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

[Paolo Bonzini]

On 02/09/2016 17:24, Roman Kagan wrote:
> 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.

Yes, Radim or I are going to look at it next...

Paolo