Re: [Xen-users] Xen vmx flag question.

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Sep 06, 2010 at 07:48:27AM -0700, Periko Support wrote:
>    On Sat, Sep 4, 2010 at 5:17 AM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
> 
>      On Wed, Sep 01, 2010 at 02:24:11PM -0700, Periko Support wrote:
>      >    Hi.
>      >
>      >    I have a new server and learning Xen. The server runs Centos 5.5
>      Xen
>      >    3.0.3.
>      >
>      >    The machine is a Supermicro 6026T-TF with the MoBo X8DTE/X8DT6 with
>      the
>      >    Intel E5620 which Intel say that support Virtualization.
>      >
>      >    I have enable this feature in my BIOS and other settings about
>      Technology
>      >    and I still cannot see the flag:
>      >
>      >    -Intel Virtualization Tech Enable.
>      >    -Intel VT-d Enable.
>      >
>      >    I don't see the flag vmx went I run cat /proc/cpuinfo
>      >
>      >    If Centos doesn't show this flag it means that Xen cannot run
>      >    Full-Virtuliation Guest OS?
>      >
>      >    Thanks all for your time.
> 
>      That's because "/proc/cpuinfo" only shows Xen dom0 Linux info,
>      which is a *VM* !
> 
>      Xen *hypervisor* (xen.gz) uses VMX, so dom0 doesn't see it.
>      See "xm info" and check the caps, you should see hvm listed there.
> 
>      Also read "xm dmesg" to see the Xen hypervisor boot messages..
>      there you should VMX/HVM getting enabled in the hypervisor.
>      -- Pasi
> 
>      _______________________________________________
>      Xen-users mailing list
>      [2]Xen-users@xxxxxxxxxxxxxxxxxxx
>      [3]http://lists.xensource.com/xen-users
> 
>    Hi, thanks all for your comments.
> 
>    Now, lets get the info u say running xm dmesg:
> 
>  xm  dmesg | grep  VMX
> 
>  (XEN) VMX: VPID is available.
>  (XEN) HVM: VMX enabled
>  (XEN) VMX: MSR intercept bitmap enabled
> 
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
>  (XEN) VMX: VPID is available.
> 
> 
>    xm  dmesg | grep  HVM
>    (XEN) HVM: VMX enabled
>    (XEN) HVM: Hardware Assisted Paging detected and enabled.
> 
>    This mean that I have my server ready for HVM?
> 

Yes, you have HVM support.

"xm info" will also show it in the caps.

-- Pasi


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