linux-kernel - Re: [POC][RFC][PATCH 1/2] jump_function: Addition of new feature "jump

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Message-ID: <CAKv+Gu97y1vrqWa-mACkMveJTqP23FJUy2M21Fv8-ZUAkbuqRQ@mail.gmail.com>
Date:   Mon, 8 Oct 2018 19:45:31 +0200
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Andy Lutomirski <luto@...capital.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Matthew Helsley <mhelsley@...are.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jason Baron <jbaron@...mai.com>,
        Andrew Lutomirski <luto@...nel.org>
Subject: Re: [POC][RFC][PATCH 1/2] jump_function: Addition of new feature "jump_function"

On 8 October 2018 at 19:44, Jiri Kosina <jikos@...nel.org> wrote:
> On Mon, 8 Oct 2018, Ard Biesheuvel wrote:
>
>> Does that mean that architectures could opt out of doing the whole
>> objtool + relocation processing thing, and instead take the hit of
>> going through the trampoline for all calls?
>
> There are architectures that aren't [currently] supported by objtool at
> all anyway.
>

That was kind of my point :-)