linux-kernel - Re: [RFC 0/2] kvm: Use host timekeeping in guest.

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Message-ID: <1ec0b238-61a7-8353-026e-3a2ee23e6240@redhat.com>
Date:   Fri, 20 Sep 2019 09:48:03 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Suleiman Souhlal <suleiman@...gle.com>, rkrcmar@...hat.com,
        tglx@...utronix.de
Cc:     john.stultz@...aro.org, sboyd@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [RFC 0/2] kvm: Use host timekeeping in guest.

On 20/09/19 08:27, Suleiman Souhlal wrote:
> To do that, I am changing kvmclock to request to the host to copy
> its timekeeping parameters (mult, base, cycle_last, etc), so that
> the guest timekeeper can use the same values, so that time can
> be synchronized between the guest and the host.
> 
> Any suggestions or feedback would be highly appreciated.

I'm not a timekeeping maintainer, but I don't think the
kernel/time/timekeeping.c changes are acceptable.

Is the PTP driver not enough?

Paolo