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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 <dwmw@amazon.co.uk> Signed-off-by: Babis Chalios <bchalios@amazon.es> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> Tested-by: Takahiro Itazuri <itazur@amazon.com> Link: https://patch.msgid.link/20260130173704.12575-4-itazur@amazon.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>