Avi Kivity <[EMAIL PROTECTED]> writes:

> The hypercall sequence does not avoid a vmexit.  The guest issues a 
> vmcall instruction, which is trapped and processed by the host.
> 

Thanks for replying Avi. In your response
 (http://article.gmane.org/gmane.linux.kernel/481457) to the announcement of the
 KVM paravirtualization patch you said about the cr3 related hypercall that:

"The gain probably comes not only from avoiding the vmentry/vmexit, but also
from avoiding the flushing of the global page tlb entries."

Is the vmexit caused by the vmcall more efficient/different than the vmexit that
is caused by writing to the cr3 register say. 

Thanks

Omar Khan





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