From a0e136d436ded817c0aade72efdefa56a00b4e5e Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Tue, 24 Jan 2017 15:09:42 -0200 Subject: PTP: add kvm PTP driver Add a driver with gettime method returning hosts realtime clock. This allows Chrony to synchronize host and guest clocks with high precision (see results below). chronyc> sources MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== To configure Chronyd to use PHC refclock, add the following line to its configuration file: refclock PHC /dev/ptpX poll 3 dpoll -2 offset 0 Where /dev/ptpX is the kvmclock PTP clock. Signed-off-by: Marcelo Tosatti Acked-by: Richard Cochran Signed-off-by: Paolo Bonzini --- drivers/ptp/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/ptp/Makefile') diff --git a/drivers/ptp/Makefile b/drivers/ptp/Makefile index 8b58597298de..530736161a8b 100644 --- a/drivers/ptp/Makefile +++ b/drivers/ptp/Makefile @@ -6,3 +6,4 @@ ptp-y := ptp_clock.o ptp_chardev.o ptp_sysfs.o obj-$(CONFIG_PTP_1588_CLOCK) += ptp.o obj-$(CONFIG_PTP_1588_CLOCK_IXP46X) += ptp_ixp46x.o obj-$(CONFIG_PTP_1588_CLOCK_PCH) += ptp_pch.o +obj-$(CONFIG_PTP_1588_CLOCK_KVM) += ptp_kvm.o -- cgit