Re: [Xen-devel] [PATCH v9 03/13] x86: maintain COS to CBM mapping for each socket

[Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>]

On Mon, Jun 15, 2015 at 05:02:59PM +0100, Jan Beulich wrote:
> >>> On 03.06.15 at 06:53, <chao.p.peng@xxxxxxxxxxxxxxx> wrote:
> > @@ -209,6 +215,23 @@ void psr_ctxt_switch_to(struct domain *d)
> >      }
> >  }
> >  
> > +static int cat_cpu_prepare(unsigned int cpu)
> > +{
> > +    struct psr_cat_socket_info *info;
> > +
> > +    if ( !cat_socket_info )
> > +        return 0;
> > +
> > +    info = cat_socket_info + cpu_to_socket(cpu);
> 
> Is cpu_to_socket() guaranteed to always return a value < nr_sockets?

Return âENOSPC once this happen?

Chao

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