<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/90365>90365</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Cortex-A72: Default Model should not enable crypto features
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          v01dXYZ
      </td>
    </tr>
</table>

<pre>
    The Crypto Engine is provided only as an extension and is not part of the base license.

This [ARM documentation page](https://developer.arm.com/documentation/100095/0002/programmers-model/about-the-programmers-model) states:

>  The optional Cryptography engine is not included in the base product of the processor. ARM requires licensees to have contractual rights to obtain the Cortex-A72 processor Cryptography engine. 

One very famous example of a cortex-a72 chip without the crypto engine is the one in the Raspberry 4 (related issue: https://github.com/llvm/llvm-project/issues/85699).

Here is the current definition of the features for `cortex-a72`: 

https://github.com/llvm/llvm-project/blob/53ff002c6f7ec64a75ab0990b1314cc6b4bb67cf/llvm/include/llvm/TargetParser/AArch64TargetParser.h#L573-L575

It's likely that's also the case for other models.
</pre>
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