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Linux and RISC-V by 2030
(lemmy.ml)
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I'm not gonna say "don't do it", but I've dug into this deeply and I've turned away from RISC V.
RISC V is slowly being pidgeon-holed into embedded systems. This is not a bad thing, the embedded market (cars, tvs, industrial controls) is huge and diverse.
RISC V has had a very rough start to introduction into bridge-and-bus systems the way we know from Intel/amd because there have simply been too many iterations of CPU registers and capability flags for integrators to take the platform seriously enough to commit to piling a bunch of effort to design, produce, and lead sales on any RISC V platform. Even arm (especially v9) has settled some of these platform issues and is ahead of RISC V in adoption in the integrated platform space (as opposed to embedded).
Long story long, it is extremely difficult to write device drivers for RISC V because one would have to write half a dozen architecture versions, just for a niche platform that barely sells. Conversely, an embedded controller for, say, a vehicle gets a preliminary build and few revisions, ongoing support isn't part of planning the same way.