[RFC PATCH 0/8] Introduce logical CPU mapping

[Will Deacon]

On Wed, Aug 10, 2011 at 09:50:08AM +0100, Santosh wrote:
> Will,

Hi Santosh,

> On Wednesday 10 August 2011 03:12 AM, Will Deacon wrote:
> > Hello,
> >
> > This patch series is an RFC following a discussion I had with Russell
> > the other day:
> >
> >   http://lists.infradead.org/pipermail/linux-arm-kernel/2011-August/060370.html
> >
> > The approach I've taken is fairly simple but is enough for booting on a
> > CPU with physical ID != 0 on platforms which can handle it.
> >
> > Note that I haven't touched the OMAP4 or Tegra platforms since it's not
> > clear from the code how they would be adapted to make use of the
> > physical CPU number.
> >
> On OMAP, we use hardware register hand-shake for boot between a boot CPU
> and non-boot CPU. On OMAP4, boot CPU has to be always CPU0 to ensure
> that security and firewall initialisation is taken care. Other CPU can't
> do those things.

Understood. We can leave OMAP like it is then and assume that bootloaders
will always ensure physical CPU0 is used for booting.

Cheers,

Will