From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751088AbcL2Ujc (ORCPT ); Thu, 29 Dec 2016 15:39:32 -0500 Received: from outbound.smtp.vt.edu ([198.82.183.121]:37954 "EHLO omr2.cc.vt.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750833AbcL2Uja (ORCPT ); Thu, 29 Dec 2016 15:39:30 -0500 X-Mailer: exmh version 2.8.0 04/21/2012 with nmh-1.6+dev To: Liang Li Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, kirill.shutemov@linux.intel.com, dave.hansen@linux.intel.com, guangrong.xiao@linux.intel.com, pbonzini@redhat.com, rkrcmar@redhat.com Subject: Re: [PATCH RFC 0/4] 5-level EPT From: Valdis.Kletnieks@vt.edu In-Reply-To: <1483003563-25847-1-git-send-email-liang.z.li@intel.com> References: <1483003563-25847-1-git-send-email-liang.z.li@intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1483043915_31020P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Thu, 29 Dec 2016 15:38:36 -0500 Message-ID: <181888.1483043916@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --==_Exmh_1483043915_31020P Content-Type: text/plain; charset=us-ascii On Thu, 29 Dec 2016 17:25:59 +0800, Liang Li said: > x86-64 is currently limited physical address width to 46 bits, which > can support 64 TiB of memory. Some vendors require to support more for > some use case. Intel plans to extend the physical address width to > 52 bits in some of the future products. Can you explain why this patchset mentions 52 bits in some places, and 57 in others? Is it because there are currently in-process chipsets that will do 52, but you want to future-proof it by extending it to 57 so future chipsets won't need more work? Or is there some other reason? --==_Exmh_1483043915_31020P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.5 07/13/2001 iQEVAwUBWGV0S40DS38y7CIcAQJZzwf/YJjK/fVd3e37UZSI8mwgt8hvlqg2d2ht 5Wuw6lWhvdPRpcaRxP0Xyph8BxlCARjJ9gpIJDlunou2RPaeHde67sDR9m2Y6ClB l/6Vbzq8hgfffwiCDI/Jq8g94dpb2rnfsUdMARfd/oL1aWiE8UlCF7QKC8+HkO3g z7YgPjg+Tg2RmtjwIF0pUrgyGz70hdnYseXBhFpUPYoW6ZyzOCNp7O0fQXf9h5TL HyfdzW+3YRtzDsOA/I7q9JvV94K7x1Pd3a4W+0+DPgIb0kdh6+gCgKOklEZoCq4c aARWEsKOSoPvcsR2PzPZnmOoqQ6+1+s+Ykzwm2p4vmglW15UG90xUQ== =Ycrb -----END PGP SIGNATURE----- --==_Exmh_1483043915_31020P--