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

[Igor Mammedov]

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.