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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED 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 5C004C43387 for ; Fri, 21 Dec 2018 17:26:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22D6E21939 for ; Fri, 21 Dec 2018 17:26:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="ZtNZpMFm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390212AbeLUR0g (ORCPT ); Fri, 21 Dec 2018 12:26:36 -0500 Received: from mail-io1-f49.google.com ([209.85.166.49]:33417 "EHLO mail-io1-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731522AbeLUR0f (ORCPT ); Fri, 21 Dec 2018 12:26:35 -0500 Received: by mail-io1-f49.google.com with SMTP id t24so4228964ioi.0 for ; Fri, 21 Dec 2018 09:26:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=EF3KDcq1OPKVRJUCo/GQmomuC/MhhwMGlFXLQ5IJr6s=; b=ZtNZpMFmKu434Gl6ywzPwp2wvGjhkWNwWyD4yfqOJGU4LNbp4daaq80Ue1b/NTJYPP r1dfBwiH9CDEgkzyba+FjbTHjSJ0P+U20rgYu8RWzEftVoIzp7W9nldCNcLj8kGCbXSk fw2xUXut8iB9nCLvpCtMCJiAOxzRdO2Cq6+o8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=EF3KDcq1OPKVRJUCo/GQmomuC/MhhwMGlFXLQ5IJr6s=; b=MZsSRjDg4PD+9njKEvafvYE7aCAmrr51F0weSyl+/e+CTzfA9dgS6HXRLCAdV6Qw3N HGECyEd8cemRxbl7UgFnJpXG7xh5H6vrGr9oq2SbzJc9GaAt/QOLWff8VObBjRWhGGW9 u8ktyRREXYuNx7zX/wnXLAxsdpS7IA7iCVPEb6cDtWxIkfB1KOzc035OP6FWDAeKkNmc X7CL9aPZipIVLFHND8VQsnnPWxtVzqQFHwdaKozZU5Fi+GouV86gxLzndFXVmT3a7uhD Oqh3INEQKtcMGCQNFEo0gKpto4PVolScbkM6KOLkJ6xdfRy425OY1C3KLTPxE91j5I8h /S0A== X-Gm-Message-State: AJcUukcPWZOFPh3tuk2dHca9BWuEnBbSQmGNkpEAX4Q2Vj9d/ipiO71i bRjqDE411TlcSH17OOhhdkTPbIosxlEvLiu3mfZMeQ== X-Google-Smtp-Source: ALg8bN6GT0vHICydfCxuIO6bJUd9Q0eSa0DJPlSlzJ3G50yA8u/Df26YVafvkP03QFuGtRJppgyEKJRm5dXaRz/RCno= X-Received: by 2002:a5e:cb0b:: with SMTP id p11mr2365554iom.60.1545413194360; Fri, 21 Dec 2018 09:26:34 -0800 (PST) MIME-Version: 1.0 References: <20181129171230.18699-6-ard.biesheuvel@linaro.org> <20181221171308.GJ1325@zn.tnic> In-Reply-To: <20181221171308.GJ1325@zn.tnic> From: Ard Biesheuvel Date: Fri, 21 Dec 2018 18:26:23 +0100 Message-ID: Subject: Re: [tip:efi/core] x86/efi: Unmap EFI boot services code/data regions from efi_pgd To: Borislav Petkov 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" , "matt@codeblueprint.co.uk" , "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" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.