Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp4643619pxj; Tue, 8 Jun 2021 20:57:00 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwTx1MrEGMRz0b0zTSpMHVv4cgPucFIxTjdwAtJQQEllkM1byBGWAU8FvOQ3RxrRG45MjQR X-Received: by 2002:a17:907:7b91:: with SMTP id ne17mr21393468ejc.58.1623211020463; Tue, 08 Jun 2021 20:57:00 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1623211020; cv=none; d=google.com; s=arc-20160816; b=yM10D3m5SOuicRvIUTJIZ3LiwVRF2N4g7fKyxbag3qWfwcWCMKhffC6CweRlKNgwy+ SvGj/DQ0qUIwdyzYOz3NuzbdHS0VMN99mV0Mf/Cs+/C1NMwMqW/OkXnIWHFhVgGiplcv KQDcmVNODmuZ6W7luEqXf3Gk2keO9IPlBZat/RXWnFvjlpN2TNhEC32JpGqKJ4sDQks0 gpnO5wYIQne63Ksz0XRZlM3+jADU58AayHg64Tk3/6BCP9fphQl9iTfxvQGSBqkf/E4f VoXAEz4Y2ryQeuU0ci9jIQl5WxmeLZ5HZVX2uJtgx9UVOsZmLZp/yOPFunmzVmhqM5Bp ejtA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :mime-version:accept-language:in-reply-to:references:message-id:date :thread-index:thread-topic:subject:cc:to:from; bh=aCApVIH6akl6NnI3yP4LOr8bdci2E6JiW3/d0JFbYkg=; b=Uio0Jq4e2uYRdYsUcIWZmYl7pS/z/EYXrmiSWl+D/PYwudiiKZpGEG1kYuHMjXqzSF GwhSHtgoPXn9LDClvJwcODmtA4JbiNvWBT/iWkA11DOE48hR9GFDRPp7oBrVg2rhxJvH uBDrXbm5Oj/sjL1dB9gw2P7TujGdr01y2IeHpoDZrs4lJdGVq8Z8IONDO45kVLEW8uhR uYS0GutHvdTcYN+55NtFhArn5S3i+4xZnNt4iQ+sn0DxAdgqpczsEK15soJINHtpJLse bKA2iPG12NruCOURRvW12vQt14n5KtfOd9yTG1IFBr63gPH4HvZI8b9xu2nzlNKG7+CQ DPwA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id 18si1418326ejj.476.2021.06.08.20.56.36; Tue, 08 Jun 2021 20:57:00 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233720AbhFHPCQ (ORCPT + 99 others); Tue, 8 Jun 2021 11:02:16 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:49688 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233716AbhFHPCP (ORCPT ); Tue, 8 Jun 2021 11:02:15 -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-162-9RBwFXs0Nk6I40uBzgaFIw-1; Tue, 08 Jun 2021 16:00:19 +0100 X-MC-Unique: 9RBwFXs0Nk6I40uBzgaFIw-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 15.0.1497.18; Tue, 8 Jun 2021 16:00:17 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.018; Tue, 8 Jun 2021 16:00:17 +0100 From: David Laight To: 'Christoph Hellwig' , Guo Ren CC: Nick Kossifidis , Drew Fustini , Anup Patel , Palmer Dabbelt , "wefu@redhat.com" , =?utf-8?B?V2VpIFd1ICjlkLTkvJ8p?