linux-kernel - Re: MTRR initialization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	20 Sep 2007 08:50:23 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jesse Barnes <jesse.barnes@...el.com>
Cc:	Howard Chu <hyc@...as.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: MTRR initialization

Jesse Barnes <jesse.barnes@...el.com> writes:
> 
> To do this in a nicer way (and be less vulnerable to similar BIOS 
> funkiness) the kernel really needs full PAT support.  That should allow 
> WC over WB and WC over UC mappings to occur, at least if I'm 
> remembering the docs right...

PAT only really helps for device driver performance optimizations.
But if the basic WB MTRRs are wrong PAT cannot really salvage it. 

-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/