linux-kernel - Re: [PATCH 00/11] x86: Supervisor Mode Access Prevention

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Message-ID: <20120922113226.GA3257@gmail.com>
Date:	Sat, 22 Sep 2012 13:32:26 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	Dave Jones <davej@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Linda Wang <lwang@...hat.com>,
	Matt Fleming <matt.fleming@...el.com>
Subject: Re: [PATCH 00/11] x86: Supervisor Mode Access Prevention


* H. Peter Anvin <hpa@...ux.intel.com> wrote:

> On 09/21/2012 03:08 PM, Dave Jones wrote:
> > 
> > Perhaps add a printk somewhere to show that it's actually been enabled maybe ?
> > 
> > Also, would it be feasible to add something like we have for test_nx ?
> > If this feature regresses in some way in the future, I suspect we'd like
> > to know about it sooner rather than later.
> > 
> 
> Good idea... should add this both for SMEP and SMAP.

Very much agreed - these exploit preventation hardware features 
are really useful, and it's good to inform the user that they 
are active.

Thanks,

	Ingo
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