Giving you some additional options...
You may try "git rebase linux-3.14 (mainline)".
Or, you may try to rebase your 3.4 Odroid XU kernel on the Tizen.org's linux-3.10's tizen branch. (or merge/meld odroid XU drivers onto linux-3.10 of tizen.org, which supports Odroid X2/U3)
Or, you may try to reuse (merge) linux-3.4.git in tizen.org
Cheers,
MyungJoo.
------- Original Message -------
Sender : Heecheol, Yang<[email protected]>
Date : 2014-09-16 17:09 (GMT+09:00)
Title : [Dev] Unfortunate things about Odroid XU support.
Hello,
I am personally trying to port Tizen on my odroidXU board which has Exynos 5410 SoC.
Struggling for about 3 months, I concluded that it is almost impossible now due to several reasons below, and I am considering to give up porting work.
However, I thought that I’d better to share my experiences before I really decide to give up. So, I am writing this mail to share what I have suffered from.
First of all, I want to mention that the stable Linux kernel version which OdroidXU supports is 3.4. It is the first barrier that makes me impossible to port.
As you know, Tizen’s security framework is based on underlying SMACK in kernel. However, kernel 3.4 doesn’t have adequate version of SMACK.
To be specific, when I booted Tizen on that kernel version, booting failed because systemd failed to access load2 interface in smackfs.
Actually, LOAD2 interface is supported from kernel >= 3.10. When I realized the fact, I tried to find higher kernel version that supports Odroid XU.
Fortunately, I found 3.13 and 3.14 kernel version from link below.
https://github.com/hardkernel/linux/tree/odroid-3.13.y-linaro
It was experimental and non-stable version and It was originally intended to support Ubuntu. Of course, It works well when I booted this version with Ubuntu.
However, when I tried to boot the kernel with Tizen rootfs, the booting stopped printing ‘imprecise external abort’. The error is very similar to the link below.
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-November/214882.html
At first, I thought that the error may be related to the Tizen, not kernel. However I changed my thought, and implicitly concluded that it may be related to kernel. But not exactly.
Anyway, whatever the error is related to, it was so hard to debug for me.
In summary
1. Stable Odroid XU kernel version(3.4) can’t support Tizen due to old SMACK version.
2. The experimental version of recent kernel version has a bug difficult to solve.
These are what I experienced and followings are what I think have to do if I would continue porting work.
1. Backport up-to-date version of SMACK into the stable kernel 3.4 or
2. Solve the problems in kernel 3.13
Yes, they are possible to do but as a premature person, it is very difficult for me to do alone. I have no debugging hardware tools, not enough knowledge, and so on. This is the most important reason: I am premature.
So I want to conclude my mail by saying thanks to many people who helped in various ways.
In someday, I wish to port Tizen on my board.
Regards,
Hee-cheol, Yang.
--
MyungJoo Ham (함명주), PHD
Samsung Electronics
Cell: +82-10-6714-2858
|
|
_______________________________________________ Dev mailing list [email protected] https://lists.tizen.org/listinfo/dev
