Re: [PATCH] expose kvmclock upper msr set.

From: Glauber Costa
Date: Thu Feb 24 2011 - 18:48:52 EST

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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