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=-2.5 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 834DAC43441 for ; Sat, 10 Nov 2018 10:56:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5251F20883 for ; Sat, 10 Nov 2018 10:56:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5251F20883 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=alien8.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 S1729049AbeKJUlP (ORCPT ); Sat, 10 Nov 2018 15:41:15 -0500 Received: from mail.skyhub.de ([5.9.137.197]:48848 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728888AbeKJUlP (ORCPT ); Sat, 10 Nov 2018 15:41:15 -0500 X-Virus-Scanned: Nedap ESD1 at mail.skyhub.de Received: from mail.skyhub.de ([127.0.0.1]) by localhost (blast.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id XB17dEM59n6v; Sat, 10 Nov 2018 11:56:40 +0100 (CET) Received: from zn.tnic (p4FED3B23.dip0.t-ipconnect.de [79.237.59.35]) (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 06C771EC09AE; Sat, 10 Nov 2018 11:56:39 +0100 (CET) Date: Sat, 10 Nov 2018 11:54:22 +0100 From: Borislav Petkov To: Masayoshi Mizuma , "H. Peter Anvin" Cc: Baoquan He , Ingo Molnar , Thomas Gleixner , Chao Fan , linux-kernel@vger.kernel.org, x86@kernel.org, linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org, mingo@redhat.com, keescook@chromium.org, rjw@rjwysocki.net, lenb@kernel.org, ard.biesheuvel@linaro.org, indou.takao@jp.fujitsu.com, caoj.fnst@cn.fujitsu.com Subject: Re: [PATCH v8 0/3] x86/boot/KASLR: Parse ACPI table and limit kaslr in immovable memory Message-ID: <20181110105422.GA20023@zn.tnic> References: <20181016195429.tovdgqq77gz3eek2@gabell> <20181016195902.GK5212@zn.tnic> <20181022154204.kagmdb55jtoez4ca@gabell> <20181025103345.GF14020@nazgul.tnic> <20181025134050.ggiir77ehntikbwg@gabell> <20181106184519.GA16391@zn.tnic> <20181106193636.svyjwuwrlgnpuyyf@gabell> <20181106204511.GO13712@zn.tnic> <20181106222133.lb7674yzszivzihd@gabell> <20181108105129.GA7543@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20181108105129.GA7543@zn.tnic> 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 Thu, Nov 08, 2018 at 11:51:29AM +0100, Borislav Petkov wrote: > A global definition which doesn't need allocation? > > Maybe hpa would have another, better idea... ...and he has: just put that address in a new field in struct boot_params by converting one of the padding arrays there. Don't forget to document it in Documentation/x86/zero-page.txt This way you don't need any of the allocation fun or to use setup_data at all. HTH. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.