BIOS IO Menu
Selections
This section includes
a searchable text-based representation and a screenshot of the BIOS
IO Menu. The options that are available from the IO Menu are described
in the table that follows.
Note - PCIe slot 1 and Ethernet ports NET2 and NET3 are nonfunctional
in single-processor systems.
The following tables 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 62 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 63 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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Enabled
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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 64 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/OATdevices.
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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 Internal Devices Options.
Table 65 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
Note -
Ethernet ports NET2 and NET3 are nonfunctional in single-processor systems.
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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 66 BIOS IO Menu Add In Cards
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Slot 1
Note -
PCIe slot 1 is nonfunctional in single-processor systems.
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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, and Slot 4
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See Slot 1 description
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