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SubjectRE: [PATCH] x86: Hyper-V: register clocksource only if its advertised
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> -----Original Message-----
> From: Olaf Hering [mailto:olaf@aepfle.de]
> Sent: Friday, January 25, 2013 3:00 PM
> To: KY Srinivasan
> Cc: linux-kernel@vger.kernel.org; Greg KH; Jan Beulich (JBeulich@suse.com)
> Subject: Re: [PATCH] x86: Hyper-V: register clocksource only if its advertised
>
> On Fri, Jan 25, KY Srinivasan wrote:
>
> > Your current approach of using the "Partition Reference Counter"
> > feature bit is very fragile. Let us assume that future Windows guests
> > depend on this feature; Xen would certainly emulate this to have a
> > "good" emulation of Hyper-V and we are back to square one.
>
> If Xen starts to emulate the "Partition Reference Counter" feature,
> wouldnt it also advertise this feature?

Yes; it has to - if it expects the Windows guests to use it. This would be
no different than the other features that Xen emulates and advertises.

K. Y


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