Dell XPS 13 9315 Service Manual page 54

Table 15. System setup options—Pre-boot Behavior menu (continued)
Pre-boot Behavior
Extend BIOS POST Time
MAC Address Pass-Through
Mouse/Touchpad
Sign of Life
Early Logo Display
Early Keyboard Backlight
Table 16. 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)
DMA Protection
Enable Pre-Boot DMA Support
54 System setup
Sets the BIOS POST (Power-On Self-Test) load time.
By default, the 0 seconds option is selected.
Replaces the external NIC MAC address (in a supported dock or dongle) with the
selected MAC address from the computer.
By default, the System Unique MAC Address option is selected.
Defines how the computer handles mouse and touchpad input.
By default, the Touchpad and PS/2 Mouse option is selected. Leaves the
integrated touchpad enabled when an external PS/2 mouse is present.
Display Logo Sign of Life.
By default, the Early Logo Display option is enabled.
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 system 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.
Specifies whether a measured Virtual Machine Monitor (MVMM) can use the
additional hardware capabilities provided by Intel Trusted Execution Technology.
The following must be enabled in order to enable Intel TXT -
● Trusted Platform Module (TPM)
● Intel Hyper-Threading
● All CPU cores (Multi-Core Support)
● Intel Virtualization Technology
● Intel VT for Direct I/O
By default, the Intel Trusted Execution Technology (TXT) option is disabled.
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.