PortingDoc.txt

SDK:    (Install Git LFS)
git@github.com:Cavium-Open-Source-Distributions/OCTEON-SDK.git
9f1cd06fd731848a044048f075242d72ad456d03

Env setup:
set OCTEON_ROOT
source ./env-setup OCTEON_CN78XX

Build Kernel && initramfs:
cd linux && make kernel


cs4321 kernel Load issue
drivers/of/of_mdio.c : Patch of_mdiobus_child_is_phy
if (of_device_is_compatible(child, "cortina,cs4318"))
    return true;


KVM patch:
https://elixir.bootlin.com/linux/latest/source/arch/mips/kvm/emulate.c#L1842
kernel/linux/virt/kvm/Kconfig - default y

Initramfs Patch:
embedded_rootfs/storage/busybox.config - enable CONFIG_SWITCH_ROOT=y
embedded_rootfs/etc-files/inittab -    ::respawn:exec /bin/sh

patch busybox/init/init.c
```
*** init.c	2019-08-29 19:07:46.665398888 +0000
--- init.c_bak	2019-08-29 18:41:49.614695123 +0000
*************** static pid_t run(const struct init_actio
*** 479,499 ****
  
  	/* Careful: don't be affected by a signal in vforked child */
  	sigprocmask_allsigs(SIG_BLOCK);
-     if (strlen(a->command) > 4
-        && a->command[0] == 'e'
-        && a->command[1] == 'x'
-        && a->command[2] == 'e'
-        && a->command[3] == 'c'
-        && a->command[4] == ' '
-        ) {
- 	    init_exec(&a->command[5]);
-         pid = -1;
-     } else {
  	if (BB_MMU && (a->action_type & ASKFIRST))
  		pid = fork();
  	else
  		pid = vfork();
-     }
  	if (pid < 0)
  		message(L_LOG | L_CONSOLE, "can't fork");
  	if (pid) {
--- 479,488 ----
```


Boot to Debian: debian-octeon_jessie.tgz
patch etc/inittab -   exchange /etc/init.d/rcS (sysinit->wait) and /sbin/sulogin (wait->sysinit)
regenerate ssh host key - rm -v /etc/ssh/ssh_host_*;dpkg-reconfigure openssh-server