From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C598C43603 for ; Fri, 20 Dec 2019 10:10:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2642D2467F for ; Fri, 20 Dec 2019 10:10:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727285AbfLTKKQ (ORCPT ); Fri, 20 Dec 2019 05:10:16 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:58149 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726210AbfLTKKP (ORCPT ); Fri, 20 Dec 2019 05:10:15 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-133-yPtZzMMDPiugfTa6rRJszw-1; Fri, 20 Dec 2019 10:10:11 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 20 Dec 2019 10:10:10 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Fri, 20 Dec 2019 10:10:10 +0000 From: David Laight To: 'Brian Gerst' , Andy Lutomirski CC: X86 ML , LKML , Ingo Molnar , "H . Peter Anvin" , Boris Ostrovsky , Oleg Nesterov Subject: RE: [PATCH] x86: Remove force_iret() Thread-Topic: [PATCH] x86: Remove force_iret() Thread-Index: AQHVtuhWtS7aVpT6VkyrDyqz06b2R6fCyteg Date: Fri, 20 Dec 2019 10:10:10 +0000 Message-ID: <431a146f6461402da61d09fff155f35b@AcuMS.aculab.com> References: <20191219115812.102620-1-brgerst@gmail.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: 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 X-MC-Unique: yPtZzMMDPiugfTa6rRJszw-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQnJpYW4gR2Vyc3QNCj4gU2VudDogMjAgRGVjZW1iZXIgMjAxOSAwMzo0OA0KPiBPbiBU aHUsIERlYyAxOSwgMjAxOSBhdCA4OjUwIFBNIEFuZHkgTHV0b21pcnNraSA8bHV0b0BrZXJuZWwu b3JnPiB3cm90ZToNCj4gPg0KPiA+IE9uIFRodSwgRGVjIDE5LCAyMDE5IGF0IDM6NTggQU0gQnJp YW4gR2Vyc3QgPGJyZ2Vyc3RAZ21haWwuY29tPiB3cm90ZToNCj4gPiA+DQo+ID4gPiBmb3JjZV9p cmV0KCkgd2FzIG9yaWdpbmFsbHkgaW50ZW5kZWQgdG8gcHJldmVudCB0aGUgcmV0dXJuIHRvIHVz ZXIgbW9kZSB3aXRoDQo+ID4gPiB0aGUgU1lTUkVUIG9yIFNZU0VYSVQgaW5zdHJ1Y3Rpb25zLCBp biBjYXNlcyB3aGVyZSB0aGUgcmVnaXN0ZXIgc3RhdGUgY291bGQNCj4gPiA+IGhhdmUgYmVlbiBj aGFuZ2VkIHRvIGJlIGluY29tcGF0aWJsZSB3aXRoIHRob3NlIGluc3RydWN0aW9ucy4NCj4gPg0K PiA+IEl0J3MgbW9yZSB0aGFuIHRoYXQuICBCZWZvcmUgdGhlIGJpZyBzeXNjYWxsIHJld29yaywg d2UgZGlkbid0IHJlc3RvcmUNCj4gPiB0aGUgY2FsbGVyLXNhdmVkIHJlZ3MuICBTZWU6DQo+ID4N Cj4gPiBjb21taXQgMjFkMzc1YjZiMzRmZjUxMWE1MDdkZTI3YmYzMTZiM2RkZTY5MzhkOQ0KPiA+ IEF1dGhvcjogQW5keSBMdXRvbWlyc2tpIDxsdXRvQGtlcm5lbC5vcmc+DQo+ID4gRGF0ZTogICBT dW4gSmFuIDI4IDEwOjM4OjQ5IDIwMTggLTA4MDANCj4gPg0KPiA+ICAgICB4ODYvZW50cnkvNjQ6 IFJlbW92ZSB0aGUgU1lTQ0FMTDY0IGZhc3QgcGF0aA0KPiA+DQo+ID4gU28gaWYgeW91IGNoYW5n ZWQgcjEyLCBmb3IgZXhhbXBsZSwgdGhlIGNoYW5nZSB3b3VsZCBnZXQgbG9zdC4NCj4gDQo+IGZv cmNlX2lyZXQoKSBzcGVjaWZpY2FsbHkgZGVhbHQgd2l0aCBjaGFuZ2VzIHRvIENTLCBTUyBhbmQg RUZMQUdTLg0KPiBTYXZpbmcgYW5kIHJlc3RvcmluZyB0aGUgZXh0cmEgcmVnaXN0ZXJzIHdhcyBh IGRpZmZlcmVudCBwcm9ibGVtDQo+IGFsdGhvdWdoIGl0IGFmZmVjdGVkIHRoZSBzYW1lIGZ1bmN0 aW9ucyBsaWtlIHB0cmFjZSwgc2lnbmFscywgYW5kDQo+IGV4ZWMuDQoNCklzIGl0IGV2ZXIgcG9z c2libGUgZm9yIGFueSBvZiB0aGUgc2VnbWVudCByZWdpc3RlcnMgdG8gcmVmZXIgdG8gdGhlIExE VA0KYW5kIGZvciBhbm90aGVyIHRocmVhZCB0byBpbnZhbGlkYXRlIHRoZSBlbnRyaWVzICd2ZXJ5 IGxhdGUnID8NCg0KU28gZXZlbiB0aG91Z2ggdGhlIHZhbHVlcyB3ZXJlIHZhbGlkIHdoZW4gY2hh bmdlZCwgdGhleSBhcmUNCmludmFsaWQgZHVyaW5nIHRoZSAncmV0dXJuIHRvIHVzZXInIHNlcXVl bmNlLg0KDQpJIHJlbWVtYmVyIHdyaXRpbmcgYSBzaWduYWwgaGFuZGxlciB0aGF0ICdjb3JydXB0 ZWQnIGFsbCB0aGUNCnNlZ21lbnQgcmVnaXN0ZXJzIChldGMpIGFuZCBmaXhpbmcgdGhlIE5ldEJT RCBrZXJuZWwgdG8gaGFuZGxlDQphbGwgdGhlIGZhdWx0cyByZXN0b3JpbmcgdGhlIHNlZ21lbnQg cmVnaXN0ZXJzIGFuZCBJUkVUIGZhdWx0aW5nDQppbiBrZXJuZWwgKElJUkMgaW52YWxpZCB1c2Vy ICVTUyBvciAlQ1MpLg0KKElSRVQgY2FuIGFsc28gZmF1bHQgaW4gdXNlciBzcGFjZSwgYnV0IHRo YXQgaXMgYSBub3JtYWwgZmF1bHQuKQ0KDQpJcyBpdCBhY3R1YWxseSBjaGVhcGVyIHRvIHByb3Bl cmx5IHZhbGlkYXRlIHRoZSBzZWdtZW50IHJlZ2lzdGVycywNCm9yIHRha2UgdGhlICdoaXQnIG9m IHRoZSBzbGlnaHRseSBzbG93ZXIgSVJFVCBwYXRoIGFuZCBnZXQgdGhlIGNwdQ0KdG8gZG8gaXQg Zm9yIHlvdT8NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJh bWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0 cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==