From: "H. Peter Anvin" <hpa@zytor.com>
To: Jordan Crouse <jordan.crouse@amd.com>
Cc: jkeating@redhat.com, Joerg Pommnitz <pommnitz@yahoo.com>,
Chuck Ebbert <cebbert@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@suse.de>
Subject: Re: More E820 brokenness
Date: Thu, 27 Sep 2007 17:12:19 -0700 [thread overview]
Message-ID: <46FC46E3.5020508@zytor.com> (raw)
In-Reply-To: <20070927235427.GA18900@cosmic.amd.com>
Jordan Crouse wrote:
>
> Worked, but that just raises more questions. Why didn't more x86 boxes
> break or, alternatively, why did a new version of the BIOS fix the problem?
> I guess we shouldn't look a gift horse in the mouth. Or something.
>
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
next prev parent reply other threads:[~2007-09-28 0:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-27 22:17 More E820 brokenness H. Peter Anvin
2007-09-27 22:33 ` Jordan Crouse
2007-09-27 22:47 ` H. Peter Anvin
2007-09-27 23:15 ` Jordan Crouse
2007-09-27 23:22 ` H. Peter Anvin
2007-09-27 23:27 ` H. Peter Anvin
2007-09-27 23:34 ` Jordan Crouse
2007-09-27 23:36 ` H. Peter Anvin
2007-09-27 23:54 ` Jordan Crouse
2007-09-28 0:12 ` H. Peter Anvin [this message]
2007-09-28 13:05 ` Rafael J. Wysocki
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=46FC46E3.5020508@zytor.com \
--to=hpa@zytor.com \
--cc=ak@suse.de \
--cc=cebbert@redhat.com \
--cc=jkeating@redhat.com \
--cc=jordan.crouse@amd.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pommnitz@yahoo.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox