Supermicro X11QPL User Manual page 97

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
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
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 Technology

Use this feature to configure Intel Volume Management Device (VMD) Technology settings.
Note: After you've enabled VMD in the BIOS on a PCI-E slot of your choice, this PCI-E
slot will be dedicated for VMD use only, and it will no longer support any PCI-E device.
To re-activate this slot for PCI-E use, please disable VMD in the BIOS.
Intel® VMD for Volume Management Device on CPU1 - Intel® VMD for

Volume Management Device on CPU4
VMD Configuration for PStack0 - VMD Configuration for PStack2
Intel®VMD for Volume Management Device for PStack0 - PStack2
Select Enable to enable Intel Volume Management Device Technology support for the
for the device specified by the user. The options are Disable and Enable.
IIO-PCIE Express Global Options

IIO-PCIE Express Global Options
The section allows the user to configure the following PCI-E global options:
PCE-E Hot Plug
Select Enable to support Hot-plugging for the selected PCI-E slots which will allow the user
to replace the devices installed in the slots without shutting down the system. The options
are Disable, Enable, Auto, and Manual.
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Chapter 4: UEFI BIOS