> Have you booted another board with your arm64 kernel, > rpi4 or zero 2w for example?
No, the pi5 has other architectural differences from earlier pi boards, so a pi5 kernel won't just boot on a pi4. A 64-bit pi4 kernel would take some more work. > I supposed your extra work for 32-bit compatibility is for running go on this > board. No, in fact I did the 32-bit user space version first, so I could test the new kernel during development using existing arm32 commands and fileserver code on a shared server. The extra work was later, to add the ability to execute 64-bit user programs. I did that mainly to give the arm64 toolchain some more exercise. I don't have any applications which require a big address space. Maybe the extra registers (and DIV/MOD instructions!) of arm64 would give some performance advantage: it would be interesting to benchmark 32- and 64-bit builds of the same command and see. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T7db02c9c4602d6f1-M833ed74784fee79b0cad0f1b Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
