linux-kernel - Re: [PATCH v2 2/6] x86/mm/pat: Add pat

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <1458748164.6393.649.camel@hpe.com>
Date:	Wed, 23 Mar 2016 09:49:24 -0600
From:	Toshi Kani <toshi.kani@....com>
To:	Borislav Petkov <bp@...e.de>
Cc:	mingo@...nel.org, hpa@...or.com, tglx@...utronix.de,
	mcgrof@...e.com, jgross@...e.com, paul.gortmaker@...driver.com,
	konrad.wilk@...cle.com, elliott@....com, x86@...nel.org,
	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/6] x86/mm/pat: Add pat_disable() interface

On Wed, 2016-03-23 at 09:51 +0100, Borislav Petkov wrote:
> On Tue, Mar 22, 2016 at 03:40:45PM -0600, Toshi Kani wrote:
> > Will change to "Prevent the OS from initializing the PAT MSR".
> > 
> > I wanted to clarify that "disable" does not mean to disable PAT MSR.
> 
> How do you "disable PAT MSR" ?

We can't, but I thought not everyone knows how it works...

> I think you're overdocumenting this. pat_disable() is as clear as day
> what it does. It doesn't need any commenting...

Right, maybe I am just paranoid.  I will remove the comment as you
suggested.

> > I've run checkpatch.pl and thought it was OK to have this warning
> > (instead of a >80 warning) since the error message part was not split.
> >  The "attempting" part is for debugging and its string is passed from
> > the caller. 
> 
> We always put the quoted strings on a single line for easier grepping.
> Forget the 80-cols rule.

OK.

Thanks,
-Toshi