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authorVivek Thampi <vithampi@vmware.com>2020-02-28 08:32:46 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-06 04:25:07 +0300
commit7d10001e20e46ad6ad95622164686bc2cbfc9802 (patch)
tree107641721daeeb7e94e8c5839bbc8566eee6c2c5 /drivers/ptp/Makefile
parenta368e860adb14f7496033051c1712dfd214f6cb1 (diff)
downloadlinux-7d10001e20e46ad6ad95622164686bc2cbfc9802.tar.xz
ptp: add VMware virtual PTP clock driver
Add a PTP clock driver called ptp_vmw, for guests running on VMware ESXi hypervisor. The driver attaches to a VMware virtual device called "precision clock" that provides a mechanism for querying host system time. Similar to existing virtual PTP clock drivers (e.g. ptp_kvm), ptp_vmw utilizes the kernel's PTP hardware clock API to implement a clock device that can be used as a reference in Chrony for synchronizing guest time with host. The driver is only applicable to x86 guests running in VMware virtual machines with precision clock virtual device present. It uses a VMware specific hypercall mechanism to read time from the device. Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Vivek Thampi <vithampi@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp/Makefile')
-rw-r--r--drivers/ptp/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/ptp/Makefile b/drivers/ptp/Makefile
index 01ff7fc3e820..7aff75f745dc 100644
--- a/drivers/ptp/Makefile
+++ b/drivers/ptp/Makefile
@@ -14,3 +14,4 @@ ptp-qoriq-y += ptp_qoriq.o
ptp-qoriq-$(CONFIG_DEBUG_FS) += ptp_qoriq_debugfs.o
obj-$(CONFIG_PTP_1588_CLOCK_IDTCM) += ptp_clockmatrix.o
obj-$(CONFIG_PTP_1588_CLOCK_IDT82P33) += ptp_idt82p33.o
+obj-$(CONFIG_PTP_1588_CLOCK_VMW) += ptp_vmw.o