Re: Xen as L1 support

[Jan Kiszka <jan.kiszka@web.de>]

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On 2013-05-15 16:59, Paolo Bonzini wrote:
> Il 15/05/2013 03:24, Ren, Yongjie ha scritto:
>>> -----Original Message-----
>>> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org]
>>> On Behalf Of Alex Palesandro
>>> Sent: Tuesday, May 14, 2013 10:51 PM
>>> To: kvm@vger.kernel.org
>>> Subject: Fwd: Xen as L1 support
>>>
>>> Hi,
>>> I'm new to KVM. I'm doing some test on nested Virtualization with Xen
>>> and KVM. I tried to test the Xen hypervisor as L1 over KVM ( Linux
>>> 3.9.0) and I found this in
>>> "xm dmesg" log ( for the complete log, see the attached file).
>>> --------------------------------------------
>>> (XEN) VMX: CPU0 has insufficent VMExit Control (00036fff but requires
>>> min 00008200)
>>> (XEN) VMX: failed to initialise.
>>> --------------------------------------------
> 
> This is the "Acknowledge interrupt on exit" control.  It shouldn't be
> hard to implement it.

Isn't this a pretty recent feature Xen should be able to live without -
if it finds itself on a (virtually) older CPU?

Jan


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