From: "Christoph Egger" <Christoph.Egger@amd.com>
To: xen-devel@lists.xensource.com
Cc: Dave Lively <dlively@virtualiron.com>
Subject: Re: [PATCH][HVM] fix migration from NX-capable machine to non-NX-capable machine
Date: Fri, 28 Sep 2007 15:32:51 +0200 [thread overview]
Message-ID: <200709281532.52254.Christoph.Egger@amd.com> (raw)
In-Reply-To: <1b64e7ec0709280622m37f0c272y6b61a0f2ed92b210@mail.gmail.com>
>
> > As for AMD, are there any SVM CPUs that do not also support NX?
>
> I saw this bug on an Intel CPU that supported NX -- it was just
> disabled in the BIOS. I'll be speaking with some AMD folks later this
> morning, so I'll ask whether the same thing is possible w/AMD SVM.
You can figure out, if NX is supported by looking up the EFER.
It is possible to enable/disable NX in the PAE-paging mode by
setting/clearing the NXE bit in EFER.
Christoph
--
AMD Saxony, Dresden, Germany
Operating System Research Center
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next prev parent reply other threads:[~2007-09-28 13:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-27 21:12 [PATCH][HVM] fix migration from NX-capable machine to non-NX-capable machine David Lively
2007-09-28 6:58 ` Keir Fraser
2007-09-28 13:22 ` Dave Lively
2007-09-28 13:32 ` Christoph Egger [this message]
2007-09-28 7:18 ` Keir Fraser
2007-09-28 13:23 ` Dave Lively
2007-09-28 14:01 ` Keir Fraser
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