Messages in this thread | | | Date | Mon, 11 Jan 2016 10:06:44 +0000 | From | Catalin Marinas <> | Subject | Re: [RFC PATCH] Add IPI entry for CPU UP |
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On Mon, Jan 11, 2016 at 09:59:25AM +0000, Lorenzo Pieralisi wrote: > On Mon, Jan 11, 2016 at 03:10:40PM +0800, Zhaoyang Huang wrote: > > In some ARM SOCs, IPI interrupt is used for hotplug in one cpu, that is, > > sending a IPI to the core in WFI and powerdown status. So Add a IPI > > entry for handle this kind of cpu up interrupt > > On arm64 SOCs, with a mainline kernel, you can only hotplug CPUs out > and back in by using the PSCI firmware interface, which does not > require an IPI to boot a CPU, therefore this patch is useless.
I fully agree.
BTW, such patches should cc linux-arm-kernel@lists.infradead.org as well since they are ARM related.
-- Catalin
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