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[209.132.180.67]) by mx.google.com with ESMTP id h8-v6si18079152pls.94.2018.10.08.10.46.13; Mon, 08 Oct 2018 10:46:29 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=erCO+C8U; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726510AbeJIA6W (ORCPT + 99 others); Mon, 8 Oct 2018 20:58:22 -0400 Received: from mail-it1-f196.google.com ([209.85.166.196]:52491 "EHLO mail-it1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726391AbeJIA6W (ORCPT ); Mon, 8 Oct 2018 20:58:22 -0400 Received: by mail-it1-f196.google.com with SMTP id 134-v6so12586701itz.2 for ; Mon, 08 Oct 2018 10:45:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=p0ihHib7JrwgiKR6WGeZIF4tHJvBv5wG/tIjCcHeYes=; b=erCO+C8UGdUZ8CzkG6azwSF/Xx+EZtJxlF0bxE2kh5UEU4vS+ROE4elVcrVSD6y+lb 7GpAlZHfIxEy0p+AfXaZtmVAc8S/SEGgz8iZtnkG4D0S0XesH3sbP9m7IfxZ0VfrIJwu Y+6orr3VA3tookEe46WKv2bkNjHwLuLD6Ung8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=p0ihHib7JrwgiKR6WGeZIF4tHJvBv5wG/tIjCcHeYes=; b=ujR1bzpDRqAXLxpj+464XMxUkSOGsPeBPxpO7DcqraUqpEJX/WhMbYj9OdeSbxdV27 Z3Vp+7PPLcIGDbbqCrcJn1zeUphAVecawu/+qenLVpbTEcEcyJuEIzrycIMM5YLVvAYY i7C9U9MPdc9nClnkbPvkpYwzBCm8LgnY+ZoxA2xcu2ar1mH1Zkic0Lsz4wrUQkFeSVci T1spLgoYdub9djZuI1OLW2vXpOE2lR+pBdcB5kx5nGLsXGwQzgFsUXd+UhwIlKEPIfLK ojCyQpwaRTt7tFQfsx/PRZ68zm2LPi6zSuYMAYut3B0E1xKQHib7C4POTzuBUAqeYM2c gCjg== X-Gm-Message-State: ABuFfojG7axx+mdoPvp18T2s1fhMYBPHlfKrskK6JgoSBWFzWo13/Z2C pBBStudlIJpmjWtUNrGKmO0brw5bA2GX8iHEsP27Ng== X-Received: by 2002:a24:e08f:: with SMTP id c137-v6mr17648540ith.71.1539020732146; Mon, 08 Oct 2018 10:45:32 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a6b:5910:0:0:0:0:0 with HTTP; Mon, 8 Oct 2018 10:45:31 -0700 (PDT) In-Reply-To: References: <20181006015110.653946300@goodmis.org> <20181006015720.634688468@goodmis.org> <20181006121211.GA5663@hirez.programming.kicks-ass.net> <20181006093905.46276505@vmware.local.home> <20181008072134.GB5663@hirez.programming.kicks-ass.net> <20181008155757.GC5663@hirez.programming.kicks-ass.net> <20181008163953.GD5663@hirez.programming.kicks-ass.net> From: Ard Biesheuvel Date: Mon, 8 Oct 2018 19:45:31 +0200 Message-ID: Subject: Re: [POC][RFC][PATCH 1/2] jump_function: Addition of new feature "jump_function" To: Jiri Kosina Cc: Andy Lutomirski , Peter Zijlstra , Steven Rostedt , LKML , Linus Torvalds , Ingo Molnar , Andrew Morton , Thomas Gleixner , Masami Hiramatsu , Mathieu Desnoyers , Matthew Helsley , "Rafael J. Wysocki" , David Woodhouse , Paolo Bonzini , Josh Poimboeuf , Jason Baron , Andrew Lutomirski Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8 October 2018 at 19:44, Jiri Kosina 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 :-)