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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 D2891ECE58D for ; Wed, 9 Oct 2019 05:21:52 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 95F9721835 for ; Wed, 9 Oct 2019 05:21:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="R89S1QIg"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="bM0Ds8iF"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="bM0Ds8iF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 95F9721835 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=mVeDMxSuzIOcNE5qOA2/1VRMgbFFC13s+y5bjoYVSC8=; b=R89S1QIgIrY4vU 9jA2QgahkvJ0qlMc6UITCVPNjGt/1ttHBVP/gbn1IHPv6Dxr7FnPO0nSEvnKSk4SDrwMAqpLPL2m5 SMGvcqbySOkpFhs8W91xaWKQnyRgSGcYSR1HZXQl7Xxbf7Mlh3JNFnExsj7ysdnswAWXk3v6SPeW2 SalRruWUdRii8nfWcaQCoqyqoyS1bYM4jHsOy7lazFjiBL+RwvVoKpDeLm4hiBDxLNV4LGDEz70uC /zLz52LkrigidKf3BXQjr7SsbV7cy3eiRu7LIvkRyC7f/v+C1f9o7Me5iRsJYT8wkcuGrjyDypxLM ASlAyyksASOXf0I+LKqQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iI4Py-0006Qg-81; Wed, 09 Oct 2019 05:21:46 +0000 Received: from mail-eopbgr130075.outbound.protection.outlook.com ([40.107.13.75] helo=EUR01-HE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iI4Pt-0006PQ-U0 for linux-arm-kernel@lists.infradead.org; Wed, 09 Oct 2019 05:21:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Hq7LDTR4q0a5CpQhZSSxUkA+16ZVMblXsMozmdy6nnk=; b=bM0Ds8iFXU+3dB2YKOV9qv4TAtnUXYEYI7tEdu1ZXg3O7fCw4lVCHcU+SpvfbBKLNGgDgRjq0KchNUrfsmPn2Qz2rGSbtucVMqD4jPnQTngzxTVv+3tEk56j9jCkX8gn66wmDI326Xkme3FxvC/y0i0gsJJnJzWdwWFcOzGKprI= Received: from VI1PR08CA0218.eurprd08.prod.outlook.com (2603:10a6:802:15::27) by VI1PR08MB2976.eurprd08.prod.outlook.com (2603:10a6:803:44::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2347.16; Wed, 9 Oct 2019 05:21:34 +0000 Received: from VE1EUR03FT008.eop-EUR03.prod.protection.outlook.com (2a01:111:f400:7e09::201) by VI1PR08CA0218.outlook.office365.com (2603:10a6:802:15::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.2347.16 via Frontend Transport; Wed, 9 Oct 2019 05:21:34 +0000 Authentication-Results: spf=temperror (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; lists.infradead.org; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com;lists.infradead.org; dmarc=none action=none header.from=arm.com; Received-SPF: TempError (protection.outlook.com: error in processing during lookup of arm.com: DNS Timeout) Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by VE1EUR03FT008.mail.protection.outlook.com (10.152.18.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.2305.15 via Frontend Transport; Wed, 9 Oct 2019 05:21:32 +0000 Received: ("Tessian outbound 927f2cdd66cc:v33"); Wed, 09 Oct 2019 05:21:22 +0000 X-CR-MTA-TID: 64aa7808 Received: from a16d394a8436.2 (ip-172-16-0-2.eu-west-1.compute.internal [104.47.0.52]) by 64aa7808-outbound-1.mta.getcheckrecipient.com id 029B9617-B73E-42CF-89E0-13040C75A9DD.1; Wed, 09 Oct 2019 05:21:17 +0000 Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-he1eur01lp2052.outbound.protection.outlook.com [104.47.0.52]) by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id a16d394a8436.2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384); Wed, 09 Oct 2019 05:21:17 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=kJ5e1WPh/NhwgKIs77TaJKxdGIZRt2sgIBcb3nBXeq3FHqf4cV9QagAN8OR/OjstGyJYvOgWKHpiJbOqokE1MqJdYyTUrka798w5oUY9urbQX2Y8QtJPSCxMrag78rUKttSWnziL/8O0E9kHOFRMvFhcmmkX5SI+SBit0NiEUFDqa3ICTEuNXE8dFKtoUYuxwmUusvCqWx+6aikvS6vMe0TBzFvRUiBfwIaG2KCUQiqTWN/D/UVH+HKTJJmkTcWhpJ3KmYW4UPBAnsAF+JOgPOUHlvAO1kuUTHWehgweGyX/lNt1QUDag1TXGJv4cgeD7gEVUNQ77G8EgVM54tMgzw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Hq7LDTR4q0a5CpQhZSSxUkA+16ZVMblXsMozmdy6nnk=; b=V/hWFwc1GYsuEO5PrpzM38Kr5CcAF+26NJnLWMminSyTd6YeGal6VA4+n1XRo7fIdjm+Ero+qqKwGB9inaxI+R8IkzzEDIl6mdUqInQYsZcAwE//Jav2bhHQpQSS6+Asbs0zh7w2cDoWRYWSYC935bRKPkvrRyoKpCgjVNAAzMQOhiCIDn2JFuHrfkBKC0bsTEHxk0HiKV2QzNatmFhe5KiplKdSBGO+t5GGc7R2xRGG+f0ujBWhGKSeds1qSvvT8ym0AYL2tspNbVajltWfew2IDKiKMBQJ11wHPW4/BhNRuGnDz2HqhDEE0Nr2xfTqOz0GBlTyysa3gw8eFUNyNw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=arm.com; dmarc=pass action=none header.from=arm.com; dkim=pass header.d=arm.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Hq7LDTR4q0a5CpQhZSSxUkA+16ZVMblXsMozmdy6nnk=; b=bM0Ds8iFXU+3dB2YKOV9qv4TAtnUXYEYI7tEdu1ZXg3O7fCw4lVCHcU+SpvfbBKLNGgDgRjq0KchNUrfsmPn2Qz2rGSbtucVMqD4jPnQTngzxTVv+3tEk56j9jCkX8gn66wmDI326Xkme3FxvC/y0i0gsJJnJzWdwWFcOzGKprI= Received: from HE1PR0801MB1676.eurprd08.prod.outlook.com (10.168.146.150) by HE1PR0801MB2091.eurprd08.prod.outlook.com (10.168.95.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2347.16; Wed, 9 Oct 2019 05:21:14 +0000 Received: from HE1PR0801MB1676.eurprd08.prod.outlook.com ([fe80::b056:4113:e0bd:110d]) by HE1PR0801MB1676.eurprd08.prod.outlook.com ([fe80::b056:4113:e0bd:110d%6]) with mapi id 15.20.2327.026; Wed, 9 Oct 2019 05:21:14 +0000 From: "Jianyong Wu (Arm Technology China)" To: Paolo Bonzini , Marc Zyngier , "netdev@vger.kernel.org" , "yangbo.lu@nxp.com" , "john.stultz@linaro.org" , "tglx@linutronix.de" , "sean.j.christopherson@intel.com" , "richardcochran@gmail.com" , Mark Rutland , Will Deacon , Suzuki Poulose Subject: RE: [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm. Thread-Topic: [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm. Thread-Index: AQHVbfg5HjMQ+p5UhEyfzqBy9sDEZacxGVuAgAAQMICAABDUgIABdZhAgAAo7ACAAAjcAIAACYiAgB7418A= Date: Wed, 9 Oct 2019 05:21:13 +0000 Message-ID: References: <20190918080716.64242-1-jianyong.wu@arm.com> <20190918080716.64242-5-jianyong.wu@arm.com> <83ed7fac-277f-a31e-af37-8ec134f39d26@redhat.com> <629538ea-13fb-e666-8df6-8ad23f114755@redhat.com> <56a5b885-62c8-c4ef-e2f8-e945c0eb700e@redhat.com> In-Reply-To: <56a5b885-62c8-c4ef-e2f8-e945c0eb700e@redhat.