[PATCH] fsl/smp: add low power boot support to replace spin boot

[York Sun]

On 01/14/2015 10:05 PM, Dongsheng Wang wrote:
> From: Wang Dongsheng <dongsheng.wang at freescale.com>
> 
> U-boot put non-boot cpus into an low power state(PW10/PW20 or DOZE) when cpu
> powered up. To exit low power state kernel will send DOORBELL or MPIC-IPI
> signal to all those CPUs.
> 
> e500/e500v2 use mpic to send IPI signal.
> e500mc and later use doorbell to send IPI signal.
> 
> This feature tested on:
> POWER UP TEST:
> P1022DS(e500v2),96k times.
> P4080(e500mc),  110k times.
> T1024(e5500),   83k times.
> T4240(e6500),   150k times.
> 
> CPU HOTPLUG TEST:
> P1022DS(e500v2),1.4 million times.
> P4080(e500mc),  1.8 million times.
> T1024(e5500),   1.3 million times.
> T4240(e6500),   1.1 million times.
> 
> Signed-off-by: Wang Dongsheng <dongsheng.wang at freescale.com>
> 

This is a very good move. Can you explain what has been tested for 100K times,
or over a million times?

Have you verified on older e500v2 platforms, such as MPC8572?

York