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  <div class="section" id="skiboot-6-6">
<span id="id1"></span><h1>skiboot-6.6<a class="headerlink" href="#skiboot-6-6" title="Permalink to this headline"></a></h1>
<p>skiboot v6.6 was released on Wednesday April 22nd 2020. It is the first release
of skiboot 6.6 series, which becomes the new stable release following the
<a class="reference internal" href="skiboot-6.5.html#skiboot-6-5"><span class="std std-ref">skiboot-6.5</span></a> release, first released August 16th 2019.</p>
<p>There hasn’t been a skiboot release in a while and this release doesn’t contain
a huge number of new features for users, just a lot of bug fixes, and additional
platform support. The next release should be a little more lively with a number
of internal refactorings and new features on the way.</p>
<div class="section" id="new-features">
<span id="skiboot-6-6-new-features"></span><h2>New features<a class="headerlink" href="#new-features" title="Permalink to this headline"></a></h2>
<ul>
<li><p class="first">Skiboot is now dual licensed as Apache 2.0 -OR- GPLv2+</p>
<p>There are some files still licensed Apache 2.0 only due to contributions
that we are unable to change the license of, but they are the minority.</p>
</li>
<li><p class="first">Skiboot can now be built as little endian, thanks to Team Nick.</p>
<p>Doing so requires building with: make LITTLE_ENDIAN=1</p>
</li>
<li><p class="first">OpenCAPI reset support</p>
<p>This is to allow FPGA-based OpenCAPI devices to be re-flashed with a new
device image, then reset to activate the new image. Although it is based
on top of the existing PCI Hotplug support it does require some OS changes
to function.</p>
</li>
<li><p class="first">The <a class="reference internal" href="../opal-api/opal-phb-flag-set-get-179-180.html#opal-phb-set-option"><span class="std std-ref">OPAL_PHB_SET_OPTION</span></a> and <a class="reference internal" href="../opal-api/opal-phb-flag-set-get-179-180.html#opal-phb-get-option"><span class="std std-ref">OPAL_PHB_GET_OPTION</span></a> OPAL calls</p>
<p>These OPAL calls provide the OS with a means for controlling per-PHB
settings. Currently this allows the OS to enable or disable the the “Global
MMIO EEH Disable” and “4GTE” settings which are available on Power9 / PHB4.
See the PHB specification for more details.</p>
</li>
</ul>
</div>
<div class="section" id="removed-features">
<h2>Removed features<a class="headerlink" href="#removed-features" title="Permalink to this headline"></a></h2>
<ul>
<li><p class="first">Fast-reboot is now disabled by default.</p>
<p>Fast-reboot will continue to be supported, but as an opt-in feature rather
than the default. From the commit (ee07f2c68160) message:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">This</span> <span class="n">has</span> <span class="n">two</span> <span class="n">user</span> <span class="n">visible</span> <span class="n">changes</span><span class="p">:</span>

<span class="mf">1.</span> <span class="n">Full</span> <span class="n">reboot</span> <span class="ow">is</span> <span class="n">now</span> <span class="n">the</span> <span class="n">default</span><span class="o">.</span> <span class="n">In</span> <span class="n">order</span> <span class="n">to</span> <span class="n">get</span> <span class="n">fast</span><span class="o">-</span><span class="n">reboot</span> <span class="k">as</span> <span class="n">the</span>
   <span class="n">default</span> <span class="n">the</span> <span class="n">nvram</span> <span class="n">option</span> <span class="n">needs</span> <span class="n">to</span> <span class="n">be</span> <span class="nb">set</span><span class="p">:</span>

        <span class="n">nvram</span> <span class="o">-</span><span class="n">p</span> <span class="n">ibm</span><span class="p">,</span><span class="n">skiboot</span> <span class="o">--</span><span class="n">update</span><span class="o">-</span><span class="n">config</span> <span class="n">fast</span><span class="o">-</span><span class="n">reset</span><span class="o">=</span><span class="mi">1</span>

<span class="mf">2.</span> <span class="n">The</span> <span class="n">nvram</span> <span class="n">option</span> <span class="n">to</span> <span class="n">force</span> <span class="n">a</span> <span class="n">fast</span><span class="o">-</span><span class="n">reboot</span> <span class="n">even</span> <span class="n">when</span> <span class="n">some</span> <span class="n">part</span> <span class="n">of</span>
   <span class="n">skiboot</span> <span class="n">has</span> <span class="n">called</span> <span class="n">disable_fast_reboot</span><span class="p">()</span> <span class="n">has</span> <span class="n">changed</span> <span class="kn">from</span>
   <span class="s1">&#39;fast-reset=im-feeling-lucky&#39;</span> <span class="n">to</span> <span class="s1">&#39;force-fast-reset=1&#39;</span> <span class="n">because</span>
   <span class="n">it</span><span class="s1">&#39;s impossible to actually use that &#39;</span><span class="n">feature</span><span class="s1">&#39; if fast-reboot is</span>
   <span class="n">off</span> <span class="n">by</span> <span class="n">default</span><span class="o">.</span>

        <span class="n">nvram</span> <span class="o">-</span><span class="n">p</span> <span class="n">ibm</span><span class="p">,</span><span class="n">skiboot</span> <span class="o">--</span><span class="n">update</span><span class="o">-</span><span class="n">config</span> <span class="n">force</span><span class="o">-</span><span class="n">fast</span><span class="o">-</span><span class="n">reset</span><span class="o">=</span><span class="mi">1</span>
</pre></div>
</div>
</li>
</ul>
</div>
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