[Qemu-devel] Re: [PATCH 8/8] kvm: Rework VCPU reset

[Jan Kiszka <jan.kiszka@siemens.com>]

Avi Kivity wrote:
> Jan Kiszka wrote:
>> Avi Kivity wrote:
>>  
>>> Jan Kiszka wrote:
>>>    
>>>> Use standard callback with highest order to synchronize VCPU on reset
>>>> after all device callbacks were execute. This allows to remove the
>>>> special kvm hook in qemu_system_reset.
>>>>         
>>> Is this needed for the lapic reset callback?
>>>
>>> If so, we can express the dependency explicitly rather than with a
>>> priority, by having cpu reset notifiers invoked when the cpu is
>>> reset. In the case of the lapic, I don't think we need an abstract
>>> mechanism;
>>> the lapic is part of the cpu, not some random device.
>>>
>>> Maybe we should even save/load it as part of the cpu.
>>>
>>>     
>>
>> QEMU is not only providing the LAPIC, but also covering the old
>> dedicated version. That makes at least HW instantiating a bit more
>> complex.
>>
>>   
> 
> What do you mean by 'old dedicated version'?

Separate chip, not part of the CPU. Some 486 system used to have this IIRC.

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux