linux-kernel - Re: [PATCH v5 2/2] x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation

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Date:   Mon, 10 Sep 2018 13:01:34 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "Woodhouse, David" <dwmw@...zon.co.uk>,
        Andi Kleen <ak@...ux.intel.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        "Schaufler, Casey" <casey.schaufler@...el.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v5 2/2] x86/speculation: Enable cross-hyperthread spectre
 v2 STIBP mitigation

On Mon, 10 Sep 2018, Thomas Gleixner wrote:

> That looks much more palatable. One missing piece is the sysfs 
> mitigation file for spectre v2. That should reflect STIPB state as well.

FWIW, we're missing a bit more in that area, namely RSB stuffing on 
context switch, IBRS (even through only around fw) and IBPB; those are 
only signalled in dmesg during bootup.

Want to add all this stuff there?

Thanks,

-- 
Jiri Kosina
SUSE Labs