quoted

quoted

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+  testptp -d /dev/ptp$(ethtool -T <interface> | awk '/PTP
Hardware

Clock:/ {print $NF}') -k 1

quoted

+

Does udev create a stable symlink for this, like it does for e.g.
/dev/ptp_kvm ?

Yes, you can add a specific rule for the ena ptp device

SUBSYSTEM=="ptp", ATTR{clock_name}=="ena-ptp-*", SYMLINK += "ena-

ptp"

I don't see it here yet though:

https://github.com/systemd/systemd/blob/main/rules.d/50-udev-
default.rules.in#L33

We will add a pull request to systemd which adds the above suggested rule.