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=-2.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 1DCCAC31681 for ; Mon, 21 Jan 2019 17:55:33 +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 E256E2084A for ; Mon, 21 Jan 2019 17:55:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WnpBkfXR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E256E2084A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=daenzer.net 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:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+GgjEWTjOyRn1igHQSKUMN1bVJ2D5b+6zAjOncu6zeM=; b=WnpBkfXRlhN8h3 u2i+X5jhQ2d6TCnR3Q6APbwx4IFmokCWGSFWBlk1o2SdKgx2TgtI01MlkhxNa0OGzHt/jpVbyBpkv 27NwmmhTcu7UIUszC5wplOJLdAxr1LLPGcQKk5zicS007kPIJRNl8TW0MMG5CHwOYUM/xNvlx/oAo eI/Ez9/qw6f1RgaX4KdT1pPW/6jKN/2VMNNt51W/bk+dg0Q3nsFNCmOl9jpCXGocidzsFlxReTJpt SzBtNWRVDniiXJmGq9Ov8cSCuFYhsaSakRXWDzIvHO4H77PhGuxzl4X2JKMCNvWHJz4dIskhxbQMM n0Nd+of6T2Q3zBvsfaMg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gldnA-00058N-JO; Mon, 21 Jan 2019 17:55:24 +0000 Received: from mail.netline.ch ([148.251.143.178] helo=netline-mail3.netline.ch) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gldn6-00056w-3I for linux-arm-kernel@lists.infradead.org; Mon, 21 Jan 2019 17:55:22 +0000 Received: from localhost (localhost [127.0.0.1]) by netline-mail3.netline.ch (Postfix) with ESMTP id 9FB932A6055; Mon, 21 Jan 2019 18:55:13 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at netline-mail3.netline.ch Received: from netline-mail3.netline.ch ([127.0.0.1]) by localhost (netline-mail3.netline.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id oDS3HFlYredT; Mon, 21 Jan 2019 18:55:13 +0100 (CET) Received: from thor (39.1.199.178.dynamic.wline.res.cust.swisscom.ch [178.199.1.39]) by netline-mail3.netline.ch (Postfix) with ESMTPSA id DFE7B2A6054; Mon, 21 Jan 2019 18:55:10 +0100 (CET) Received: from [::1] by thor with esmtp (Exim 4.92-RC4) (envelope-from ) id 1gldmv-0002S7-83; Mon, 21 Jan 2019 18:55:09 +0100 Subject: Re: [RFC PATCH] drm: disable WC optimization for cache coherent devices on non-x86 To: Ard Biesheuvel , Christoph Hellwig References: <20190121100617.2311-1-ard.biesheuvel@linaro.org> <20190121150734.GA30582@infradead.org> <20190121155908.GA8084@infradead.org> <20190121162238.GA17651@infradead.org> From: =?UTF-8?Q?Michel_D=c3=a4nzer?= Openpgp: preference=signencrypt Autocrypt: addr=michel@daenzer.net; prefer-encrypt=mutual; keydata= mQGiBDsehS8RBACbsIQEX31aYSIuEKxEnEX82ezMR8z3LG8ktv1KjyNErUX9Pt7AUC7W3W0b LUhu8Le8S2va6hi7GfSAifl0ih3k6Bv1Itzgnd+7ZmSrvCN8yGJaHNQfAevAuEboIb+MaVHo 9EMJj4ikOcRZCmQWw7evu/D9uQdtkCnRY9iJiAGxbwCguBHtpoGMxDOINCr5UU6qt+m4O+UD /355ohBBzzyh49lTj0kTFKr0Ozd20G2FbcqHgfFL1dc1MPyigej2gLga2osu2QY0ObvAGkOu WBi3LTY8Zs8uqFGDC4ZAwMPoFy3yzu3ne6T7d/68rJil0QcdQjzzHi6ekqHuhst4a+/+D23h Za8MJBEcdOhRhsaDVGAJSFEQB1qLBACOs0xN+XblejO35gsDSVVk8s+FUUw3TSWJBfZa3Imp