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 40787C32789 for ; Tue, 6 Nov 2018 12:10:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 131832083D for ; Tue, 6 Nov 2018 12:10:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 131832083D 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 S2388122AbeKFVf0 (ORCPT ); Tue, 6 Nov 2018 16:35:26 -0500 Received: from mail.skyhub.de ([5.9.137.197]:42970 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387963AbeKFVfZ (ORCPT ); Tue, 6 Nov 2018 16:35:25 -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 ohYYp2TqE8Hw; Tue, 6 Nov 2018 13:10:29 +0100 (CET) Received: from zn.tnic (p200300EC2BD1C800329C23FFFEA6A903.dip0.t-ipconnect.de [IPv6:2003:ec:2bd1:c800:329c:23ff:fea6:a903]) (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 117AB1EC0979; Tue, 6 Nov 2018 13:10:29 +0100 (CET) Date: Tue, 6 Nov 2018 13:10:23 +0100 From: Borislav Petkov To: Masayoshi Mizuma 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, hpa@zytor.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: <20181106121023.GF13712@zn.tnic> References: <20181013214550.ag5qzokhkrkwnzsy@gabell> <20181013220541.GI31650@zn.tnic> <20181015005035.z3xym6nx43hogdge@gabell> <20181016151353.punyk7exekut2543@gabell> <20181016191113.GI5212@zn.tnic> <20181016195429.tovdgqq77gz3eek2@gabell> <20181016195902.GK5212@zn.tnic> <20181022154204.kagmdb55jtoez4ca@gabell> <20181025103345.GF14020@nazgul.tnic> <20181025134050.ggiir77ehntikbwg@gabell> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20181025134050.ggiir77ehntikbwg@gabell> 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, Oct 25, 2018 at 09:40:51AM -0400, Masayoshi Mizuma wrote: > My actual use case is for EFI boxes, however, I think it's better to useful > for legacy BIOS as well because memory hot-plug affinity in SRAT and KASLR > are available on legacy BIOS. > Actually, we can create such environment in qemu. Ah, right, qemu. :) > I have another idea to solve this issue. Adding a SRAT parsing code > to arch/x86/mm/kaslr.c. It is useful for both EFI and BIOS and > also we don't need a new kernel parameter... > Dose the idea make sense? The more automatic stuff we do and we don't have to involve the user, the better. However, lemme look at Chao's current patchset first - we should not go nuts by putting SRAT parsing everywhere :) -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.