Received: by 2002:a05:6358:9144:b0:117:f937:c515 with SMTP id r4csp10117960rwr; Fri, 12 May 2023 04:11:57 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5I3ZXop02xQ8wjKpA1usDa97bLeFHJoQIfGy6CqqqVEuWtkrzMoryXoC9GBxB4r7cWPPZU X-Received: by 2002:a05:6a20:3d82:b0:104:2200:8949 with SMTP id s2-20020a056a203d8200b0010422008949mr5365006pzi.56.1683889917570; Fri, 12 May 2023 04:11:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683889917; cv=none; d=google.com; s=arc-20160816; b=VZ/jVle9OF5I3+yijvYcPQD/BQeFi8t0Cz9asVzAq3WiIe90kbCfG9PhDHKZEu1jB0 dM33gbOWuV4lX2x+joEGftUipiz1CFADt0HyRhEcXYE7icxAImOfCuEaX7gk9ipKPIXU TUdj6dBRGSi5F3eEPPl1MsMCSrO4FqntB0qF7v0bD5fpAUcTww0wwZEy25u9JSZYXhs0 LmBfUMmaMckx+spY0bBsjKwI79gWRHNIi93b/KJbEyuHwkbOdSSHtcEwAJz5SYFKpyBv ZA79toEIrPPZlXC7SiRODcTxuEx9h7aHMa4IAG8J3SEIgOsb/9ZNvUNzrh9FNiECzqQU 8ZQQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date; bh=73TKKcgdhdtwWZ6dretCYkZIreZ3a+/CM1soAZlTwv4=; b=Tp8NB28hqeInmTF8H3liy6XjKNNwDk5VHuU9W8nB8dBuCVxwN4KbGFI2Y2OgS8E4W7 Quhg3EuU1GuZOZoH73H00En6JgRC2CEWiOk2mYVHj0ETSsd8i36G1GSNhXW/8SZVg83X qx5jlSnd//BBwlIIJLB6ofsoxuNsGBosSODuOg4rwIOdnwLVnbS3lfxlcYYMRBX8lZrw UO6sr8hdTLdLiEASzRxMZTvswjXfQoTw5VxCpEE9IXFuk6rhEc9OtKQ96qphQ5+MpHI/ li5bZ49B+wYSgeLHHZDUW+EBV1Fxt1Iq9Cop71/veNl3EKaM5a3xQaCYNVxGvumJ+5t1 yGjQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-crypto-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id e8-20020a636908000000b005300dbf81d4si8830495pgc.823.2023.05.12.04.11.45; Fri, 12 May 2023 04:11:57 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-crypto-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240956AbjELLE2 (ORCPT + 99 others); Fri, 12 May 2023 07:04:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240091AbjELLE0 (ORCPT ); Fri, 12 May 2023 07:04:26 -0400 X-Greylist: delayed 252 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 12 May 2023 04:04:20 PDT Received: from cavan.codon.org.uk (irc.codon.org.uk [IPv6:2a00:1098:84:22e::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBB995BB7; Fri, 12 May 2023 04:04:19 -0700 (PDT) Received: by cavan.codon.org.uk (Postfix, from userid 1000) id 3B95440A6F; Fri, 12 May 2023 11:47:53 +0100 (BST) Date: Fri, 12 May 2023 11:47:53 +0100 From: Matthew Garrett To: Ross Philipson Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, iommu@lists.linux-foundation.org, kexec@lists.infradead.org, linux-efi@vger.kernel.org, dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, ardb@kernel.org, James.Bottomley@hansenpartnership.com, luto@amacapital.net, nivedita@alum.mit.edu, kanth.ghatraju@oracle.com, trenchboot-devel@googlegroups.com Subject: Re: [PATCH v6 02/14] Documentation/x86: Secure Launch kernel documentation Message-ID: <20230512104753.GA14461@srcf.ucam.org> References: <20230504145023.835096-1-ross.philipson@oracle.com> <20230504145023.835096-3-ross.philipson@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230504145023.835096-3-ross.philipson@oracle.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,KHOP_HELO_FCRDNS,SPF_HELO_NEUTRAL, SPF_NEUTRAL,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org On Thu, May 04, 2023 at 02:50:11PM +0000, Ross Philipson wrote: > +Secure Launch does not interoperate with KASLR. If possible, the MLE should be > +built with KASLR disabled:: Why does Secure Launch not interoperate with KASLR? Re: IOMMUs > +It is recommended that no other command line options should be set to override > +the defaults above. What happens if they are? Does doing so change the security posture of the system? If so, will the measurements be different in a way that demonstrates the system is in an insecure state?