Technical Product Specification

Table Of Contents
Intel
®
Server Board S5400SF TPS Server Management
Revision 2.02
Intel order number: D92944-007
57
4.4.5 Secure Mode and Front Panel Lock-out Operation
The secure mode feature allows the front panel buttons to be protected against unauthorized
use or access. The secure mode is enabled and controlled via the Set Secure Mode Options
command.
When secure mode is enabled and active and a protected front panel button is pressed, a
Secure Mode Violation event is generated – specifically asserting the Secure Mode Violation
Attempt offset (00h) of the Integrated BMC’s Security Violation Attempt sensor. The secure
mode state is cleared by the following:
Whenever AC power or system power is applied
When a system reset occurs
When a Integrated BMC reset occurs
The secure mode state includes the bits that specify the actions that are to be taken when the
secure mode is active, and the Force Secure Mode On bit.
The Set Secure Mode Options command allows specific front panel buttons to be protected
regardless of the secure mode state. This protection includes blocking the buttons and
generating secure mode violation events if one of the buttons is pressed when in the secure
mode state. See the command definition for details. Support is available only for protecting the
front panel power and reset buttons as a unit; these buttons cannot be individually locked.
The set of buttons that is protected when Secure Mode is active varies, depending on the
system ACPI power state.
Table 22. Secure Mode vs. ACPI State
ACPI
State
Power Button Reset Button Diagnostic Interrupt Button
(Front Panel NMI)
ID Button
S0 Protected Protected Unprotected Unprotected
S1 Unprotected Unprotected Unprotected Unprotected
S4/S5 Unprotected Unprotected Unprotected Unprotected