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== 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:

https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-July/119170.html
 
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 
 
---Debugger---
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:
 no
 
Oops output:
 no
 
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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-114190 severity-critical targetmilestone-inin1410
-- 
Huge PCI BAR support needed for Ubuntu 14.10
https://bugs.launchpad.net/bugs/1352640
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