linux-kernel - Re: [PATCH v2 2/8] x86/enter: MACROS to set/clear IBRS

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Message-ID: <20180107184458.lvu7mswc5q5dajoo@pd.tnic>
Date:   Sun, 7 Jan 2018 19:44:58 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Tim Chen <tim.c.chen@...ux.intel.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        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>,
        David Woodhouse <dwmw@...zon.co.uk>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/8] x86/enter: MACROS to set/clear IBRS

On Sun, Jan 07, 2018 at 09:12:21AM -0800, Tim Chen wrote:
> Currently we are not using other bits.
> When the time comes that we have other bits in this MSR used, we will
> change this.

Then please write in a short comment above it that it is ok that the
previous MSR contents get overwritten.

-- 
Regards/Gruss,
    Boris.

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