From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86D63C2D0C0 for ; Mon, 23 Dec 2019 17:24:21 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id DBDB0206CB for ; Mon, 23 Dec 2019 17:24:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="pvVxg2he" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DBDB0206CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=alien8.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-17513-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 7398 invoked by uid 550); 23 Dec 2019 17:24:11 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 7378 invoked from network); 23 Dec 2019 17:24:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1577121839; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=qCVgGYhpI8fuKjCs8j7FE3FBqgR2XtSUh+fcWzWH/VE=; b=pvVxg2hevIXfE5w6AjNWNNr06Hnx3RYJHHVwrf8s0r2xJThHa80f8RP/uGdow/GBBatTO/ EYQHW+V+LUNPOVQo4AsEyrZWC+tOHadjiSubJv/2LfgB6CoNxXenfr04LOHkgIuvLEbcEd YwwrPHo/fWJcekxP0Wf0T/oOtgxiBsQ= Date: Mon, 23 Dec 2019 18:23:50 +0100 From: Borislav Petkov To: Thomas Garnier Cc: kernel-hardening@lists.openwall.com, kristen@linux.intel.com, keescook@chromium.org, Juergen Gross , Thomas Hellstrom , "VMware, Inc." , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v10 10/11] x86/paravirt: Adapt assembly for PIE support Message-ID: <20191223172350.GH16710@zn.tnic> References: <20191205000957.112719-1-thgarnie@chromium.org> <20191205000957.112719-11-thgarnie@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20191205000957.112719-11-thgarnie@chromium.org> User-Agent: Mutt/1.10.1 (2018-07-13) On Wed, Dec 04, 2019 at 04:09:47PM -0800, Thomas Garnier wrote: > If PIE is enabled, switch the paravirt assembly constraints to be > compatible. The %c/i constrains generate smaller code so is kept by > default. > > Position Independent Executable (PIE) support will allow to extend the > KASLR randomization range below 0xffffffff80000000. > > Signed-off-by: Thomas Garnier > Acked-by: Juergen Gross > --- > arch/x86/include/asm/paravirt_types.h | 32 +++++++++++++++++++++++---- > 1 file changed, 28 insertions(+), 4 deletions(-) More missed feedback: https://lkml.kernel.org/r/CAJcbSZG-JhBC9b1JMv1zq2r5uRQipYLtkNjM67sd7=eqy_iOaA@mail.gmail.com -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette