[Skiboot] [RFC PATCH 2/2] powerpc/powernv: implement NMI IPIs with OPAL_SIGNAL_SYSTEM_RESET

Benjamin Herrenschmidt benh at kernel.crashing.org
Thu Sep 14 12:24:49 AEST 2017

On Wed, 2017-09-13 at 23:13 +1000, Nicholas Piggin wrote:
> On Wed, 13 Sep 2017 02:05:53 +1000
> Nicholas Piggin <npiggin at gmail.com> wrote:
> > There are two complications. The first is that sreset from stop states
> > come in with SRR1 set to do a powersave wakeup, with an sreset reason
> > encoded.
> > 
> > The second is that threads on the same core can't be signalled directly
> > so we must designate a bounce CPU to reflect the IPI back.
> Here is an updated Linux patch for the latest OPAL patch. This has
> a few assorted fixes as well to make it work nicely, I roll them into
> one patch here to make it easy to apply for testing the OPAL patch.

Why can't you sreset threads of the same core on P9 ?


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