Supermicro X11DPT-BR User Manual page 86

Super X11DPT-BR 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 support for Direct I/O VT-d by reporting
the I/O device assignments to the VMM (Virtual Machine Monitor) 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.
ACS (Access Control Services) Control
Select Enable to program ACS control to Chipset PCIe Root Port bridges. Select Disable to
program ACS control to all PCIe Root Port bridges. The options are Enable and Disable.
Interrupt Remapping
If this feature is set to Enable, I/O DMA transfer remapping and device-generated interrupts
will be supported. The options are Enable and Disable.
PassThrough DMA
Select Enable for the Non-Isoch VT-d engine to pass through DMA (Direct Memory Access)
to enhance system performance. The options are Enable and Disable.
ATS (Address Translation Services)
Select Enable to enable ATS support for the Non-Isoch VT-d engine to enhance system
performance. The options are Enable and Disable.
Posted Interrupt
Select Enable to support VT_D Posted Interrupt which will allow external interrupts to be
sent directly from a direct-assigned device to a client machine in non-root mode to improve
virtualization efficiency by simplifying interrupt migration and lessening the need of physical
interrupts. The options are Enable and Disable.
Coherency Support (Non-Isoch)
Select Enable for the Non-Isoch VT-d engine to pass through DMA (Direct Memory Access)
to enhance system performance. The options are Enable and Disable.
Intel® VMD (Volume Management Device) 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 of your choice, 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. PCIe slots and naming can differ depending on the PCIe devices installed on
your motherboard.
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