[Xen-devel] When does domain builder allocate/bound DomU's XenStore port?

[Wei LIU <liuw@xxxxxxxxx>]

Hi, Xen experts

As I discover in Mini-OS, the XenStore port is allocated by Dom0's
domain builder. All that a DomU has to do is binding that port in
shared_info page to its handler, and everything works. So I'm quite
interested in how the domain builder in Dom0 allocates a XenStore port
for DomU.

In the book The Definitive Guide to The Xen Hypervisor, it says that
XenStore event channel is bound by domain builder at build time. I
looked around for related code, but the code base seems to be too
large - both userland and kernel space. I've tried looking at
"tools/python" as well as "tools/libxc", but I didn't get the point.
So, what's the procedure and, which piece of code should I pay
attention to?

Thanks in advanced!

P.S. we use Xen 3.3.0 stable code.

Wei Liu
2010-03-02

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