Xen devel - Aug 2007 - Howto embed Network Driver from Linux source tree into xen-hypervisor!

Hi every one!

This is my problem:

1. For enabling to xen-hypervisors from different computers, to
communicate from Ethernet (Without the help from other rings on top of
it), I think I need integrate a network driver into xen itself. (IS
THIS THE CORRECT SOLUTION?)

2. For that purpose I choosed to use e1000 driver from Linux''s source
tree. (CAN SOME ONE GET ME DIRECTIONS FOR DOING THIS!)

-- 
Best Regards
Rezaie

Iran University of Science and Technology
Department of Computer Science & Engineering
System Software Group

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> 1. For enabling to xen-hypervisors from different computers, to
> communicate from Ethernet (Without the help from other rings on top of
> it), I think I need integrate a network driver into xen itself. (IS
> THIS THE CORRECT SOLUTION?)
Xen used to have ethernet drivers built into the hypervisor itself in the 1.x 
series, but this got dropped since the Xen 2 release.  I''d have thought
it''d
be somewhat undesirable to try to put this back in there...  Especially since 
a load of the PCI code has moved to dom0 as well now.

What are you actually trying to achieve?  Are you sure you can''t do
this from
dom0?  e.g. run a daemon in each dom0 communicating with Xen by hypercalls or 
ring buffers, and then use normal Linux networking?  I''d have thought
that''d
be a cleaner solution too.

Of course, what is best does rather depend on what you''re trying to do
;-)
> 2. For that purpose I choosed to use e1000 driver from Linux''s
source
> tree. (CAN SOME ONE GET ME DIRECTIONS FOR DOING THIS!)
You could take a look at some of the older releases of Xen to see how PCI and 
network code used to be part of the hypervisor.  I''d recommend avoiding
doing
that though!

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!

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Thank you Mark,

I will watch that 1.x series.

I asked my question because "I am trying to build Virtual NUMA Machine
with xen on top of some x86 pcs, in this distributed Single system
image machine only kernel (Linux) itself needs to have NUMA scheduler
and I need only provide that image" (as you can find in VNUMA project
but it was only on itanium and not using xen). For this, I need really
low latency network driver and I thought it''s best to not add overhead
of switching between rings.

I am really thankful if some one help me how can I decide how to do
this decision.

best regards
rezaie

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