linux-kernel - Re: [PATCH] expose kvmclock upper msr set.

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Date:	Thu, 24 Feb 2011 20:48:40 -0300
From:	Glauber Costa <glommer@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] expose kvmclock upper msr set.

On Thu, 2011-02-24 at 18:24 -0500, Steven Rostedt wrote:
> On Wed, Feb 23, 2011 at 12:44:14PM -0500, Glauber Costa wrote:
> > We've been supporting kvmclock MSRs in the 0x4b564d00-0x4b564dff range
> > for a while now, but we're not exposing it yet, meaning nobody is using it.
> > This simple patch takes care of that.
> 
> Is nobody using it because it was never exposed? Or because nobody ever
> needed it, and we don't care (thus don't bother supporting it).
> 
The former. Our guest kernels will only rely on features that are
exposed, meaning that if they are not, the guest kernel will never know
it is available. 


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