Re: bugreport: guest crashes on reboot in KVM 65 on AMD

[Avi Kivity <avi@qumranet.com>]

Joerg Roedel wrote:
> On Mon, Apr 14, 2008 at 01:29:50PM +0300, Avi Kivity wrote:
>   
>> Joerg Roedel wrote:
>>     
>>> Only the state saved in the VMCB is undefined after an intercepted
>>> shutdown event. 
>>>       
>> The vmcb stores two types of states, guest state and control
>> information.  Are both undefined?
>>     
>
> Only the guest state is undefined.
>
>   

Okay, so we don't need to init_vmcb() there.  We can just reset the 
processor (actually, we should rely on userspace to reset the processor; 
IIRC shutdown does not reset the processor directly; instead the system 
board detects the shutdown and converts it to a reset, and we may want 
to emulate other types of system boards).

>>> I am not sure if I understand your second question, what
>>> do you mean with "core melting down" vs. guest initiated shutdown?
>>>  
>>>       
>> IIRC shutdown can occur not only as a result of triple faults, due to
>> other internal errors or inconsistent state.  Not sure about that
>> though.
>>     
>
> No, there is no way to to differentiate between a shutdown caused by a
> triple fault and other shutdown situations. If the shutdown event is
> caused by a too hot processor it is not intercepted. This situation is
> handled like a normal cpu shutdown.
>   

Well, that gives you some differentiation (enough for our needs).

-- 
error compiling committee.c: too many arguments to function


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