[PATCH v2 3/3] ppc64: Add a flag to tell the kernel it's booting from kexec

[Simon Horman]

On Tue, Oct 06, 2015 at 05:55:50PM -0500, Scott Wood wrote:
> It needs to know this because the SMP release mechanism for Freescale
> book3e is different from when booting with normal hardware.  In theory
> we could simulate the normal spin table mechanism, but not (easily) at
> the addresses U-Boot put in the device tree -- so there'd need to be
> even more communication between the kernel and kexec to set that up.
> 
> Signed-off-by: Scott Wood <scottwood at freescale.com>
> ---
> v2: Use a device tree property rather than setting a flag in the kernel
> image, as requested by Michael Ellerman.

I'd value a review of this from someone more familiar with ppc than I.