This RFC patch series proposes a new ioctl PTP_SYS_OFFSET_STAT and adds support for it in the proposed virtio_rtc driver [1]. The new PTP_SYS_OFFSET_STAT ioctl provides a cross-timestamp like PTP_SYS_OFFSET_PRECISE2, plus any the following status information (for now): - for UTC timescale clocks: leap second related status, - clock accuracy. The second commit adds support for the ioctl in the proposed virtio_rtc driver, and hence depends on the patch series "Add virtio_rtc module" [1]. [1] https://lore.kernel.org/lkml/20241219201118.2233-1-quic_philber@xxxxxxxxxxx/T/#t Signed-off-by: Peter Hilber <quic_philber@xxxxxxxxxxx> Peter Hilber (2): ptp: add PTP_SYS_OFFSET_STAT for xtstamping with status virtio_rtc: Support PTP_SYS_OFFSET_STAT ioctl drivers/ptp/ptp_chardev.c | 39 ++++++++ drivers/ptp/ptp_clock.c | 9 ++ drivers/virtio/Kconfig | 4 +- drivers/virtio/virtio_rtc_driver.c | 122 +++++++++++++++++++++++- drivers/virtio/virtio_rtc_internal.h | 3 +- drivers/virtio/virtio_rtc_ptp.c | 25 +++-- include/linux/ptp_clock_kernel.h | 31 ++++++ include/uapi/linux/ptp_clock.h | 130 +++++++++++++++++++++++++- tools/testing/selftests/ptp/Makefile | 2 +- tools/testing/selftests/ptp/testptp.c | 126 ++++++++++++++++++++++++- 10 files changed, 471 insertions(+), 20 deletions(-) base-commit: 8a8009abbfa04e58f1b01b20534cac9e8fe61a46 -- 2.43.0
