From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH] pvcpuid: mask TSC invariant bit for various
	circumstances
Date: Tue, 27 Oct 2009 17:16:56 +0000
Message-ID: <C70CDB88.18933%keir.fraser@eu.citrix.com>
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To: Dan Magenheimer <dan.magenheimer@oracle.com>, "Xen-Devel (E-mail)" <xen-devel@lists.xensource.com>
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On 27/10/2009 17:03, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:

> Frankly, I'm  not very thrilled with the hack-y pvcpuid
> requirement anyway.  It seemed a nice architected interface
> if cpuid would work, but would be too easy for a well-intentioned
> app developer to use cpuid instead of pvcpuid and make
> incorrect assumptions that would result in app breakage.

What's hacky about it? It'll probably get used in any 'solution' in some
way, e.g., to probe for wacky new userland hypercall interfaces. It's our
standard interface to probe for features and information direct from the
hypervisor.

 -- Keir