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SubjectRe: [RFC PATCH] Add IPI entry for CPU UP
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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