From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Mon, 10 Nov 2014 00:17:44 +0100 Subject: AMR: sun7i: CPU hotplug support? In-Reply-To: <545FC215.7010802@web.de> References: <545FC215.7010802@web.de> Message-ID: <20141109231744.GC2989@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: