Documentation For Writing a Split Driver

Documentation For Writing a Split Driver

[Ryan Riley]

I've spent the last few weeks digging around in Xen code and old 
documentation to produce my own simple split driver for 3.0.4-2 to 
handle some logging stuff that I'm doing.  In the process, I quickly 
discovered that the Wiki documentation for adding a new driver to Xen is 
a little lacking.  Is there any interest in me documenting any/all of 
the following and contributing it?
-Creating a backend/frontend skeleton driver and adding it to the kernel.
-Modifying xend and xm to initialize the XenStore for it.  (and hence 
get the probe functions to be called)
-Setting up event channels
-Setting up a ring buffer
-Sharing memory pages between domains (basically the grant tables)

Thanks
Ryan

RE: Documentation For Writing a Split Driver

[Ian Pratt]

> I've spent the last few weeks digging around in Xen code and old
> documentation to produce my own simple split driver for 3.0.4-2 to
> handle some logging stuff that I'm doing.  In the process, I quickly
> discovered that the Wiki documentation for adding a new driver to Xen
is
> a little lacking.  Is there any interest in me documenting any/all of
> the following and contributing it?
> -Creating a backend/frontend skeleton driver and adding it to the
kernel.
> -Modifying xend and xm to initialize the XenStore for it.  (and hence
> get the probe functions to be called)
> -Setting up event channels
> -Setting up a ring buffer
> -Sharing memory pages between domains (basically the grant tables)

"yes please" to all of the above!
Thanks,
Ian

RE: Documentation For Writing a Split Driver

[Thomas Friebel]

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> > Is there any interest in me documenting any/all of
> > the following and contributing it?

> "yes please" to all of the above!
> Thanks,
> Ian

*metoo*
Very interested in that topic.

Thomas

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Re: Documentation For Writing a Split Driver

[Mark Williamson]

> I've spent the last few weeks digging around in Xen code and old
> documentation to produce my own simple split driver for 3.0.4-2 to
> handle some logging stuff that I'm doing.  In the process, I quickly
> discovered that the Wiki documentation for adding a new driver to Xen is
> a little lacking.  Is there any interest in me documenting any/all of
> the following and contributing it?

Absolutely!!!!!

> -Creating a backend/frontend skeleton driver and adding it to the kernel.

Yep.  I remember there being a skeleton example driver floating around on the 
list at some point, but APIs may have changed since then I guess.

> -Modifying xend and xm to initialize the XenStore for it.  (and hence
> get the probe functions to be called)

Yep.  This is actually not that complicated, but it'd be nice to have it 
documented.

> -Setting up event channels
> -Setting up a ring buffer
> -Sharing memory pages between domains (basically the grant tables)

All good stuff.

You might also like to take a look at the stuff covered in the interface 
manual (it's in the source tree) and see if there's any overlap with what 
you're writing - it would be nice to avoid duplicating information in 
multiple places, so that it won't get out of sync later.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!