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Per the Vulkan spec, the device UUID should be identical between reboots. It should also uniquely identify different instances of the same device, e.g. 2 identical GPUs connected to different PCI ports, but D3D doesn't currently expose a way to do both of these things. Prefer persistence over uniqueness here. Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Bill Kristiansen <billkris@microsoft.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17340>