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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 0323FC433B4 for ; Thu, 13 May 2021 10:36:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEA0D6008E for ; Thu, 13 May 2021 10:36:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231570AbhEMKhw (ORCPT ); Thu, 13 May 2021 06:37:52 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:52346 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231476AbhEMKhl (ORCPT ); Thu, 13 May 2021 06:37:41 -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-224-rC7ecZ6kMiy0NzftmwzKAQ-1; Thu, 13 May 2021 11:36:29 +0100 X-MC-Unique: rC7ecZ6kMiy0NzftmwzKAQ-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; Thu, 13 May 2021 11:36:27 +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; Thu, 13 May 2021 11:36:27 +0100 From: David Laight To: 'Maximilian Luz' , Thomas Gleixner , Ingo Molnar , Borislav Petkov CC: "H. Peter Anvin" , Sachi King , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: RE: [PATCH] x86/i8259: Work around buggy legacy PIC Thread-Topic: [PATCH] x86/i8259: Work around buggy legacy PIC Thread-Index: AQHXR3+B5Hf0DG1T80+Lb/Y+9zG7TarhDftggAATCoCAABWukA== Date: Thu, 13 May 2021 10:36:27 +0000 Message-ID: References: <20210512210459.1983026-1-luzmaximilian@gmail.com> <9b70d8113c084848b8d9293c4428d71b@AcuMS.aculab.com> 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 DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogTWF4aW1pbGlhbiBMdXog PGx1em1heGltaWxpYW5AZ21haWwuY29tPg0KPiBTZW50OiAxMyBNYXkgMjAyMSAxMToxMg0KPiBU bzogRGF2aWQgTGFpZ2h0IDxEYXZpZC5MYWlnaHRAQUNVTEFCLkNPTT47IFRob21hcyBHbGVpeG5l ciA8dGdseEBsaW51dHJvbml4LmRlPjsgSW5nbyBNb2xuYXINCj4gPG1pbmdvQHJlZGhhdC5jb20+ OyBCb3Jpc2xhdiBQZXRrb3YgPGJwQGFsaWVuOC5kZT4NCj4gQ2M6IEguIFBldGVyIEFudmluIDxo cGFAenl0b3IuY29tPjsgU2FjaGkgS2luZyA8bmFrYXRvQG5ha2F0by5pbz47IHg4NkBrZXJuZWwu b3JnOyBsaW51eC0NCj4ga2VybmVsQHZnZXIua2VybmVsLm9yZzsgc3RhYmxlQHZnZXIua2VybmVs Lm9yZw0KPiBTdWJqZWN0OiBSZTogW1BBVENIXSB4ODYvaTgyNTk6IFdvcmsgYXJvdW5kIGJ1Z2d5 IGxlZ2FjeSBQSUMNCj4gDQo+IE9uIDUvMTMvMjEgMTA6MTAgQU0sIERhdmlkIExhaWdodCB3cm90 ZToNCj4gPiBGcm9tOiBNYXhpbWlsaWFuIEx1eg0KPiA+PiBTZW50OiAxMiBNYXkgMjAyMSAyMjow NQ0KPiA+Pg0KPiA+PiBUaGUgbGVnYWN5IFBJQyBvbiB0aGUgQU1EIHZhcmlhbnQgb2YgdGhlIE1p Y3Jvc29mdCBTdXJmYWNlIExhcHRvcCA0IGhhcw0KPiA+PiBzb21lIHByb2JsZW1zIG9uIGJvb3Qu IEZvciBzb21lIHJlYXNvbiBpdCBjb25zaXN0ZW50bHkgZG9lcyBub3QgcmVzcG9uZA0KPiA+PiBv biB0aGUgZmlyc3QgdHJ5LCByZXF1aXJpbmcgYSBjb3VwbGUgbW9yZSB0cmllcyBiZWZvcmUgaXQg ZmluYWxseQ0KPiA+PiByZXNwb25kcy4NCj4gPg0KPiA+IFRoYXQgc2VlbXMgdmVyeSBzdHJhbmdl LCBzb21ldGhpbmcgZWxzZSBtdXN0IGJlIGdvaW5nIG9uIHRoYXQgY2F1c2VzIHRoZSBncmllZi4N Cj4gPiBUaGUgODI1OSB3aWxsIGJlIGJ1aWx0IGludG8gdG8gdGhlIG9uZSBvZiB0aGUgY3B1IHN1 cHBvcnQgY2hpcHMuDQo+ID4gSSBjYW4ndCBpbWFnaW5lIHRoYXQgcmVxdWlyZXMgYW55dGhpbmcg c3BlY2lhbC4NCj4gDQo+IFJpZ2h0LCBpdCdzIGRlZmluaXRlbHkgc3RyYW5nZS4gQm90aCBTYWNo aSAoSSBpbWFnaW5lKSBhbmQgSSBkb24ndCBrbm93DQo+IG11Y2ggYWJvdXQgdGhlc2UgZGV2aWNl cywgc28gd2UncmUgb3BlbiBmb3Igc3VnZ2VzdGlvbnMuDQoNCkkgZm91bmQgYSBjb3B5IG9mIHRo ZSBkYXRhc2hlZXQgKEkgZG9uJ3Qgc2VlbSB0byBoYXZlIHRoZSBibGFjayBib29rKToNCg0KaHR0 cHM6Ly9wZG9zLmNzYWlsLm1pdC5lZHUvNi44MjgvMjAxMC9yZWFkaW5ncy9oYXJkd2FyZS84MjU5 QS5wZGYNCg0KVGhlIFBDIGhhcmR3YXJlIGhhcyB0d28gODI1OSBpbiBjYXNjYWRlIG1vZGUuDQoo Q2FzY2FkZWQgdXNpbmcgYW4gaW50ZXJydXB0IHRoYXQgd2Fzbid0IHJlYWxseSB1c2luZyBpbiB0 aGUgb3JpZ2luYWwNCjgwODggUEMgd2hpY2ggb25seSBoYWQgb25lIDgyNTkuKQ0KDQpJIHdvbmRl ciBpZiB0aGUgYmlvcyBoYXMgYWN0dWFsbHkgaW5pdGlhbGlzZWQgaXMgcHJvcGVybHkuDQpTb21l IGluaXRpYWxpc2F0aW9uIHdyaXRlcyBoYXZlIHRvIGJlIGRvbmUgdG8gc2V0IGV2ZXJ5dGhpbmcg dXAuDQoNCkl0IGlzIGFsc28gd29ydGggbm90aW5nIHRoYXQgdGhlIHByb2JlIGNvZGUgaXMgc3Bl Y3RhY3VsYXJseSBjcmFwLg0KSXQgd3JpdGVzIDB4ZmYgYW5kIHRoZW4gY2hlY2tzIHRoYXQgMHhm ZiBpcyByZWFkIGJhY2suDQpBbG1vc3QgYW55dGhpbmcgKGluY2x1ZGluZyBhIGZhaWxlZCBQQ0ll IHJlYWQgdG8gdGhlIElTQSBicmlkZ2UpDQp3aWxsIHJldHVybiAweGZmIGFuZCBtYWtlIHRoZSB0 ZXN0IHBhc3MuDQoNCkl0J3MgYWJvdXQgMzUgeWVhcnMgc2luY2UgSSBsYXN0IHdyb3RlIHRoZSBj b2RlIHRvIGluaXRpYWxpc2UgYW4gODI1OS4NClRoZSBtZW1vcnkgY2VsbHMgYXJlIGZvZ2d5Lg0K DQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQs IE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86 IDEzOTczODYgKFdhbGVzKQ0K