Technical Product Specification

Functional Architecture Intel® Server Board S5520UR and S5520URT TPS
Intel order number E44031-012 Revision 1.9
40
operator presence indication by verifying the setup Administrator password.
A TPM administrative sequence invoked from the operating system proceeds as follows:
1. User makes a TPM administrative request through the operating system’s security software.
2. The operating system requests the BIOS to execute the TPM administrative command
through TPM ACPI methods and then resets the system.
3.
The BIOS verifies the physical presence and confirms the command with the operator.
4. T
he BIOS executes TPM administrative command(s), inhibits BIOS Setup entry and boots
directly to the operating system which requested the TPM command(s).
3.9.2.2 TPM Security Setup Options
The BIOS TPM Setup allows the operator to view the current TPM state and to carry out
rudimentary TPM administrative operations. Performing TPM administrative options through the
BIOS setup requires TPM physical presence verification.
Using BIOS TPM Setup, the operator can turn ON or OFF TPM functionality and clear the TPM
ownership contents. After the requested TPM BIOS Setup operation is carried out, the option
reverts to No Operation.
The BIOS TPM Setup also displays the current state of the TPM, whether TPM is enabled or
disabled and activated or deactivated. Note that while using TPM, a TPM-enabled operating
system or application may change the TPM state independent of the BIOS setup. When an
operating system modifies the TPM state, the BIOS Setup displays the updated TPM state.
The BIOS Setup TPM Clear option allows the operator to clear the TPM ownership key and
allows the operator to take control of the system with TPM. You use this option to clear security
settings for a newly initialized system or to clear a system for which the TPM ownership security
key was lost.
3.9.2.3 Security Screen
To enter the BIOS Setup, press the F2 function key during boot time when the OEM or Intel
®
logo displays. The following message displays on the diagnostics screen and under the Quiet
Boot logo screen:
Press <F2> to enter setup
When the Setup is entered, the Main screen displays. The BIOS Setup utility provides the
Security screen to enable and set the user and administrative passwords and to lock out the
front panel buttons so they cannot be used. The Intel
®
Server Board S5520URT provides TPM
settings through the security screen.
To access this screen from the Main screen, select the Security option.