[okl4-developer] Different questions about OKL4

[Alexander Valitov]

Hello All,

I’m completely new to OKL4. There is strong possibility that I will start
development with OKL4. It may be porting of virtual machines from one
hypervisor to OKL4 or development from scratch. I’ve read all available
documentation and managed to built and ran OKLinux for versatile platform on
QEMU. But still have a bunch of questions. Some of them might be stupid that
is because my knowledge of OKL4 is quite poor. It is really appreciated if
you would give me answer for any of them.

Regarding Elfweaver:

1. Recently I’ve read Elfweaver reference manual
(elfweaver-ref-manual-3.0.pdf), but I still have a lot of blind spots about
Elfweaver. Are there any documents or guides which explain main concepts and
give some rationales? Or tutorial for Elfweaver script from simple
application (e.g. single cell) to really complicated (e.g. several OKLinux
instances with separate OKL4lib cell and native L4 cell)?

Iguana vs OKL4lib:

2. OKL4lib manual (okl4lib-ref-manual-3.0.pdf) says: “OKL4 Library is
intended to be a complete replacement of Iguana and other root servers”.
Does it mean that we could consider Iguana as out-of-date module and it is
wise not to spend time becoming familiar with the Iguana? Are you going to
remove the Iguana in future releases? Is the OKL4lib going to become a sort
of default OS personality for OKL4 L4 kernel?

Build system options/description:

3. Unfortunately I’m not familiar with SCons build system and even with
Python itself. That is why your building system looks really tricky for me.
Also build options description given at 
http://wiki.ok-labs.com/BuildingAndSimulating wiki   seems to be out of
date. Is there any document which describes available build system options
and gives some instructions how to use build system?

OKL4 Driver Framework:

4. There is OKL4 Driver Framework description on 
http://wiki.ok-labs.com/DriverFramework Wiki  . What is it intended for? Is
it intended to be used conjointly with Iguana or it could be used with
OKL4lib or maybe with OKLinux also?

Regarding OKLinux:

5. Are there any documents which describe OK Linux architecture, changes
that was made to Linux kernel to get para-virtualized one, tunneling of
Linux system calls into L4 system calls and so on?

6. As I understood OKLinux is Iguana application. Is it possible to get
OKLinux running on top of OKL4lib?

OKLinux drivers:

7. What kind of drivers is used by OKLinux? Are they virtualized in some way
and are able to be used by several instances of OKLinux?

8. Is it possible to use additional native Linux drivers/modules without
modification of OKLinux and driver/module itself (Compiling-in into Linux
kernel or using insmod)?

Native L4 drivers:

9. Are there any available drivers which work on top of native OKL4 API or
on top of Iguana/OKL4lib API? I am especially interested in TCP/IP stack
implementation and virtual switch (interface acting in promiscuous mode
muxing/demuxing packets to/from several cells where each cell has its own
virtual network adapter).

Linux device driver environment:

10. Do you have kind of Linux device driver environment which makes able to
run native Linux drivers without OK Linux?

POSIX coverage:

11. I think pthread is great effort. But unfortunately it is not enough for
porting POSIX application. Do you have any plans for implementation of at
least Minimal Realtime System Profile AKA PSE51? Any approximate date?

Best Regards,
	Alexander Valitov

-- 
View this message in context: http://n2.nabble.com/Different-questions-about-OKL4-tp2197122p2197122.html
Sent from the OKL4 Community Forum mailing list archive at Nabble.com.