From: Andreas Herrmann <andreas.herrmann3@amd.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Rene Herman <rene.herman@keyaccess.nl>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Suresh B Siddha <suresh.b.siddha@intel.com>
Subject: Re: [PATCH 2/5] x86: PAT: fix ambiguous paranoia check in pat_init()
Date: Wed, 11 Jun 2008 11:47:30 +0200 [thread overview]
Message-ID: <20080611094730.GB5889@alberich.amd.com> (raw)
In-Reply-To: <484F0F5D.8010507@zytor.com>
On Tue, Jun 10, 2008 at 04:33:49PM -0700, H. Peter Anvin wrote:
> Rene Herman wrote:
>> The current setup is okay really. The only thing it still wants is a
>> commandline whitelist switch but that needs a somewhat different setup as
>> validate_pat_support() is too early for __setup() or early_param().
>
> Actually, I think it's time to nuke the whitelist. I don't think it has
> any CPUs on it that have the PAT flag enabled, still.
For Intel all family 0xf CPUs, and family 6 CPUs starting with model
15 are whitelisted.
There seem to be other Intel CPUs that advertise PAT support.
See cpuinfo output at http://gentoo-wiki.com/Safe_Cflags
E.g. Pentium M (model 13), Celeron (model 6), Pentium III (model 8).
(Not sure how correct this information is, though)
Turn the white- into a blacklist for those remaining CPUs until they
are verified?
Andreas
next prev parent reply other threads:[~2008-06-11 9:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-10 14:05 Andreas Herrmann
2008-06-10 22:55 ` Rene Herman
2008-06-10 23:33 ` H. Peter Anvin
2008-06-11 9:47 ` Andreas Herrmann [this message]
2008-06-11 15:05 ` [PATCH] x86: enable PAT on (almost) all CPUs that advertise it Andreas Herrmann
2008-06-11 16:44 ` H. Peter Anvin
2008-06-11 17:35 ` [PATCH 2/5] x86: PAT: fix ambiguous paranoia check in pat_init() H. Peter Anvin
2008-06-11 9:41 ` Andreas Herrmann
2008-06-11 12:58 ` Rene Herman
2008-06-11 16:12 ` Andreas Herrmann
2008-06-12 4:32 ` Rene Herman
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=20080611094730.GB5889@alberich.amd.com \
--to=andreas.herrmann3@amd.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=rene.herman@keyaccess.nl \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
--cc=venkatesh.pallipadi@intel.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
all inboxes | Powered by JetHome®