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ts-tracking-id: 0332c8ce-b1c2-4bf0-a0fd-3e5ad07cc41a.1 x-checkrecipientchecked: true Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=Jianyong.Wu@arm.com; x-originating-ip: [113.29.88.7] x-ms-publictraffictype: Email X-MS-Office365-Filtering-Correlation-Id: a9bdcd4d-10bd-4603-a96d-08d74c788c62 X-MS-Office365-Filtering-HT: Tenant X-MS-TrafficTypeDiagnostic: HE1PR0801MB2091:|HE1PR0801MB2091:|VI1PR08MB2976: x-ms-exchange-transport-forked: True X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true x-ms-oob-tlc-oobclassifiers: OLM:6430;OLM:6430; x-forefront-prvs: 018577E36E X-Forefront-Antispam-Report-Untrusted: SFV:NSPM; SFS:(10009020)(4636009)(39860400002)(396003)(136003)(366004)(376002)(346002)(199004)(189003)(13464003)(102836004)(86362001)(66476007)(99286004)(64756008)(66446008)(66556008)(6246003)(71190400001)(71200400001)(76176011)(6506007)(7696005)(55236004)(33656002)(66946007)(229853002)(305945005)(54906003)(110136005)(5660300002)(74316002)(316002)(53546011)(7736002)(2906002)(2201001)(52536014)(66066001)(4326008)(478600001)(25786009)(7416002)(6116002)(3846002)(14454004)(6636002)(9686003)(6436002)(55016002)(256004)(14444005)(2501003)(8936002)(81156014)(81166006)(186003)(26005)(486006)(11346002)(8676002)(446003)(476003)(76116006)(921003)(1121003); DIR:OUT; SFP:1101; SCL:1; SRVR:HE1PR0801MB2091; H:HE1PR0801MB1676.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-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: sbakS9+zkJJj313GZmp0zA1UXPN+KS03akwHlvplmNYnSFdtjqojqQy/oCkmLkz1MUhxIrwQEEXdTPbtwo3TWPQP1UbYoXgGdyxZC9S7rO7d+f4d3/I0kSxyjUHgbFItGI/8O8I2/FOJjLcBjiaKmrx6ZxZEiX39amsLXLwj0jaKXKJKk9w5cIBGne1ny5goMyifBsnzs6MEzH94ehUoUpbnaz87tBA7XxjcVoZQP1GQHSfFNtJXfw1coZ7ir7VOMzULyIdr1QaimIHYURHd9Y+eXZMOiv7SLWlBCwVsFmYkNKwTEM0mP3ikllL5YgWIxYCdS77cOO1e8UYTJX4uf7R43q3Z8ogkevJTesuOnoaSGoNOD/q9OQdLmTOFMfXey83aDjDnEtrGARabzqGVaQbgD+HwYsqhH9TwLaA89/c= MIME-Version: 1.0 X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0801MB2091 Original-Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Jianyong.Wu@arm.com; X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: VE1EUR03FT008.eop-EUR03.prod.protection.outlook.com X-Forefront-Antispam-Report: CIP:63.35.35.123; IPV:CAL; SCL:-1; CTRY:IE; EFV:NLI; SFV:NSPM; SFS:(10009020)(4636009)(39860400002)(136003)(376002)(396003)(346002)(13464003)(199004)(189003)(22756006)(70586007)(70206006)(2501003)(336012)(478600001)(76130400001)(66066001)(2906002)(2201001)(33656002)(26826003)(126002)(47776003)(9686003)(486006)(86362001)(55016002)(476003)(229853002)(74316002)(6636002)(446003)(11346002)(436003)(6116002)(76176011)(3846002)(52536014)(14444005)(25786009)(26005)(6506007)(7736002)(186003)(316002)(63350400001)(305945005)(99286004)(81166006)(14454004)(81156014)(7696005)(4326008)(110136005)(54906003)(23676004)(50466002)(8936002)(53546011)(356004)(8676002)(2486003)(5660300002)(102836004)(36906005)(6246003)(921003)(1121003); DIR:OUT; SFP:1101; SCL:1; SRVR:VI1PR08MB2976; H:64aa7808-outbound-1.mta.getcheckrecipient.com; FPR:; SPF:TempError; LANG:en; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; A:1; MX:1; X-MS-Office365-Filtering-Correlation-Id-Prvs: 83a25e0e-af9f-4ac9-8595-08d74c788102 NoDisclaimer: True