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[Bug 1352640] patches backported from


------- Comment on attachment From brenohl@xxxxxxxxxx 2014-08-12 16:33 EDT-------

These are the patches backported over 9deefe4 UBUNTU: Ubuntu-3.16.0-7.12

** Attachment added: "patches backported from"

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  Huge PCI BAR support needed for Ubuntu 14.10

Status in “linux” package in Ubuntu:

Bug description:
  == Comment: #0 - Brian Hart <hartb@xxxxxxxxxx> - 2014-08-04 17:26:34 ==
  ---Problem Description---
  Our project requires Huge BAR Support (i.e. support for PCI BAR spaces > 1G) in Ubuntu 14.10.  Guo and Gavin are working on the kernel changes (and Sapphire/OPAL changes?) and have already submitted patches.  The patches did not make the 3.16 cut-off, so will need to be back-ported to the 14.10 kernel.

  I believe the patches are the set described by:

  Contact Information = Brian Hart (hartb@xxxxxxxxxx), Dave Marquardt (davemarq@xxxxxxxxxx) 
  ---uname output---
  Linux tul115p1 3.16.0-6-generic #11-Ubuntu SMP Mon Jul 28 02:00:45 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux
  ---Additional Hardware Info---
  Problem is seen with PCI adapters that request > 1G of BAR space.  We've seen it with GPUs that request a BAR1 of size 16G. 

  Machine Type = 8286-42A 
  A debugger is not configured
  ---Steps to Reproduce---
   Add a PCI adapter which requests huge BAR space in the system.  The huge BARs will not be assigned and the adapter will likely not initialize.
  Stack trace output:
  Oops output:
  System Dump Info:
    The system is not configured to capture a system dump.
  *Additional Instructions for Brian Hart (hartb@xxxxxxxxxx), Dave Marquardt (davemarq@xxxxxxxxxx): 
  -Attach sysctl -a output output to the bug.

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