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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** No longer affects: linux (Ubuntu Artful)

** No longer affects: linux (Ubuntu Xenial)

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https://bugs.launchpad.net/bugs/1762928

Title:
  [LTC Test] Ubuntu 18.04: tm_trap_test failed on P8 compat mode guest

Status in The Ubuntu-power-systems project:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Released

Bug description:
  ---Problem Description---
  tm_trap_test failed on P8 compat mode [16.04.04 daily build as well bionic ] guests on a P9 host running bionic final beta version.
   
  Contact Information = srikanth/bssrikanth@xxxxxxxxxx 
   
  ---uname output---

  16.04.04 Guest running in P8compat mode:

  Linux guest 4.15.0-15-generic #16~16.04.1-Ubuntu SMP Thu Apr 5 12:18:22 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux
   
  18.04 guest running in P8compat mode:
  Linux ubuntu 4.15.0-15-generic #16-Ubuntu SMP Wed Apr 4 13:57:51 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux

  Machine Type = boston-LC 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. Log into P9 Ubuntu 18.04 host, take console of guest `srikanth_ubuntu160404`
  2. Run TM selftests
  git clone --depth 1 https://github.com/torvalds/linux.git;cd linux/tools/testing/selftests/powerpc/;git log --oneline -1;make;make -C tm run_tests

  We will observe one of the tm tests failing, mentioned below:

  selftests: tm-trap
  ========================================
  test: tm_trap_test
  tags: git_version:c18bb39
  Little-Endian machine detected. Checking if endianness flips inadvertently on trap in TM... yes!
  failure: tm_trap_test
  not ok 1..11 selftests:  tm-trap [FAIL]

  
  Expected result: All tm selftests should have been pass on the P8 compat guest.. giventhat we had TM workaround patches in latest Ubuntu BIONIC host kernel
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Info:
    The system is not configured to capture a system dump.
   
  *Additional Instructions for srikanth/bssrikanth@xxxxxxxxxx: 
  -Attach sysctl -a output output to the bug.


  == Comment: #2 - SRIKANTH AITHAL <bssrikanth@xxxxxxxxxx> - 2018-04-10
  01:32:00 ==

  
  == Comment: #3 - SRIKANTH AITHAL <bssrikanth@xxxxxxxxxx> - 2018-04-10 01:33:41 ==

  
  == Comment: #4 - SRIKANTH AITHAL <bssrikanth@xxxxxxxxxx> - 2018-04-10 01:34:02 ==

  
  Please pick 

   `1c200e63d055 ("powerpc/tm: Fix endianness flip on trap")`

  ie. the commit that the test was written for

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