Software-Defined CPU-Modes

In recent years, CPU manufacturers have introduced additional op-
erating modes to their CPUs, in addition to privileged and unprivileged
modes, like Intel SGX or ARM Trustzone. These modes are all imple-
mented in hardware and are therefore need to be taken as is to the op-
erating system and applications. This development raises the question of
whether it is possible to define such modes in software and what challenges
are associated with this approach. In this presentation, I will explain the
concept of a ”Mode-Switch-Mode” and a unique ”Control Core” designed
to address this challenge.

(Großer Beleg)