config NTB tristate "Intel Non-Transparent Bridge support" depends on PCI depends on X86_64 help The PCI-E Non-transparent bridge hardware is a point-to-point PCI-E bus connecting 2 systems. When configured, writes to the device's PCI mapped memory will be mirrored to a buffer on the remote system. The ntb Linux driver uses this point-to-point communication as a method to transfer data from one system to the other. If unsure, say N.