[PATCH 0/3] ARM: Meson6: enable SMP

[maxime.ripard@free-electrons.com (Maxime Ripard)]

Hi Arnd,

On Thu, Oct 02, 2014 at 04:44:20PM +0200, Arnd Bergmann wrote:
> On Tuesday 30 September 2014 22:45:38 Carlo Caione wrote:
> > On mar, set 30, 2014 at 12:22:21 +0200, Arnd Bergmann wrote:
> > > On Tuesday 30 September 2014 10:46:46 Carlo Caione wrote:
> > > > On mar, set 30, 2014 at 10:43:52 +0200, Carlo Caione wrote:
> > > > > Amlogic Meson6 is a dual-core Cortex-A9. This patchset adds all the necessary
> > > > > pieces to boot the secondary CPU.
> > > > 
> > > > Sorry for the double sending.
> > > > Forgot to CC LAKML.
> > > 
> > > Looks good to me in principle, but I wonder about the CPU enable method.
> > > Are you able to implement PSCI in u-boot like it was done for allwinner?
> > > 
> > > This is mostly a question of whether the system comes up in secure mode
> > > or non-secure mode.
> > 
> > I would be able if I had the u-boot source code or the possibility to
> > flash the board I'm using. Unfortunately at this moment I don't have
> > either. Probably in the near future I'll be able to implement PSCI in
> > u-boot since Amlogic is kindly starting to provide documentation but now
> > this is the best I can do.
> 
> Ok, I see. Let's give Amlogic some more time then. I think it's better
> to merge other parts of the platform first when we can reasonably assume
> that we don't have to change the binding any more.
> 
> It would be a shame to merge this now and then make it obsolete by
> implementing PSCI but still having to carry around the original code
> for compatibility reasons.

More likely, PSCI is not going to be supported by the bootloaders of
the devices already in the wild, so we still have to provide them an
option. And even when it will, you'll still have to support both the
devices with the old bootloaders, and the one with the new.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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