Dell P175G Owner's Manual page 131

Table 47. System setup options—Preboot Behavior menu (continued)
Preboot Behavior
Sign of Life
Early Keyboard Backlight
Table 48. System setup options—Virtualization menu
Virtualization Support
Intel Virtualization Technology
Enable Intel Virtualization Technology (VT)
VT for Direct I/O
Enable Intel VT for Direct I/O
Intel Trusted Execution Technology
(TXT)
Enable Intel Trusted Execution Technology
(TXT)
DMA Protection
Enable Pre-Boot DMA Support
Enable OS Kernel DMA Support
Table 49. System setup options—Performance menu
Performance
Multi-Core Support
Keyboard Backlight Sign of Life.
By default, the Early Keyboard Backlight option is enabled.
When enabled, the computer can run a Virtual Machine Monitor (VMM).
By default, the Enable Intel Virtualization Technology (VT) option is enabled.
When enabled, the computer can perform Virtualization Technology for Direct
I/O (VT-d). VT-d is an Intel method that provides virtualization for memory map
I/O.
By default, the Enable Intel VT for Direct I/O option is enabled.
Allows you to Measured Virtual Machine Monitor (MVMM) to utilize the
additional hardware capabilities provided by Intel Trusted Execution Technology.
By default, the Enable Intel Trusted Execution Technology (TXT) option is
disbaled.
Allows you to control the Pre-Boot DMA protection for both internal and external
ports. This option does not directly enable DMA protection in the operating
system.
NOTE: This option is not available when the virtualization setting for IOMMU
is disabled (VT-d/AMD Vi).
By default, the Enable Pre-Boot DMA Support option is enabled.
For additional security, Dell Technologies recommends keeping the Enable Pre-
Boot DMA Support option enabled.
NOTE: This option is provided only for compatibility purposes, since some
older hardware is not DMA capable.
Allows you to control the Kernel DMA protection for both internal and external
ports. This option does not directly enable DMA protection in the operating
system. For operating systems that support DMA protection, this setting
indicates to the operating system that the BIOS supports the feature.
NOTE: This option is not available when the virtualization setting for IOMMU
is disabled (VT-d/AMD Vi).
By default, the Enable OS Kernel DMA Support option is enabled.
NOTE: This option is provided only for compatibility purposes, since some
older hardware is not DMA capable.
BIOS Setup 131