Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp1521050ybt; Thu, 9 Jul 2020 08:57:46 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwsRlHzQR2Od91oC6Bq0ezVc/2u98LuQ/RLTmldAEsm/XOJi4S1aTpQ25vUzIdEFn1f6p71 X-Received: by 2002:a50:cbcd:: with SMTP id l13mr55390398edi.384.1594310266184; Thu, 09 Jul 2020 08:57:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1594310266; cv=none; d=google.com; s=arc-20160816; b=ffFapHVqq3Fsin1B0RsGtaph7rBi2FqBwZoXxsObQQKFq+fiSfRh7owG91uj4Fw1i5 kVrw4z+aCoyrHtPdJ4i5D2c2bLkwr7MRoRJ7AH456nf7HfWQ3TZ0EJRMYjJYqu5KQFU9 lqYh6FMToRgyGdjfnKi+KuE8q8T7/ZVazRenv/rMxhJJr+BXQU/qH6dcbQmjNmDMyHOf G+qmb7CSmK44isJilA3Oo4R3+ERbzuOvm9frsVJO4xt8FXJfpslf5O7mYVDxYoz4d+uJ Fh91yPcY0C1Zi4ch/Zph5Q+/BX8/iuuEWvGCGSbkUhbAW5EwIC2OlYfVYEhvwsBdJ2M6 pGjw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:autocrypt:from:references:cc:to:subject:ironport-sdr :ironport-sdr; bh=4A7p2DGRu7M+nwi5wTr3V7a/pfLKJvci/7ck5tsH8VM=; b=zCJ3ilCkIAyMeFk/JmTfrFYP2eDf9/g5scJWnUY2M4KYWctHKihgGa0nBHaPFA/uqj 3kVhRNN/Di3MlN8rOnoIVe4uQerDGUWszE/pYi+Pa7D4HaYBd/iY9IaUD79oYIz8lrB3 ZlwC0iblxD0Y4Q3xt2R4a+Xo86vIrTE1s55N8puN7nH5/Do4TvJk4u72JMfClFPA+0b+ Tyw9Avs8q1ncca7TDLG6KhJQt3etQatNbcCZ5gafMnqb8G6MkPjJFIK3WTeOTvpZrbzB +T1TKtgckFYcRKN/5pbHK49QBEnP/lr/d88JjIShZBSK6dsadQi03fELHsvr110Iz78l Xyhg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u9si2068420ejx.100.2020.07.09.08.57.21; Thu, 09 Jul 2020 08:57:46 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728158AbgGIP4r (ORCPT + 99 others); Thu, 9 Jul 2020 11:56:47 -0400 Received: from mga09.intel.com ([134.134.136.24]:23655 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726497AbgGIP4q (ORCPT ); Thu, 9 Jul 2020 11:56:46 -0400 IronPort-SDR: KJ5JUa9LgJItBeKe4rz4UdWgIFA7ASNj0VMyyNiUfpy9bFo72UXCey1lqpNVQm6+rJTF31O1Zb O003PTgXeGjw== X-IronPort-AV: E=McAfee;i="6000,8403,9677"; a="149508395" X-IronPort-AV: E=Sophos;i="5.75,331,1589266800"; d="scan'208";a="149508395" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jul 2020 08:56:45 -0700 IronPort-SDR: myidNpIhd1R1WE/IoJ0NU3MH9h/JFnLjAMF9TUaQ9XtENmEVFAn/2BKF5Y0USxBlSvjYwlbBtD /q5r4e4h2r8g== X-IronPort-AV: E=Sophos;i="5.75,331,1589266800"; d="scan'208";a="457952181" Received: from srinatha-mobl1.amr.corp.intel.com (HELO [10.255.5.187]) ([10.255.5.187]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jul 2020 08:56:40 -0700 Subject: Re: [PATCH 2/4] KVM: x86: Introduce paravirt feature CR0/CR4 pinning To: "Andersen, John" , Paolo Bonzini Cc: Sean Christopherson , corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, shuah@kernel.org, liran.alon@oracle.com, drjones@redhat.com, rick.p.edgecombe@intel.com, kristen@linux.intel.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, mchehab+huawei@kernel.org, gregkh@linuxfoundation.org, paulmck@kernel.org, pawan.kumar.gupta@linux.intel.com, jgross@suse.com, mike.kravetz@oracle.com, oneukum@suse.com, luto@kernel.org, peterz@infradead.org, fenghua.yu@intel.com, reinette.chatre@intel.com, vineela.tummalapalli@intel.com, dave.hansen@linux.intel.com, arjan@linux.intel.com, caoj.fnst@cn.fujitsu.com, bhe@redhat.com, nivedita@alum.mit.edu, keescook@chromium.org, dan.j.williams@intel.com, eric.auger@redhat.com, aaronlewis@google.com, peterx@redhat.com, makarandsonare@google.