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Mon, 24 May 2021 15:49:42 +0000 Date: Mon, 24 May 2021 11:49:34 -0400 From: Konrad Rzeszutek Wilk To: Claire Chang Cc: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski , benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , Tomasz Figa , bskeggs@redhat.com, Bjorn Helgaas , chris@chris-wilson.co.uk, Daniel Vetter , airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, Jianxiong Gao , joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com Subject: Re: [PATCH v7 04/15] swiotlb: Add restricted DMA pool initialization Message-ID: References: <20210518064215.2856977-1-tientzu@chromium.org> <20210518064215.2856977-5-tientzu@chromium.org> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Originating-IP: [130.44.160.152] X-ClientProxiedBy: BL1PR13CA0277.namprd13.prod.outlook.com (2603:10b6:208:2bc::12) To BYAPR10MB2999.namprd10.prod.outlook.com (2603:10b6:a03:85::27) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from 0xbeefdead.lan (130.44.160.152) by BL1PR13CA0277.namprd13.prod.outlook.com (2603:10b6:208:2bc::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4173.11 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?k9f+vLSIXL2AAotnAoM310FgTBO9E/Tn5j89La1JVNOr6k+sevJwvUJVSwpg?= =?us-ascii?Q?+xAtaN56ylkbLbAtdMQCI+KgCP8oG55l/wcUkPZfqNVpiFkPhMsMIKIzwsCf?= =?us-ascii?Q?La3ESSrr5RRXv9eCjAjFxhzOYTAhowuq6BRMC78qhHxBawZdp09tNvYiEx2s?= =?us-ascii?Q?O1yQHeu+y6ZAJ3h+nBdrLp06csxRDJckDG44OKOh1ZMFxEXBSvi/WrnvjuXo?= =?us-ascii?Q?MJtx0UW6OATFRZ1yxhxVZZRTMvqF4SpIBoxTaayvCAYROoPeJXZUvXm+a8n4?= =?us-ascii?Q?jd6JOyQgPbER1EDgWKsugoiIudHgFi6r6Ac9HutqFHXQyTlSqxjYsSWZZyGJ?= =?us-ascii?Q?aKjuK7UNIW6mpOsMuiKN5Ng/L+2I5MPy9BrtFzqJzVTZgrjY4wt1RUhP+moC?= =?us-ascii?Q?t3/nbvHEviKgCzT52k8TBvbPU3pV33tuJgF08RNTNGryYMM/cbfFRRbbWr/i?= =?us-ascii?Q?n2e36kdr89XdCXnsk9d6I6UORivqvQS7O3MCJ+mMT1d9lhldFjcaThxYrb2i?= =?us-ascii?Q?LVUE6jltznawf1ksouo5Zw34WW0h0pkjxjWS6GumfpDxPvMzk8qcqrzdCUak?= =?us-ascii?Q?Sx4k2rH/9A1P8wK8YzyuUWG0uPr81ix2Inmxh4bmxFsotZ/Oi9UYwW9+Ortz?= =?us-ascii?Q?VsxUk9zqRtTOLHSBbqz26N9i1hTN6yrn4aKZ5u6gCKNElb46TXWSvSL2iDv2?= =?us-ascii?Q?bSlfYMWFkjLaeRQsn1GuJC0o6TwhLrb8FK9du9SyG7X+CkCHArX1ETVbFdgz?= =?us-ascii?Q?GcLX326cTexW8+AduVoRyjf+vEqKsRSKJ7q9fK9IbYg+ItQm5E23tV0l4QS3?= =?us-ascii?Q?BvwxpQu3rsxpS1qopT8dECAfcnRy9tGIeohJ28+ZeJIs1uT6ronTRjsa5/x5?= =?us-ascii?Q?VBgxeYEu1Il2Oq9vYBrmvxH+A2yN1tL61S7Naklc8kyuME+1tNx+UKNlaItj?= =?us-ascii?Q?ThX8uQBsAAnsuB9Gl+/g4M7lmNBdGvqF58ULveJP+aAbfRYApLggD8tg4DAP?= =?us-ascii?Q?lTeEvBmRSNR/Sy6DTujsQYXqgNSDGvreiWZkNieTTuIOQf7DiM4B23b6Ou91?= =?us-ascii?Q?juMRW6uWO8UI/bVgh4OZpiDrloKbxvHVWy0PgPo0+8+4PA1ZNutFfg5h4KeY?= =?us-ascii?Q?TyLG/FpQrnwxMpMpCyQJOkRoiOtNnz60ZUTu1or0zdzKx9NERg1fZPTT0FOg?= =?us-ascii?Q?myMv/LVetsta3AMlvob2eefW5cmcynI+UNXaNBiUhB+VJRflTflL42nxpygQ?= =?us-ascii?Q?568Eu66EpI0EYtK1yYoo3hOS1ZSoaUXh+ISDyJtd32+OBM3BLzD2/CwIlQy8?= =?us-ascii?Q?cDaLh+rE4ay997dj46IpjMVL?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7fbcc4c1-d792-4494-6e1a-08d91ecb8ba4 X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB2999.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 May 2021 15:49:42.1378 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9ONLz8Bfpzu4dW5SAWlMShnXYqz6E4cTtE5FYaSGri6EldOiEB9lf4uzrqlC2CAxWiekmOaDtACIhVsQZuQ4XQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB4116 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=9993 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 phishscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 spamscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105240095 X-Proofpoint-GUID: jyInOp7QVZfBwaP2UbNyQz4q__eAGIgp X-Proofpoint-ORIG-GUID: jyInOp7QVZfBwaP2UbNyQz4q__eAGIgp Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 18, 2021 at 02:48:35PM +0800, Claire Chang wrote: > I didn't move this to a separate file because I feel it might be > confusing for swiotlb_alloc/free (and need more functions to be > non-static). > Maybe instead of moving to a separate file, we can try to come up with > a better naming? I think you are referring to: rmem_swiotlb_setup ? Which is ARM specific and inside the generic code? Christopher wants to unify it in all the code so there is one single source, but the "you seperate arch code out from generic" saying makes me want to move it out. I agree that if you move it out from generic to arch-specific we have to expose more of the swiotlb functions, which will undo's Christopher cleanup code. How about this - lets leave it as is now, and when there are more use-cases we can revisit it and then if need to move the code?