Re: [XenPPC] [PATCH] default link address

[Amos Waterland <apw@xxxxxxxxxx>]

On Fri, Jun 16, 2006 at 04:45:19PM -0400, Michal Ostrowski wrote:
> Perhaps we should, like Linux does, run early code to interface with FW
> in a relocatable manner (perhaps even as a separately linked program)
> and once we kill FW then we locate the HV code at any place we want.
> 
> Moving link addresses to accommodate a particular FW version means that
> we may end up clashing with another instance of FW.
> 
> Such early FW-interface code would produce a Linux compatible DTC; and
> Xen itself should only depend on that.  This will allow Xen to run on
> any platform that supports Linux -- and note that platforms may support
> Linux not by providing an actual OF instance, but rather by providing a
> a DTC blob.
> 
> This would also allow us to play nice with kexec, which as a bonus would
> allow for a scenario where we boot a Linux to do initial system set-up
> and then kexec into Xen.   

This might be something we want to get involved in.  Check out the kboot
project, they have a paper here and are presenting at OLS:

 http://kboot.sourceforge.net/

Note that K42 will just work with kboot when/if it supports PPC64, it
wasn't that hard to do.  I think it would save Xen a lot of maintenence
work down the road.


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