[Bug 2018558] [NEW] T-HEAD C906 PMU on Allwinner Nezha Board installed Ubuntu Server preinstalled image 23.04 do not fully work.

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when testing hackbench by using perf tool based on hardware performance
events(cpu cycles) on Allwinner Nezha Board installed  Ubuntu Server
preinstalled image 23.04  ,  i found that there was no samples.The
results are below.

ubuntu at ubuntu:~$ sudo perf record -e cpu-cycles -F 1499 -g ./hackbench
sudo perf report --no-children -G > riscv hackbench.txtRunning in process mode with 10 groups using 40 file descriptors each (= 400 tasksEach sender will pass 100 messages of 100 bytesTime: 17.347
perf record: Woken up 1 times to write data perf record: Captured and wrote 0.043 MB perf.data Error:
The perf.data data has no samples!

The reason why there was no samples is that there is still  OpenSBI 1.1
on  Ubuntu Server preinstalled image 23.04. you can refer to  the link :
https://patchwork.ozlabs.org/project/opensbi/cover/20221004164227.1381825-1-heiko@sntech.de/

can you help to fix this bug in the newest ubuntu images by updating
OpenSBI version for RISC-V architecture.

yours sincerely!

** Affects: opensbi (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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T-HEAD C906 PMU on Allwinner Nezha Board installed Ubuntu Server preinstalled image 23.04 do not fully work.
https://bugs.launchpad.net/bugs/2018558
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