From 8e1d260738ca89bc7c87444f95f04a026d12b496 Mon Sep 17 00:00:00 2001 From: Alex Ng Date: Thu, 8 Sep 2016 05:24:14 -0700 Subject: Drivers: hv: utils: Support TimeSync version 4.0 protocol samples. This enables support for more accurate TimeSync v4 samples when hosted under Windows Server 2016 and newer hosts. The new time samples include a "vmreferencetime" field that represents the guest's TSC value when the host generated its time sample. This value lets the guest calculate the latency in receiving the time sample. The latency is added to the sample host time prior to updating the clock. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- include/linux/hyperv.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 430619a92d3b..7d7cbff33bda 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1423,6 +1423,15 @@ struct ictimesync_data { u8 flags; } __packed; +struct ictimesync_ref_data { + u64 parenttime; + u64 vmreferencetime; + u8 flags; + char leapflags; + char stratum; + u8 reserved[3]; +} __packed; + struct hyperv_service_callback { u8 msg_type; char *log_msg; -- cgit v1.2.3