From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 3/5] ARM: soft_restart: disable the outer L2 when the last CPU is going down
Date: Wed, 16 Nov 2011 13:59:40 -0800 [thread overview]
Message-ID: <4EC4324C.3000300@codeaurora.org> (raw)
In-Reply-To: <20111116183036.GR4942@mudshark.cambridge.arm.com>
On 11/16/11 10:30, Will Deacon wrote:
> Hi Stephen,
>
> On Wed, Nov 16, 2011 at 06:20:08PM +0000, Stephen Boyd wrote:
>> When does this code execute on another cpu? My understanding is that
>> soft_restart() is only called on one CPU so I would think checking the
>> number of online cpus isn't necessary.
> Currently, yes, this only executes on one CPU. The code is there in case
> we want to implement a SMP kexec solution that doesn't require CPU hotplug
> at some point.
>
> I suppose you could end up in a situation where the reset path leads to a
> soft reboot and you haven't dealt with the secondaries at this point, but
> then you have bigger problems to worry about (namely that whatever you jump
> to after turning the MMU off needs to deal with the secondaries somehow).
Fair enough. I was just curious.
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
next prev parent reply other threads:[~2011-11-16 21:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 17:54 [PATCH v6 0/5] kexec fixes and soft restart code Will Deacon
2011-11-16 17:54 ` [PATCH v6 1/5] ARM: lib: add call_with_stack function for safely changing stack Will Deacon
2011-11-22 13:42 ` Catalin Marinas
2011-11-16 17:54 ` [PATCH v6 2/5] ARM: reset: implement soft_restart for jumping to a physical address Will Deacon
2011-11-22 13:41 ` Catalin Marinas
2011-11-22 13:54 ` Dave Martin
2011-11-22 14:15 ` Will Deacon
2011-11-16 17:54 ` [PATCH v6 3/5] ARM: soft_restart: disable the outer L2 when the last CPU is going down Will Deacon
2011-11-16 18:20 ` Stephen Boyd
2011-11-16 18:30 ` Will Deacon
2011-11-16 21:59 ` Stephen Boyd [this message]
2011-11-16 17:54 ` [PATCH v6 4/5] ARM: stop: execute platform callback from cpu_stop code Will Deacon
2011-11-16 17:54 ` [PATCH v6 5/5] ARM: kexec: use soft_restart for branching to the reboot buffer Will Deacon
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