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4.6. 高级错误报告(AER)

4.6.1. 什么是 AER

高级错误报告 (AER)是一个内核功能，为 Peripheral Component Interconnect Express (PCIe)设备提供增强的错误报告功能。AER 内核驱动程序附加支持 PCIe AER 功能的 root 端口，以便：

  • 在发生错误时收集全面的错误信息
  • 向用户报告错误
  • 执行错误恢复操作

例 4.1. AER 输出示例

Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0: AER: Corrected error received: id=ae00
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0: AER: Multiple Corrected error received: id=ae00
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=0000(Receiver ID)
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0:   device [8086:2030] error status/mask=000000c0/00002000
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0:    [ 6] Bad TLP
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0:    [ 7] Bad DLLP
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0: AER: Multiple Corrected error received: id=ae00
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=0000(Receiver ID)
Feb  5 15:41:33 hostname kernel: pcieport 10003:00:00.0:   device [8086:2030] error status/mask=00000040/00002000

当 AER 捕获错误时，它会向控制台发送错误消息。如果错误可被修复，则控制台输出会发出警告。