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x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934033AbeCSPuE (ORCPT ); Mon, 19 Mar 2018 11:50:04 -0400 Received: from mail-sn1nam01on0129.outbound.protection.outlook.com ([104.47.32.129]:20557 "EHLO NAM01-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934022AbeCSPtx (ORCPT ); Mon, 19 Mar 2018 11:49:53 -0400 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Stephen Hemminger , Stephen Hemminger , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL for 4.15 098/124] uio_hv_generic: check that host supports monitor page Thread-Topic: [PATCH AUTOSEL for 4.15 098/124] uio_hv_generic: check that host supports monitor page Thread-Index: AQHTv5nFms+qtFW1mUW8+faI5OkGfQ== Date: Mon, 19 Mar 2018 15:48:49 +0000 Message-ID: <20180319154645.11350-98-alexander.levin@microsoft.com> References: <20180319154645.11350-1-alexander.levin@microsoft.com> In-Reply-To: <20180319154645.11350-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0981;7:aP+um4q1rUGyjFY7FM2DwEQ0eceqygZ7oXtfGvAhetIKdz7/vYe7JS/nle3ZlNbiYmQJCBctdz/BzvZ2tuvRVd0gYoq0AFUrkOJQUk9Pbm6mh9uM/QKiA7Cw3D0nYrL27oKP3hq6646UbEgJbXPSCzdvrnmw6LmiL3a/K9dQqmia1w3ynuUV8r2XjqQvNKHdzNPT8BuE5Zpm3azg8UzM1+VAJHfqNZd9M2WWFY6NQzLHlJOmZ6Yf1bZx6lywk7Dq;20:OlKWQjXiOu+K+IQ0jwrNaDPPNF7MmiLgQWaUQILlCpcvjidGPUUKD1sP5m1tY6n/LNXB3yOXl1xVpylp/Ds6ka0X+4LsH70JOc64Ok+JnWICgansUfKCYfijXJMy8vfoHmvligmI2M2bihw72Hns7BtQtb1/qvjhwbzmrQlXOFM= x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 8b8af29e-5196-46d6-0b05-08d58db106a1 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0981; 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x-microsoft-antispam-message-info: G8aNa8XfTvWHixQoKvx7tx4mQvBNcbLBduVyVtI6L7A8rdu2Rlj1ghCuL6/AbNefC8DsK9aTfiwroSht/a3qi6FU3b6Gvl6m/VukhkFCwbQDYxrXy2/stXjhtSZDqo9ExM4ZURBVOr1+OVr2BUdlvcDelychYmC7eOoFeTkHKOOC30rZgnAu4IoB2TaCUA9fFVItx2inYjE3MfcblhYSNxq2kn42zBdDsrbIEpb09a+PNI+e9k27A6XhyIUfsCchCE7fs9RKrvrP8lLm6Bz/D70gFuYidozJ1XsUo0nRbVMvlId0OnvE9suwR0Z2HI4Ec6HHJgu4DS0ZUjwsoRLluQ== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8b8af29e-5196-46d6-0b05-08d58db106a1 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Mar 2018 15:48:49.3312 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0981 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Stephen Hemminger [ Upstream commit 06028d15177a1b406b7b075ea47c6a352732f23a ] In order for userspace application to signal host, it needs the host to support the monitor page property. Check for the flag and fail if this is not supported. Signed-off-by: Stephen Hemminger Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/uio/uio_hv_generic.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 48d5327d38d4..fe5cdda80b2c 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -124,6 +124,13 @@ hv_uio_probe(struct hv_device *dev, if (ret) goto fail; =20 + /* Communicating with host has to be via shared memory not hypercall */ + if (!dev->channel->offermsg.monitor_allocated) { + dev_err(&dev->device, "vmbus channel requires hypercall\n"); + ret =3D -ENOTSUPP; + goto fail_close; + } + dev->channel->inbound.ring_buffer->interrupt_mask =3D 1; set_channel_read_mode(dev->channel, HV_CALL_DIRECT); =20 --=20 2.14.1