Stefan - <div>Updating the ME and Descriptor region is occasionally needed. Typically once per product. I say this from experience, as I own this on a Sandy Bridge / Ivy bridge product.</div><div>Ross<br><br><div class="gmail_quote">
On Wed, Mar 13, 2013 at 1:03 PM, Stefan Tauner <span dir="ltr">&lt;<a href="mailto:stefan.tauner@student.tuwien.ac.at" target="_blank">stefan.tauner@student.tuwien.ac.at</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Wed, 13 Mar 2013 13:15:32 +0000<br>
Greg Schardt &lt;<a href="mailto:gschardt@ddn.com">gschardt@ddn.com</a>&gt; wrote:<br>
<br>
&gt; I have modified the flashrom code to allow reads and writes to unprotected regions to occur, but am still blocked by having the ME region locked. Do you have any idea how the AFUDOS utility is able to modify the Management Engine region even though it should be locked? I would have thought that the Region Access Control settings would be in effect once the BIOS finished booting, before DOS could start. According to documentation, asserting HDA_SDO is the only way to override these settings, do you think that is the mechanism being used?<br>

<br>
AFAIK updating the ME directly is not possible if the locks are<br>
enabled (HDA_SDO is one way to disable them but that does not work<br>
after boot either). The ME probably is able to update itself and there<br>
is probably an interface for the host to transfer an image to it, but<br>
that&#39;s speculation. Are you sure afudos changes the ME region at all?<br>
<br>
AFAIK updating the ME (region) is not always needed. The problem is we<br>
do not know if this is true in all cases...<br>
<span class="HOEnZb"><font color="#888888">--<br>
Kind regards/Mit freundlichen Grüßen, Stefan Tauner<br>
<br>
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Newisys div of Sanmina<br>5385 Mark Dabling blvd<br>Colorado Springs, CO 80918<br>719-884-8714 (work)<br>719-287-4446 (cell)<br>
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