Dell E45S003 Manuel de référence - Page 8
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Table 5. Processor Settings details (continued)
Option
Secured Nested Paging (SNP)
SNP Memory Coverage
Transparent Secure Memory Encryption (TSME)
Enhanced REP MOVSB/STOSB
Fast Short REP MOVSB
REP-MOV/STOS Streaming
Configurable TDP
x2APIC Mode
Number of CCDs per Processor
8
Pre-operating system management applications
Description
Enables or disables SEV-SNP, a set of additional security
protections. This option is set to Disabled by default.
NOTE:
This option is only available for 3rd Generation
AMD EPYC processors.
This option selects the operating mode of the Nested Paging
(SNP) Memory and the reverse Map Table(RMP). The RMP
is used to ensure a one-to-one mapping between system
physical addresses and guest physical addresses.
NOTE:
This option is only available for 3rd Generation
AMD EPYC processors.
Enables or disables the TSME. TSME is always-on memory
encryption that does not require OS or hypervisor support.
This option is set to Disabled by default.
● If the OS supports SME, do not enable this field.
● If the hypervisor supports SEV, do not enable this field.
Enabling
TSME affects the system memory performance.
Enables or disables Enhanced REP MOVSB/STOSB support.
This setting can affect performance, depending on the
application running on the server. This option is set to
Disabled by default.
NOTE:
This option is only available for the AMD EPYC
7003 processor.
Enables or disables Fast Short REP MOVSB support. This
setting can affect performance, depending on the application
running on the server. This option is set to Disabled by
default.
NOTE:
This option is only available for the AMD EPYC
7003 processor.
Enables or disables REP MOVISTOS Streaming support. This
setting can affect performance, depending on the application
running on the server. This option is set to Disabled by
default.
NOTE:
This option is only available for the AMD EPYC
7003 processor.
Allows the reconfiguration of the processor Thermal Design
Power (TDP) levels based on the power and thermal delivery
capabilities of the system. TDP refers to the maximum amount
of power the cooling system is required to dissipate. This
option is set to Maximum by default.
NOTE:
This option is only available on certain SKUs of the
processors, and the number of alternative levels varies as
well.
Enables or disables x2APIC mode. This option is set to
Enabled by default.
NOTE:
For two CPU 64 cores configuration, x2APIC
mode is not switchable if 256 threads are enabled (BIOS
settings: All CCD, cores, and logical processors enabled).
Controls the number of enabled CCDs in each processor. This
option is set to All by default.