linux-kernel - Re: [RESEND PATCH] ARM: EXYNOS: Fix the sequence of secondary CPU boot for Exynos3250

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Date:	Wed, 11 Jun 2014 01:35:27 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>, linux@....linux.org.uk,
	kgene.kim@...sung.com, t.figa@...sung.com
CC:	kyungmin.park@...sung.com, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] ARM: EXYNOS: Fix the sequence of secondary CPU
 boot for Exynos3250

Hi Chanwoo,

On 11.06.2014 01:27, Chanwoo Choi wrote:
> This patch set AUTOWAKEUP_EN bit to ARM_CORE_CONFIGURATION register
> because Exynos3250 removes WFE in secure mode so that turn on automatically
> after setting CORE_LOCAL_PWR_EN. Also, This patch use dbs_sev() macro
> to guarantee the data synchronization of command instead of IPI_WAKEUP
> because Exynos3250 don't have WFE mode in secue mode.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  arch/arm/mach-exynos/platsmp.c  | 9 ++++++++-
>  arch/arm/mach-exynos/pm.c       | 8 ++++++--
>  arch/arm/mach-exynos/regs-pmu.h | 4 ++++
>  3 files changed, 18 insertions(+), 3 deletions(-)
> 

This patch seems to be unneeded with Krzysztof's patch send a while ago
[1]. As reported by Krzysztof, that patch apparently fixes SMP support
on Exynos3250 and is much smaller and less invasive.

[1] - http://thread.gmane.org/gmane.linux.kernel.samsung-soc/32809

Best regards,
Tomasz
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