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-hardening@lists.openwall.com References: <20200617190757.27081-1-john.s.andersen@intel.com> <20200617190757.27081-3-john.s.andersen@intel.com> <0fa9682e-59d4-75f7-366f-103d6b8e71b8@intel.com> <20200618144314.GB23@258ff54ff3c0> <124a59a3-a603-701b-e3bb-61e83d70b20d@intel.com> <20200707211244.GN20096@linux.intel.com> <19b97891-bbb0-1061-5971-549a386f7cfb@intel.com> <31eb5b00-9e2a-aa10-0f20-4abc3cd35112@redhat.com> <20200709154412.GA25@64c96d3be97b> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzShEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gPGRhdmVAc3I3MS5uZXQ+wsF7BBMBAgAlAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAUCTo3k0QIZAQAKCRBoNZUwcMmSsMO2D/421Xg8pimb9mPzM5N7khT0 2MCnaGssU1T59YPE25kYdx2HntwdO0JA27Wn9xx5zYijOe6B21ufrvsyv42auCO85+oFJWfE K2R/IpLle09GDx5tcEmMAHX6KSxpHmGuJmUPibHVbfep2aCh9lKaDqQR07gXXWK5/yU1Dx0r VVFRaHTasp9fZ9AmY4K9/BSA3VkQ8v3OrxNty3OdsrmTTzO91YszpdbjjEFZK53zXy6tUD2d e1i0kBBS6NLAAsqEtneplz88T/v7MpLmpY30N9gQU3QyRC50jJ7LU9RazMjUQY1WohVsR56d ORqFxS8ChhyJs7BI34vQusYHDTp6PnZHUppb9WIzjeWlC7Jc8lSBDlEWodmqQQgp5+6AfhTD kDv1a+W5+ncq+Uo63WHRiCPuyt4di4/0zo28RVcjtzlGBZtmz2EIC3vUfmoZbO/Gn6EKbYAn rzz3iU/JWV8DwQ+sZSGu0HmvYMt6t5SmqWQo/hyHtA7uF5Wxtu1lCgolSQw4t49ZuOyOnQi5 f8R3nE7lpVCSF1TT+h8kMvFPv3VG7KunyjHr3sEptYxQs4VRxqeirSuyBv1TyxT+LdTm6j4a mulOWf+YtFRAgIYyyN5YOepDEBv4LUM8Tz98lZiNMlFyRMNrsLV6Pv6SxhrMxbT6TNVS5D+6 UorTLotDZKp5+M7BTQRUY85qARAAsgMW71BIXRgxjYNCYQ3Xs8k3TfAvQRbHccky50h99TUY sqdULbsb3KhmY29raw1bgmyM0a4DGS1YKN7qazCDsdQlxIJp9t2YYdBKXVRzPCCsfWe1dK/q 66UVhRPP8EGZ4CmFYuPTxqGY+dGRInxCeap/xzbKdvmPm01Iw3YFjAE4PQ4hTMr/H76KoDbD cq62U50oKC83ca/PRRh2QqEqACvIH4BR7jueAZSPEDnzwxvVgzyeuhwqHY05QRK/wsKuhq7s UuYtmN92Fasbxbw2tbVLZfoidklikvZAmotg0dwcFTjSRGEg0Gr3p/xBzJWNavFZZ95Rj7Et db0lCt0HDSY5q4GMR+SrFbH+jzUY/ZqfGdZCBqo0cdPPp58krVgtIGR+ja2Mkva6ah94/oQN lnCOw3udS+Eb/aRcM6detZr7XOngvxsWolBrhwTQFT9D2NH6ryAuvKd6yyAFt3/e7r+HHtkU kOy27D7IpjngqP+b4EumELI/NxPgIqT69PQmo9IZaI/oRaKorYnDaZrMXViqDrFdD37XELwQ gmLoSm2VfbOYY7fap/AhPOgOYOSqg3/Nxcapv71yoBzRRxOc4FxmZ65mn+q3rEM27yRztBW9 AnCKIc66T2i92HqXCw6AgoBJRjBkI3QnEkPgohQkZdAb8o9WGVKpfmZKbYBo4pEAEQEAAcLB XwQYAQIACQUCVGPOagIbDAAKCRBoNZUwcMmSsJeCEACCh7P/aaOLKWQxcnw47p4phIVR6pVL e4IEdR7Jf7ZL00s3vKSNT+nRqdl1ugJx9Ymsp8kXKMk9GSfmZpuMQB9c6io1qZc6nW/3TtvK pNGz7KPPtaDzvKA4S5tfrWPnDr7n15AU5vsIZvgMjU42gkbemkjJwP0B1RkifIK60yQqAAlT YZ14P0dIPdIPIlfEPiAWcg5BtLQU4Wg3cNQdpWrCJ1E3m/RIlXy/2Y3YOVVohfSy+4kvvYU3 lXUdPb04UPw4VWwjcVZPg7cgR7Izion61bGHqVqURgSALt2yvHl7cr68NYoFkzbNsGsye9ft M9ozM23JSgMkRylPSXTeh5JIK9pz2+etco3AfLCKtaRVysjvpysukmWMTrx8QnI5Nn5MOlJj 1Ov4/50JY9pXzgIDVSrgy6LYSMc4vKZ3QfCY7ipLRORyalFDF3j5AGCMRENJjHPD6O7bl3Xo 4DzMID+8eucbXxKiNEbs21IqBZbbKdY1GkcEGTE7AnkA3Y6YB7I/j9mQ3hCgm5muJuhM/2Fr OPsw5tV/LmQ5GXH0JQ/TZXWygyRFyyI2FqNTx4WHqUn3yFj8rwTAU1tluRUYyeLy0ayUlKBH ybj0N71vWO936MqP6haFERzuPAIpxj2ezwu0xb1GjTk4ynna6h5GjnKgdfOWoRtoWndMZxbA z5cecg== Message-ID: Date: Thu, 9 Jul 2020 08:56:39 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200709154412.GA25@64c96d3be97b> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/9/20 8:44 AM, Andersen, John wrote: > > Bits which are allowed to be pinned default to WP for CR0 and SMEP, > SMAP, and UMIP for CR4. I think it also makes sense to have FSGSBASE in this set. I know it hasn't been tested, but I think we should do the legwork to test it. If not in this set, can we agree that it's a logical next step?