diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2017-01-24 18:09:42 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-08 17:16:20 +0100 |
| commit | a0e136d436ded817c0aade72efdefa56a00b4e5e (patch) | |
| tree | 8dabe40530f4b7e5742cece09fff99c6b6c2ed82 /drivers/ptp/Makefile | |
| parent | kvmclock: export kvmclock clocksource and data pointers (diff) | |
| download | linux-a0e136d436ded817c0aade72efdefa56a00b4e5e.tar.xz linux-a0e136d436ded817c0aade72efdefa56a00b4e5e.zip | |
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 <mtosatti@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'drivers/ptp/Makefile')
| -rw-r--r-- | drivers/ptp/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
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 |