Dell PowerEdge T550 EMC BIOS and UEFI Reference Guide - Page 19

Table 22. System Security details (continued) Option Description Memory Encryption Enables or disables the Intel Total Memory Encryption (TME). When option is set to Disabled, BIOS disables both TME and MK-TME technology. When option is set to Enabled, BIOS enables the TME technology. This option is set to Disabled by default. Intel(R) SGX Enables you to set the Intel Software Guard Extension (SGX) option. To enable the Intel SGX option, processor must be SGX capable, memory population must be compatible (minimum x8 identical DIMM1 to DIMM8 per CPU socket), memory operating mode must be set at optimizer mode, memory encryption must be enabled and node interleaving must be disabled. This option is set to Off by default. When this option is to Off, BIOS disables the SGX technology. When this option is to On, BIOS enables the SGX technology. SGX Package Info In-Band Access Enables you to access the Intel Software Guard Extension (SGX) package info in-band option. This option is set to Off by default. PPMRR Size Sets the PPMRR size. SGX QoS Enables or disables the SGX quality of service. Select Owner EPOCH input type Enables you to select Change to New random Owner EPOCHs or Manual User Defined Owner EPOCHs. Each EPOCH is 64-bit. After generating new EPOCH by selecting Change to New random Owner EPOCHs, the selection reverts back to Manual User Defined Owner EPOCHs. Software Guard Extensions Epoch n: Sets the Software Guard Extensions Epoch values. Enable writes to SGXLEPUBKEYHASH[3:0] from OS/SW Enables or disables the Enable writes to SGXLEPUBKEYHASH[3:0] from OS/SW. SGX LE Public Key Hash0: Sets the bytes from 0-7 for SGX Launch Enclave Public Key Hash. SGX LE Public Key Hash1: Sets the bytes from 8-15 for SGX Launch Enclave Public Key Hash. SGX LE Public Key Hash2: Sets the bytes from 16-23 for SGX Launch Enclave Public Key Hash. SGX LE Public Key Hash3: Sets the bytes from 24-31 for SGX Launch Enclave Public Key Hash. Enable/Disable SGX Auto MP Registration Agent Enables are disables the SGX Auto MP Registration. The MP registration agent is responsible to register the platform. SGX Factory Reset Enables you to reset the SGX option to factory settings. 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. NOTE: The host system will not power on up until iDRAC Root of Trust (RoT) is completed, host power on will be delayed by minimum 90 seconds after the AC applied. AC Power Recovery Delay User Defined Delay (60 s to 600 s) UEFI Variable Access 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. When this option is set to Immediate, there is no delay for power up. When this option is set to Random, the system creates a random delay for power up. When this option is set to User Defined, the system delay time is manually to power up. Sets the User Defined Delay option when the User Defined option for AC Power Recovery Delay is selected. Provides varying degrees of securing UEFI variables. When set to Standard (the default), UEFI variables are accessible in the operating system per the UEFI Pre-operating system management applications 19