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 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 EC903C433ED for ; Sat, 17 Apr 2021 13:08:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C9B2E610A6 for ; Sat, 17 Apr 2021 13:08:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236236AbhDQNJF (ORCPT ); Sat, 17 Apr 2021 09:09:05 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:36579 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236358AbhDQNJB (ORCPT ); Sat, 17 Apr 2021 09:09:01 -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-40-NxhZsd9HMzmFc3zLPSZr6w-1; Sat, 17 Apr 2021 14:08:31 +0100 X-MC-Unique: NxhZsd9HMzmFc3zLPSZr6w-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; Sat, 17 Apr 2021 14:08:30 +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; Sat, 17 Apr 2021 14:08:30 +0100 From: David Laight To: 'Grygorii Strashko' , Ilias Apalodimas , Jesper Dangaard Brouer , Christoph Hellwig CC: Matthew Wilcox , kernel test robot , Linux-MM , "kbuild-all@lists.01.org" , "clang-built-linux@googlegroups.com" , open list , "linux-fsdevel@vger.kernel.org" , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , "linuxppc-dev@lists.ozlabs.org" , Linux ARM , "David S. Miller" , Matteo Croce , "netdev@vger.kernel.org" Subject: RE: Bogus struct page layout on 32-bit Thread-Topic: Bogus struct page layout on 32-bit Thread-Index: AQHXMqLVEv6dx6LXIEqsc09GLT7Ydaq4r3RA Date: Sat, 17 Apr 2021 13:08:30 +0000 Message-ID: References: <20210409185105.188284-3-willy@infradead.org> <202104100656.N7EVvkNZ-lkp@intel.com> <20210410024313.GX2531743@casper.infradead.org> <20210410082158.79ad09a6@carbon> 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 RnJvbTogR3J5Z29yaWkgU3RyYXNoa28NCj4gU2VudDogMTYgQXByaWwgMjAyMSAxMDoyNw0KLi4u DQo+IFNyeSwgZm9yIGRlbGF5ZWQgcmVwbHkuDQo+IA0KPiBUaGUgVEkgcGxhdGZvcm1zIGFtMy80 LzUgKGNwc3cpIGFuZCBLZXlzdG9uZSAyIChuZXRjcCkgY2FuIGRvIG9ubHkgMzJiaXQgRE1BIGV2 ZW4gaW4gY2FzZSBvZiBMUEFFDQo+IChkbWEtcmFuZ2VzIGFyZSB1c2VkKS4NCj4gT3JpZ2luYWxs eSwgYXMgSSByZW1lbWJlciwgQ09ORklHX0FSQ0hfRE1BX0FERFJfVF82NEJJVCBoYXMgbm90IGJl ZW4gc2VsZWN0ZWQgZm9yIHRoZSBMUEFFIGNhc2UNCj4gb24gVEkgcGxhdGZvcm1zIGFuZCB0aGUg ZmFjdCB0aGF0IGl0IGJlY2FtZSBzZXQgaXMgdGhlIHJlc3VsdCBvZiBtdWx0aS1wYWx0Zm9ybS9h bGxYWFhjb25maWcvRE1BDQo+IG9wdGltaXphdGlvbnMgYW5kIHVuaWZpY2F0aW9uLg0KPiAoanVz dCBjaGVja2VkIC0gbm90IHNldCBpbiA0LjE0KQ0KPiANCj4gUHJvYmFibGUgY29tbWl0IDQ5NjVh Njg3ODBjNSAoImFyY2g6IGRlZmluZSB0aGUgQVJDSF9ETUFfQUREUl9UXzY0QklUIGNvbmZpZyBz eW1ib2wgaW4gbGliL0tjb25maWciKS4NCj4gDQo+IFRoZSBUSSBkcml2ZXJzIGhhdmUgYmVlbiB1 cGRhdGVkLCBmaW5hbGx5IHRvIGFjY2VwdCBBUkNIX0RNQV9BRERSX1RfNjRCSVQ9eSBieSB1c2lu ZyB0aGluZ3MgbGlrZQ0KPiAoX19mb3JjZSB1MzIpDQo+IGZvciBleGFtcGxlLg0KDQpIbW1tIHVz aW5nIChfX2ZvcmNlIHUzMikgaXMgcHJvYmFibHkgd3JvbmcuDQpJZiBhbiBhZGRyZXNzICtsZW5n dGggPj0gMioqMzIgY2FuIGdldCBwYXNzZWQgdGhlbiB0aGUgSU8gcmVxdWVzdA0KbmVlZHMgdG8g YmUgZXJyb3JlZCAob3IgYSBib3VuY2UgYnVmZmVyIHVzZWQpLg0KDQpPdGhlcndpc2UgeW91IGNh biBnZXQgcGFydGljdWxhcmx5IGhvcnJpZCBjb3JydXB0aW9ucy4NCg0KCURhdmlkDQoNCi0NClJl Z2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0 b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykN Cg== 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 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 F0956C433B4 for ; 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Sat, 17 Apr 2021 14:08:30 +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; Sat, 