| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="sse412passthrough">
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| 4 | <title>Passing Through SSE4.1/SSE4.2 Instructions</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>To provide SSE 4.1/SSE 4.2 support to guests, the host CPU has to implement these instruction sets. The
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| 8 | instruction sets are exposed to guests by default, but it is possible to disable the instructions for certain
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| 9 | guests by using the following commands: </p>
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| 10 | <pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> \
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| 11 | VBoxInternal/CPUM/IsaExts/SSE4.1 0
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| 12 | $ VBoxManage setextradata <varname>VM-name</varname> \
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| 13 | VBoxInternal/CPUM/IsaExts/SSE4.2 0</pre>
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| 14 | <p>These are per-VM settings which are enabled by default. </p>
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| 15 | </body>
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| 16 |
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| 17 | </topic>
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