arm64/ACPI support for SBSA watchdog
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
High
|
dann frazier | ||
Zesty |
Fix Released
|
High
|
dann frazier |
Bug Description
[Impact]
On arm64/ACPI-based servers, such as the QDT2400 and HiSilicon D05, there is a watchdog feature based on the architected timer that is not usable in Ubuntu. This prevents these systems from using this facility to automatically recover from a hard lockup.
[Test Case]
sudo modprobe sbsa-gwdt
ls -l /dev/watchdog*
[Regression Risk]
The changes required are to the ARM architected timer driver and some new code to parse the configuration data from the ACPI GTDT table. These changes only apply to ARM-specific code, so the risk is limited to those platforms.
This has been tested on the QDT2400 and HiSilicon D05, and regression tested on an non-ACPI (devicetree) HP m400 and Cavium ThunderX systems.
Changed in linux (Ubuntu Zesty): | |
status: | New → In Progress |
importance: | Undecided → High |
assignee: | nobody → dann frazier (dannf) |
Changed in linux (Ubuntu Zesty): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Zesty): | |
status: | Fix Committed → Fix Released |
This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- zesty' to 'verification- done-zesty' . If the problem still exists, change the tag 'verification- needed- zesty' to 'verification- failed- zesty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!