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x-originating-ip: [119.31.174.71] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: c4b930b5-707f-4b43-4f64-08d72d2e1b50 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020);SRVR:AM0PR04MB6353; x-ms-traffictypediagnostic: AM0PR04MB6353: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-forefront-prvs: 0145758B1D x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(4636009)(346002)(396003)(136003)(39860400002)(366004)(376002)(199004)(189003)(53936002)(316002)(66946007)(66476007)(11346002)(6506007)(256004)(8936002)(14444005)(81166006)(6436002)(71200400001)(71190400001)(7736002)(54906003)(66446008)(64756008)(102836004)(86362001)(186003)(26005)(3846002)(4326008)(44832011)(66556008)(76176011)(476003)(486006)(76116006)(446003)(7696005)(25786009)(15650500001)(9686003)(33656002)(5660300002)(66066001)(99286004)(229853002)(305945005)(6916009)(74316002)(6116002)(8676002)(81156014)(6246003)(14454004)(2906002)(52536014)(478600001)(55016002);DIR:OUT;SFP:1101;SCL:1;SRVR:AM0PR04MB6353;H:AM0PR04MB4481.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: N1i0ZlfjDSIb0aw00LHaO7LBSNAtw9P7QV/nj5m8coiHAI2KxZpBQsLZm53SJlX8+tlJ2QE/dUUAWqC0qESKFFEScHaDTN0VVdo67sSESr9wL+dLlBP/lRdY7pj5CZeaHR9Ibc36ljnTZhWmV4sahoFhIGPd+6xx8GKpiv8hzq4Ktbw7tCbtoksOfAANMfr748S8Kk0L+3w0lMkIhzQO4+J4wJXa4Sg59VYou45psr+tkl3EMbAQoylibOuDh+0A72P8drnZog6a6QjaLo4TFxg+s802wODhQ/Oi69itqsG1Um2pkOG3ja6SrJS9x0BBvip9Vv6VqQwPUi31YFaYmnluSmIKcwI+8Jo8rOfeL5m3epFFegDZ+a28XjKkt6qV+FWdnDKlwHUUAsVolB+Ihy5zvYnzDkoJGrpMSW/r4qA= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: c4b930b5-707f-4b43-4f64-08d72d2e1b50 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Aug 2019 09:40:34.4539 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: jTSvnSvGdZu1f97KT8SGP8xnAwD69i05H0YOWYWGa/g0BtTyYHtT2LqJ8R9+u3MSwqEnkkKx6FLTdXDpChzc6A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB6353 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Sudeep > Subject: Re: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the= ARM > SMC/HVC mailbox >=20 > On Fri, Aug 30, 2019 at 07:37:41AM +0000, Peng Fan wrote: > > Hi Jassi, > > > > I think there could be channel for TEE, and channel for Linux. > > > > For virtualization case, there could be dedicated channel for each = VM. > > > > > > > I am talking from Linux pov. Functions 0xfe and 0xff above, can't > > > both be active at the same time, right? > > > > If I get your point correctly, > > On UP, both could not be active. On SMP, tx/rx could be both active, > > anyway this depends on secure firmware and Linux firmware design. > > >=20 > Just to confirm, we can't have SMC/HVC based Rx channel as there's no > *architectural* way to achieve it. So it can be based on some interrupt f= rom > secure side and hence will be a *different* type of channel/controller. >=20 > Sorry to make this point repeatedly, but juts to be absolutely clear: > as it stands, SMC/HVC can be used only for Tx today. Since interrupt notification was dropped in v5, I need to drop RX descripti= on in v6. Thanks, Peng. >=20 > -- > Regards, > Sudeep From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peng Fan Subject: RE: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the ARM SMC/HVC mailbox Date: Fri, 30 Aug 2019 09:40:34 +0000 Message-ID: References: <1567004515-3567-1-git-send-email-peng.fan@nxp.com> <1567004515-3567-2-git-send-email-peng.fan@nxp.com> <20190830093005.GA31297@bogus> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20190830093005.GA31297@bogus> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Sudeep Holla Cc: Jassi Brar , "robh+dt@kernel.org" , "mark.rutland@arm.com" , "andre.przywara@arm.com" , "f.fainelli@gmail.com" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , dl-linux-imx List-Id: