| |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" |
| "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
| <title>Release Notes for OpenPower Firmware v2.0.5 — OpenPOWER Firmware v2.6-257-g5b5624c2 |
| documentation</title> |
| <link rel="stylesheet" href="../_static/alabaster.css" type="text/css" /> |
| <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> |
| <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> |
| <script type="text/javascript" src="../_static/jquery.js"></script> |
| <script type="text/javascript" src="../_static/underscore.js"></script> |
| <script type="text/javascript" src="../_static/doctools.js"></script> |
| <link rel="index" title="Index" href="../genindex.html" /> |
| <link rel="search" title="Search" href="../search.html" /> |
| <link rel="next" title="Release Notes for OpenPower Firmware v2.0.6" href="v2.0.6.html" /> |
| <link rel="prev" title="Release Notes for OpenPower Firmware v2.0.4" href="v2.0.4.html" /> |
| |
| <link rel="stylesheet" href="../_static/custom.css" type="text/css" /> |
| |
| |
| <meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" /> |
| |
| </head><body> |
| |
| |
| <div class="document"> |
| <div class="documentwrapper"> |
| <div class="bodywrapper"> |
| |
| |
| <div class="body" role="main"> |
| |
| <div class="section" id="release-notes-for-openpower-firmware-v2-0-5"> |
| <h1>Release Notes for OpenPower Firmware v2.0.5<a class="headerlink" href="#release-notes-for-openpower-firmware-v2-0-5" title="Permalink to this headline">¶</a></h1> |
| <p>op-build v2.0.5 was released on Thursday July 19th, 2018 and replaces op-build v2.0.4 as the current stable release in the 2.0.x series.</p> |
| <p>It is recommended that v2.0.4 be used over any previous v2.0.x version due to the bug fixes contained within.</p> |
| <div class="section" id="updated-packages"> |
| <h2>Updated Packages<a class="headerlink" href="#updated-packages" title="Permalink to this headline">¶</a></h2> |
| <table border="1" class="docutils"> |
| <colgroup> |
| <col width="18%" /> |
| <col width="18%" /> |
| <col width="18%" /> |
| <col width="45%" /> |
| </colgroup> |
| <thead valign="bottom"> |
| <tr class="row-odd"><th class="head">Package</th> |
| <th class="head">Old Version</th> |
| <th class="head">New Version</th> |
| <th class="head">Platforms</th> |
| </tr> |
| </thead> |
| <tbody valign="top"> |
| <tr class="row-even"><td>skiboot</td> |
| <td>v6.0.5</td> |
| <td>v6.0.6</td> |
| <td>openpower_mambo, firestone, firenze, garrison, |
| zaius, p9dsu, palmetto, pseries, vesnin, |
| witherspoon, habanero, openpower_p9_mambo, zz, |
| barreleye, romulus</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="skiboot-changes"> |
| <h2>Skiboot changes<a class="headerlink" href="#skiboot-changes" title="Permalink to this headline">¶</a></h2> |
| <ul> |
| <li><p class="first">phb4/CAPI: Reallocate PEC2 DMA-Read engines to improve GPU-Direct bandwidth</p> |
| <p>We reallocate additional 16/8 DMA-Read engines allocated to stack0/1 |
| on PEC2 respectively. This is needed to improve bandwidth available to |
| the Mellanox CX5 adapter when trying to read GPU memory (GPU-Direct).</p> |
| <p>If kernel cxl driver indicates a request to allocate maximum possible |
| DMA read engines when calling enable_capi_mode() and card is attached |
| to PEC2/stack0 slot then we assume its a Mellanox CX5 adapter. We then |
| allocate additional 16/8 extra DMA read engines to stack0 and stack1 |
| respectively on PEC2. This is done by populating the |
| XPEC_PCI_PRDSTKOVR and XPEC_NEST_READ_STACK_OVERRIDE as suggested by |
| the h/w team.</p> |
| </li> |
| <li><p class="first">phb4: Disable nodal scoped DMA accesses when PB pump mode is enabled</p> |
| <p>By default when a PCIe device issues a read request via the PHB it is first |
| issued with nodal scope. When accessing GPU memory the NPU does not know at the |
| time of response if the requested memory page is off node or not. Therefore |
| every read of GPU memory by a PHB is retried with larger scope which introduces |
