Re: paravirtualization structure

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Omar Khan wrote:
> hi,
>
>    I have a couple of kvm/kernel newbie questions:
>
>    1. What is the sequence of events for a paravirtualization hypercall? I
> understand how VMX architecture works, but how does the paravirt fit in? When we
> make a paravirt sys call we avoid a VMexit, but which address space does the
> call go to?  
>   

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

>    2. Is the paravirtualization code included in the 2.6.20 kernel (if so where
> is it) or do we still need to apply the patch for it?
>
>
>   

The paravirt code is not present in 2.6.20.  You can download it using 
the instructions in http://kvm.qumranet.com/kvmwiki/Code.



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


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