Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751231AbdHCJEU (ORCPT ); Thu, 3 Aug 2017 05:04:20 -0400 Received: from [183.91.158.132] ([183.91.158.132]:46662 "EHLO heian.cn.fujitsu.com" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751067AbdHCJES (ORCPT ); Thu, 3 Aug 2017 05:04:18 -0400 X-IronPort-AV: E=Sophos;i="5.41,315,1498492800"; d="scan'208";a="22163779" Date: Thu, 3 Aug 2017 17:03:59 +0800 From: Chao Fan To: Dou Liyang CC: , , , , , , , , , , , , "Rafael J., Wysocki" , "Zheng, Lv" , ACPI Devel Maling List Subject: Re: [POC] Get acpi table to limit memory scope chosen by KASLR to home SB when "movable_node" is specified Message-ID: <20170803090359.GF25014@localhost.localdomain> References: <20170803085155.GE25014@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.8.3 (2017-05-23) X-Originating-IP: [10.167.226.75] X-yoursite-MailScanner-ID: 4633A4724E4C.A8D07 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: fanc.fnst@cn.fujitsu.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1231 Lines: 44 On Thu, Aug 03, 2017 at 04:59:26PM +0800, Dou Liyang wrote: >Cc ACPI maintainers and mail list So many thanks. > >At 08/03/2017 04:51 PM, Chao Fan wrote: >> Hi all, >> >> Here is an issue about movable_node and KASLR. >> Currently, KASLR works well with "mem=", by which we can limit the scope of >> memory chosen by KASLR. But if we use "movable_node" independently without >> "mem=", we don't know the scope of memory in the home SB, which will cause >> the memory of hotplug SB may be chosen by KASLR. >> To solve this problem, I want to do this job: >> If "movable_node" is specified, try to get the acpi table and find the scope >> of memory in home SB, then set "mem_limit". >> >> The order of getting table is: >> boot_params >> \-systab >> \-efi tables >> \-rsdp >> \-rsdt or xsdt >> \-acpi root table list >> \-acpi srat mem affinity >> I am not sure if it's good to do this job in this period, so I want to get the feedback of community. Thanks, Chao Fan >> I am not sure if it's OK for community. >> If there are any problems, please let me know. >> Any comments will be welcome. >> >> Thanks, >> Chao Fan >> >> >>