X-Forefront-PRVS: 018577E36E X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: IGI7Zz6cv/Itqu6W3FHHTIntDJYCb80U2nVXGChpNR635bUKSY1veUQaV5SzBWhz0mGVbQHZD2Kxk7NnrfrrKF1HbGtqUqxwBXgAbWvIwDpLnDCupxnCn9Ui2hYi0E9RpgEgs56V7BpvYl9VSN/5OcBz5U6mkRzUzJrfyobVNbmWhgdD5IWQMTGIAdmtFmvETmGdzDQd92KVLmFPTlxUJfHf25gVMr0yYKM1WdPhTKg1bvAwQ31d2uyMIbV+HUojPCV5bselAVMFGzlQwkUbcQi2M5nwEv0y16agajzze87V+MN2Esh+I85PzMh3UBx1mLrj/YMr1ADpkFxrAv3J6DXH5P2iGNmLk7sRbeAnWcvVSowVxCqFodP0kiV9i6Q3U//eTGu67iOmAomnKBXK8Y+vYcU4azhrDC0bVXFuYv4= X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Oct 2019 05:21:32.9916 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a9bdcd4d-10bd-4603-a96d-08d74c788c62 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB2976 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191008_222141_969925_2B6ED4BC X-CRM114-Status: GOOD ( 12.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Justin He \(Arm Technology China\)" , "kvm@vger.kernel.org" , Steve Capper , "linux-kernel@vger.kernel.org" , "Kaly Xin \(Arm Technology China\)" , nd , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Paolo, > -----Original Message----- > From: Paolo Bonzini > Sent: Thursday, September 19, 2019 8:13 PM > To: Marc Zyngier ; Jianyong Wu (Arm Technology China) > ; netdev@vger.kernel.org; yangbo.lu@nxp.com; > john.stultz@linaro.org; tglx@linutronix.de; sean.j.christopherson@intel.com; > richardcochran@gmail.com; Mark Rutland ; Will > Deacon ; Suzuki Poulose > > Cc: linux-kernel@vger.kernel.org; kvm@vger.kernel.org; Steve Capper > ; Kaly Xin (Arm Technology China) > ; Justin He (Arm Technology China) > ; nd ; linux-arm- > kernel@lists.infradead.org > Subject: Re: [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm. > > On 19/09/19 13:39, Marc Zyngier wrote: > >> I don't think it's ugly but more important, using tk->tkr_mono.clock > >> is incorrect. See how the x86 code hardcodes &kvm_clock, it's the > >> same for ARM. > > Not really. The guest kernel is free to use any clocksource it wishes. > > Understood, in fact it's the same on x86. > > However, for PTP to work, the cycles value returned by the clocksource must > match the one returned by the hypercall. So for ARM > get_device_system_crosststamp must receive the arch timer clocksource, so > that it will return -ENODEV if the active clocksource is anything else. > As ptp_kvm clock has fixed to arm arch system counter in patch set v4, we need check if the current clocksource is system counter when return clock cycle in host, so a helper needed to return the current clocksource. Could I add this helper in next patch set? Thanks Jianyong wu > Paolo > > > In some cases, it is actually desirable (like these broken systems > > that cannot use an in-kernel irqchip...). Maybe it is that on x86 the > > guest only uses the kvm_clock, but that's a much harder sell on ARM. > > The fact that ptp_kvm assumes that the clocksource is fixed doesn't > > seem correct in that case. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel