Introduction

This plugin reads the sysfs attributes associated with CPU microcode. It displays a read-only value of the CPU microcode version loaded onto the physical CPU at fwupd startup.

GUID Generation

These devices add extra instance IDs from the CPUID values, e.g.

• CPUID\PRO_0&FAM_06 (only-quirk)
• CPUID\PRO_0&FAM_06&MOD_0E
• CPUID\PRO_0&FAM_06&MOD_0E&STP_3

Quirk Use

This plugin uses the following plugin-specific quirks:

CpuMitigationsRequired

Mitigations required for this specific CPU. Valid values are:

• gds

Since: 1.9.4

• sinkclose

Since: 2.0.2

CpuSinkcloseMicrocodeVersion

Minimum version of microcode to mitigate the sinkclose vulnerability.

Since: 2.0.2

External Interface Access

This plugin requires no extra access.

Version Considerations

This plugin has been available since fwupd version 1.4.0.