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Date:   Wed, 25 Oct 2023 08:27:54 -0700
From:   Pawan Gupta <>
To:     Peter Zijlstra <>
Cc:     Andrew Cooper <>,
        Thomas Gleixner <>,
        Ingo Molnar <>, Borislav Petkov <>,
        Dave Hansen <>,,
        "H. Peter Anvin" <>,
        Josh Poimboeuf <>,
        Andy Lutomirski <>,
        Jonathan Corbet <>,
        Sean Christopherson <>,
        Paolo Bonzini <>,,,,,,,
        Alyssa Milburn <>,
        Daniel Sneddon <>,,
        Alyssa Milburn <>
Subject: Re: [RESEND][PATCH 1/6] x86/bugs: Add asm helpers for executing VERW

On Wed, Oct 25, 2023 at 09:22:55AM +0200, Peter Zijlstra wrote:
> I'm thinking you need to at the very least stay in a section that's
> actually still mapped with PTI :-)
> .entry.text is the only thing that is reliably mapped with PTI (IIRC),
> some configs also get a chunk of the kernel image, but not all.
> Something like the below should do I suppose.

Thanks, will do this with Andrew's improvements.

> ---
>  arch/x86/entry/entry.S | 15 +++++++++++++++

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