Messages in this thread | | | Date | Thu, 31 Jan 2013 13:41:10 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V |
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On 01/30/2013 12:53 AM, Jan Beulich wrote: > > I'm not convinced that's the right approach - any hypervisor > could do similar emulation, and hence you either want to make > sure you run on Hyper-V (by excluding all others), or you > tolerate using the emulation (which may require syncing up with > the other guest implementations so that shared resources don't > get used by two parties). > > I also wonder whether using the Hyper-V emulation (where > useful, there might not be anything right now, but this may > change going forward) when no Xen support is configured > wouldn't be better than not using anything... >
I'm confused about "the right approach" here is. As far as I understand, this only can affect a Xen guest where HyperV guest support is enabled but not Xen support, and only because Xen emulates HyperV but does so incorrectly.
This is a Xen bug, and as such it makes sense to reject Xen specifically. If another hypervisor emulates HyperV and does so correctly there seems to be no reason to reject it.
-hpa
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