From: Maxime Ripard <maxime.ripard@free-electrons.com>
To: Jan Kiszka <jan.kiszka@web.de>
Cc: linux-arm-kernel@lists.infradead.org,
linux-sunxi@googlegroups.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: AMR: sun7i: CPU hotplug support?
Date: Mon, 10 Nov 2014 00:17:44 +0100 [thread overview]
Message-ID: <20141109231744.GC2989@lukather> (raw)
In-Reply-To: <545FC215.7010802@web.de>
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Hi Jan,
On Sun, Nov 09, 2014 at 08:35:49PM +0100, Jan Kiszka wrote:
> did anyone already happen to look into enabling CPU hotplug for the
> Allwinner A20 in upstream? I'm currently running the sunxi-next branch
> on Banana Pi, and echo 0 > .../cpu1/online just hangs the system. The
> old 3.4 LeMaker kernel works fine in this regard. I can try to look into
> details and port things over, just want to avoid duplicate efforts.
Having hotplug support would indeed be very welcome.
However, it should be done in u-boot, through PSCI, and not in the
kernel itself.
As far as I'm aware, no one worked actively on it, beside some WIP
commit from Marc a while ago:
https://git.kernel.org/cgit/linux/kernel/git/maz/u-boot.git/commit/?h=wip/psci&id=45379c0f9cf812f0f62722f4015ec907fa5dc144
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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next prev parent reply other threads:[~2014-11-09 23:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-09 19:35 AMR: sun7i: CPU hotplug support? Jan Kiszka
2014-11-09 23:17 ` Maxime Ripard [this message]
2014-11-10 6:03 ` Jan Kiszka
2014-11-10 8:25 ` Jan Kiszka
2014-11-10 9:17 ` Marc Zyngier
2014-11-10 9:36 ` Jan Kiszka
2014-11-10 9:52 ` Marc Zyngier
2014-11-10 10:33 ` Jan Kiszka
2014-11-10 11:07 ` Marc Zyngier
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