Chapter 4: BIOS
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Number of Stop Grant Cycles
This feature allows you to select the number of Stop-Grant cycles. The default setting is 1.
VT-d
Select Enabled to activate Intel Virtualization Technology support for Direct I/O VT-d by
reporting the I/O device assignments to VMM through the DMAR ACPI Tables. This feature
oers fully-protected I/O resource-sharing across the Intel platforms with greater reliability,
security and availability in networking and data-sharing. The options are Disabled and
Enabled.
X2APIC Opt Out
Use this feature to enable or disable X2APIC_OPT_Out bit. The options are Enabled and
Disabled.
DMA Control Guarantee
Use this feature to enable or disable DMA_Control_Guarantee bit. The options are Enabled
and Disabled.
IGD VTD Enable
Use this feature to enable or disable IGD VTD. The options are Enabled and Disabled.
IOP VTD Enable
Use this feature to enable or disable IOP VTD. The options are Enabled and Disabled.
Thermal Device (B0:D4:F0)
Use this feature to enable or disable SA thermal device. Always enable for ICL A0 stepping.
The options are Enabled and Disabled.
GNA Device (B0:D8:F0)
Use this feature to enable or disable SA GNA device. The options are Enabled and
Disabled.
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