Re: [Qemu-devel] Re: [PATCH 0/8] kvm: Fixes, cleanups and live migration

[Gleb Natapov]

On Sat, May 02, 2009 at 10:12:57PM +0300, Avi Kivity wrote:
> Gleb Natapov wrote:
>>>
>>> I think the right thing to do with this is introduce a kvm-cpu savevm 
>>>  that stores this information since it isn't relevant to TCG.  I 
>>> think  it's arguable whether you want instruction length there (can 
>>> you get it  reliably on SVM?).
>>>
>>>     
>> We can't get it on SVM without instruction decoding, but it is not required
>> on SVM. It is absolutely essential for soft interrupt/exception injection
>> on VMX and has to be a part of migratable state.
>>   
>
> We need it in some neutral form so cross-vendor migration can work.
>
VMX->SVM No problem.
SVM->VMX bad luck :)  We will have to decode instruction ourself. 

--
                        Gleb.