[RFC] PSCI: Use DT Function ID values only for old versions of spec

[Mark Rutland]

On Thu, Mar 20, 2014 at 02:03:22AM +0000, Ashwin Chaugule wrote:
> Hi Mark,
> 
> > On 14 March 2014 05:52, Mark Rutland <mark.rutland at arm.com> wrote:
> >>
> >> > +     psci_function_id[PSCI_FN_MIGRATE] = PSCI_ID_CPU_MIGRATE;
> >> > +     psci_ops.migrate = psci_migrate;
> >>
> >> It would also be a good idea to hook up AFFINITY_INFO to a cpu_kill
> >> callback from the start, to ensure implementors bother to implement it,
> >> and such that we can make kexec safe(r).
> >>
> >> If we rely on it from the start it's more likely that it will actually
> >> get implemented, and it will highlight any dodgy PSCI 0.2
> >> implementations while there's a chance they can be fixed.
> >>
> >
> 
> Although I sent v1 of this patch, I haven't forgotten about this part.
> Had a go at it, but it turned out quite messy for ARM32. I was trying
> to get cpu_kill via smp_ops.

I'm not sure I follow. Do you have an example patch or tree that would
highlight the difficulty?

> I'll revisit this again hopefully tomorrow and see if there's anything better.

Good to hear!

Cheers,
Mark.