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<base href="https://bugs.dpdk.org/">
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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - Unsuitable IOVA mode may be picked as the default"
href="https://bugs.dpdk.org/show_bug.cgi?id=1657">1657</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Unsuitable IOVA mode may be picked as the default
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>18.11
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>core
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nandinipersad361@gmail.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">Not all kernel drivers and not all devices support all IOVA modes. EAL will
attempt to pick a reasonable default based on a number of factors, but there
may be cases where the default may be unsuitable (for example, hotplugging
devices using igb_uio driver while having picked IOVA as VA mode on EAL
initialization).
Implication
Some devices (hotplugged or otherwise) may not work due to incompatible IOVA
mode being automatically picked by EAL.
Resolution/Workaround:
It is possible to force EAL to pick a particular IOVA mode by using the
–iova-mode command-line parameter. If conflicting requirements are present
(such as one device requiring IOVA as PA and one requiring IOVA as VA mode),
there is no workaround.
Affected Environment/Platform:
Linux.
Driver/Module:
ALL.
</pre>
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