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Re: [Xen-devel] [PATCH 1 of 3] xenpaging: Add a check to Xen for EPT

To: Patrick Colp <pjcolp@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 1 of 3] xenpaging: Add a check to Xen for EPT
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Wed, 28 Jul 2010 14:58:28 +0100
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Patrick Colp writes ("[Xen-devel] [PATCH 1 of 3] xenpaging: Add a check to Xen 
for EPT"):
> xenpaging: Add a check to Xen for EPT.
> There isn't seem to be a way to directly check for EPT, so instead check for
> HAP and an Intel processor. If EPT isn't enabled, then return an error to the
> tool.

I haven't tested this but this and the corresponding patch 2/3 to
produce a better error message look sane.  I do have one question: why
ENODEV and not ENOSYS ?  (I'm not particularly familiar with the
hypervisor's errno conventions.)


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