Chapter 7: BIOS
7-19
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 VMM (Virtual Machine Monitor)
through the DMAR ACPI tables. This feature offers fully-protected I/O resource
sharing across Intel platforms, providing greater reliability, security and avail-
ability in networking and data-sharing. The options are
Enable
and Disable.
Interrupt Remapping
Select Enable for Interrupt Remapping support to enhance system performance.
The options are
Enable
and Disable.
QPI (Quick Path Interconnect) Configuration
QPI General Configuration
QPI Status
The following information will display:
•
Number of CPU
•
Number of II0
•
Current QPI Link Speed
•
Current QPI Link Frequency
•
QPI Global MMIO Low Base/Limit
•
QPI Global MMIO High Base/Limit
•
QPI PCIe Configuration Base/Size
Link Frequency Select
Use this item to select the desired frequency for QPI Link connections. The op-
tions are 6.4GB/s, 8.0GB/s, 9.6GB/s,
Auto,
and Auto Limited.
Link L0p Enable
Select Enable for Link L0p support to reduce power consumption. The options
are
Enable
and Disable.
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