From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by spool.mail.gandi.net (Postfix) with ESMTPS id DE475AC142B for ; Fri, 12 Jan 2024 11:50:51 +0000 (UTC) DKIM-Signature: a=rsa-sha256; bh=oEQewxG5UTuKIlt9JGg4WtRXz0EOQVwv+QXxwhfiMKg=; c=relaxed/simple; d=groups.io; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:In-Reply-To:Precedence:List-Subscribe:List-Help:Sender:List-Id:Mailing-List:Delivered-To:Reply-To:List-Unsubscribe-Post:List-Unsubscribe:Content-Type:Content-Disposition; s=20140610; t=1705060250; v=1; b=xVEErROCiPYmh3nGos0q1FYChUtFLwr8gokxOxei02Ay3xoKKjqZkJKdd8OCidbQ+REaZ+es zxIrUBkVvXwvFEQGpFPh+nCtLaL05Nojkftja15hPziDRPsIk8JuzgGIIF96+L46v02iPMKYjkT WffBuasfObavtEgd/cnmjVJE= X-Received: by 127.0.0.2 with SMTP id SPHBYY7687511xCkNrh6Xf2N; Fri, 12 Jan 2024 03:50:50 -0800 X-Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mx.groups.io with SMTP id smtpd.web11.5330.1705060249860996031 for ; Fri, 12 Jan 2024 03:50:50 -0800 X-Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-218-Yw6RilYrO72UZYDvdh5wzQ-1; Fri, 12 Jan 2024 06:50:45 -0500 X-MC-Unique: Yw6RilYrO72UZYDvdh5wzQ-1 X-Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E583383B9C8; Fri, 12 Jan 2024 11:50:44 +0000 (UTC) X-Received: from sirius.home.kraxel.org (unknown [10.39.193.233]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C2FA32166B31; Fri, 12 Jan 2024 11:50:44 +0000 (UTC) X-Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 94FE1180079A; Fri, 12 Jan 2024 12:50:43 +0100 (CET) Date: Fri, 12 Jan 2024 12:50:43 +0100 From: "Gerd Hoffmann" To: Dun Tan Cc: devel@edk2.groups.io, Ray Ni , Laszlo Ersek , Rahul Kumar Subject: Re: [edk2-devel] [Patch V4] UefiCpuPkg:Limit PhysicalAddressBits in special case Message-ID: References: <20240112083142.230-1-dun.tan@intel.com> MIME-Version: 1.0 In-Reply-To: <20240112083142.230-1-dun.tan@intel.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Precedence: Bulk List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,kraxel@redhat.com List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: X-Gm-Message-State: mnjOC9WutMhvmAWgnKcLyqI8x7686176AA= Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-GND-Status: LEGIT Authentication-Results: spool.mail.gandi.net; dkim=pass header.d=groups.io header.s=20140610 header.b=xVEErROC; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=redhat.com (policy=none); spf=pass (spool.mail.gandi.net: domain of bounce@groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce@groups.io Hi, > + // > + // 4-level paging supports translating 48-bit linear addresses to 52-bit physical addresses. > + // Since linear addresses are sign-extended, the linear-address space of 4-level paging is: > + // [0, 2^47-1] and [0xffff8000_00000000, 0xffffffff_ffffffff]. > + // So only [0, 2^47-1] linear-address range maps to the identical physical-address range when > + // 5-Level paging is disabled. > + // > + ASSERT (PhysicalAddressBits <= 52); > + if (!Is5LevelPagingNeeded && (PhysicalAddressBits > 47)) { > + PhysicalAddressBits = 47; > + } Nice. Reviewed-by: Gerd Hoffmann take care, Gerd -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#113723): https://edk2.groups.io/g/devel/message/113723 Mute This Topic: https://groups.io/mt/103679520/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=-=-=-=-=-=-=-=-=-=-=-