PCI Express Port Bus support

modulename: pcieportdrv.ko

configname: CONFIG_PCIEPORTBUS

Linux Kernel Configuration
└─>Bus options (PCI etc.)
└─>PCI Express Port Bus support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This automatically enables PCI Express Port Bus support. Users can
choose Native Hot-Plug support, Advanced Error Reporting support,
Power Management Event support and Virtual Channel support to run
on PCI Express Ports (Root or Switch).

source code:
depends
CONFIG_PCI

is selected by
CONFIG_PCIEAER