Chapter 4: UEFI BIOS
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Hardware PM State Control
Hardware P-States
This feature controls how P-States are selected. The
Disabled
option bases the choice
on OS Request. The Native Mode/Native Mode with No Legacy Support option bases the
choice on OS guidance. The "Out of Band Mode" option enables autonomous P-State
selection.
CPU C State Control
Autonomous Core C-State
This feature enables Autonomous Core C-State support. The options are
Disabled
and
Enabled.
CPU C6 report
This feature enables CPU C6 (ACPI C3) reporting to the operating system. The options
are Disabled, Enabled, and
Auto
.
Enhanced Halt State (C1E)
This feature enables Enhanced Halt State (takes effect after reboot). The options are
Disabled and
Enabled
.
Package C State Control
Package C State
This feature controls the Package C State limit. The options are C0/C1 state, C2 state, C6
(non Retention) state, C6 (Retention) state, No Limit, and
Auto
.
