Xen devel - Mar 2009 - [XenARM] Weird initialization in PPC port

Hi all,

In the context of our port on ARM (EmbeddedXEN project),I''m using an
initial port from MontaVista which is based upon the PPC port.
 I''ve notice a strange statement in the file arch/ppc/setup.c
(initialization time).

Right after the creation of the domain 0, there is the following line:

dom0->vcpu[0]->cpu_affinity = cpumask_of_cpu(0);

But the vcpu pointer is initialized in the construct_domain0() function which is
called afterwards.

Therefore, the vcpu field is still NULL and leads to an oops.

I''ve noticed that doing the port on ARM, but I wasn''t able to
test that on a ppc architecture.

I''m using xen 3.1.3 (I''ve noticed that the PPC port has
disappeared in 3.3.x)

Please could you explain me how it can work?? (I''ve checked the code
for PPC , and I was not able to find a different behavior).

Thanks in advance

Daniel





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On 27/03/2009 16:19, "ROSSIER Daniel"
<Daniel.Rossier@heig-vd.ch> wrote:
> I''ve noticed that doing the port on ARM, but I wasn''t
able to test that on a
> ppc architecture.
>  
> I''m using xen 3.1.3 (I''ve noticed that the PPC port has
disappeared in 3.3.x)
>  
> Please could you explain me how it can work?? (I''ve checked the
code for PPC ,
> and I was not able to find a different behavior).
The PPC port is dead (indeed has been deleted from the tree for some time)
so it¹s unlikely anyone will be able to help you. Perhaps the arch/ppc code
you are looking at is simply broken?

 -- Keir



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> -----Original Message-----
> From: Keir Fraser [mailto:keir.fraser@eu.citrix.com]
> Sent: vendredi, 27. mars 2009 17:37
> To: ROSSIER Daniel; xen-devel@lists.xensource.com; xen-
> arm@lists.xensource.com
> Subject: Re: [Xen-devel] Weird initialization in PPC port
> 
> On 27/03/2009 16:19, "ROSSIER Daniel"
<Daniel.Rossier@heig-vd.ch>
> wrote:
> 
> > I''ve noticed that doing the port on ARM, but I
wasn''t able to test
> that on a
> > ppc architecture.
> >
> > I''m using xen 3.1.3 (I''ve noticed that the PPC port
has disappeared
> in 3.3.x)
> >
> > Please could you explain me how it can work?? (I''ve checked
the code
> for PPC ,
> > and I was not able to find a different behavior).
> 
> The PPC port is dead (indeed has been deleted from the tree for some
> time)
> so it¹s unlikely anyone will be able to help you. Perhaps the arch/ppc
> code
> you are looking at is simply broken?
Ok, thanks. I suspect that the code never worked ;-)
> 
>  -- Keir
> 

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