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=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED autolearn=unavailable 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 297D8C43381 for ; Wed, 13 Mar 2019 01:05:08 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4A7E42063F for ; Wed, 13 Mar 2019 01:05:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="k03hwOCz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A7E42063F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44Jtt85kGCzDqKL for ; Wed, 13 Mar 2019 12:05:04 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=arm.com (client-ip=40.107.5.72; helo=eur03-ve1-obe.outbound.protection.outlook.com; envelope-from=haibo.xu@arm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="k03hwOCz"; dkim-atps=neutral Received: from EUR03-VE1-obe.outbound.protection.outlook.com (mail-eopbgr50072.outbound.protection.outlook.com [40.107.5.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44JtrF4M0dzDqJP for ; Wed, 13 Mar 2019 12:03:25 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector1-arm-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=rHPSJU/XM4yra3LCjA7ISzyT4r4mmuSIFSb51ZqYjfw=; b=k03hwOCzCV16jrfU88sbL00LCOKNJkdZkSaNpCm9N1dnHqfmdWCbyJApf103ZS1ASPtVXGZbHs0qwZ5DpzW0+7aqZAvM+zWCWwPFD6kFINFu8YbR+HowYk29hLHoEaPv/58veWGpPhbFFrHNzpoozQIlY21YMFGyp1AuomLZP0E= Received: from AM4PR08MB2929.eurprd08.prod.outlook.com (10.171.190.138) by AM4PR08MB0786.eurprd08.prod.outlook.com (10.164.82.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1686.18; Wed, 13 Mar 2019 01:03:18 +0000 Received: from AM4PR08MB2929.eurprd08.prod.outlook.com ([fe80::e522:c03f:3d0c:f4ce]) by AM4PR08MB2929.eurprd08.prod.outlook.com ([fe80::e522:c03f:3d0c:f4ce%4]) with mapi id 15.20.1686.021; Wed, 13 Mar 2019 01:03:18 +0000 From: "Haibo Xu (Arm Technology China)" To: Sudeep Holla , Andy Lutomirski Subject: Re: [PATCH 3/6] x86: clean up _TIF_SYSCALL_EMU handling using ptrace_syscall_enter hook Thread-Topic: [PATCH 3/6] x86: clean up _TIF_SYSCALL_EMU handling using ptrace_syscall_enter hook Thread-Index: AQHUz5P9ZKULSdDQbEW1h9vbYNE6xaX7KHCAgAAd14CAAQzrgIAKf6aAgAD7mAD//5MRgIAAmEsAgADYE4A= Date: Wed, 13 Mar 2019 01:03:18 +0000 Message-ID: <5750cfac-14a7-8eed-09f4-0d53419bea6b@arm.com> References: <20190228183220.15626-1-sudeep.holla@arm.com> <20190228183220.15626-4-sudeep.holla@arm.com> <20190304101205.GA1504@e107155-lin> <96d59a68-e5e2-86d9-c707-a79aad438b76@arm.com> <20190311183403.GA31062@e107155-lin> <65b00ea1-f784-4fb4-2a98-49fa44d9fa8f@arm.com> <20190312120944.GB13825@e107155-lin> In-Reply-To: <20190312120944.GB13825@e107155-lin> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HK0PR03CA0037.apcprd03.prod.outlook.com (2603:1096:203:2f::25) To AM4PR08MB2929.eurprd08.prod.outlook.com (2603:10a6:205:c::10) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Haibo.Xu@arm.