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Re: [Qemu-devel] [RFC 0/7+1] QEMU APIC ID + topology bug + CPU hotplug

From: Igor Mammedov
Subject: Re: [Qemu-devel] [RFC 0/7+1] QEMU APIC ID + topology bug + CPU hotplug
Date: Thu, 12 Jul 2012 15:51:48 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1

On 07/10/2012 10:22 PM, Eduardo Habkost wrote:
The hotplug case is a bit more complex: we need to either:
  - have a mechanism to let the ACPI SSDT code know what's the APIC ID of
    hotplugged CPUs; or
  - make Seabios run some code in the hotplugged CPU (I am assuming that this is
    simply not possible).
If SMM is supported by qemu/kvm than it will be possible to trigger SMI from
APCI method and SMI handler, that are supposed to run on all CPUs (including 
hot-plugged one)
, could fixup APIC ID of added CPU in some memory region used by ACPI.


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