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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - __clear_cache for AArch64 might work incorrectly on Cortex-A53"
href="https://bugs.llvm.org/show_bug.cgi?id=42483">42483</a>
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<th>Summary</th>
<td>__clear_cache for AArch64 might work incorrectly on Cortex-A53
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>compiler-rt
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>maltsevm@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>According to Arm erratum 824069
(<a href="http://infocenter.arm.com/help/topic/com.arm.doc.epm048406/Cortex_A53_MPCore_Software_Developers_Errata_Notice_v20.pdf">http://infocenter.arm.com/help/topic/com.arm.doc.epm048406/Cortex_A53_MPCore_Software_Developers_Errata_Notice_v20.pdf</a>,
page 28) on some releases Cortex-A53 the "dc cvau" instruction (which is used
in clear_cache.c:__clear_cache) might not clear the cache line correctly in
certain circumstances. As a workaround, it is recommended to use the "dc civac"
instruction instead.</pre>
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