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