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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,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 BD52DC43387 for ; Fri, 21 Dec 2018 19:29:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 89F3621906 for ; Fri, 21 Dec 2018 19:29:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="NiH4XFZu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404529AbeLUT3g (ORCPT ); Fri, 21 Dec 2018 14:29:36 -0500 Received: from mail.skyhub.de ([5.9.137.197]:55354 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390204AbeLUT3f (ORCPT ); Fri, 21 Dec 2018 14:29:35 -0500 Received: from zn.tnic (p200300EC2BD18000058FF39CF3603A95.dip0.t-ipconnect.de [IPv6:2003:ec:2bd1:8000:58f:f39c:f360:3a95]) (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 4B6101EC05EB; Fri, 21 Dec 2018 20:29:34 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1545420574; 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=JBtL0Vn/mS61dloUbe+mQ9k1BsRRf3IQ6GTGFoXrbgA=; b=NiH4XFZubhfo7YEp4TwwKGwfIqOuSd9BWEGSO5if7DtTVSBpX+h9Vxh+nqC4/gYV4rR6SJ TNchoqePVUQPku11SK6G6v7X9KMifwIkmQe6Eii2j7CyKRao7SmRTicoMaut64mhha5XRC 7coa17GYi0wDnM3vVeQ25tSWlFxgX28= Date: Fri, 21 Dec 2018 20:29:28 +0100 From: Borislav Petkov To: Ard Biesheuvel , matt@codeblueprint.co.uk Cc: "Prakhya, Sai Praneeth" , Ingo Molnar , "tglx@linutronix.de" , "x86@kernel.org" , "marc.zyngier@arm.com" , "eric.snowberg@oracle.com" , "hdegoede@redhat.com" , "Hansen, Dave" , "peterz@infradead.org" , "hpa@zytor.com" , "arend.vanspriel@broadcom.com" , "julien.thierry@arm.com" , "bhsharma@redhat.com" , "jonathanh@nvidia.com" , "joe@perches.com" , "torvalds@linux-foundation.org" , "natechancellor@gmail.com" , "luto@kernel.org" , "linux-kernel@vger.kernel.org" , "sedat.dilek@gmail.com" , "zhuyifei1999@gmail.com" , "linux-tip-commits@vger.kernel.org" Subject: Re: [tip:efi/core] x86/efi: Unmap EFI boot services code/data regions from efi_pgd Message-ID: <20181221192928.GM1325@zn.tnic> References: <20181129171230.18699-6-ard.biesheuvel@linaro.org> <20181221171308.GJ1325@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: 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 Fri, Dec 21, 2018 at 06:26:23PM +0100, Ard Biesheuvel wrote: > On Fri, 21 Dec 2018 at 18:13, Borislav Petkov wrote: > > > > On Fri, Dec 21, 2018 at 06:02:29PM +0100, Ard Biesheuvel wrote: > > > As far as I can tell, the SGI x86 UV platforms still rely on this, so > > > we're stuck with it for the foreseeable future. > > > > What happened with the old apple laptops which couldn't handle high > > virtual mappings and needed 1:1? We don't care anymore? > > > > If that is the case (I wouldn't know) then yes, there is a second > reason why we need to keep this code. Fleming knows details and he's on CC, lemme "pull" him up into To: :-) -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.