. Is there a general HW policy on 8xx to invalidate TLB entries that cause TLB errors ? Or is the kernel expected to do it most of the time ? Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