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [113.29.88.7] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: c83c4c13-ba38-4f2a-42b0-08d6a74fadc0 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(7168020)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(4618075)(2017052603328)(7153060)(7193020); SRVR:AM4PR08MB0786; x-ms-traffictypediagnostic: AM4PR08MB0786: x-microsoft-exchange-diagnostics: 1; AM4PR08MB0786; 20:BdnkpVSfCDkpLkBV+T6J2k0rcndxex7JXa+uwH45ZBNk380ZfiQH1rO9TtxRN8v/ezTB0cjUVdR0/3MAUA/69+PwYs+MShEEu/Mh16pTmu4V+rGxDhlAN5Q2q5siQM08K18CJ05RagcF42XAeXky9j6axLrlraXVVWIS6e0Uhlk= x-microsoft-antispam-prvs: x-forefront-prvs: 09752BC779 x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(346002)(366004)(396003)(39860400002)(136003)(376002)(40434004)(199004)(189003)(31696002)(36756003)(72206003)(478600001)(52116002)(3846002)(6116002)(256004)(14454004)(7416002)(86362001)(2616005)(55236004)(68736007)(11346002)(8936002)(106356001)(53936002)(93886005)(6512007)(81166006)(105586002)(446003)(2906002)(8676002)(110136005)(6436002)(6486002)(486006)(5660300002)(102836004)(31686004)(66066001)(14444005)(54906003)(229853002)(5024004)(25786009)(26005)(53546011)(6506007)(386003)(186003)(305945005)(7736002)(76176011)(97736004)(99286004)(316002)(476003)(6246003)(71190400001)(71200400001)(4326008)(81156014); DIR:OUT; SFP:1101; SCL:1; SRVR:AM4PR08MB0786; H:AM4PR08MB2929.eurprd08.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: k7CsVhxf5HY7vdzqIrg41lC1rUfVJhf92HGfQKD5HcKnTy2yc4SQlqetE+3D7DweBede0vFABBUSFDbL8/+jzZVz4d3GUW1A6Cbm1xgEVMPpkh4DsGh51HLFVGzmG2os46WzYWEk2R5epzGbpH5yLtIVJQ7t5w6jQMb6+hKnQGAwleZgDccFuZI6pHxv7OK7Bdlnda5PdHrxfp4wivQlnRT92ezcXhmjkmBXhy9U7DOwPuqkbtNw/EPKwXXRJodETQgKL41/0BE3yQXWIJOqwhq9cSq9rnnqyuclYMm7kY3Hh71bP36JEX7LCxeniTvdbLTkioFgVbooYqy5RH3pQD1f6WbfO4AtpFMf5tuJj2oT7vqD43lhEV7jXJtQmI9URG43k2GqrUeSGHnsGdB8K/8M0kKFg1+NlqtaoTF62lo= Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-Network-Message-Id: c83c4c13-ba38-4f2a-42b0-08d6a74fadc0 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Mar 2019 01:03:18.1409 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR08MB0786 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Steve Capper , Catalin Marinas , "jdike@addtoit.com" , "x86@kernel.org" , Will Deacon , "linux-kernel@vger.kernel.org" , Oleg Nesterov , Richard Weinberger , Ingo Molnar , Paul Mackerras , Borislav Petkov , Thomas Gleixner , "Bin Lu \(Arm Technology