How to tell whether CPU supports x64?

Adam Vande More amvandemore at
Thu Mar 17 23:27:15 UTC 2011

On Thu, Mar 17, 2011 at 5:14 PM, Ilya Kazakevich
<kazakevichilya at>wrote:

> Afaik there should be "LM" in "AMD features" output. Even for Intel. Grep
> your dmesg.boot for LM.

Please don't top-post.

yes that is correct, LM stands for Long Mode which indicates amd64 support.
If your CPU doesn't list it, it's either a 32 bit only CPU, or it's a bug.

Adam Vande More

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