The VSEC capability register (described in Table: VSEC Capability Register 2 ) allows the memory space for the core to appear as though it is a part of the underlying integrated block PCIe configuration space. The VSEC is inserted immediately following the last enhanced capability structure in the underlying block. VSEC is defined in §7.18 of the PCI Express Base Specification, v1.1 (§7.19 of v2.0) [Ref 8] .
This register is only included if C_INCLUDE_BAR_OFFSET_REG = 1.