Laptops and hardware virtualization

[gaf-mNDKBlG2WHs at public.gmane.org (Jerry Feldman)]

On 02/15/2010 06:14 PM, Richard Pieri wrote:
> On Feb 15, 2010, at 5:28 PM, Jerry Feldman wrote:
>  =20
>> This I think is one of the things that differentiates VMware in that i=
t
>> can run without the need for virtualization support.
>>    =20
> That's a misleading statement.  Almost all of the major players run wit=
hout virtualization extensions.  VMware and Parallels use their own virtu=
al CPU emulation libraries.  Xen, Linux KVM and VirtualBox use QEMU.  The=
y just run better with the extensions enabled.
>
> The exception is Windows Virtual PC in Windows 7, used for Windows XP M=
ode.  Windows Virtual PC requires virtualization extensions enabled or it=
 refuses to start.
>  =20
KVM does not run without the extension. QEMU is normally used with KVM,
but can run alone and certainly does not require CPU virtualization.
Hyper-V will not run without the virtualization extensions (but not on a
laptop). VMWare and Virtualbox predate the virtualization extensions,
anmd AFIK Xen has required the viritualization support for a number of
years.

--=20
Jerry Feldman <gaf-mNDKBlG2WHs at public.gmane.org>
Boston Linux and Unix
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