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Re: [Qemu-arm] [Qemu-devel] VCPU hotplug on KVM/ARM

From: David Hildenbrand
Subject: Re: [Qemu-arm] [Qemu-devel] VCPU hotplug on KVM/ARM
Date: Thu, 1 Mar 2018 14:32:39 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

On 01.03.2018 11:05, Peter Maydell wrote:
> On 1 March 2018 at 09:50, Igor Mammedov <address@hidden> wrote:
>> In QEMU on x86 (and I think ppc, s390 as well), we create vCPUs on demand.>>
>> It would be nice if ARM would be able to do that too,
>> so that it could take advantage of the same code.
> It's not clear to me how that would work, given that for
> instance the interrupt controller wants to know up-front
> how many CPUs it has to deal with.

So how is cpu hotplug handled in HW? Or doesn't it even exist there?

(we have max_cpus for the interrupt controller, but not sure if that is
what we want)

> thanks
> -- PMM


David / dhildenb

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