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Date: Sun, 06 Nov 2005 19:01:59 -0600
From: Anthony Liguori <aliguori@us.ibm.com>
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Subject: Re: [Qemu-devel] Qemu and (Pacifica | Vanderpool)
References: <200511061019.18720.dfeustel@verizon.net>	<200511061533.13098.paul@codesourcery.com>
	<200511061616.25284.mark.williamson@cl.cam.ac.uk>
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To: qemu-devel@nongnu.org
Cc: Paul Brook <paul@codesourcery.com>

Mark Williamson wrote:

>>qemu is an emulator, not a virtualizer, so these extensions don't really
>>help.
>>    
>>
>
>They could be leveraged by kqemu one day...
>
>/me thinks we'll see a rash of Linux kernel "hypervisor modules" when VTX / 
>SVM hardware is available.
>  
>
Indeed.  I've already started my own ;-)  My initial guess is that the 
kqemu/qvm86 model would work quite well extended for VT/SVM.

That is, a kernel driver that provides a memory area that can be 
read-from/written-to in userspace, and then an ioctl interface that 
blocks while running code and returns when a sensitive instruction is 
hit.  It probably makes sense to handle most of the stuff in kernel 
space (shadow paging and such) and just return to userspace for IO 
operations.

Regards,

Anthony Liguori

>Cheers,
>Mark
>
>  
>
>>You may want to look at Xen (www.xensource.com), which already supports
>>these.
>>
>>Paul
>>
>>
>>_______________________________________________
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>>Qemu-devel@nongnu.org
>>http://lists.nongnu.org/mailman/listinfo/qemu-devel
>>    
>>
>
>
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