Re: [PATCH for-6.0 2/8] spapr/xive: Introduce spapr_xive_nr_ends()

[Cédric Le Goater]

>>> This complexifies migration because we have to guess at
>>> post load if we should claim the IPI in KVM or not. The
>>> simple presence of the vCPU isn't enough : we need to
>>> guess if the guest actually configured the IPI or not.
>>
>> The EAT will be transferred from the source and the call to 
>> kvmppc_xive_source_reset_one() should initialize the KVM 
>> device correctly on the target for all interrupts.
>>
> 
> Except that the EAS appears as valid for all IPIs, even
> though the source didn't claim them at the KVM level. 

why ? we would stop claiming IPIs in spapr_irq_init() and so
they won't appear as being valid anymore, at boot time or
restore time.


C.