** Changed in: linux (Ubuntu Zesty)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1688114
Title:
arm64/ACPI support for SBSA watchdog
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Zesty:
Fix Committed
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.
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