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To: Nicholas Piggin <npiggin@gmail.com>, linuxppc-dev@lists.ozlabs.org
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [v2,
 3/3] powerpc/powernv: Avoid waiting for secondary hold spinloop with
 OPAL
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Date: Tue, 14 Nov 2017 22:12:08 +1100 (AEDT)
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On Mon, 2017-10-23 at 08:05:07 UTC, Nicholas Piggin wrote:
> OPAL boot does not insert secondaries at 0x60 to wait at the secondary
> hold spinloop. Instead they are started later, and inserted at
> generic_secondary_smp_init(), which is after the secondary hold
> spinloop.
> 
> Avoid waiting on this spinloop when booting with OPAL firmware. This
> wait always times out that case.
> 
> This saves 100ms boot time on powernv, and 10s of seconds of real time
> when booting on the simulator in SMP.
> 
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/339a3293f4e493a6c40f71e4faab0c

cheers