TYAN TS75-B7122 Service Engineer's Manual page 146

5.3.11.5.3 Intel® VT for Directed I/O (VT-d)
®
Intel VT for Directed I/O (VT-d)
Enable/Disable Intel
the I/O device assignment to VMM through DMAR ACPI Tables.
DMA Control Opt-In Flag
Enable/Disable DMA_CTRL_FLATFORM_OPT_ IN_FLAG in DMAR table in ACPI.
Not compatible with Direct Device Assignment (DDA).
Interrupt Remapping
Enable/Disable VT_D Interrupt Remapping Support
X2APIC Opt Out
Enable/Disable x2APIC_OPT_OUT bit
Pre-boot DMA Protection
Enable DMA Protection in Pre-boot environment (If DMAR table is installed in DXE
and If VTD_INFO_PPT is installed in PEI.)
@
Virtualization Technology for Directed I/O (VT-d) by reporting
Disabled / Enabled
Enabled / Disabled
Auto / Enabled / Disabled
Enabled / Disabled
Enabled / Disabled
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