https://blog.wongcw.com/2020/08/09/linux-5-9-%e5%90%88%e4%bd%b5%e7%aa%97%e5%8f%a3%e7%9a%84%e4%b8%80%e4%ba%9brisc-v-%e8%bb%9f%e4%bb%b6%e5%8a%9f%e8%83%bd%e6%94%af%e6%8c%81/
Linux 5.9 合併窗口的一些RISC-V 軟件功能支持