Hi, QDT is working with PCI-SIG to revisit some of the spec language ambiguity on the definition of PCI Segment Group in PCI FW Specification. PCI spec is currently requiring a single entry per segment in the MCFG table with a contiguous 256MB range. Based on our research, this rule is being violated in the industry for existing platforms due to the different ways spec is interpreted. We are trying to remove this restriction in the spec and have multiple entries per segment as long as <segment, bus start number, bus end number> tuple is unique. AFAIS, generic ACPI Linux driver already supports this via pci_mcfg_lookup(). I also did a prototype and observed that I can enumerate two root ports without any issues. I wanted to seek opinion on whether this is a valid assumption and if I'm missing something. Sinan -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
