Re: [PATCH v4 13/17] kvm: i8254: Deactivate APICv when using in-kernel PIT re-injection mode.

[Graf (AWS), Alexander]

> Am 04.11.2019 um 22:50 schrieb Paolo Bonzini <pbonzini@xxxxxxxxxx>:
> 
> ïOn 04/11/19 19:54, Suthikulpanit, Suravee wrote:
>> I see you point.
>> 
>>> We can work around it by adding a global mask of inhibit reasons that
>>> apply to the vendor, and initializing it as soon as possible in vmx.c/svm.c.
>>> 
>>> Then kvm_request_apicv_update can ignore reasons that the vendor doesn't
>>> care about.
>> 
>> What about we enhance the pre_update_apivc_exec_ctrl() to also return 
>> success/fail. In here, the vendor specific code can decide to update 
>> APICv state or not.
> 
> That works for me, too.  Something like return false for deactivate and
> true for activate.

I'm trying to wrap my head around how that will work with live migration. Do we also need to save/restore the deactivate reasons?

Alex

> 
> Paolo



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