Dell XPS 13 9305 Service Manual - Page 68

Power, Intel Speed Shift Technology, Security, TPM 2.0 Security On, SMM Security Mitigation

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Table 11. System setup options-Power menu (continued) Power Intel Speed Shift Technology Enables or disables the Intel Speed Shift Technology support. Setting this option to enable allows the operating system to select the appropriate processor performance automatically. Default: ON Table 12. System setup options-Security menu Security TPM 2.0 Security On PPI Bypass for Enable Commands Enables or disables the OS to skip BIOS Physical Presence Interface (PPI) user prompts when issuing TPM PPI enabled and activate commands. Default: OFF PPI Bypass for Disable Commands Enables or disables The OS to skip BIOS PPI user prompts when issuing TPM PPI Disable and Deactivate commands. Default: OFF TPM 2.0 Security On Select whether or not the Trusted Platform Model (TPM) is visible to the OS. Default: ON Attestation Enable Enables to control whether the TPM Endorsement Hierarchy is available to the OS. Disabling this setting restricts the ability to use the TPM for signature operations. Default: ON Key Storage Enable Enables to control whether the TPM Endorsement Hierarchy is available to the OS. Disabling this setting restricts the ability to use the TPM for storing owner data. Default: ON SHA-256 Enables or disables the BIOS and the TPM to use the SHA-256 hash algorithm to extend measurements into the TPM PCRs during BIOS boot. Default: ON Clear Enables or disables the computer to clear the PTT owner information, and returns the PTT to the default state. Default: OFF PPI Bypass for Clear Commands Enables or disables the operating system to skip BIOS Physical Presence Interface (PPI) user prompts when issuing the Clear command. Default: OFF TPM State Enables or disables the TPM. This is the normal operating state for the TPM when you want to use its complete array of capabilities. Default: Enabled SMM Security Mitigation SMM Security Mitigation Enables or disables additional UEFI SMM Security Mitigation protections. Default: OFF NOTE: This feature may cause compatibility issues or loss of functionality with some legacy tools and applications. Data Wipe on Next Boot 68 System setup

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Table 11. System setup options—Power menu (continued)
Power
Intel Speed Shift Technology
Enables or disables the Intel Speed Shift Technology support. Setting this option
to enable allows the operating system to select the appropriate processor
performance automatically.
Default: ON
Table 12. System setup options—Security menu
Security
TPM 2.0 Security On
PPI Bypass for Enable Commands
Enables or disables the OS to skip BIOS Physical Presence Interface (PPI) user
prompts when issuing TPM PPI enabled and activate commands.
Default: OFF
PPI Bypass for Disable Commands
Enables or disables The OS to skip BIOS PPI user prompts when issuing TPM PPI
Disable and Deactivate commands.
Default: OFF
TPM 2.0 Security On
Select whether or not the Trusted Platform Model (TPM) is visible to the OS.
Default: ON
Attestation Enable
Enables to control whether the TPM Endorsement Hierarchy is available to the
OS. Disabling this setting restricts the ability to use the TPM for signature
operations.
Default: ON
Key Storage Enable
Enables to control whether the TPM Endorsement Hierarchy is available to the
OS. Disabling this setting restricts the ability to use the TPM for storing owner
data.
Default: ON
SHA-256
Enables or disables the BIOS and the TPM to use the SHA-256 hash algorithm to
extend measurements into the TPM PCRs during BIOS boot.
Default: ON
Clear
Enables or disables the computer to clear the PTT owner information, and
returns the PTT to the default state.
Default: OFF
PPI Bypass for Clear Commands
Enables or disables the operating system to skip BIOS Physical Presence
Interface (PPI) user prompts when issuing the Clear command.
Default: OFF
TPM State
Enables or disables the TPM. This is the normal operating state for the TPM
when you want to use its complete array of capabilities.
Default: Enabled
SMM Security Mitigation
SMM Security Mitigation
Enables or disables additional UEFI SMM Security Mitigation protections.
Default: OFF
NOTE:
This feature may cause compatibility issues or loss of functionality
with some legacy tools and applications.
Data Wipe on Next Boot
68
System setup