On Fri, Sep 20, 2019 at 7:23 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote: > > On Fri, 20 Sep 2019, Paolo Bonzini wrote: > > > 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. > > Indeed. #ifdef WHATEVERTHEHECK does not go anywhere. If at all this needs > to be a runtime switch, but I have yet to understand the whole picture of > this. Yeah, I will try to make this a runtime switch. As for the PTP driver, I don't think it will work for us because we need CLOCK_MONOTONIC and CLOCK_BOOTTIME to match the host, and from my understanding, PTP doesn't solve that. Thanks, -- Suleiman
