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

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Message-ID: <20130417130102.GE6801@redhat.com>
Date:	Wed, 17 Apr 2013 16:01:02 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Jan Beulich <JBeulich@...e.com>
Cc:	KY Srinivasan <kys@...rosoft.com>,
	"olaf@...fle.de" <olaf@...fle.de>, "bp@...en8.de" <bp@...en8.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"hpa@...or.com" <hpa@...or.com>
Subject: Re: [PATCH 2/3] X86: Add a check to catch Xen emulation of Hyper-V

On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
> >>> On 17.04.13 at 15:20, KY Srinivasan <kys@...rosoft.com> wrote:
> > If I recall correctly, the issue here was that Xen was enabling Hyper-V 
> > emulation un-conditionally even for Linux guests.
> 
> To make this a little more precise - Xen is doing so only when the
> guest config tells it to.
> 
> Jan

So it's something explicitly requested for this guest?  Then I don't
understand why does not make sense to override it in guest.
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