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Date: Wed, 26 Aug 2009 00:09:36 +0800
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Subject: Re:[PATCH 1/2] powerpc: add kexec support on FSL-Book-E
From: "wilbur.chan" <wilbur512@gmail.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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2009/8/5, Sebastian Andrzej Siewior <bigeasy@linutronix.de>:

> There is no SMP support. The other CPUs are not halted/resumed. At the
> time of writing it I did not have a SMP machine so I did not implement
> it.
> Sebastian
>
Hi  Sebastian,

Recently I've implemented  non-SMP kexec on MPC8572 and P2020ds(2G ram).



I modified your

misc_32.S that , I setuped  two '1G' entries  after the "rfi"
instruction, so that I did

not  need to setup  mapping for instruction address.

As for SMP supporting,I tried to close one of the CPUs in
default_machine_kexec,

and found that , when cpu1  closed  ,and if the second kernel is NON-

SMP,everything went well.so I added some code in

kexec-tools, to make sure the 'kexec' process was running on CPU 0.


So, there left one problem, I can not start the second SMP-kernel,
even if I  closed

CPU1.  Any suggestions?


PTW:

no-smp ---> no-smp.........OK
no-smp --->smp...............OK

smp(with cpu1 closed)---->no-smp..............OK
smpw(with cpu1 closed)---->smp ................FAILED


regards,

wilbur