Supermicro X13DAI-T User Manual page 116

Super X13DAI-T User's Manual
Intel VT for Directed I/O (VT-d)
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Intel VT for Directed I/O (VT-d)
Select Enable to use Intel Virtualization Technology for Direct I/O VT-d support by
reporting the I/O device assignments to the Virtual Machine Monitor (VMM) 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. (DMA is the abbreviation for Direct
Memory Access. DMAR is the abbreviation for DMA Remapping Reporting.)
Pre-boot DMA Protection (Available when "Intel VT for Directed I/O (VT-d)" is
set to Enable)
Select Enable to establish DMA protection during pre-boot processing by setting
DMA_CTRL_PLATFORM_OPT_IN_FLAG in the DMAR ACPI table. The options are
Enable and Disable.
Interrupt Remapping (Available when "Intel VT for Directed I/O (VT-d)" is set to
Enable)
Select Enable to support I/O DMA transfer remapping and device-generated interrupts.
The options are Auto, Enable, and Disable.
PCIe ACSCTL (Available when "Intel VT for Directed I/O (VT-d)" is set to
Enable)
Select Enable to program ACS control to Chipset PCIe Root Port bridges. Select Dis-
able to program ACS control to all PCIe Root Port bridges. The options are Disable
and Enable.
Intel VMD Technology
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This section describes the configuration settings for the Intel VMD technology.
Note 1: After you've enabled VMD in the BIOS on a PCIe slot, this PCIe slot will be
dedicated for VMD use only, and it will no longer support any PCIe device. To re-activate
this slot for PCIe use, please disable VMD in the BIOS.
Note 2: The number of PCIe slots and the slot naming can differ depending on the
PCIe devices connected to your motherboard.
NVMe Mode Switch
When this feature is set to Auto, VMD support will be automatically enabled when a
VROC key is detected by the BIOS. The options are Manual, VMD, and Auto.
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