From: Paul Mundt <lethal@linux-sh.org>
To: linux-sh@vger.kernel.org
Subject: Re: [PATCH] ARM: mach-shmobile: Fix headsmp.S code to use CPUINIT
Date: Mon, 09 Jan 2012 01:38:36 +0000 [thread overview]
Message-ID: <20120109013836.GG25648@linux-sh.org> (raw)
On Wed, Dec 28, 2011 at 04:44:06PM +0900, Magnus Damm wrote:
> Convert the low level SMP assembly code for SH-Mobile ARM
> from using the INIT to the CPUINIT section. This unbreaks
> onlining of CPUs using the CPU hotplug interface:
>
> echo 1 > /sys/devices/system/cpu/cpu1/online
>
> Without this fix the reset vector code used by CPU hotplug
> will be freed as init section data and CPU cores cannot
> be brought online.
On Wed, Dec 28, 2011 at 04:47:16PM +0900, Magnus Damm wrote:
> Add the function shmobile_platform_kill_cpu() to allow
> SoC specific code to tie in their CPU shutdown code.
On Wed, Dec 28, 2011 at 04:53:16PM +0900, Magnus Damm wrote:
> Add cache flushing code to the SH-Mobile specific CPU hotplug
> implementation. While at it, add a cpu mask to make sure the
> cache flushing code is finished in platform_cpu_die() before
> letting the SoC-specific code in shmobile_platform_cpu_kill()
> proceed with turning off power.
>
> Without this code CPU hotplug offline fails when cache is
> enabled on Cortex-A9 based SoCs.
All applied, thanks.
next reply other threads:[~2012-01-09 1:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-09 1:38 Paul Mundt [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-12-28 7:44 [PATCH] ARM: mach-shmobile: Fix headsmp.S code to use CPUINIT Magnus Damm
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