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The vmclock device provides a PTP clock source and precise timekeeping across live migration and snapshot/restore operations. The binding has a required memory region containing the vmclock_abi structure and an optional interrupt for clock disruption notifications. The full spec is at https://uapi-group.org/specifications/specs/vmclock/ Signed-off-by: David Woodhouse <[email protected]> Signed-off-by: Babis Chalios <[email protected]> Reviewed-by: Krzysztof Kozlowski <[email protected]> Tested-by: Takahiro Itazuri <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>