Yes, I understand that. What I do not understand is where they /are/ held. Is
a big chunk of storage partitioned off and made unaddressable? Is the TLB
actually big enough to store the entire thing (possible, but surely this memory
could be better used for cache)? Is it separate storage (unlikely)? Etc.
Best wishes / Mejores deseos / Meilleurs vœux
Ian ...
On Tuesday, November 22, 2022 at 04:57:56 PM GMT+1, Joe Monk
<[email protected]> wrote:
"Storage keys are not part of addressable storage."
http://publibfp.dhe.ibm.com/epubs/pdf/a227832d.pdf page 3-9
Joe
On Tue, Nov 22, 2022 at 9:22 AM Ian Worthington <
[email protected]> wrote:
> Does anyone know where the storage protection keys are kept? It seems
> that the processors maintain recent keys in the TLB to be accessed by the
> DAT, but where do they live when they're not in the TLB? Surely we need
> one byte per 4k page per address space, which could be quite a bit of
> storage, so I'm assuming this has to be above the bar now? I can't see any
> information in the pop about this.
>
>
> Best wishes / Mejores deseos / Meilleurs vœux
>
> Ian ...
>
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