kerf: preserve PCI host bridge metadata - #11
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Kerf rebuilds an instance device tree from the parsed baseline. Dropping pci-host-bridges during that round trip leaves the spawned kernel without the immutable ECAM descriptors required to construct its synthetic PCI roots. Add a PCI host-bridge model, parse it from binary and source device trees, validate segment and bus ranges, ECAM alignment, and overlap, and emit the metadata into generated instance trees. Cover valid round trips and malformed descriptors in the baseline tests. Signed-off-by: Nikolay Nikolaev <nicknickolaev@gmail.com>
The device-tree compiler can render CPU lists with an explicit /bits/ width and hexadecimal cells. Treating that syntax as plain decimal values makes Kerf reject valid extracted instance trees.\n\nAccept the 32-bit and 64-bit forms, parse each cell with base detection, and limit the lookup to direct /resources properties so nested NUMA CPU lists cannot shadow the global inventory. Cover the legacy and explicit-width forms in the parser tests.\n\nSigned-off-by: Nikolay Nikolaev <nicknickolaev@gmail.com>
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Kerf must preserve PCI host-bridge information when parsing and generating Multikernel device trees. A spawned kernel
needs the PCI segment, bus range, and ECAM base to discover and access its assigned SR-IOV VF.
This change:
This complements the Linux SR-IOV assignment work in multikernel/linux#4.