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Subject: Re: [PATCH v6 3/4] KVM: async_pf: Force a nested vmexit if the
 injected #PF is async_pf
To: Wanpeng Li <kernellwp@gmail.com>
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From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <92bdfd0d-f208-eeea-4d03-0dfddd467338@redhat.com>
Date: Wed, 28 Jun 2017 16:20:35 +0200
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On 28/06/2017 16:17, Wanpeng Li wrote:
>> If for now we can leave out the GET/SET_VCPU_EVENTS changes, that would
>> be best.  nested_apf and nested_apf_token should be migrated together
>> with the rest of the nested virt state.
> Radim explains why we at least needs nested_apf here:
> 
>> nested_apf is not #PF: if we didn't pass nested_apf, then the exception would be injected as #PF to L2 after migration.

Yes, but migration of a L1 hypervisor is broken anyway.

> Do you mean we can ignore it here and depends on Jim's patches to
> completely handle it?

Ignore it here, remember it when someone picks up Jim's patches, and
also serialize nested_apf_token.

Paolo