Dell E75S001 Reference Manual page 20

Table 22. System Security details (continued)
Option
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
User Defined Delay (60 s to 600
s)
20 Pre-operating system management applications
Description
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
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. The actual AC recovery time needs to add iDRAC root of
trust time (around 50 seconds).