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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Tags added: cherry-pick

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https://bugs.launchpad.net/bugs/1589704

Title:
  workaround cavium thunderx silicon erratum 23144

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  In Progress

Bug description:
  [Impact]
  This impacts 2 socket Cavium ThunderX systems using pass-1.1 silicon, and can result in IO hangs.

  [Test Case]
  $ dmesg | grep "ITS command queue timeout"

  [Regression Risk]
  The workaround is in gicv3 specific code, and only activated when the hw revision in the IIDR matches ThunderX pass 1.x silicon, so risk to other platforms is minimal.

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