Received: by 2002:a05:6a10:17d3:0:0:0:0 with SMTP id hz19csp2732167pxb; Mon, 19 Apr 2021 12:27:32 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzF9qousI7wUAK3asj97rEEijmDe8q11EXLk4WeNM1eqtqp7oZsZfQue4ZJ3HKUvBgAClTD X-Received: by 2002:a62:8485:0:b029:1fc:d912:67d6 with SMTP id k127-20020a6284850000b02901fcd91267d6mr21255428pfd.80.1618860452541; Mon, 19 Apr 2021 12:27:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1618860452; cv=none; d=google.com; s=arc-20160816; b=KTaXq1bvyuxqFgYEWYzDR1foSnTelFGh5TPlwNdXptMZRCEA3B/E16dmdSmBDCT5lz hKAc36Az0yMAijhBoIzJb0faCxtMmqmC46TJTW0ru3mSIEKBLqWquVEADWKwRcR0fZY5 qPl8nRUg7PjxzmzK3uUSrfZoPfsVilVZflgZIxbjrdzNwcFYfTBw68g9LQR1+qwz8uiL vqpdRETpajS/ruGvEHbR+5fd9U9HoGUeYcUvmyZU1BtAEp0UViheDibiyju5qEWlLjwa yQv8uQsop5zOJ5Hdqqs/d/T5/RFU0SPp3i1py5rWnXHgQxMxc07DekIRq5BbU9WxoEcQ XbVQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :mime-version:accept-language:in-reply-to:references:message-id:date :thread-index:thread-topic:subject:cc:to:from; bh=Q8+AsoxOCpc9010sNPIkgaVPur5Hd/MXSWuLdzZSK50=; b=URDc9Tw9nySs3yAWU3yL1yPIdQloRpvcIBAWRGCFcWoMOFqLb5vNSK4uyItMQQaxvR 7gZlFrI5pUOx7H7MFnDRVEhJIVfYX4rtgo1IJiJnW3hzXrEp99ItEXMQGUTSNDeBlZTw 7W06dx/XS6NoK88evOpOEfe40EAXCqBeqc/KCm5fsw0w93CdOto8u+CNuRVcWj699To+ AS3whsf6wZfYj2vippUYL/T9F1G+I7OBa7sTdffdi7Hm6Hflu2zyTByhj+alZBFcUec8 UtKk9VbHOJZJ7msOOaU3bRjsBkOVSaqQB+y7UZ2P6XEikqst+e9kWBjrOSj6kWaLJ7q+ dkyg== 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=aculab.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id v4si18083491pgr.472.2021.04.19.12.27.20; Mon, 19 Apr 2021 12:27:32 -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=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239933AbhDSP1L (ORCPT + 99 others); Mon, 19 Apr 2021 11:27:11 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:26253 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233733AbhDSP1K (ORCPT ); Mon, 19 Apr 2021 11:27:10 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-83-1fpuH_pNMbiwBnHi01lYDQ-1; Mon, 19 Apr 2021 16:26:37 +0100 X-MC-Unique: 1fpuH_pNMbiwBnHi01lYDQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 19 Apr 2021 16:26:36 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.015; Mon, 19 Apr 2021 16:26:36 +0100 From: David Laight To: 'Andy Lutomirski' , Thomas Gleixner CC: Kees Cook , Borislav Petkov , "Sami Tolvanen" , X86 ML , Josh Poimboeuf , Peter Zijlstra , "Nathan Chancellor" , Nick Desaulniers , Sedat Dilek , "linux-hardening@vger.kernel.org" , LKML , clang-built-linux Subject: RE: [PATCH 05/15] x86: Implement function_nocfi Thread-Topic: [PATCH 05/15] x86: Implement function_nocfi Thread-Index: AQHXM+diuSsNstP2FUia6sIzu9nmdKq7+HvQ Date: Mon, 19 Apr 2021 15:26:36 +0000 Message-ID: References: <20210416203844.3803177-1-samitolvanen@google.com> <20210416203844.3803177-6-samitolvanen@google.com> <20210416211855.GD22348@zn.tnic> <20210416220251.GE22348@zn.tnic> <202104161519.1D37B6D26@keescook> <202104161601.CFB2CCF84F@keescook> <877dl0sc2m.ffs@nanos.tec.linutronix.de> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQW5keSBMdXRvbWlyc2tpDQo+IFNlbnQ6IDE4IEFwcmlsIDIwMjEgMDE6MTINCi4uDQo+ IFNsaWdodGx5IG1vcmUgY29tcGxpY2F0ZWQ6DQo+IA0KPiBzdHJ1Y3Qgb3BhcXVlX3N5bWJvbDsN Cj4gZXh0ZXJuIHN0cnVjdCBvcGFxdWVfc3ltYm9sIGVudHJ5X1NZU0NBTExfNjQ7DQo+IA0KPiBU aGUgb3BhcXVlX3N5bWJvbCB2YXJpYW50IGF2b2lkcyBhbnkgcG9zc2libGUgY29uZnVzaW9uIG92 ZXIgdGhlIHdlaXJkDQo+IHN0YXR1cyBvZiBhcnJheXMgaW4gQywgYW5kIGl0J3MgaGFyZCB0byBt aXN1c2UsIHNpbmNlIHN0cnVjdA0KPiBvcGFxdWVfc3ltYm9sIGlzIGFuIGluY29tcGxldGUgdHlw ZS4NCg0KTWF5YmU6DQoNCnMvb3BhcXVlX3N5bWJvbC9lbnRyeV9TWVNDQUxMXzY0Lw0KDQoJRGF2 aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50 IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTcz ODYgKFdhbGVzKQ0K