Re: [Xen-devel] Re: pv_ops dom0 USB fixed

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ian Campbell wrote:
> On Wed, 2008-12-17 at 11:26 -0800, Jeremy Fitzhardinge wrote:
>   
> > > Also noticed the dom0 builder doesn't (yet) boot bzImages, right?
> > >   
> > >       
> > Yeah.  It's on the todo list, but I don't think anyone's lined up to
> > do it yet.  Shouldn't be more than a couple of hours work for someone
> > with some expertise in the area (hint hint).
> >     
> The main stumbling block is the lack of any existing decompression code
> in the hypervisor. I've got half a patch somewhere which uses Linux's
> inflate.c (it should be in an init section so it's thrown away after
> boot) but it's not complete, it was a while ago so I don't even recall
> how not-complete it was. I can dig it out if someone wants to pick it up
> before I get back round to it.
>   
Ah, right, it was relying on grub to do all the decompression?

> An alternative option might be a multiboot shim which picks apart any
> bzImage format modules in its input and passes the result down the chain
> to the next module. e.g. your grub entry might look like:
>         title bz-xen
>                 kernel unbzimage
>                 module xen.gz dom0_mem=foo
>                 module vmlinuz root=blah
>                 module initrd
>   
That might be useful to have, but I don't think it would be easier to 
implement.
   J

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