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/1694506

Title:
  arm-smmu arm-smmu.2.auto: Unhandled context fault

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  [Impact]
  When booting hwe-z on a Cavium ThunderX system in ACPI mode, the on-board 
NICs don't come up, and the console emits messages like:

  [ 78.986867] arm-smmu arm-smmu.2.auto: Unhandled context fault: fsr=0x402, 
iova=0x1f60e8d000, fsynr=0x40090, cb=4
  [ 78.997030] arm-smmu arm-smmu.2.auto: Unhandled context fault: fsr=0x402, 
iova=0x1f4bbdd000, fsynr=0x50090, cb=5
  [ 79.185826] arm-smmu arm-smmu.2.auto: Unhandled context fault: fsr=0x402, 
iova=0x1f60e8e000, fsynr=0x40090, cb=4
  [ 79.195990] arm-smmu arm-smmu.2.auto: Unhandled context fault: fsr=0x402, 
iova=0x1f4bbde000, fsynr=0x50090, cb=5

  [Test Case]
  dmesg | grep "Unhandled context fault"
  Onboard NICs work (can ssh into it).

  [Regression Risk]
  The upstream fix changes are restricted to the NIC driver for this SoC, so 
regression risk can be mitigated by direct testing. Non-ACPI mode was also 
tested to make sure we're not breaking DT-based platforms while fixing this for 
ACPI-based platforms.

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