linux-kernel - Re: Dealing with the NMI mess

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Message-ID: <20150731042205.GB32117@nazgul.tnic>
Date:	Fri, 31 Jul 2015 06:22:05 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Willy Tarreau <w@....eu>, Steven Rostedt <rostedt@...dmis.org>,
	X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Brian Gerst <brgerst@...il.com>
Subject: Re: Dealing with the NMI mess

On Thu, Jul 30, 2015 at 02:22:06PM -0700, Andy Lutomirski wrote:
> Great.  There's an opcode that invokes an interrupt gate that's not
> marked as allowing unprivileged access, and that opcode doesn't appear
> in the SDM.  It appears in the APM opcode map with no explanation at
> all.
> 
> Thanks, CPU vendors.

Here's something better:

http://www.rcollins.org/secrets/opcodes/ICEBP.html

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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