[Xen-users] Re: Loosing vmx flag with Lenny 2.6.26-1-xen-amd64 on Q9400

[Markus Kiefer <markus@xxxxxxxxxx>]

Hi.

Problem solved. Sorry for asking.
Had to disable "VT for direct I/O" in the BIOS.
HVM works fine now. (/proc/cpuinfo still doesn't show a vmx flag, 
though, so SUSE must use one of the setups where it's hidden.).
Regards,
Markus




Markus Kiefer schrieb:
> Hi.
>
> Fajar A. Nugraha schrieb:
> > On Mon, Feb 2, 2009 at 10:23 PM, Markus Kiefer <markus@xxxxxxxxxx> wrote:
> > > > I think the HVM (as well as some other) flag is hidden intentionally
> > > > on some versions of xen. Same thing happened on my RHEL 5 + Xen 3.3.1
> > > > while the flag still shows up on RHEL 5's stock Xen. Both systems are
> > > > able to start HVM domU normally.
> > > I tried. And it didn't work.
> > > Creation stops immediately, with xm stating that my cpu doesn't 
> > > support HVM.
> > > :-/
> > Did you check the BIOS? If I remembered correctly, the flag still
> > shows even when BIOS disabled it.
> I just checked again:
> Virtualization is enabled,
> VT for direct I/O is enabled,
> Should I enable Trusted execution?
> As far as I can tell from Intel's website, there is no version of the 
> Q9400 that doesn't support VT. By the way, the machine is a Dell 
> Optiplex 755MT.
>
> > There is another looong way to check it :
> > - boot normal kernel
> > - install vmware or Virtualbox
> > - install 64bit guest
> >
> > If it works, CPU supports HVM and enabled in BIOS. If it doesn't,
> > something wrong with one of them.
> Sigh. I'll try that.
>
> Regards,
> Markus

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