ADLINK aTCA-6250 - Manual (Page 73)

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IOU3 – PCIe Port
IOU3 provides a x16 link to PCIe device.
PORT 3A Link Speed
Port 3A is designed to link onboard PCIe x16 device. This item is for configuring the
link speed to x16 device.
Intel(R) VT-d
This item allows user to enable or disable Intel ® VT for directed I/O (VT-d) which
provides additional hardware support for managing I/O virtualization.
Coherency Support
It allows user to enable or disable Non-Isoch VT-d Engine Coherency support.
ATS Support
It allows user to enable or disable Non-Isoch VT-d Engine Address Translation
Services (ATS) support.