Hi Cyril, On 07/11/17 23:15, Cyril Novikov wrote: > Hi, all! > > The product that I work on supports physical device assignment (aka > "pass-through") to virtual machines, which means we need to take > portions of the physical FDT and include them in the guest FDT. This > needs to happen automatically in software. Is this for Linux, or some other OS? If Linux, do you get the FDT from /sys/firmware/fdt or some other method? -Frank > The problem is phandles, because we cannot identify them in the blob > and therefore can't find any dependent devices/nodes that also need > to be included in the guest FDT. So the process cannot be fully > automated. We can't even advise the user what other devices should be > assigned to the VM. The hypervisor runs or bare metal, so having to > parse the source DTS files for this is very inconvenient. > > Would it be possible to add metadata properties to the binary FDT > format, which would identify other property cells that are in fact > phandles? It could be a per-node property or a single root node > property, up to you guys. DTC would then automatically generate the > metadata property along with the phandle property when compiling the > DTS. > > -- Cyril > > -- To unsubscribe from this list: send the line "unsubscribe > devicetree-spec" in the body of a message to > majordomo@xxxxxxxxxxxxxxx More majordomo info at > http://vger.kernel.org/majordomo-info.html . > -- To unsubscribe from this list: send the line "unsubscribe devicetree-spec" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
