Dell E71S Manuale di riferimento - Pagina 20

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Table 22. System Security details (continued)

Option

Memory Encryption

Intel(R) SGX

SGX Package Info In-Band

Access

PPMRR Size

SGX QoS

Select Owner EPOCH input type

Enable writes to

SGXLEPUBKEYHASH[3:0] from

OS/SW

Enable/Disable SGX Auto MP

Registration Agent

SGX Factory Reset

Power Button

AC Power Recovery

AC Power Recovery Delay

Pre-operating system management applications

Description

Enables or disables the Intel Total Memory Encryption (TME) and Multi-Tenant (Intel

TME-MT). When option is set to Disabled, BIOS disables both TME and MK-TME

technology. When option is set to Single Key BIOS enables the TME technology. When

option is set to Multiple Keys, BIOS enables the TME-MT technology, the CPU Physical

Address Limit option must be disabled for selecting Multiple Keys option. This option is

set to Disabled by default.

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, not support on persistent

memory configuration), 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.

NOTE:

When upgrading from an earlier BIOS version to BIOS 1.7.4, the SGX feature

will be disabled. In the "SGX Factory Reset" menu in the "System Security" setup

menu, the user must first re-enable SGX with a factory reset.

Enables you to access the Intel Software Guard Extension (SGX) package info in-band

option. This option is set to Off by default.

Sets the PPMRR size.

Enables or disables the SGX quality of service.

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.

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.

Enables are disables the SGX Auto MP Registration. The MP registration agent is

responsible to register the platform.

Enables you to reset the SGX option to factory settings. This option is set to Off by

default.

Enables or disables the power button on the front of the system. This option is set to

Enabled by default.

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.

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