[Bug 1808498] Comment bridged from LTC Bugzilla

[bugproxy]

------- Comment From shigbhat at in.ibm.com 2019-03-07 15:16 EDT-------
[Impact]

- Without the fix, the system will crash on upstream hostboot with NMI enabled systems when opal-prd occ reset is triggered on OpenBMC boxes
- This patch enables HBRT to use HYP special wakeup register in openBMC which until now was only used in FSP based machines

[Testcase]

- opal-prd occ reset

[Regression Potential]
- Failure of OCC reset command

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https://bugs.launchpad.net/bugs/1808498

Title:
  opal-prd occ reset causes hardlockup

Status in The Ubuntu-power-systems project:
  Incomplete
Status in skiboot package in Ubuntu:
  Fix Released
Status in skiboot source package in Bionic:
  Incomplete
Status in skiboot source package in Cosmic:
  Incomplete
Status in skiboot source package in Disco:
  Fix Released

Bug description:
  [Impact]

   * HWE enablement
   * This patch enables HBRT to use HYP special wakeup register in openBMC which until now was only used in FSP based machines.

  [Test Case]

   * TODO

  [Regression Potential]

   * TODO

   * discussion of how regressions are most likely to manifest as a
  result of this change.

   * It is assumed that any SRU candidate patch is well-tested before
     upload and has a low overall risk of regression, but it's important
     to make the effort to think about what ''could'' happen in the
     event of a regression.

   * This both shows the SRU team that the risks have been considered,
     and provides guidance to testers in regression-testing the SRU.

  [Other Info]
   
   * Original bug report.

  
  == Comment: #0 - Shilpasri G. Bhat <shigbhat at in.ibm.com> - 2018-12-14 00:14:51 ==
  On upstream hostboot with NMI enabled, opal-prd occ reset crashes. The following upstream patch needs to be backported to the package to avoid the error.

  commit 05dc67bf4f3d85fc6212d1644d46ce6d8bd71140
  opal-prd: hservice: Enable hservice->wakeup() in BMC

  Contact Information = shigbhat at in.ibm.com

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