[tmm]

> Maybe we use some of those extra protection rings?

Maybe not. Intel is considering removing rings 1 and 2 for a future 64-bit only x86 architecture, because they "are unused by modern software".

https://www.intel.com/content/www/us/en/developer/articles/t...

[bluGill]

I don't think those extra rings would be useful for what is needed anyway.