linux-hardening - Re: [PATCH] x86/paravirt: Remove clobber bitmask from .parainstructions

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Date:   Mon, 5 Sep 2022 10:09:55 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Srivatsa S. Bhat (VMware)" <srivatsa@...il.mit.edu>,
        Alexey Makhalov <amakhalov@...are.com>,
        VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, Bill Wendling <morbo@...gle.com>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] x86/paravirt: Remove clobber bitmask from
 .parainstructions

On 03.09.22 09:37, Kees Cook wrote:
> The u16 "clobber" value is not used in .parainstructions since commit
> 27876f3882fd ("x86/paravirt: Remove clobbers from struct paravirt_patch_site")
> 
> Remove the u16 from the section macro, the argument from all macros, and
> all now-unused CLBR_* macros.
> 
> Cc: Juergen Gross <jgross@...e.com>
> Cc: "Srivatsa S. Bhat (VMware)" <srivatsa@...il.mit.edu>
> Cc: Alexey Makhalov <amakhalov@...are.com>
> Cc: VMware PV-Drivers Reviewers <pv-drivers@...are.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: x86@...nel.org
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: Bill Wendling <morbo@...gle.com>
> Cc: virtualization@...ts.linux-foundation.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen

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