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Thu, 10 Oct 2019 15:44:34 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3030.oracle.com with ESMTP id 2vh8k33g1g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Oct 2019 15:44:34 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x9AFiVnQ002522; Thu, 10 Oct 2019 15:44:31 GMT Received: from bostrovs-us.us.oracle.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 10 Oct 2019 08:44:31 -0700 Subject: Re: [PATCH v2] xen: Stop abusing DT of_dma_configure API To: Rob Herring Cc: Oleksandr Andrushchenko , "xen-devel@lists.xenproject.org" , "linux-kernel@vger.kernel.org" , Robin Murphy , Julien Grall , Nicolas Saenz Julienne , Juergen Gross , Stefano Stabellini , Christoph Hellwig References: <20191008194155.4810-1-robh@kernel.org> <362d1eac-e352-d8de-1b6f-586acc0007ce@oracle.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9405 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100145 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9405 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100145 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/10/19 11:32 AM, Rob Herring wrote: > On Thu, Oct 10, 2019 at 9:00 AM Boris Ostrovsky > wrote: >> On 10/9/19 7:42 AM, Oleksandr Andrushchenko wrote: >>> On 10/8/19 10:41 PM, Rob Herring wrote: >>>> As the removed comments say, these aren't DT based devices. >>>> of_dma_configure() is going to stop allowing a NULL DT node and calling >>>> it will no longer work. >>>> >>>> The comment is also now out of date as of commit 9ab91e7c5c51 ("arm64: >>>> default to the direct mapping in get_arch_dma_ops"). Direct mapping >>>> is now the default rather than dma_dummy_ops. >>>> >>>> According to Stefano and Oleksandr, the only other part needed is >>>> setting the DMA masks and there's no reason to restrict the masks to >>>> 32-bits. So set the masks to 64 bits. >>>> >>>> Cc: Robin Murphy >>>> Cc: Julien Grall >>>> Cc: Nicolas Saenz Julienne >>>> Cc: Oleksandr Andrushchenko >>>> Cc: Boris Ostrovsky >>>> Cc: Juergen Gross >>>> Cc: Stefano Stabellini >>>> Cc: Christoph Hellwig >>>> Cc: xen-devel@lists.xenproject.org >>>> Signed-off-by: Rob Herring >>> Acked-by: Oleksandr Andrushchenko >> >> Is this going to go via drm tree or should I pick it up for Xen tree? > Please apply to the Xen tree. Ok. FTR, Reviewed-by: Boris Ostrovsky