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Re:Welcome Debian riscv64 by erik_seaberg on Monday July 24, 2023 @12:38AM (#36843158)
https://news.ycombinator.com/item?id=18542040 talks about registers with a similar purpose.
Re:Welcome Debian riscv64 by sanxiyn on Monday July 24, 2023 @12:42AM (#36843186)
Only in EL1, which means you can only use them in kernel.