Unity PlatformRVM — the virtual machine monitor for microcontrollers

Paravirtualize the RTOS you already use. Run 64 virtual machines on 1 MB of SRAM, with capability-based isolation, on real embedded hardware.

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User Manual (PDF)

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7 paravirtualized RTOS guests

RMP, FreeRTOS, uC/OS-II, uC/OS-III, RT-Thread, DjyOS and KLite run as unprivileged RVM guests. The ports are drop-in overlays — official kernel files are never modified.

Guest support matrix

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Bounded, predictable overhead

A virtualized FreeRTOS switches contexts in about 4x the cycles of the bare-metal one — still roughly 25x faster than RT-Linux. For compute-bound guests the overhead is negligible.

Read the cost analysis

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Capability-based isolation

RVM builds on the RME Concord microkernel. Every guest is confined by capability-based memory protection — a buggy or hostile task can no longer take down the whole system.

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Numbers from real hardware

Every benchmark row was captured on actual boards — STM32G071, STM32F429, STM32H743 and CH32V307 — across Keil, IAR and GCC toolchains at the highest optimization levels.

Benchmark tables

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Three architectures

ARMv6-M (Cortex-M0+), ARMv7-M (Cortex-M3/M4/M7) and RV32 (RISC-V) are supported, with project generation for GCC Makefile, Keil uVision and IAR EWARM.

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Public domain

An official work of EDI, released into the public domain. All rights granted to all entities, to the maximum extent permitted by law.