Richard Henderson <r...@twiddle.net> writes: > On 01/24/2017 12:31 PM, Alex Bennée wrote: >>> Why don't we just pass in this bitmap in the first place? It's much better >>> than having to use varargs in tlb_flush_by_mmuidx... >> >> We could. By not messing with the API it leaves the door open to having >> other non-MTTCG architectures that have lots of MMU indexes versus a >> hard limit based on page-size. That said I think the number of indexes >> also affects the size of the TLB so I guess the current design is >> limited for arbitrarily large sets if indexes? > > We hard-limit at 12 indices, though even that is arguably too high. > I hope we never see more than PPC's current 8.
Hmm there is quite a lot of churn in the ARM code to move from an index to a bitmap. It should be mostly mechanical but we'll see. -- Alex Bennée
