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Chapter 4. BIOS Configuration Settings
CPU Common
Options
Platform First Error
Handling
Auto
Enable
Disable
Core Performance
Boost
Auto
Enable
Disable
Global C-state
Control
Auto
Enable
Disable
Power Supply Idle
Control
Auto
Low Current Idle
Typical Current Idle
SEV ASID Count
Auto
253 ASIDs
509 ASIDs
SEV-ES ASID Space
Limit Control
Auto
Manual
Streaming Stores
Control
Auto
Enable
Disable
Local APIC Mode
Auto
xAPIC
x2APIC
ACPI _CST C1
Declaration
Auto
Enable
Disable
MCA error thresh
enable
Auto
True
False
SMU and PSP Debug
Mode
Auto
Enable
Disable
Xtrig7 Workaround
Auto
No Workaround Bronze
Workaround
Silver
Workaround
PPIN Opt-in
Auto
Enable
Disable
SNP Memory (RMP
Table) Coverage
Auto
Enable
Disable
Custom
SMEE
Auto
Enable
Disable
Action on BIST
Failure
Auto
Do nothing
Down-CCD
Fast Short REP
MOVSB
Enable
Disable
Enhanced REP
MOVSB/STOSB
Enable
Disable
REP-MOV/STOS
Streaming
Enable
Disable
X3D
Auto
Disable
1 stack
2 stacks
3 stacks
IBS hardware
workaround
Auto
Enable
DF Common Options
Scrubber
DRAM Scrub
time
Auto
1 hour
4 hours
8 hours
Disable
16 hours
24 hours
48 hours
Poison
scrubber
control
Auto
Enable
Disable
Redirect
scrubber
control
Auto
Enable
Disable
Redirect
scrubber limit Auto
Infinite 2
4
8
Memory Addressing
NUMA nodes
per socket
Auto
NPS2
NPS4
Memory
interleaving
Auto
Disable
Memory
interleaving
size
Auto
256
Bytes
512
Bytes
1 KB
2 KB
1TB remap
Auto
Do not remap Attempt to
remap
DRAM map
inversion
Auto
Enable
Disable
Location of
private memory
regions
Auto
Distributed Consolidated
Consolidated
to 1st DRAM
pair