Supermicro X11DAC User Manual page 88

Super X11DAC User's Manual
Intel® VT for Directed I/O (VT-d)
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Intel® VT for Directed I/O (VT-d) (Available when Intel® VT for Directed I/O (VT-d)
is set to Enable)
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 (Available when Intel® VT for Directed I/O
(VT-d) is set to Enable)
Select Enable to program Access Control Services to Chipset PCIe Root Port Bridges.
Select Disable to program Access Control Services to all PCIe Root Port Bridges. The
options are Enable and Disable.
Interrupt Remapping (Available when Intel® VT for Directed I/O (VT-d) is set to
Enable)
Select Enable for Interrupt Remapping support to enhance system performance. The
options are Enable and Disable.
PassThrough DMA (Available when Intel® VT for Directed I/O (VT-d) is set to
Enable)
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 (Available when Intel® VT for Directed I/O (VT-d) is set to Enable)
Select Enable to enable ATS (Address Translation Services) support for the Non-Isoch VT-d
engine to enhance system performance. The options are Enable and Disable.
Posted Interrupt (Available when Intel® VT for Directed I/O (VT-d) is set to Enable)
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) (Available when Intel® VT for Directed I/O (VT-d)
is set to Enable)
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.
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