China\)" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" T24gMjAxOS8zLzEyIDIwOjA5LCBTdWRlZXAgSG9sbGEgd3JvdGU6DQo+IE9uIE1vbiwgTWFyIDEx LCAyMDE5IGF0IDA4OjA0OjM5UE0gLTA3MDAsIEFuZHkgTHV0b21pcnNraSB3cm90ZToNCj4+IE9u IE1vbiwgTWFyIDExLCAyMDE5IGF0IDY6MzUgUE0gSGFpYm8gWHUgKEFybSBUZWNobm9sb2d5IENo aW5hKQ0KPj4gPEhhaWJvLlh1QGFybS5jb20+IHdyb3RlOg0KPj4+DQo+DQo+IFsuLi5dDQo+DQo+ Pj4gRm9yIHRoZSBQVFJBQ0VfU1lTRU1VX1NJTkdMRVNURVAgcmVxdWVzdCwgcHRyYWNlIG9ubHkg bmVlZCB0byByZXBvcnQoc2VuZA0KPj4+IFNJR1RSQVApIGF0IHRoZSBlbnRyeSBvZiBhIHN5c3Rl bSBjYWxsLCBubyBuZWVkIHRvIHJlcG9ydCBhdCB0aGUgZXhpdCBvZiBhDQo+Pj4gc3lzdGVtIGNh bGwuVGhhdCdzIHdoeSB0aGUgb2xkIGxvZ2ljLXtzdGVwID0gKChmbGFncyAmIChfVElGX1NJTkdM RVNURVAgfA0KPj4+IF9USUZfU1lTQ0FMTF9FTVUpKSA9PSBfVElGX1NJTkdMRVNURVApfSBoZXJl IHRyeSB0byBmaWx0ZXIgb3V0IHRoZSBzcGVjaWFsDQo+Pj4gY2FzZShQVFJBQ0VfU1lTRU1VX1NJ TkdMRVNURVApLg0KPj4+DQo+Pj4gQW5vdGhlciB3YXkgdG8gbWFrZSBzdXJlIHRoZSBsb2dpYyBp cyBmaW5lLCB5b3UgY2FuIHJ1biBzb21lIHRlc3RzIHdpdGgNCj4+PiByZXNwZWN0IHRvIGJvdGgg bG9naWMsIGFuZCB0byBjaGVjayB3aGV0aGVyIHRoZXkgaGF2ZSB0aGUgc2FtZSBiZWhhdmlvci4N Cj4+DQo+PiB0b29scy90ZXN0aW5nL3NlbGZ0ZXN0cy94ODYvcHRyYWNlX3N5c2NhbGwuYyBoYXMg YSB0ZXN0IGludGVuZGVkIHRvDQo+PiBleGVyY2lzZSB0aGlzLiAgQ2FuIG9uZSBvZiB5b3UgZWl0 aGVyIGNvbmZpcm0gdGhhdCBpdCBkb2VzIGV4ZXJjaXNlIGl0DQo+PiBhbmQgdGhhdCBpdCBzdGls bCBwYXNzZXMgb3IgY2FuIHlvdSBpbXByb3ZlIHRoZSB0ZXN0Pw0KPj4NCj4gSSBkaWQgcnVuIHRo ZSB0ZXN0cyB3aGljaCBkaWRuJ3QgZmxhZyBhbnl0aGluZy4gSSBoYXZlbid0IGxvb2tlZCBhdCB0 aGUNCj4gZGV0YWlscyBvZiB0ZXN0IGltcGxlbWVudGF0aW9uLCBidXQgc2VlbSB0byBtaXNzIHRo aXMgY2FzZS4gSSB3aWxsIHNlZQ0KPiB3aGF0IGNhbiBiZSBpbXByb3ZlZChpZiBpdCdzIHBvc3Np YmxlKS4gQWxzbyBJIHRoaW5rIHNpbmdsZV9zdGVwX3N5c2NhbGwNCj4gaXMgdGhlIG9uZSBJIG5l ZWQgdG8gbG9vayBmb3IgdGhpcyBwYXJ0aWN1bGFyIG9uZS4gQm90aCBzaW5nbGVfc3RlcF9zeXNj YWxsDQo+IHB0cmFjZV9zeXNjYWxsIHJlcG9ydGVkIG5vIGVycm9ycy4NCj4NCj4gLS0NCj4gUmVn YXJkcywNCj4gU3VkZWVwDQo+DQoNClNpbmNlIHB0cmFjZSgpIHN5c3RlbSBjYWxsIGRvIGhhdmUg c28gbWFueSByZXF1ZXN0IHR5cGUsIEknbSBub3Qgc3VyZSB3aGV0aGVyIHRoZQ0KdGVzdCBjYXNl cyBoYXZlIGNvdmVyZWQgYWxsIG9mIHRoYXQuIEJ1dCBoZXJlIHdlJ2QgYmV0dGVyIG1ha2Ugc3Vy ZSB0aGUgUFRSQUNFX1NZU0VNVQ0KYW5kIFBUUkFDRV9TWVNFTVVfU0lOR0xFU1RFUCByZXF1ZXN0 cyBhcmUgd29yayBjb3JyZWN0bHkuIE1heSBiZSB5b3UgY2FuIHZlcmlmeSB0aGVtIHdpdGgNCnRl c3RzIGZyb20gQmluIEx1KGJpbi5sdUBhcm0uY29tKS4NCg0KUmVnYXJkcywNCkhhaWJvDQpJTVBP UlRBTlQgTk9USUNFOiBUaGUgY29udGVudHMgb2YgdGhpcyBlbWFpbCBhbmQgYW55IGF0dGFjaG1l bnRzIGFyZSBjb25maWRlbnRpYWwgYW5kIG1heSBhbHNvIGJlIHByaXZpbGVnZWQuIElmIHlvdSBh cmUgbm90IHRoZSBpbnRlbmRlZCByZWNpcGllbnQsIHBsZWFzZSBub3RpZnkgdGhlIHNlbmRlciBp bW1lZGlhdGVseSBhbmQgZG8gbm90IGRpc2Nsb3NlIHRoZSBjb250ZW50cyB0byBhbnkgb3RoZXIg cGVyc29uLCB1c2UgaXQgZm9yIGFueSBwdXJwb3NlLCBvciBzdG9yZSBvciBjb3B5IHRoZSBpbmZv cm1hdGlvbiBpbiBhbnkgbWVkaXVtLiBUaGFuayB5b3UuDQo=