[CentOS-virt] Centos 7 newer kernel needed

Laurentiu Soica
Thu, 04 Aug 2016 06:41:15 -0000

Hello Xlord,

The CPU does have VT support and I already have the nested KVM enabled.

Checking the Linux Kernel release notes I saw that the nested kvm feature
was implemented in 3.10 but he EPT support is in 3.12.

So Centos 7's kernel which is 3.10 does have the EPT support? Is there a
way to check that the EPT support is available in the kernel?

Thank you,
Laurentiu

On Thu, Aug 4, 2016, 06:04 -=X.L.O.R.D=- <xlord.sl at gmail.com> wrote:

> Dear Laurentiu,
>
> Please check below info since assume your CentOS7 box CPU processor
> already VT supported in advance.
>
> 1)     Checkpoint #1: Hardware and Kernel modules
>
> a.     cat /proc/cpuinfo | grep vmx
>
> b.     cat /sys/module/kvm_intel/parameters/nested (if ?N? then go to
checkpoint #2)
>
> 2)     Checkpoint #2: Assume your CentOS box support
>
> *a.     **echo 'options kvm-intel nested=y' >>
/etc/modprobe.d/*dist.conf
>
> b.     modprobe kvm-intel
>
> 3)      Checkpoint #3: Verification
>
> a.       Reboot yout CentOS box
>
> b.     cat /sys/module/kvm_intel/parameters/nested (if ?Y? then you can
carry one process the KVM installation.
>
>
>
> PS: Source:
https://lalatendu.org/2015/11/01/kvm-nested-virtualization-in-fedora-23/ which
should be very similar with CentOS and CentOS 7 already capable with on with KVM
Nested EPT with CPU pass-through options supported. Hope that helps &
cheers!!
>
> Xlord
>
>
>
> *From:* centos-virt-bounces at centos.org [mailto:
> centos-virt-bounces at centos.org] *On Behalf Of *Laurentiu Soica
> *Sent:* Thursday, August 4, 2016 3:07 AM
> *To:* centos-virt at centos.org
> *Subject:* [CentOS-virt] Centos 7 newer kernel needed
>
>
>
> Hello,
>
> I am looking for a Linux kernel for Centos 7 that implements a feature
> introduced in kernel version 3.12:
>
> "nested EPT support to KVM's nested VMX."
>
> If anyone has used this feature with Centos 7, please let me know.
>
> Laurentiu
>
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