Chapter 4: AMI BIOS
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Intel VT for Directed I/O (VT-d)
Intel
®
VT for Directed I/O (VT-d)
Select Enable to enable Intel Virtualization Technology support for Direct I/O
VT-d 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 to support Interrupt Remapping to enhance system performance.
The options are Enable and Disable.
PCI Express Global Options
Power Down Unused Ports
Select Enable to power down the ports that are conneced. The options are
Disable, Enable, HSX Disable Unused Ports (No IIO Clock Gating), and HSX
Disable Unused Ports (IIO Clock Gating).
QPI (Quick Path Interconnect) Conguration
QPI Status
The following information will display:
• Number of CPU
• Number of IIO
• Link Speed
• Current QPI Link Frequency
• QPI Global MMIO Low Base/Limit
• QPI Global MMIO High Base/Limit
• QPI PCI-E Conguration Base/Siz (Size)
Link Frequency Select
Use this feature to select the desired frequency for QPI Link connections. The
options are 6.4GB/s, 7.2GB/s, 8.0GB/s, 9.6BG/s, Auto, Auto Limited, and Use
Per Link Setting.
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