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Re: [Xen-users] HVM on Dell Optiplex 755

To: "Hayawardh V" <hayawardh@xxxxxxxxx>
Subject: Re: [Xen-users] HVM on Dell Optiplex 755
From: "Andrew Lyon" <andrew.lyon@xxxxxxxxx>
Date: Thu, 6 Nov 2008 10:32:04 +0000
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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On Wed, Nov 5, 2008 at 11:11 PM, Hayawardh V <hayawardh@xxxxxxxxx> wrote:
> Hi,
> I want to run a HVM domU.
> I have a Dell Optiplex 755:
> model name    : Intel(R) Core(TM)2 Duo CPU     E4500  @ 2.20GHz

I had the same problem, turned out that the Core2 CPU in my spare
Optiplex 755 did not have VT features, I swapped the machine for
another 755 in our office which did have VT, checking a few systems at
random it seems that around 30% of our 755's do not have VT CPUs.


> I have enabled VT in BIOS settings under performance.
> However, after I boot into a linux kernel (not under Xen),
> grep vmx /proc/cpuinfo returns nothing.
> When I boot under Xen, I get
> (XEN) Intel VT-d has been enabled
> (XEN) [VT-D]iommu.c:1700: Queued Invalidation hardware not found
> (XEN) [VT-D]iommu.c:1708: Interrupt Remapping hardware not found
> What do I do?
> Regards,
> Hayawardh
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