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| <section id="skiboot-5-9-4"> |
| <span id="id1"></span><h1>skiboot-5.9.4<a class="headerlink" href="#skiboot-5-9-4" title="Link to this heading">ΒΆ</a></h1> |
| <p>skiboot 5.9.4 was released on Wednesday November 29th, 2017. It replaces |
| <a class="reference internal" href="skiboot-5.9.3.html#skiboot-5-9-3"><span class="std std-ref">skiboot-5.9.3</span></a> as the current stable release in the 5.9.x series.</p> |
| <p>Over <a class="reference internal" href="skiboot-5.9.3.html#skiboot-5-9-3"><span class="std std-ref">skiboot-5.9.3</span></a>, we have one NPU2/NVLink2 fix that works around |
| a potential glitch (the one <a class="reference internal" href="skiboot-5.9.3.html#skiboot-5-9-3"><span class="std std-ref">skiboot-5.9.3</span></a> would hard crash on rather |
| than let a system continue to run until it mysteriously crashed later on).</p> |
| <p>That fix is in two parts:</p> |
| <ul> |
| <li><p>npu2: hw-procedures: Change phy_rx_clock_sel values to recover from a |
| potential glitch.</p></li> |
| <li><p>npu2: hw-procedures: Manipulate IOVALID during training</p> |
| <p>Ensure that the IOVALID bit for this brick is raised at the start of |
| link training, in the reset_ntl procedure.</p> |
| <p>Then, to protect us from a glitch when the PHY clock turns off or gets |
| chopped, lower IOVALID for the duration of the phy_reset and |
| phy_rx_dccal procedures.</p> |
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