Re: Privilege Levels Below User

On Fri, 07 Jun 2024 18:18:33 GMT, scott@slp53.sl.home (Scott Lurndal)
wrote:

There are already more than five security rings in most
processors.
>
Intel:   Ring 3, Ring 2 (unused), Ring 1(unused), Ring 0, VMX, Enclave,  SMM
AMD:     Ring 3, Ring 2 (unused), Ring 1(unused), Ring 0, SVM, SMM
ARM64:   Realm Monitor, EL3 (Secure monitor), EL2(Hypervisor), EL1 (Kernel), EL0 (user)

Yes, but these are multiple levels _higher_ than User, and what I was
talking about were levels *lower* than User, so I fail to see how this
indicates my idea isn't new.

Or perhaps your complaint is simply that we have too many levels
already. But that's somebody else's fault, and doesn't bear on whether
the feature I suggest might be useful.

John Savard