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I'd like to turn my Linux Mint desktop into Xen host.

Will I be able to use VirtualBox inside Dom0, just like without Xen? What the limitations would be (if any)?

I believe, that this might not be possible, since both VirtualBox and Xen utilizes CPU rings, and they might fall into conflict.

Note, that I need to run VirtualBox under Dom0, not DomU.

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up vote 2 down vote accepted

According to this thread, titled: "VirtualBox Running on top of XEN kernel, possible?" it sounds like the answer is no it isn't possible.

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up vote 0 down vote

No, you can not for the reasons you stated.

BUT: You can run a Dom0 without hardware-VT within a VBox-VM. From there you can lauch DomUs in PV (not HVM) mode.

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Will the XEN support VGA Passthrough then? – Adam Ryczkowski Feb 12 '14 at 10:12
    
@AdamRyczkowski I think so (on the Dom0), but this has changed - more recent xen-versions did a better support there. On the DomU I know that older (3.x) xen-versions did not support pass-through in PV-mode. – Nils Feb 12 '14 at 10:20

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