Intel S5520HCT Product Specification - Page 67

Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS Functional Architecture 3.13.2.1 Physical Presence Administrative operations to the TPM require TPM ownership or physical presence indication by the operator to confirm the execution of administrative operations. The BIOS implements the 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. The BIOS executes TPM administrative command(s), inhibits BIOS Setup entry and boots directly to the operating system which requested the TPM command(s). 3.13.2.2 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. 3.13.2.3 Security Screen The Security screen provides fields 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 S5520HCT provides TPM settings through the security screen. To access this screen from the Main screen, select the Security option. Revision 1.8 53 Intel order number E39529-013