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Date: Tue, 10 Oct 2006 19:26:08 +1000
From: Joshua Root <qemu@root.id.au>
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Subject: Re: [Qemu-devel] International Virtualization Conference
References: <20061008123019.94942.qmail@web52613.mail.yahoo.com>	<20061008143646.GA27314@jbrown.mylinuxbox.org>
	<200610090005.02895.rob@landley.net>
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To: qemu-devel@nongnu.org

Rob Landley wrote:
> On Sunday 08 October 2006 10:36 am, Jim C. Brown wrote:
>> qemu is primarily a dynamic translator not a virtualizer.
> 
> That's an implementation detail.  The end result is running programs in a 
> virtual environment, and qemu's system emulation has lots of virtual hardware 
> it attaches to virtual busses, which it performs virtual I/O to, even 
> simulating the delivery of virtual interrupts to signal completion of virtual 
> DMA.

Part of the generally accepted definition of virtualization is that the
majority of guest instructions execute directly on the real CPU with no
intervention by the VMM. QEMU + qvm86 does count as virtualization if
the system spends most of its time in user mode; QEMU on its own does
not (you run code that is very different to the original binary).

- Josh