Hi,

 

I managed to compile a working 4.6.2 Linux kernel for my Allwinner H3 powered Orange Pi PC using the Armbian lib build scripts.

 

But where I'm completely stuck is when it comes to get all four CPU cores up and running.

lscpu shows only cpu0 as online, and a syfs entry to enable cores 1..3 does not exist.

 

Having applied  20151223-h3-mainline-smp-hack patch, cpu1..3 seem to get set online, but the booting process stalls (rcu_preempt self-detected stall on CPU, etc.).

http://linux-sunxi.org/Linux_mainlining_effort#Status_Matrixmarked SMP as "done", and mentioned this patch.

 

A log file of the failed boot process is attached.

 

My setup:

• Linux Kernel 4.6.2 with patches from megous @ GitHub.
• U-Boot 2016.07-rc3
• arm-linux-gnueabihf-gcc 6.1.1 (gcc-5 didn't work with the current U-Boot due to a bug)

screenlog.0.txt

I just happened to come across a solution for this yesterday... it's a u-boot problem.. It can be fixed with an environment variable.

 

see this post

 

http://forum.armbian.com/index.php/topic/1180-orange-pi-lite-now-available/?p=12165

Thank you very much for this hint!!!

 

Seemed like this was the problem.

Edited July 7, 201610 yr by soenke