[HN Gopher] Ubuntu 25.10 Raises RISC-V Profile Requirements
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       Ubuntu 25.10 Raises RISC-V Profile Requirements
        
       Author : bundie
       Score  : 37 points
       Date   : 2025-07-01 08:32 UTC (2 days ago)
        
 (HTM) web link (www.omgubuntu.co.uk)
 (TXT) w3m dump (www.omgubuntu.co.uk)
        
       | fithisux wrote:
       | Still, no consumer based RV23 mini-ITX or micro-ATX or ATX form
       | factor devices.
       | 
       | And Orange PI 2 has a GFX blob issue.
        
         | ojn wrote:
         | It's worse than that -- there is not a single piece of hardware
         | that implements RVA23 available to be bought on the market
         | today.
         | 
         | There are SoCs on the market that implement RVV (Vector
         | extensions), and SoCs on the market that implement H
         | (Hypervisor extensions).
         | 
         | There are no SoCs on the market that implement both at the same
         | time. And both are _mandatory_ for RVA23.
         | 
         | I'd love to be proven wrong on the hardware availability. If
         | there's hardware to be bought in western countries that
         | implements both RVV and H, please let me know.
        
       | somanyphotons wrote:
       | RVA23 is actually a decent ISA for linux machines for the long
       | term, RVA20 was not.
       | 
       | Presumably there's going to be some hardware releases later this
       | year that Ubuntu has early knowledge of.
       | 
       | Does this line up with what riscv android will also require?
        
       | csense wrote:
       | Can you write a kernel patch / driver to trap the unsupported
       | instructions and provide software implementations?
        
         | karlgkk wrote:
         | Rva20 lacks vector support and hypervisor instructions, among
         | other things.
         | 
         | You're welcome to put a ton of effort in for dogshit
         | performance on a bunch or $35 SBCs but the rest of us will just
         | upgrade
         | 
         | And don't worry, some vendor won't come in and magically save
         | you - fedora is eyeing rv22 as their baseline.
        
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       (page generated 2025-07-03 23:00 UTC)