From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751587AbeCTRRm (ORCPT ); Tue, 20 Mar 2018 13:17:42 -0400 Received: from mga11.intel.com ([192.55.52.93]:12639 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751330AbeCTRRl (ORCPT ); Tue, 20 Mar 2018 13:17:41 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,336,1517904000"; d="scan'208";a="29696233" From: "Bae, Chang Seok" To: Andy Lutomirski CC: X86 ML , Andi Kleen , "H. Peter Anvin" , "Metzger, Markus T" , "Luck, Tony" , "Shankar, Ravi V" , LKML , Dave Hansen Subject: Re: [PATCH 13/15] x86/fsgsbase/64: With FSGSBASE, compare GS bases on paranoid_entry Thread-Topic: [PATCH 13/15] x86/fsgsbase/64: With FSGSBASE, compare GS bases on paranoid_entry Thread-Index: AQHTv61aFYaSukXqZEajMVMtZoAMNaPZnPEA//+lWwCAAAhkAA== Date: Tue, 20 Mar 2018 17:03:46 +0000 Message-ID: <09869EF2-48CC-4C66-A762-94C0C2B798E1@intel.com> References: <1521481767-22113-1-git-send-email-chang.seok.bae@intel.com> <1521481767-22113-14-git-send-email-chang.seok.bae@intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/10.b.0.180311 x-originating-ip: [10.254.178.80] Content-Type: text/plain; charset="utf-8" Content-ID: <2AAE629C9D53F742B28B8A6AB1134B54@intel.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id w2KHHkIf029954 On 3/20/18, 07:58, "Andy Lutomirski" wrote: > The original version of these patches (mine and Andi’s) didn’t have > this comparison, didn’t need RDMSR, and didn’t allow malicious user To be clear, RDMSR is not needed (with FSGSBASE)