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=ham 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 D3ABAC2D0CF for ; Tue, 24 Dec 2019 10:04:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A439E2071A for ; Tue, 24 Dec 2019 10:04:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="F7NfYjT8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726352AbfLXKEb (ORCPT ); Tue, 24 Dec 2019 05:04:31 -0500 Received: from mail.skyhub.de ([5.9.137.197]:39508 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726128AbfLXKEb (ORCPT ); Tue, 24 Dec 2019 05:04:31 -0500 Received: from zn.tnic (p200300EC2F0ED600E4E5C00CE9FEB53D.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:d600:e4e5:c00c:e9fe:b53d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 47AE31EC0273; Tue, 24 Dec 2019 11:04:28 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1577181868; 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=lZBp7WJCTDYPOomy6Za4skPEqciE2e9sbtVlgHLZuQw=; b=F7NfYjT8T7RuQTVZZX4JYza98gxXNuJUZSmRdHlZ12yiRY3KZJgYpmHVLQEFgOXjwQ5QCy 1MFaouSTNo2iWf5/mbdUyCgmtdmVAYiNH0Ulj8Ci2/PlEXzNg8dFZvEBKlzjSehTG9UuR6 3QEBi6606+OQuFC3xIJ5Ft4HG7Fk0eY= Date: Tue, 24 Dec 2019 11:04:23 +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: <20191224100423.GC21017@zn.tnic> References: <20191205000957.112719-1-thgarnie@chromium.org> <20191205000957.112719-11-thgarnie@chromium.org> <20191223172350.GH16710@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20191223172350.GH16710@zn.tnic> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 23, 2019 at 06:23:50PM +0100, Borislav Petkov wrote: > 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 Whoops, it is in the comment above PARAVIRT_CALL_POST. I must've been blind yesterday. Forget what I said and sorry. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette