ubuntu@dawes:~$ dmesg | grep Machine
[    0.000000] Machine model: Cavium ThunderX CN88XX board
ubuntu@dawes:~$ cat /proc/version
Linux version 4.13.0-36-generic (buildd@bos02-arm64-021) (gcc version 5.4.0 
20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)) #40~16.04.1-Ubuntu SMP Fri Feb 
16 23:26:28 UTC 2018
ubuntu@dawes:~$ cat /proc/cmdline 
root=UUID=9c5dc96d-4531-4b51-aa28-cc97a30b1274 ro acpi=on

** Tags removed: verification-failed-artful
** Tags added: verification-done-artful

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  arm64/thunderx: Unhandled context faults in ACPI mode

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Zesty:
  Won't Fix
Status in linux source package in Artful:
  Fix Committed

Bug description:
  Booting a Cavium ThunderX node in ACPI mode results in constant messages like 
this to the console:
    arm-smmu Unhandled context fault: fsr=0x80000402, 
iova=0x0fffc000, fsynr=0x10081, cb=1

  In some configurations, this causes the SATA controller to fail to
  initialize, making the system unbootable. (Note to self: this occurs
  on our internal system known as "alekhin").

  [Test Case]
  Boot a Cavium ThunderX node w/ the kernel parameter "acpi=on" and watch the 

  [Regression Risk]
  The fixes are restricted to quirks for Cavium ThunderX hardware, which is 
hardware we've tested directly.

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