Re: [PATCH 3/4] KVM: x86: introduce get_kvmclock_ns

[Roman Kagan]

On Thu, Sep 01, 2016 at 05:26:14PM +0200, Paolo Bonzini wrote:
> Introduce a function that reads the exact nanoseconds value that is
> provided to the guest in kvmclock.  This crystallizes the notion of
> kvmclock as a thin veneer over a stable TSC, that the guest will
> (hopefully) convert with NTP.  In other words, kvmclock is *not* a
> paravirtualized host-to-guest NTP.

It might also be worth documenting this approach in a comment somewhere
around pvclock_gtod_notify / update_pvclock_gtod or friends.  And, if
those could be simplified due to this change, it would be great, too.

Roman.