Re: [PATCH v5 4/7] kvm, mem-hotplug: Reload L1' apic access page on migration in vcpu_enter_guest().

[Paolo Bonzini]

Il 11/09/2014 16:21, Gleb Natapov ha scritto:
> As far as I can tell the if that is needed there is:
> 
> if (!is_guest_mode() || !(vmcs12->secondary_vm_exec_control & ECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
>     write(PIC_ACCESS_ADDR)
> 
> In other words if L2 shares L1 apic access page then reload, otherwise do nothing.

What if the page being swapped out is L1's APIC access page?  We don't
run prepare_vmcs12 in that case because it's an L2->L0->L2 entry, so we
need to "do something".

Paolo
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