Mathieu Desnoyers wrote:
quoted text
> * Jeremy Fitzhardinge (jeremy@goop.org) wrote:
>   
>> Ingo Molnar wrote:
>>     
>>> * Ingo Molnar <mingo@elte.hu> wrote:
>>>
>>>   
>>>       
>>>> thanks Mathieu, i've picked this up into x86.git for more testing.
>>>>     
>>>>         
>>> ... but had to drop it due to missing PARAVIRT support which broke the 
>>> build. I guess on paravirt we could just initially define 
>>> INTERRUPT_RETURN_NMI_SAFE to iret, etc.?
>>>       
>> I have not yet implemented Xen's support for paravirtual NMI, so there's no 
>> scope for breaking anything from my perspective.  When I get around to NMI, 
>> I'll work around whatever's there.  I don't know if lguest or VMI has any 
>> guest NMI support.
>>
>>    J
>>
>>     
>
> I wonder if we could simply paravirtualize the popf instruction, which
> seems to be the only one requiring to run in ring 0.

Hm, I'd need to think about it more.  There's more to NMI's than just 
the popf.

    J

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