linux-kernel - Re: [PATCH 2/7] x86/enter: MACROS to set/clear IBRS

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Date:   Thu, 4 Jan 2018 14:23:42 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Tim Chen <tim.c.chen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        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 2/7] x86/enter: MACROS to set/clear IBRS

On 01/04/2018 02:21 PM, Tim Chen wrote:
>> Does this really have to live outside of arch/x86/entry/ ?
>>
> There are some inline C routines later in this file
> that will be needed by other functions.  Want to consolidate
> them in the same file.

We could put all of the assembly into calling.h along with the PTI
assembly.  Seems as sane a place as anywhere else to put it.