linux-kernel - Re: [PATCH v2 0/8] IBRS patch series

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Message-ID: <1515240670.29312.245.camel@amazon.co.uk>
Date:   Sat, 6 Jan 2018 12:11:10 +0000
From:   "Woodhouse, David" <dwmw@...zon.co.uk>
To:     Tim Chen <tim.c.chen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>
CC:     Dave Hansen <dave.hansen@...el.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Arjan Van De Ven <arjan.van.de.ven@...el.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/8] IBRS patch series

On Fri, 2018-01-05 at 18:12 -0800, Tim Chen wrote:
> Tim Chen (8):
>   x86/feature: Detect the x86 IBRS feature to control Speculation
>   x86/enter: MACROS to set/clear IBRS
>   x86/enter: Use IBRS on syscall and interrupts
>   x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature
>   x86/idle: Disable IBRS entering idle and enable it on wakeup
>   x86/microcode: Recheck IBRS features on microcode reload
>   x86: Do not use dynamic IBRS if retpoline is enabled
>   x86: Use IBRS for firmware update path

.. where's the KVM bit? We need to set IBRS on vmexit too.
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