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=-2.3 required=3.0 tests=BAYES_05,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,SPF_HELO_NONE autolearn=no 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 0BCC5C433B4 for ; Fri, 7 May 2021 01:47:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8C1A6105A for ; Fri, 7 May 2021 01:47:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234057AbhEGBsd (ORCPT ); Thu, 6 May 2021 21:48:33 -0400 Received: from usmail.montage-tech.com ([12.176.92.53]:59569 "EHLO usmail.montage-tech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234033AbhEGBsd (ORCPT ); Thu, 6 May 2021 21:48:33 -0400 X-MDAV-Result: clean X-MDAV-Processed: usmail.montage-tech.com, Thu, 06 May 2021 18:47:33 -0700 Received: from shmail.montage-tech.com by usmail.montage-tech.com with ESMTP id md5001005625861.msg; Thu, 06 May 2021 18:47:33 -0700 X-MDArrival-Date: Thu, 06 May 2021 18:47:33 -0700 X-Return-Path: prvs=17616916e5=david.dai@montage-tech.com X-Envelope-From: david.dai@montage-tech.com DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=montage-tech.com; s=MDaemon; t=1620352046; x=1620956846; i=david.dai@montage-tech.com; q=dns/txt; h=From:To:Cc:Subject: Date:Message-ID:MIME-Version:Content-Type: Content-Transfer-Encoding:Thread-Index:Content-Language; bh=L3Un rB+anJNjNP/B1rxssibRE0awsbP+NwB9L6IFo2k=; b=gbvXeSxwzs54aZW3uBQ/ JNOb1fDWUk6O5mSQpneTaPvtJL4JUXT2vZ8wWjbh4JHruIrbkDfJI0OBRlQKvsL7 3Oov8AKnKm5H8iC7fK26zhCAfdM6N/ty8AXuYsDpSDSPeh+HvO5GFsie0qyupm6+ 0nwFEiw+i9cQuQx0bbBZ97g= X-MDAV-Result: clean X-MDAV-Processed: shmail.montage-tech.com, Fri, 07 May 2021 09:47:26 +0800 Received: from cn021pc868 by shmail.montage-tech.com with ESMTPSA id pp5001016722846.msg; Fri, 07 May 2021 09:47:25 +0800 From: "Dai WeiBin \(David Dai\)" To: "'Ben Widawsky'" Cc: , "'Linux ACPI'" , "'Dan Williams'" Subject: CXL HDM alignment Date: Fri, 7 May 2021 09:43:47 +0800 Message-ID: <003501d742e2$6c331c50$449954f0$@montage-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 14.0 Thread-Index: AddC3+pLppO5NLuURmKWLV+pdj+tUw== Content-Language: zh-cn X-MDCFSigsAdded: montage-tech.com Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Hi Ben, I am sorry to disturb you for consulting you a question, my question is = how I can make CXL HDM 1G-size alignment, CXL specification defines HDM = is 256M alignment. >From my understanding, BIOS will allocate HPA and build ACPI SRAT for = CXL HDM, do we have any method to tell OS or BIOS to align HDM with 1G = size? I don't sure whether we can configure BIOS address allocation, but hope = any your suggestion and help! Thanks, David