Linux has a no MMU mode where it works very well without an MMU, just using an MPU for process isolation. I'm not sure if it's been ported to RISC-V M mode tho

Linux has a no MMU mode where it works very well without an MMU, just using an MPU for process isolation. I'm not sure if it's been ported to RISC-V M mode though. Edit: looks like there is already a port https://www.cnx-software.com/2020/02/17/how-to-build-run-linux-on-kendryte-k210-risc-v-nommu-processor/ https://www.cnx-software.com/2020/02/17/how-to-build-run-lin...