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PCIe Port Link Status
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PCIe Port Link Max
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PCIe Port Link Speed
Data Link Feature Exchange
Use this feature to enable/disable the PCIe port to enter PCIe 4.0 DL_Feature negotiation
state. The options are Disable and Enable.
DMI Port MPSS
Use this feature to set the maximum payload size supported in Direct Media Interface
(DMI) device capabilities register for the device installed in the PCIe port. The options
are 128B, 256B, and Auto.
Equalization Bypass To Highest Rate
Set this feature to Enable to reduce the link training time for PCIe 5.0 device by skipping
equalization of intermediate data rates. The options are Disable and Enable.
IOAT Configuration
Relaxed Ordering
Select Yes to allow certain transactions to be processed and completed before other
transactions that have already been enqueued. The options are No and Yes.
Intel VT for Directed I/O (VT-d)
Intel VT for Directed I/O (VT-d)
Select Enable to use Intel Virtualization Technology for Direct I/O VT-d support by
reporting the I/O device assignments to the Virtual Machine Monitor (VMM) through the
DMAR ACPI tables. This feature offers fully-protected I/O resource sharing across Intel
platforms, providing greater reliability, security and availability in networking and data-
sharing. The options are Enable and Disable.
Opt-Out Illegal MSI Mitigation
Select Enable to enable Opt-Out Illegal Mitigation. The options are Disable and Enable.
Pre-boot DMA (Direct Memory Access) Protection
Select Enable to enable DMA protection support in the pre-boot environment, which is
available when the DMAR table is installed in the DXE (Driver Execution Environment),
and the VID_INF0_PPI is installed in PEI. The options are Enable and Disable.
Interrupt Remapping (Available when "Intel VT for Directed I/O (VT-d)" is set to
Enable)
Select Enable to support I/O DMA transfer remapping and device-generated interrupts.
The options are Auto, Enable, and Disable.
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Chapter 4: UEFI BIOS
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