Could you please confirm if PCIe MSI Interrupt support is available in the LSDK kernel for LS1043ARDB?
Yes, LSDK 2108 supports PCIe MSI interrupts.
See the Section 7.2.8 in LSDK 2108 User Guide:
https://docs.nxp.com/bundle/GUID-487B2E69-BB19-42CB-AC38-7EF18C0FE3AE/page/GUID-38B02850-872C-4567-8...
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