The RISC-V port was just merged to Linux a few minutes ago. This means we will be in the 4.15 release, which should be out about 10 weeks from last Sunday. As soon as the tarballs are created, the RISC-V Linux ABI will be stable, and
since we’ll ideally be in a glibc release that comes out soon after that we’ll be fully ABI stable by early in February.
RISC-V is a completely free and open ISA that hasn’t seen much adoption just yet.
It still needs (virtual) hardware specific support to actually run on anything if I’m not mistaken.
Out of tree driver do exist, again if memory serves me right.
See here for the source code:
Some of the reasons why we need something like RISC-V:
Edited 2017-11-16 22:19 UTC
Is RISC V used in the Talos workstations?