Separate concept of supervisor mode from presence of MMU #2422
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This facilitates an embedded-system design point where a secure monitor runs in M-mode, and a less-trusted application that needs to take interrupts runs in S-mode. Effectively, it's a replacement for the N extension for user-mode interrupts.
ingallsj
approved these changes
Apr 18, 2020
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This facilitates an embedded-system design point where a secure monitor runs in M-mode, and a less-trusted application that needs to take interrupts runs in S-mode.
Effectively, it's a replacement for the N extension for user-mode interrupts.
Release Notes
Support an MMU-less S-mode, for isolation of embedded processes that take interrupts.