Chapter 7: BIOS
7-13
Intel VT for Directed I/O (VT-d)
Intel
®
VT for Directed I/O (VT-d)
Select Enable to use Intel Virtualization Technology support 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
availability 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) Confi guration
QPI Status
The following information will display:
• Number of CPU
• Number of IIO
• Current QPI Link Speed
• Current QPI Link Frequency
• QPI Global MMIO Low Base/Limit
• QPI Global MMIO High Base/Limit
• QPI PCIe Confi guration Base/Size
Link Frequency Select
Use this feature to select the desired QPI link frequency. The options are 6.4
GT/s, 8.0 GT/s, 9.6 GT/s, Auto, and Auto Limited.
Link L0p Enable
Select Enable for the QPI to enter the L0p state for power saving. The options
are Disable and Enable.
Link L1 Enable
Select Enable for the QPI to enter the L1 state for power saving. The options
are Disable and Enable.
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