this is a good start

imho,  perhaps not not for sv57,  but for sv64,  we incorporate some of the suggestions

  of the KASLR people.  there are linux versions that implement their suggestions.  perhaps only for sv64.

but thus should be up to discussion

It hasn’t been standardized yet, but there is a placeholder for the Sv57 encoding in the satp.MODE register field. There isn’t a chapter on the Sv57 spec, but it will follow the pattern of Sv39 -> Sv48, with one additional page-table level.

I will suggest to the virtual memory task group that we include Sv57 in the next batch of things we put up for ratification.

On Wed, Nov 25, 2020 at 2:15 PM swallach <steven.wallach@...> wrote:

is this documented?

much appreciated

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