linux-kernel - Re: [PATCH 10/13] x86/alternative: Support indirect call replacement

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Message-ID: <5993ab2e-c877-b566-c860-00a405a823e1@zytor.com>
Date:   Fri, 17 Nov 2017 11:52:10 -0800
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Juergen Gross <jgross@...e.com>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sasha Levin <alexander.levin@...izon.com>,
        live-patching@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Mike Galbraith <efault@....de>,
        Chris Wright <chrisw@...s-sol.org>,
        Alok Kataria <akataria@...are.com>,
        Rusty Russell <rusty@...tcorp.com.au>,
        virtualization@...ts.linux-foundation.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        xen-devel@...ts.xenproject.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 10/13] x86/alternative: Support indirect call replacement

On 10/04/17 08:58, Josh Poimboeuf wrote:
> Add alternative patching support for replacing an instruction with an
> indirect call.  This will be needed for the paravirt alternatives.

I have a patchset that generalizes the alternatives in what I think is a
more robust way.  I really, really want to get rid of these hacks.  Let
me clean it up an post it...

	-hpa