Table 29. TPM information (continued)
Option
Description
TPM Advanced
Settings
This setting is enabled only when TPM Security is set to ON.
Table 30. TPM Advanced Settings Details information
Option
Description
TPM PPI Bypass
Provision
When set to
Enabled
allows the Operating System to bypass Physical Presence Interface (PPI).
TPM PPI Bypass
Clear
When set to
Enabled
allows the Operating System to bypass Physical Presence Interface (PPI).
TPM2 Algorithm
Selection
Enables you to select TPM2 Algorithm.
Table 31. System Security details
Option
Description
Intel(R) TXT
Enables you to set the Intel Trusted Execution Technology (TXT) option. To enable the
Intel
TXT
option, virtualization technology and TPM Security must be enabled with Pre-boot
measurements. This option is set to
Off
by default.
Power Button
Enables or disables the power button on the front of the system. This option is set to
Enabled
by default.
AC Power Recovery
Sets how the system behaves after AC power is restored to the system. This option is set to
Last
by default.
AC Power Recovery Delay
Sets the time delay for the system to power up after AC power is restored to the system. This
option is set to
Immediate
by default.
User Defined Delay (60 s to 600 s)
Sets the
User Defined Delay
option when the
User Defined
option for
AC Power Recovery
Delay
is selected.
UEFI Variable Access
Provides varying degrees of securing UEFI variables. When set to
Standard
(the default), UEFI
variables are accessible in the operating system per the UEFI specification. When set to
Controlled
, selected UEFI variables are protected in the environment and new UEFI boot
entries are forced to be at the end of the current boot order.
In-Band Manageability Interface
When set to
Disabled
, this setting hides the Management Engine's (ME), HECI devices, and
the system's IPMI devices from the operating system. This prevents the operating system from
changing the ME power capping settings, and blocks access to all in-band management tools.
All management should be managed through out-of-band. This option is set to
Enabled
by
default.
NOTE:
BIOS update requires HECI devices to be operational and DUP updates
require IPMI interface to be operational. This setting needs to be set to Enabled to
avoid updating errors.
Secure Boot
Enables Secure Boot, where the BIOS authenticates each pre-boot image by using the
certificates in the Secure Boot Policy. Secure Boot is set to
Disabled
by default.
Secure Boot Policy
When Secure Boot policy is set to
Standard
, the BIOS uses the system manufacturer’s key
and certificates to authenticate pre-boot images. When Secure Boot policy is set to
Custom
,
the BIOS uses the user-defined key and certificates. Secure Boot policy is set to
Standard
by
default.
Secure Boot Mode
Configures how the BIOS uses the Secure Boot Policy Objects (PK, KEK, db, dbx).
If the current mode is set to
Deployed Mode
, the available options are
User Mode
and
Deployed Mode
. If the current mode is set to
User Mode
, the available options are
User
Mode
,
Audit Mode
, and
Deployed Mode
.
Pre-operating system management applications
47
