[PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V

KY Srinivasan kys at microsoft.com
Wed Apr 17 16:28:36 UTC 2013

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich at suse.com]
> Sent: Wednesday, April 17, 2013 11:51 AM
> To: KY Srinivasan; Michael S. Tsirkin
> Cc: olaf at aepfle.de; bp at alien8.de; apw at canonical.com; x86 at kernel.org;
> tglx at linutronix.de; devel at linuxdriverproject.org; gregkh at linuxfoundation.org;
> jasowang at redhat.com; linux-kernel at vger.kernel.org; hpa at zytor.com
> Subject: RE: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V
> >>> On 17.04.13 at 17:31, KY Srinivasan <kys at microsoft.com> wrote:
> > If Xen were to change where it would not unconditionally emulate Hyper-V, I
> > would not be opposed to taking
> > this check out.
> But it doesn't do this unconditionally, only upon admin request.

>From the discussion we had a couple of months ago, the default setting was to enable
Hyper-V emulation for all guests. If this is not the case, we ought to be able to drop this.
However, I think it is not reasonable to add additional checks (in addition to hypervisor check)
to customize the run-time in the guest for the specific Hypervisor.


K. Y
> Jan

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