From mboxrd@z Thu Jan  1 00:00:00 1970
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1754737AbeAGVth (ORCPT <rfc822;ralf@linux-mips.org> + 1 other);
        Sun, 7 Jan 2018 16:49:37 -0500
Received: from Galois.linutronix.de ([146.0.238.70]:47884 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1754693AbeAGVtg (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Sun, 7 Jan 2018 16:49:36 -0500
Message-Id: <20180107214759.387300853@linutronix.de>
User-Agent: quilt/0.63-1
Date: Sun, 07 Jan 2018 22:47:59 +0100
From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linuxfoundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Borislav Petkov <bp@alien8.de>,
        David Woodhouse <dwmw@amazon.co.uk>,
        Dave Hansen <dave.hansen@intel.com>,
        Will Deacon <will.deacon@arm.com>
Subject: [patch V2 0/2] sysfs/cpu: Implement generic vulnerabilites directory
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>

The meltdown/spectre vulnerabilities affect several architectures and
people are asking for a common way to figure out whether a system is
affected or not.

Create

   /sys/devices/system/cpu/vulnerabilites

and the files

   /sys/devices/system/cpu/vulnerabilites/meltdown
   /sys/devices/system/cpu/vulnerabilites/spectre_v1
   /sys/devices/system/cpu/vulnerabilites/spectre_v2

Add the x86 implementation which shows:

meltdown    Mitigation: PTI
spectre_v1  Vulnerable
sepctre_v1  Vulnerable
   
On an AMD CPU the output of meltdown is: Not affected.

If PTI is turned off and the CPU is affected of meltdown the output
becomes: Vulnerable

That series applies on top of

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti

V1 -> V2: Add documentation and use sprintf

Thanks,

	tglx