[rhos-list] RHEL6: Nested virtualization support for kvm_intel?

[Gilles Dubreuil]

On Mon, 2013-11-25 at 22:06 -0500, Andrew Cathrow wrote:
> 
> ----- Original Message -----
> > From: "Gilles Dubreuil" <gilles at redhat.com>
> > To: rhos-list at redhat.com
> > Sent: Monday, November 25, 2013 9:59:58 PM
> > Subject: [rhos-list] RHEL6: Nested virtualization support for kvm_intel?
> > 
> > Hi,
> > 
> > Maybe I'm dreaming but I thought soon we'll able to go Inception level
> > 3, well at least that's how I explain to my partner what we're doing.
> > 
> > I'm not sure if any previous OpenStack kernels did have the feature.
> > But latest RHEL6.5 kernel seems not to support nested virtualization on
> > kvm_intel kernel module.
> > 
> > I'm not 100% sure if CPU support is required besides normal vmx flag.
> > But I can't see any flag advertising such feature or not while comparing
> > Intel specs as well with my laptop where it works with Fedora.
> > 
> > If there is no specific CPU support needed then the blocker will be the
> > module. In such case, do there is any road map for the feature?
> > Didn't find much rhel6 support for it (google/BZ) either.
> 
> Not until RHEL 7, however it does work (but not supported) on AMD hardware.
> 
> 

Thanks.


> > 
> > Thanks
> > Gilles
> > 
> > 
> > # uname -a
> > Linux host10.oslab.priv 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54
> > EST 2013 x86_64 x86_64 x86_64 GNU/Linux
> > # modinfo kvm_intel | grep -i nested
> > # cat /proc/cpuinfo | grep name | uniq
> > model name      : Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
> > # cat /proc/cpuinfo | grep flags | uniq
> > flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe
> > syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good
> > xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx
> > smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt
> > tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts
> > dts tpr_shadow vnmi flexpriority ept vpid
> > 
> > 
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> > 
> > 
> 
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