BIOS IO Menu Selections
This section includes a screenshot of the BIOS IO Menu. The options that are available
from the IO Menu are described in the sections that follow.
The following sections describe the BIOS IO Menu options.
BIOS IO Menu PCI Subsystem Settings Options
The following table describes the BIOS IO Menu PCI subsystem settings options.
Table 29 BIOS IO Menu PCI Subsystem Settings Options
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PCI 64 Bit Resources Allocation
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Disabled/Enabled
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Enabled
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Enable or disable 64-bit capable devices to be decoded in above 4G
address space. This setting is available only if the system supports
64-bit decoding.
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BIOS IO Menu IO Virtualization Options
The following table describes the BIOS IO Menu IO virtualization options:
Table 30 BIOS IO Menu IO Virtualization Options
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VT-d
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Disabled/Enabled
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Enabled
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Enable or disable Intel Virtualization Technology for directed I/O
(VT-d) by reporting the I/O device assignment to VMM through DMA
remapping reporting (DMAR) Advance Configuration Power Interface (ACPI)
tables.
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SR-IOV
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Disabled/Enabled
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Enabled
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Single Root I/O Virtualization (SR-IOV) is used to configure devices
into multiple virtual devices that can be used on virtual OS
installations. If supported by the hardware and set to enabled, all
devices within the system that are SR-IOV capable are configured to
support SR-IOV and I/O resources are allocated to the device as normal.
If set to disabled, I/O resources are not allocated to the device.
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ARI
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Disabled/Enabled
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Disabled
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If Alternate Routing ID (ARI) is supported by the hardware and set to
enabled, devices are permitted to locate virtual functions (VFs) in
function numbers 8 to 255 of the captured bus number, instead of normal
function numbers 0 to 7.
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BIOS IO Menu I/OAT Configuration Options
The following table describes the BIOS IO Menu I/OAT configuration options:
Table 31 BIOS IO Menu I/OAT Configuration Options
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Intel I/OAT
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Disabled/Enabled
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Enabled
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Enable or disable Intel I/OAT.
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DCA Support
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Disabled/Enabled
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Enabled
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Enable or disable direct cache access (DCA) support.
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BIOS IO Menu Internal Devices Options
The following table describes the BIOS IO Menu internal devices options:
Table 32 BIOS IO Menu Internal Devices Options
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NET0
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Displays and provides options to change the internal device
settings.
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OpROM Enable
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Disabled/Enabled
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Enabled
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Enable or disable Option ROM. If set to enabled, Option ROM for the
card executes as normal. If set to disabled, Option ROM for the card is
not copied into memory and the execution of the Option ROM is
inhibited.
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NET1, NET2, and NET3
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See NET0 description.
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BIOS IO Menu Add In Cards Options
The following table describes the BIOS IO Menu add in cards options.
Table 33 BIOS IO Menu Add In Cards Options
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Slot 1
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Displays and provides options to change the settings of the devices in
PCIe slots.
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OpROM Enable
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Disable/Enabled
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Enabled
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Enable or disable Option ROM for add-in card.
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Slot 2, Slot 3, Slot 4, Slot 5, and Slot
6
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See Slot 1 description
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