On 11/16/2010 06:56 PM, Avi Kivity wrote:
quoted text
> On 11/16/2010 06:43 PM, Peter Zijlstra wrote:
>>
>>> No.  Hypercalls are voluntary and known, but most exits are involuntary
>>> and unknown to the guest.  Any memory access can generate a page fault,
>>> and any host interrupt will exit the guest.
>> Right, but we could not make the guest jump to a special stub on vcpu
>> enter? I guess we could simply because we have the hypervisor under
>> control.
>
> No, some entries inject an interrupt or exception, so the next rip 
> value is unknown (without doing a lot of extra slow calculations).

Also, consider an exit within the stub (if the stub is paged out, for 
example).

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

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