User Manual

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Chapter 5: BIOS Setup
The following item appears only when SEV-ES ASID Space Limit Control is set to
[Manual].
SEV-ES ASID Space Limit [Auto]
SEV Vms using ASIDs below the SEV-ES ASID Space Limit must enable the SEV-ES
feature. ASIDs from SEV-ES ASID Space Limit to (SEV ASID Count + 1) can only be used
with SEV VMs. If this field is set to (SEV ASID Count + 1), all ASIDs are forced to be SEV-ES
ASIDs. Hence, the valid values for this field is 1 - (SEV ASID Count + 1).
Configuration options: [1] – [520]
Streaming Stores Control [Auto]
Allows you to enable or disable the streaming stores functionality.
Configuration options: [1] – [520]
Local APIC Mode [Auto]
Configuration options: [Compatibility] [XAPIC] [X2APIC] [Auto]
ACPI _CST C1 Operation [Auto]
Determines whether or not to declare the C1 state to the OS.
Configuration options: [Disabled] [Enabled] [Auto]
MCA error thresh enable [Auto]
Allows you to enable or disable MCA error thresholding.
Configuration options: [False] [True] [Auto]
The following item appears only when MCA error thresh enable is set to [True].
MCA error thresh count [FF5]
Allows you to set the effective error threshold count = 4095(0xFFF) - <this value> (e.g. the
default value of 0xFF5 results in a threshold of 10).
SMU and PSP Debug Mode [Auto]
When this option is set to [Enabled], specific uncorrected errors detected by the PSP FW or
SMU FW will hang and not reset the system.
Configuration options: [Disabled] [Enabled] [Auto]
Xtrig7 Workaround [Auto]
This workaround is only applicable for Rev A.
[Auto] The bronze workaround is applied.
[No Workaround] Applied for Rev B, and changing the selection for this option will
not result in any changes.
[Bronze Workaround] DbReq and PDM function as expected, breakpoint redirect
capability compromised.
[Silver Workaround] DbReq, PDM, and breakpoint redirect function as expected,
SCAN capability compromised.