| bandwidth and latency issues.</p> |
| <p>On smaller boxes which have pump mode enabled nodal and group scoped reads are |
| treated the same and both types of request are broadcast to one chip. Therefore |
| we can avoid the retry by disabling nodal scope on the PHB for these boxes. On |
| larger boxes nodal (single chip) and group (multiple chip) scoped reads are |
| treated differently. Therefore we avoid disabling nodal scope on large boxes |
| which have pump mode disabled to avoid all PHB requests being broadcast to |
| multiple chips.</p> |
| </li> |
| <li><p class="first">npu2/hw-procedures: Enable parity and credit overflow checks</p> |
| <p>Enable these error checking features by setting the appropriate bits in |
| our one-off initialization of each “NTL Misc Config 2” register.</p> |
| <p>The exception is NDL RX parity checking, which should be disabled during |
| the link training procedures.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| |
| |
| </div> |
| |
| </div> |
| </div> |
| <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> |
| <div class="sphinxsidebarwrapper"> |
| <h1 class="logo"><a href="../index.html">OpenPOWER Firmware</a></h1> |
| |
| |
| |
| |
| |
| |
| |
| |
| <h3>Navigation</h3> |
| <p class="caption"><span class="caption-text">Contents:</span></p> |
| <ul class="current"> |
| <li class="toctree-l1"><a class="reference internal" href="../introduction.html">Introduction to OpenPOWER Firmware</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../testing.html">Testing op-build</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../process/index.html">Development Process</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../boot-devices.html">Supported Boot Devices</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../versioning.html">Version Scheme</a></li> |
| <li class="toctree-l1 current"><a class="reference internal" href="index.html">op-build Release Notes</a><ul class="current"> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v1-21">v1.21</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v1-22">v1.22</a></li> |
| <li class="toctree-l2 current"><a class="reference internal" href="index.html#v2-0">v2.0</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-1">v2.1</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-2">v2.2</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-3">v2.3</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-4">v2.4</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-5">v2.5</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="index.html#v2-6">v2.6</a></li> |
| </ul> |
| </li> |
| </ul> |
| |
| <div class="relations"> |
| <h3>Related Topics</h3> |
| <ul> |
| <li><a href="../index.html">Documentation overview</a><ul> |
| <li><a href="index.html">op-build Release Notes</a><ul> |
| <li>Previous: <a href="v2.0.4.html" title="previous chapter">Release Notes for OpenPower Firmware v2.0.4</a></li> |
| <li>Next: <a href="v2.0.6.html" title="next chapter">Release Notes for OpenPower Firmware v2.0.6</a></li> |
| </ul></li> |
| </ul></li> |
| </ul> |
| </div> |
| <div id="searchbox" style="display: none" role="search"> |
| <h3>Quick search</h3> |
| <div class="searchformwrapper"> |
| <form class="search" action="../search.html" method="get"> |
| <input type="text" name="q" /> |
| <input type="submit" value="Go" /> |
| <input type="hidden" name="check_keywords" value="yes" /> |
| <input type="hidden" name="area" value="default" /> |
| </form> |
| </div> |
| </div> |
| <script type="text/javascript">$('#searchbox').show(0);</script> |
| |
| |
| |
| |
| |
| |
| |
| |
| </div> |
| </div> |
| <div class="clearer"></div> |
| </div> |
| <div class="footer"> |
| ©2017, OpenPOWER Foundation System Software Work Group. |
| |
| | |
| Powered by <a href="http://sphinx-doc.org/">Sphinx 1.7.9</a> |
| & <a href="https://github.com/bitprophet/alabaster">Alabaster 0.7.12</a> |
| |
| | |
| <a href="../_sources/release-notes/v2.0.5.rst.txt" |
| rel="nofollow">Page source</a> |
| </div> |
| |
| |
| |
| |
| </body> |
| </html> |