x2APIC and number of the vcpu

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Hello,

I am making some research abut the x2APIC and number of max vcpus.
According to Intel if we use APIC we can only have 2^8 vcpu and if we
use x2APIC it allows 2^10 vcpu  because it has 32 bit address space
for APIC_ID. My question is: is it possible theoretically or any one
tried it? and if it is I cheched  my pc's hardware is support x2APIC
whıch version of KVM should I use for that?

Thank You
Ozgur Ozan Kilic
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