Re: [Xen-devel] Nested Virtualization Support Host-Only Hypervisors

[Kangjie Xi <imxikangjie@xxxxxxxxx>]

I have asked the related issue on xen-users list
(https://lists.xenproject.org/archives/html/xen-users/2017-05/msg00090.html),
it has detail on hangs, if you want more detail, I can reproduce the
problem and send you more info.

HyperPlatform and SimpleVisor can work well inside VMware virtual
machine, so I think Xen or KVM should also support this.


Thanks
-kangjie

2017-06-09 16:24 GMT+08:00 Jan Beulich <JBeulich@xxxxxxxx>:
>>>> On 09.06.17 at 09:44, <imxikangjie@xxxxxxxxx> wrote:
>> Xen supports Nested
>> Virtualization(https://wiki.xenproject.org/wiki/Nested_Virtualization_in_Xen 
>> ),
>> which means I can run Xen or KVM hypervisor inside a virtual machine,
>> and then create a L2 guest. However when I run a Host-Only Hypervisor
>> (no L2 guests, like MoRE, SimpleVisor and HyperPlatform) inside of L1
>> guest, the L1 hangs.
>>
>> Is it able to make Xen Nested Virtualization to support Host-Only
>> hypervisors? It is useful for security research.
>
> Well, I'd certainly expect such to not be intentionally broken,
> but with nested virtualization still not having reached mature,
> fully supported state I'm not surprised you run into issues.
> However, without you providing (much) more detail on the
> hangs (or crashes?), there's no way forward here I'm afraid.
>
> Jan
>

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