alt Hacker NewsRISC-V the ISA is open; RISC-V implementations need not be. There's no reason to believe that any truly high-performance implementations will be usefully open.
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echelon • yesterday at 6:12 PM
And since China has such a lead, you'll be using their implementations.
That's why this is geopolitical.
The DoD and Five Eyes prefer ARM, where the US maintains a strong lead.
There are also many high-performance Chinese implementations that are open-source (e.g., XuanTie C910, XiangShan, etc.).
While achieving an open-core design comparable to Zen 5 is unlikely in the near term, a sustained open-source collaborative effort could, in the long run, significantly change the situation. For example, current versions of XiangShan are targeting ~20 SPECint 2006/GHz (early where at ~9).