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!


** Tags added: verification-needed-zesty

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https://bugs.launchpad.net/bugs/1688114

Title:
  arm64/ACPI support for SBSA watchdog

Status in linux package in Ubuntu:
  Fix Committed
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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