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What: /sys/kernel/debug/aest/<name>.<id>/
Date: Dec 2025
KernelVersion: 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
Directory represented a AEST device, <name> means device type,
like:
- processor
- memory
- smmu
- ...
<id> is the unique ID for this device.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/*
Date: Dec 2025
KernelVersion: 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
Attibute for aest node which belong this device, the format
of node name is: <Node Type>-<Node Address>
See more at:
https://developer.arm.com/documentation/den0085/latest/
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/ce_threshold
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(WO) Write the ce threshold to all records of this node. Failed
if input exceeded the maximum threshold
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/err_count
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(RO) Outputs error statistics for all error records of this node.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/err_*
Date: Dec 2025
KernelVersion: 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(RO) Read err_* register and return val.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/ce_threshold
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(RW) Read and write the ce threshold to this record. Failed
if input exceeded the maximum threshold
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/err_count
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(RO) Outputs error statistics for all this records.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/inject/err_*
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(RW) These registers are used to simulate soft injection errors
by holding error register values. You can write any values
to them. To trigger the injection, you need to write soft_inject
at last. The validity of the injected error depends on the
value written to err_status.
Accepts values - any.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/inject/soft_inject
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(WO) Write any value to this file to trigger the error
injection. Make sure you have specified all necessary error
parameters, i.e. this write should be the last step when
injecting errors.
Accepts values - any.
What: /sys/kernel/debug/aest/<name>.<id>/<node_name>/record<index>/inject/hard_inject
Date: Dec 2025
KernelVersion 6.19
Contact: Ruidong Tian <tianruidong@linux.alibaba.com>
Description:
(WO) If the AEST table provides error injection registers,
you can write to them via this interface. For instance,
values can be written to the ERXPFGCTL register. The post-injection
behavior is then determined by the hardware specification.
Accepts values - any.