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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65BB8C7EE2E for ; Fri, 12 May 2023 11:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240732AbjELLE1 (ORCPT ); Fri, 12 May 2023 07:04:27 -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) Precedence: bulk List-ID: X-Mailing-List: linux-efi@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?