linux-kernel - [patch RFC 0/5] x86/spectre_v2: Initial integration of IBRS into the spectre

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Message-Id: <20180110010652.404145126@linutronix.de>
Date:   Wed, 10 Jan 2018 02:06:52 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...uxfoundation.org>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...nel.org>,
        Arjan Van De Ven <arjan.van.de.ven@...el.com>
Subject: [patch RFC 0/5] x86/spectre_v2: Initial integration of IBRS into the
 spectre_v2 mechanics

I started to look at the IBRS series and this thing really needs a thorough
treatment with a steam blaster.

So I started that effort by integrating it proper into the existing spectre_v2
command line parsing and mitigation method selection.

It's not having any of the actual IBRS bits yet and is completely untested,
but I wanted to send it out before falling completely asleep so the folks
still awake can take a look and comment or expand/modify.

The first patch is from Boris to simplify the cpu feature bits sync after a
late microcode load, but it's not yet used. I just added it for reference
so people can see where this is heading.

I'll continue on that tomorrow morning after picking up a few patches here
and there.

Applies on top of

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

Thanks,

	tglx