[PATCH 1/7] PowerPC64: Not to insert EA=0 entry at

Ishizaki Kou kou.ishizaki at toshiba.co.jp
Thu Sep 27 21:22:07 EST 2007


> On Thu, 2007-09-27 at 17:01 +0900, kou.ishizaki at toshiba.co.jp wrote:
> > Celleb does not set get_paca()->kstack properly (I don't know which
> > function should set it up), so we need to workaround.
> paca->kstack is set in asm (via the PACAKSAVE macro), from either
> __secondary_start for non-boot CPUs or from start_here_common for the
> boot CPU.
> slb_flush_and_rebolt() should not be called before that happens.
> How do you end up with kstack set to 0 ?

I found r13 is not set before entering start_here_common for boot cpu.
For non-boot threads, __secondary_start will set r13 properly.

So the problem is to set r13 correct PACA address before entering
start_here_common. Should it set before entering kernel or will some
patch make sense?

Best regards,
Kou Ishizaki

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