Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 98BD8C433F5 for ; Wed, 12 Jan 2022 15:15:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354480AbiALPPb (ORCPT ); Wed, 12 Jan 2022 10:15:31 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:21368 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354458AbiALPPa (ORCPT ); Wed, 12 Jan 2022 10:15:30 -0500 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-89-tNDfIHeVOGSXjjHD7BfLmw-1; Wed, 12 Jan 2022 15:15:28 +0000 X-MC-Unique: tNDfIHeVOGSXjjHD7BfLmw-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 15.0.1497.26; Wed, 12 Jan 2022 15:15:27 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.026; Wed, 12 Jan 2022 15:15:27 +0000 From: David Laight To: 'Mathieu Desnoyers' CC: Christian Brauner , Christian Brauner , Peter Zijlstra , linux-kernel , Thomas Gleixner , paulmck , Boqun Feng , "H. Peter Anvin" , Paul Turner , linux-api , Florian Weimer , carlos Subject: RE: [RFC PATCH v2 1/2] rseq: x86: implement abort-at-ip extension Thread-Topic: [RFC PATCH v2 1/2] rseq: x86: implement abort-at-ip extension Thread-Index: AdgHxNJPmHALYHCBSGGqQq0pyoAGXDSYsRN7NJggl0A= Date: Wed, 12 Jan 2022 15:15:27 +0000 Message-ID: <0088806280f54211b3f90b2c1a82a140@AcuMS.aculab.com> References: <20220110171611.8351-1-mathieu.desnoyers@efficios.com> <20220111110556.inteixgtl5vpmka7@wittgenstein> <1626924888.21447.1641922985771.JavaMail.zimbra@efficios.com> <20220112084617.32bjjo774n7vvyct@wittgenstein> <1475639366.24565.1641998849957.JavaMail.zimbra@efficios.com> <71e7d09733df4a899d12b7ef25198bbc@AcuMS.aculab.com> <1953851780.24610.1641999934047.JavaMail.zimbra@efficios.com> In-Reply-To: <1953851780.24610.1641999934047.JavaMail.zimbra@efficios.com> 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 RnJvbTogTWF0aGlldSBEZXNub3llcnMNCj4gU2VudDogMTIgSmFudWFyeSAyMDIyIDE1OjA2DQo+ IA0KPiAtLS0tLSBPbiBKYW4gMTIsIDIwMjIsIGF0IDk6NTggQU0sIERhdmlkIExhaWdodCBEYXZp ZC5MYWlnaHRAQUNVTEFCLkNPTSB3cm90ZToNCj4gDQo+ID4+ICAqIFsqXSBUaGUgb3BlbnJpc2Ms IHBvd2VycGM2NCBhbmQgeDg2LTY0IGFyY2hpdGVjdHVyZXMgZGVmaW5lIGEgInJlZHpvbmUiIGFz IGENCj4gPj4gICogICAgIHN0YWNrIGFyZWEgYmV5b25kIHRoZSBzdGFjayBwb2ludGVyIHdoaWNo IGNhbiBiZSB1c2VkIGJ5IHRoZSBjb21waWxlcg0KPiA+PiAgKiAgICAgdG8gc3RvcmUgbG9jYWwg dmFyaWFibGVzIGluIGxlYWYgZnVuY3Rpb25zLg0KPiA+DQo+ID4gSSB3b25kZXIgaWYgdGhhdCBp cyByZWFsbHkgd29ydGggdGhlIHRyb3VibGUgaXQgY2F1c2VzIQ0KPiA+IEJ5IHRoZSB0aW1lIGEg ZnVuY3Rpb24gaXMgc3BpbGxpbmcgdmFsdWVzIHRvIHN0YWNrIHRoZSBjb3N0DQo+ID4gb2YgYSAl c3AgdXBkYXRlIGlzIGFsbW9zdCBjZXJ0YWlubHkgbm9pc2UuDQo+ID4NCj4gPiBTb21lb25lIGNs ZWFybHkgdGhvdWdodCBpdCB3YXMgYSAnZ29vZCBpZGVhICh0bSknLg0KPiANCj4gSSBtdXN0IGFk bWl0IHRoYXQgSSd2ZSBiZWVuIHN1cnByaXNlZCB0byBsZWFybiBhYm91dCB0aGVzZSByZWR6b25l cy4gVGhhbmtzIGZvcg0KPiBwb2ludGluZyB0aGVtIG91dCB0byBtZSwgaXQgd2FzIGNsZWFybHkg YSBibGluZCBzcG90LiBJIHN1c3BlY3QgaXQgd291bGQgYmUgdXNlZnVsDQo+IHRvIGludHJvZHVj ZSBwZXItYXJjaGl0ZWN0dXJlIEtFUk5FTF9SRURaT05FLCBVU0VSX1JFRFpPTkUgYW5kIENPTVBB VF9VU0VSX1JFRFpPTkUNCj4gd2l0aCBhIGFzbS1nZW5lcmljIHZlcnNpb24gZGVmaW5pbmcgdGhl bSB0byAwLCB3aXRoIHByb3BlciBkb2N1bWVudGF0aW9uLiBJdCB3b3VsZA0KPiBtYWtlIGl0IGNs ZWFyZXIgdG8ga2VybmVsIGRldmVsb3BlcnMgd29ya2luZyBvbiBzdHVmZiBzaW1pbGFyIHRvIHNp Z25hbCBoYW5kbGVyDQo+IGRlbGl2ZXJ5IHRoYXQgdGhleSBuZWVkIHRvIGNvbnNpZGVyIHRoZXNl IGNhcmVmdWxseS4NCg0KVGhleSBjYW4gbmV2ZXIgYmUgdXNlZCBpbiBrZXJuZWwgLSBhbnkgSVNS IHdvdWxkIG92ZXJ3cml0ZSB0aGVtLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNz IExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAx UFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K