17 Apr 2021 14:08:30 +0100 From: David Laight To: 'Grygorii Strashko' , Ilias Apalodimas , Jesper Dangaard Brouer , Christoph Hellwig CC: Matthew Wilcox , kernel test robot , Linux-MM , "kbuild-all@lists.01.org" , "clang-built-linux@googlegroups.com" , open list , "linux-fsdevel@vger.kernel.org" , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , "linuxppc-dev@lists.ozlabs.org" , Linux ARM , "David S. Miller" , Matteo Croce , "netdev@vger.kernel.org" Subject: RE: Bogus struct page layout on 32-bit Thread-Topic: Bogus struct page layout on 32-bit Thread-Index: AQHXMqLVEv6dx6LXIEqsc09GLT7Ydaq4r3RA Date: Sat, 17 Apr 2021 13:08:30 +0000 Message-ID: References: <20210409185105.188284-3-willy@infradead.org> <202104100656.N7EVvkNZ-lkp@intel.com> <20210410024313.GX2531743@casper.infradead.org> <20210410082158.79ad09a6@carbon> 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210417_060836_451876_D8ED7FF9 X-CRM114-Status: GOOD ( 10.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Grygorii Strashko > Sent: 16 April 2021 10:27 ... > Sry, for delayed reply. > > The TI platforms am3/4/5 (cpsw) and Keystone 2 (netcp) can do only 32bit DMA even in case of LPAE > (dma-ranges are used). > Originally, as I remember, CONFIG_ARCH_DMA_ADDR_T_64BIT has not been selected for the LPAE case > on TI platforms and the fact that it became set is the result of multi-paltform/allXXXconfig/DMA > optimizations and unification. > (just checked - not set in 4.14) > > Probable commit 4965a68780c5 ("arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig"). > > The TI drivers have been updated, finally to accept ARCH_DMA_ADDR_T_64BIT=y by using things like > (__force u32) > for example. Hmmm using (__force u32) is probably wrong. If an address +length >= 2**32 can get passed then the IO request needs to be errored (or a bounce buffer used). Otherwise you can get particularly horrid corruptions. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============3884405633493238769==" MIME-Version: 1.0 From: David Laight To: kbuild-all@lists.01.org Subject: Re: Bogus struct page layout on 32-bit Date: Sat, 17 Apr 2021 13:08:30 +0000 Message-ID: In-Reply-To: List-Id: --===============3884405633493238769== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable From: Grygorii Strashko > Sent: 16 April 2021 10:27 ... > Sry, for delayed reply. > = > The TI platforms am3/4/5 (cpsw) and Keystone 2 (netcp) can do only 32bit = DMA even in case of LPAE > (dma-ranges are used). > Originally, as I remember, CONFIG_ARCH_DMA_ADDR_T_64BIT has not been sele= cted for the LPAE case > on TI platforms and the fact that it became set is the result of multi-pa= ltform/allXXXconfig/DMA > optimizations and unification. > (just checked - not set in 4.14) > = > Probable commit 4965a68780c5 ("arch: define the ARCH_DMA_ADDR_T_64BIT con= fig symbol in lib/Kconfig"). > = > The TI drivers have been updated, finally to accept ARCH_DMA_ADDR_T_64BIT= =3Dy by using things like > (__force u32) > for example. Hmmm using (__force u32) is probably wrong. If an address +length >=3D 2**32 can get passed then the IO request needs to be errored (or a bounce buffer used). Otherwise you can get particularly horrid corruptions. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1= PT, UK Registration No: 1397386 (Wales) --===============3884405633493238769==--