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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 C1A73C6778A for ; Tue, 3 Jul 2018 21:46:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 65637243D2 for ; Tue, 3 Jul 2018 21:46:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 65637243D2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753346AbeGCVqN (ORCPT ); Tue, 3 Jul 2018 17:46:13 -0400 Received: from mx2.suse.de ([195.135.220.15]:38384 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752839AbeGCVqL (ORCPT ); Tue, 3 Jul 2018 17:46:11 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id ADD66ADD9; Tue, 3 Jul 2018 21:46:09 +0000 (UTC) Date: Tue, 3 Jul 2018 23:46:05 +0200 From: Borislav Petkov To: Brijesh Singh Cc: Ard Biesheuvel , the arch/x86 maintainers , linux-efi , Linux Kernel Mailing List , Tom Lendacky , Thomas Gleixner , KVM devel mailing list , Matt Fleming , Andy Lutomirski Subject: Re: [PATCH] x86/efi: Access EFI MMIO data as unencrypted when SEV is active Message-ID: <20180703214604.GA15516@zn.tnic> References: <1530624720-32004-1-git-send-email-brijesh.singh@amd.com> <20180703154418.GC4643@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 03, 2018 at 04:16:57PM -0500, Brijesh Singh wrote: > I agree with Ard,  it may be good idea to extend the UEFI spec to > include encryption information. Having this information may be helpful > in some cases, e.g if we ever need to map a specific non IO memory as > unencrypted. So far we have not seen the need for it. But I will ask AMD > folks working closely with UEFI committee to float this and submit it as > enhancement in Tianocore BZ. Except that if the IO memory handling unencrypted changes in future incarnations, the changes to the spec become moot. I'm just saying... -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --