UEFI RAS events

UEFI CPER events

The UEFI BIOS spec defines Common Platform Error Record (CPER) for the firmware to report errors from different kinds of hardware.

There are several types of CPER events for different types of hardware:

1. CPU:

   • N.2.4: Processor

     Currently, UEFI 2.6+ BIOS supports 4 types of processors:

     • Generic Processor;
     • IA32/X64 processor (x86 architecture);
     • IA64 processor (Itanium);
     • ARM processor.

     Each processor type has a different error event.

     It be noticed that, while ARM was added on UEFI v 2.6, the encoding of the error type was only specified on UEFI 2.9A errata.

2. Memory:

   • N.2.5: Memory error
   • N.2.6: Memory error 2

3. PCI/PCIe:

   • N.2.7: PCI express
   • N.2.8: PCI/PCI-X bus
   • N.2.9: PCI/PCI-X component

4. Firmware:

   • N2.10: Firmware

5. DMA:

   • N2.11: DMA

6. Cache Coherent Interconnect (CCIX):

   • N2.12: CCIX PER log.

7. Compute Express Link

   • N2.13: Compute Express Link (CXL) protocol.

8. Others:

   • N.2.3: Non-standard.