V2U2tBO4qck+wqbHNfdnU/crrsHahjzBjvk8Up7VoY8oT+z03sal2vXEonS279xN2B92Tttr AgwosujguFO/7tvzymWC76rDEwue8TsADE11ErjwaBTs8ZXfnN/uAANgPLQjTWljaGVsIERh ZW56ZXIgPG1pY2hlbEBkYWVuemVyLm5ldD6IXgQTEQIAHgUCQFXxJgIbAwYLCQgHAwIDFQID AxYCAQIeAQIXgAAKCRBaga+OatuyAIrPAJ9ykonXI3oQcX83N2qzCEStLNW47gCeLWm/QiPY jqtGUnnSbyuTQfIySkK5AQ0EOx6FRRAEAJZkcvklPwJCgNiw37p0GShKmFGGqf/a3xZZEpjI qNxzshFRFneZze4f5LhzbX1/vIm5+ZXsEWympJfZzyCmYPw86QcFxyZflkAxHx9LeD+89Elx bw6wT0CcLvSv8ROfU1m8YhGbV6g2zWyLD0/naQGVb8e4FhVKGNY2EEbHgFBrAAMGA/0VktFO CxFBdzLQ17RCTwCJ3xpyP4qsLJH0yCoA26rH2zE2RzByhrTFTYZzbFEid3ddGiHOBEL+bO+2 GNtfiYKmbTkj1tMZJ8L6huKONaVrASFzLvZa2dlc2zja9ZSksKmge5BOTKWgbyepEc5qxSju YsYrX5xfLgTZC5abhhztpYhGBBgRAgAGBQI7HoVFAAoJEFqBr45q27IAlscAn2Ufk2d6/3p4 Cuyz/NX7KpL2dQ8WAJ9UD5JEakhfofed8PSqOM7jOO3LCA== Message-ID: <59ccf85d-b99d-b5c8-ea87-66c2a892e197@daenzer.net> Date: Mon, 21 Jan 2019 18:55:08 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-CA X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190121_095520_440331_FE6FDD5F X-CRM114-Status: GOOD ( 12.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Zhou , Michel Daenzer , Maxime Ripard , Will Deacon , Michael Ellerman , Maarten Lankhorst , Linux Kernel Mailing List , amd-gfx@lists.freedesktop.org, David Airlie , Huang Rui , dri-devel , Daniel Vetter , Benjamin Herrenschmidt , Junwei Zhang , Alex Deucher , Sean Paul , Christian Koenig , linux-arm-kernel Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjAxOS0wMS0yMSA1OjMwIHAubS4sIEFyZCBCaWVzaGV1dmVsIHdyb3RlOgo+IE9uIE1vbiwg MjEgSmFuIDIwMTkgYXQgMTc6MjIsIENocmlzdG9waCBIZWxsd2lnIDxoY2hAaW5mcmFkZWFkLm9y Zz4gd3JvdGU6Cj4gCj4+IFVudGlsIHRoYXQgaGFwcGVucyB3ZSBzaG91bGQganVzdCBjaGFuZ2Ug dGhlIGRyaXZlciBpZmRlZnMgdG8gZGVmYXVsdAo+PiB0aGUgaGFja3MgdG8gb2ZmIGFuZCBvbmx5 IGVuYWJsZSB0aGVtIG9uIHNldHVwcyB3aGVyZSB3ZSAxMDAlCj4+IHBvc2l0aXZlbHkga25vdyB0 aGF0IHRoZXkgYWN0dWFsbHkgd29yay4gIEFuZCBkb2N1bWVudCB0aGF0IGZhY3QKPj4gaW4gYmln IGZhdCBjb21tZW50cy4KPiAKPiBXZWxsLCBhcyBJIG1lbnRpb25lZCBpbiBteSBjb21taXQgbG9n IGFzIHdlbGwsIGlmIHdlIGRlZmF1bHQgdG8gb2ZmCj4gdW5sZXNzIENPTkZJR19YODYsIHdlIG1h eSBicmVhayB3b3JraW5nIHNldHVwcyBvbiBNSVBTIGFuZCBQb3dlciB3aGVyZQo+IHRoZSBkZXZp Y2UgaXMgaW4gZmFjdCBub24tY2FjaGUgY29oZXJlbnQsIGFuZCByZWxpZXMgb24gdGhpcwo+ICdv cHRpbWl6YXRpb24nIHRvIGdldCB0aGluZ3Mgd29ya2luZy4KCkZXSVcsIHRoZSBhbWRncHUgZHJp dmVyIGRvZXNuJ3QgcmVseSBvbiBub24tc25vb3BlZCB0cmFuc2ZlcnMgZm9yCmNvcnJlY3QgYmFz aWMgb3BlcmF0aW9uICh0aGUgc2NlbmFyaW8gQ2hyaXN0aWFuIGJyb3VnaHQgdXAgaXMgYSB2ZXJ5 CnNwZWNpYWxpemVkIHVzZS1jYXNlKSwgc28gdGhhdCBzaG91bGRuJ3QgYmUgYW4gaXNzdWUuCgoK LS0gCkVhcnRobGluZyBNaWNoZWwgRMOkbnplciAgICAgICAgICAgICAgIHwgICAgICAgICAgICAg ICBodHRwOi8vd3d3LmFtZC5jb20KTGlicmUgc29mdHdhcmUgZW50aHVzaWFzdCAgICAgICAgICAg ICB8ICAgICAgICAgICAgIE1lc2EgYW5kIFggZGV2ZWxvcGVyCgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlz dApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJh ZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==