devicetree@vger.kernel.org Hi Sudeep > Subject: Re: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the= ARM > SMC/HVC mailbox >=20 > On Fri, Aug 30, 2019 at 07:37:41AM +0000, Peng Fan wrote: > > Hi Jassi, > > > > I think there could be channel for TEE, and channel for Linux. > > > > For virtualization case, there could be dedicated channel for each = VM. > > > > > > > I am talking from Linux pov. Functions 0xfe and 0xff above, can't > > > both be active at the same time, right? > > > > If I get your point correctly, > > On UP, both could not be active. On SMP, tx/rx could be both active, > > anyway this depends on secure firmware and Linux firmware design. > > >=20 > Just to confirm, we can't have SMC/HVC based Rx channel as there's no > *architectural* way to achieve it. So it can be based on some interrupt f= rom > secure side and hence will be a *different* type of channel/controller. >=20 > Sorry to make this point repeatedly, but juts to be absolutely clear: > as it stands, SMC/HVC can be used only for Tx today. Since interrupt notification was dropped in v5, I need to drop RX descripti= on in v6. Thanks, Peng. >=20 > -- > Regards, > Sudeep 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 B67DFC3A5A4 for ; Fri, 30 Aug 2019 09:41:10 +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 7866821670 for ; Fri, 30 Aug 2019 09:41:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GeoDJi/b"; 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Fri, 30 Aug 2019 09:40:34 +0000 Received: from AM0PR04MB4481.eurprd04.prod.outlook.com ([fe80::5d98:e1f4:aa72:16b4]) by AM0PR04MB4481.eurprd04.prod.outlook.com ([fe80::5d98:e1f4:aa72:16b4%4]) with mapi id 15.20.2178.023; Fri, 30 Aug 2019 09:40:34 +0000 From: Peng Fan To: Sudeep Holla Subject: RE: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the ARM SMC/HVC mailbox Thread-Topic: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the ARM SMC/HVC mailbox Thread-Index: AQHVXU0YJPArUxY1ok6XlIUgkri4VacTNWSAgAAFe+CAABGfAIAAAKjwgAAjQoCAAAKuIA== Date: Fri, 30 Aug 2019 09:40:34 +0000 Message-ID: References: <1567004515-3567-1-git-send-email-peng.fan@nxp.com> <1567004515-3567-2-git-send-email-peng.fan@nxp.com> <20190830093005.GA31297@bogus> In-Reply-To: <20190830093005.GA31297@bogus> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=peng.fan@nxp.com; x-originating-ip: [119.31.174.71] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: c4b930b5-707f-4b43-4f64-08d72d2e1b50 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; 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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 Sudeep > Subject: Re: [PATCH v5 1/2] dt-bindings: mailbox: add binding doc for the ARM > SMC/HVC mailbox > > On Fri, Aug 30, 2019 at 07:37:41AM +0000, Peng Fan wrote: > > Hi Jassi, > > > > I think there could be channel for TEE, and channel for Linux. > > > > For virtualization case, there could be dedicated channel for each VM. > > > > > > > I am talking from Linux pov. Functions 0xfe and 0xff above, can't > > > both be active at the same time, right? > > > > If I get your point correctly, > > On UP, both could not be active. On SMP, tx/rx could be both active, > > anyway this depends on secure firmware and Linux firmware design. > > > > Just to confirm, we can't have SMC/HVC based Rx channel as there's no > *architectural* way to achieve it. So it can be based on some interrupt from > secure side and hence will be a *different* type of channel/controller. > > Sorry to make this point repeatedly, but juts to be absolutely clear: > as it stands, SMC/HVC can be used only for Tx today. Since interrupt notification was dropped in v5, I need to drop RX description in v6. Thanks, Peng. > > -- > Regards, > Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel