User's Manual

PCI Configuration Parameters
DescriptionName
Whether to enable or disable memory mapped I/O of 64-bit PCI
devices to 4GB or greater address space. Legacy option ROMs
are not able to access addresses above 4GB. PCI devices that
are 64-bit compliant but use a legacy option ROM may not
function correctly with this setting enabled. This can be one of
the following:
• Disabled—The server does not map I/O of 64-bit PCI
devices to 4GB or greater address space.
• Enabled—The server maps I/O of 64-bit PCI devices to
4GB or greater address space.
MMIO Above 4GB
Allows you to set the level of ASPM (Active Power State
Management) support in the BIOS.This can be one of the
following:
• Disabled—ASPM support is disabled in the BIOS.
• Force L0s—Force all links to L0 standby (L0s) state.
• Auto—The CPU determines the power state.
ASPM Support
Allows you to set the priority for VGA graphics devices if
multiple VGA devices are found in the system. This can be one
of the following:
• Onboard—Priority is given to the onboard VGA device.
BIOS post screen and OS boot are driven through the
onboard VGA port.
• Offboard—Priority is given to the PCIE Graphics adapter.
BIOS post screen and OS boot are driven through the
external graphics adapter port.
• —Priority is given to the PCIE Graphics adapter, and the
onboard VGA device is disabled.
The vKVM does not function when the onboard
VGA is disabled.
Note
VGA Priority
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
196 OL-28893-01
BIOS Parameters by Server Model
Advanced BIOS Parameters for C22 and C24 Servers