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

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> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Wednesday, April 17, 2013 11:51 AM
> To: KY Srinivasan; Michael S. Tsirkin
> Cc: olaf@xxxxxxxxx; bp@xxxxxxxxx; apw@xxxxxxxxxxxxx; x86@xxxxxxxxxx;
> tglx@xxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx;
> jasowang@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; hpa@xxxxxxxxx
> 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@xxxxxxxxxxxxx> 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.

Regards,

K. Y
> 
> Jan
> 
> 


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