Re: More E820 brokenness

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To: Jordan Crouse <jordan.crouse@...>
Cc: <jkeating@...>, Joerg Pommnitz <pommnitz@...>, Chuck Ebbert <cebbert@...>, Linux Kernel Mailing List <linux-kernel@...>, Andi Kleen <ak@...>
Date: Thursday, September 27, 2007 - 8:12 pm

Jordan Crouse wrote:

Why didn't more x86 boxes break... well, it's pretty natural an
implementation of the BIOS to not clobber registers that aren't outputs.
 Arguably the BIOSes that do are still buggy, since there isn't a
well-defined calling sequence for the BIOS and the convention that has
evolved is "don't clobber anything unless it's an output."

It's still wrong, however, especially since it means omitting the *real*
SMAP check.

	-hpa
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Messages in current thread:
More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 6:17 pm)
Re: More E820 brokenness, Jordan Crouse, (Thu Sep 27, 6:33 pm)
Re: More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 6:47 pm)
Re: More E820 brokenness, Jordan Crouse, (Thu Sep 27, 7:15 pm)
Re: More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 7:27 pm)
Re: More E820 brokenness, Jordan Crouse, (Thu Sep 27, 7:34 pm)
Re: More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 7:36 pm)
Re: More E820 brokenness, Jordan Crouse, (Thu Sep 27, 7:54 pm)
Re: More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 8:12 pm)
Re: More E820 brokenness, Rafael J. Wysocki, (Fri Sep 28, 9:05 am)
Re: More E820 brokenness, H. Peter Anvin, (Thu Sep 27, 7:22 pm)