The RISC-V privileged ISA is not yet finalized. Have the seL4 developers reviewed the draft [1], in case they might have any recommendations for improvement? For example, just last year a blunder (H-mode) was removed from the draft per a proposal [2] on the mailing list. Finalization is planned for this year. Speak now or forever hold your peace. The first public draft of the memory consistency model [3] was also released just last December. And platform standardization, especially the IOMMU, is in progress. [1] https://content.riscv.org/wp-content/uploads/2017/05/riscv-privileged-v1.10.... [2] https://groups.google.com/a/groups.riscv.org/forum/#!msg/isa-dev/SfEDPLU0NU4... [3] https://groups.google.com/a/groups.riscv.org/forum/#!topic/isa-dev/hKywNHBkA...