linux-kernel - Re: [PATCH v2 4/4] x86/split_lock: Disable #AC for split locked accesses

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]

Date:   Fri, 29 Jun 2018 09:31:11 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, H Peter Anvin <hpa@...or.com>
Cc:     Ashok Raj <ashok.raj@...el.com>, Alan Cox <alan@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Rafael Wysocki <rafael.j.wysocki@...el.com>,
        Tony Luck <tony.luck@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH v2 4/4] x86/split_lock: Disable #AC for split locked
 accesses

On 06/29/2018 07:33 AM, Fenghua Yu wrote:
> +	ac_split_lock_off [X86]
> +			Disable #AC exception for split locked accesses.
> +			By default, this feature is enabled in kernel.

FWIW, I detest the "ac_" nomenclature this patch spreads around.  It's
marginally passable for in-kernel use, but I'd rather see it stopped
where it reflects out to user-visible places.  Let's give this a logical
name, like:

	split_lock_detect=off