= , linux-riscv , "Linux Kernel Mailing List" , linux-arch , "linux-sunxi@lists.linux.dev" , Guo Ren , "Paul Walmsley" , Benjamin Koch , Matteo Croce , Wei Fu Subject: RE: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support Thread-Topic: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support Thread-Index: AQHXW2Yf+E+HbgFRkkm3Xv2DTkp7y6sKNaKQ Date: Tue, 8 Jun 2021 15:00:17 +0000 Message-ID: <2db975b5f24149b19191120b9f0f506b@AcuMS.aculab.com> References: <1621400656-25678-1-git-send-email-guoren@kernel.org> <20210519052048.GA24853@lst.de> <20210519064435.GA3076809@x1> <20210519065352.GA31590@lst.de> <29733b0931d9dd6a2f0b6919067c7efe@mailhost.ics.forth.gr> <20210607062701.GB24060@lst.de> In-Reply-To: <20210607062701.GB24060@lst.de> 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 RnJvbTogQ2hyaXN0b3BoIEhlbGx3aWcNCj4gU2VudDogMDcgSnVuZSAyMDIxIDA3OjI3DQo+IA0K PiBPbiBNb24sIEp1biAwNywgMjAyMSBhdCAxMToxOTowM0FNICswODAwLCBHdW8gUmVuIHdyb3Rl Og0KPiA+ID5Gcm9tIExpbnV4IG5vbi1jb2hlcmVuY3kgdmlldywgd2UgbmVlZDoNCj4gPiAgLSBO b24tY2FjaGUgKyBTdHJvbmcgT3JkZXIgUFRFIGF0dHJpYnV0ZXMgdG8gZGVhbCB3aXRoIGRyaXZl cnMnIERNQSBkZXNjcmlwdG9ycw0KPiA+ICAtIE5vbi1jYWNoZSArIHdlYWsgb3JkZXIgdG8gZGVh bCB3aXRoIGZyYW1lYnVmZmVyIGRyaXZlcnMNCj4gPiAgLSBDTU8gZG1hX3N5bmMgdG8gc3luYyBj YWNoZSB3aXRoIERNQSBkZXZpY2VzDQo+IA0KPiBUaGlzIGlzIG5vdCBzdHJpY3RseSB0cnVlLiAg QXQgdGhlIHZlcnkgbWluaW11bSB5b3Ugb25seSBuZWVkIGNhY2hlDQo+IGludmFsaWRhdGlvbiBh bmQgd3JpdGViYWNrIGluc3RydWN0aW9ucy4gIEZvciBleGFtcGxlIGVhcmx5IHBhcmlzYw0KPiBD UFVzIGFuZCBzb21lIG02OGtub21tdSBTT0NzIGhhdmUgbm8gc3VwcG9ydCBmb3IgdW5jYWNoZWQg YXJlYXMgYXQgYWxsLA0KPiBhbmQgTGludXggd29ya3MuICBCdXQgdG8gYmUgZmFpciB0aGlzIGlz IHZlcnkgcGFpbmZ1bCBhbmQgc3VwcG9ydHMgb25seQ0KPiB2ZXJ5IGxpbWl0ZWQgcGVyaXBoYWxz LiAgU28gZm9yIG1vZGVybiBmdWxsIExpbnV4IHN1cHBvcnQgc29tZSB1bmNhaGVkDQo+IG1lbW9y eSBpcyBhZHZpc2FibGUuICBCdXQgdGhhdCBkb2Vzbid0IGhhdmUgdG8gYmUgdXNpbmcgUFRFIGF0 dHJpYnV0ZXMuDQo+IEl0IGNvdWxkIGFsc28gYmUgcGh5c2ljYWwgbWVtb3J5IHJlZ2lvbnMgdGhh dCBhcmUgZWl0aGVyIHRvdGFsbHkgZml4ZWQNCj4gb3Igc29tZXdoYXQgZHluYW1pYy4NCg0KSXQg aXMgYWxtb3N0IGltcG9zc2libGUgdG8gaW50ZXJmYWNlIHRvIG1hbnkgZXRoZXJuZXQgY2hpcHMg d2l0aG91dA0KZWl0aGVyIGNvaGVyZW50IG9yIHVuY2FjaGVkIG1lbW9yeSBmb3IgdGhlIGRlc2Ny aXB0b3IgcmluZ3MuDQpUaGUgc3RhdHVzIGJpdHMgb24gdGhlIHRyYW5zbWl0IHJpbmcgYXJlIHBh cnRpY3VsYXJseSBwcm9ibGVtYXRpYy4NCg0KVGhlIHJlY2VpdmUgcmluZyBjYW4gYmUgZG9uZSB3 aXRoIHdyaXRlYmFjaytpbnZhbGlkYXRlIHByb3ZpZGVkIHlvdQ0KZmlsbCBhIGNhY2hlIGxpbmUg YXQgYSB0aW1lLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBC cmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdp c3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K