Public bug reported:
[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.
** Affects: linux (Ubuntu)
Importance: High
Assignee: dann frazier (dannf)
Status: In Progress
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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
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1688114/+subscriptions
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