On 5/29/2026 12:59 PM, Thomas Gleixner wrote: > This is an update to V1 which can be found here: > > https://lore.kernel.org/lkml/[email protected] > > PTP wants to grow new snapshot functionality, which provides not only the > captured CLOCK* values, but also the underlying clocksource counter value. > > https://lore.kernel.org/[email protected] > > There was quite some discussion in seemingly related threads how to capture > these values and how to provide core infrastructure so that driver writers > have something to work with > > https://lore.kernel.org/[email protected] > https://lore.kernel.org/[email protected] > > This series implements the timekeeping related mechanisms to: > > 1) Capture CLOCK values along with the clocksource counter value for > non-hardware based sampling > > 2) Expanding the hardware cross time stamp mechanism to hand back the > clocksource counter value, which was captured by the device, along > with the related CLOCK values > > 3) Adding AUX clock support to the hardware cross timestamping core > > 4) Add support for derived clocksources to the snapshot mechanism (New > in V2) > > Changes vs. V1: > > - Fixed the ptp_ocp typo - 0-day, Jakub > > - Renamed the system_time_snapshot members sys and raw so systime and > monoraw to make them less ambigous. > > - Fixed the error case return values of get_device_system_crosststamp() > > - Made ktime_snapshot_id() void as there is no point for the return > value, which is nowhere checked and cannot be propagated. > system_time_snapshot::valid has to be evaluated at the call sites > anyway. - Jacob > > - Picked up the first patch from Davids follow up series, which extends > the snapshot mechanism so that derived clocksources (like kvmclock and > Hyper-V scaled TSC) can return the actual underlying hardware counter > value (TSC for the two examples). > > - Collected Reviewed/Acked/Tested-by tags > > Delta patch against v1 below. > > The series is based on v7.1-rc2 and also available from git: > > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git > timekeeping-ptp-extend-v2 > > Thanks,
The changes in v2 are great! Appreciate it. Reviewed-by: Jacob Keller <[email protected]>
