Verifying RISC-V Physical Memory Protection. (arXiv:2211.02179v1 [cs.CR])

We formally verify an open-source hardware implementation of physical memory
protection (PMP) in RISC-V, which is a standard feature used for memory
isolation in security critical systems such as the Keystone trusted execution
environment. PMP provides per-hardware-thread machine-mode control registers
that specify the access privileges for physical memory regions. We first
formalize the functional property of the PMP rules based on the RISC-V ISA
manual. Then, we use the LIME tool to translate an open-source implementation
of the PMP hardware …

memory memory protection physical protection