Re: [Xen-devel] Re: [Xen-users] Nested Virtualisation question

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 07:47 +0100 on 04 Apr (1301903251), Jeroen Groenewegen van der Weyden wrote:
> Hello,
> 
> I have A question about nested virtualisation, the xen user list 
> suggested to post the question here.
> I need nested virtualisation to run an application on out en 
> environment, which uses kvm it-self.
> 
> I suppose I have to apply these patches:
> - 
> http://xen.markmail.org/search/?q=nested%20vmx#query:nested%20vmx+page:1+mid:z33lihxnbdjghua5+state:results
> -  or http://xenbits.xen.org/ext/cegger/nestedhvm/
> 
> Is it correct these patches are now in the xen-unstable branch?

Not just yet.  There were two problems outstanding with patch #12 of the
latest version (a TLB flush race and a subsequent deadlock in the fix),
which are both fixed.  As soon as Christoph posts his fixes, the patch
series will be applied. 

Cheers,

Tim.

> Anything else to get me on my way.
> 
> 
> My goal is
> 
> DOM0
>   openSUSE 11.4 with xen 4.X
> 
> DOMU1
>   SLES 11 SP1
>    kvm guest HVM domu1a (propetary OS)
>    kvm guest HVM domu1b (sles 10 sp3)
>    kvm guest HVM domu1c (sles 10 sp3)
>    kvm guest HVM domu1b (sles 10 sp3)
> 
> Op 3-4-2011 23:29, Todd Deshane schreef:
> > On Sun, Apr 3, 2011 at 8:32 PM, Jeroen Groenewegen van der Weyden
> > <groen692@xxxxxxxxx>  wrote:
> >> I now am in the position to start testing your suggestion.
> >>
> >> An additional question, is it correct the patches you mention here are part
> >> of the xen4.2-unstable branch?
> >> are these patches for vt-x or for svm only? the developer seems to be from
> >> amd. My machines are running on intel.
> >>
> > The latest patch series is here:
> > http://xen.1045712.n5.nabble.com/PATCH-00-12-Nested-Virtualization-Overview-td3415672.html
> >
> > Not sure if it has been accepted yet or not. You can email the
> > developer and/or devel list for confirmation.
> >
> > Thanks,
> > Todd
> >
> >> mfg,
> >> Jeroen
> >>
> >> Op 15-2-2011 16:21, Todd Deshane schreef:
> >>> On Tue, Feb 15, 2011 at 6:47 AM, Jeroen Groenewegen van der Weyden
> >>> <groen692@xxxxxxxxx>    wrote:
> >>>> The why is a good question,
> >>>> We use xen as out main virtualisation platform. But now there are
> >>>> applications that use virtualisation it self. In my case I have an
> >>>> application that uses kvm. So to put it on our xen server it needs to be
> >>>> nested. I guess in the future more of these situation will appear.
> >>>>
> >>>> I read somethings about nested virtualisation and I wonder If somebody
> >>>> has
> >>>> any experience with it.
> >>>>
> >>> To run KVM inside of a guest you need virtualization support within
> >>> the guest (running nested xen doesn't require the double nested
> >>> (unless you want to do HVM within the nested of course))
> >>>
> >>> Patches can be found here:
> >>>
> >>> http://xen.markmail.org/search/?q=nested%20vmx#query:nested%20vmx+page:1+mid:z33lihxnbdjghua5+state:results
> >>>
> >>> I believe KVM should also have support for nested vmx and nested svm.
> >>>
> >>> The use cases are fairly slim, so finding users/testers is often
> >>> difficult.
> >>>
> >>> Please report any bugs you find to the appropriate devel lists and cc
> >>> the appropriate nested virtualization maintainers .
> >>>
> >>> Hope that helps.
> >>>
> >>> Thanks,
> >>> Todd
> >>>
> >>> _______________________________________________
> >>> Xen-users mailing list
> >>> Xen-users@xxxxxxxxxxxxxxxxxxx
> >>> http://lists.xensource.com/xen-users
> >>>
> >>
> >
> >
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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