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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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        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        kvm <kvm@vger.kernel.org>, Wanpeng Li <wanpeng.li@hotmail.com>
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From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <810b3613-72e8-4f34-2757-e622f922ae03@redhat.com>
Date: Wed, 28 Jun 2017 16:11:23 +0200
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On 28/06/2017 16:09, Wanpeng Li wrote:
>> Yes, this was my question essentially.  I would still migrate
>> nested_apf_token (as part of nested virt state), and then clear it in
>> KVM when doing the async-pf broadcast.
> Do you mean I should save nested_apf_token by GET_VCPU_EVENTS and
> restore it by SET_VCPU_EVENTS? I utilize the place of "u8 pad" in
> kvm_vcpu_events to hold nested_apf, however nested_apf_token is
> unsigned long.

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.

Paolo