From:   "Tian, Kevin" <kevin.tian@intel.com>
To:     Jacob Pan <jacob.jun.pan@linux.intel.com>,
        LKML <linux-kernel@vger.kernel.org>,
        "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Joerg Roedel <joro@8bytes.org>,
        Jean-Philippe Brucker <jean-philippe@linaro.com>,
        "Robin Murphy" <robin.murphy@arm.com>
CC:     David Woodhouse <dwmw2@infradead.org>,
        "Raj, Ashok" <ashok.raj@intel.com>,
        "Liu, Yi L" <yi.l.liu@intel.com>, Jason Gunthorpe <jgg@nvidia.com>
Subject: RE: [PATCH 0/2] Remove VT-d virtual command interface
Thread-Topic: [PATCH 0/2] Remove VT-d virtual command interface
Thread-Index: AQHZPaM3VgQAfogEmEKOT5D57uzx1a7MMMnA
Date:   Mon, 13 Feb 2023 02:52:52 +0000
Message-ID: <BL1PR11MB52710ED111526C1CC580273E8CDD9@BL1PR11MB5271.namprd11.prod.outlook.com>
References: <20230210230206.3160144-1-jacob.jun.pan@linux.intel.com>
In-Reply-To: <20230210230206.3160144-1-jacob.jun.pan@linux.intel.com>
Accept-Language: en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?yIvGLKL6c28pytxXoQC9Hg96Y5JQUxeU4DOIJVc4St/IueK4chBhmddtSNCV?=
 =?us-ascii?Q?WStP9zbMgIkUrrDtyrsYZ60/fw9I6zWyX2fWa0vrGjavYEiFVdK0Wcj9C4MF?=
 =?us-ascii?Q?5Ko9iNQT2zOFjit75ZeGJzat/MmSUXX7rEXeKS2+ZhgGNsxzbmIJFD4/6Ydi?=
 =?us-ascii?Q?GPWv0fFeKrsb8rVMw9KMZ+BMkdM4MZf6mffqQk5ZYN2Xq+ZKQteEq0iBwLPv?=
 =?us-ascii?Q?6gPeb5U9NdmAOeZVWI/BkucPUN0fzyontecIiKETWsysI+phh8Deo/NytE9+?=
 =?us-ascii?Q?TQL4vt2ZGTZ2VOFYXobMrKuluWZEdaMw7OM80odeuQN1cSKNCz/iqMvjX5ZD?=
 =?us-ascii?Q?RmxBUcGwEOImAu/JfjyxHgLprK6jKrkoZ3665kSBN04rt2DbtFgeB815NboA?=
 =?us-ascii?Q?pe4tvwqKPlOxY6q171l2lQMm7a5qpeZQBE89a54VbjIdC63+RPaautNU6zbu?=
 =?us-ascii?Q?itNjbt3x6WRXyuA6tLLS9aB2GSbKyoktE9ZXDgNiVdNrvVWLhZ/vukXeqav7?=
 =?us-ascii?Q?MvBjK244kRMs1FdCop2TXbKQHbVuHbSpaSk1G86Eph6/f0viJC8IJg/j/hHT?=
 =?us-ascii?Q?n3aElGrfCIVqHAyI2qv8+ATuv7jJPYQPuV3dDxgdOCP/hk99jF8ju22qJRRj?=
 =?us-ascii?Q?KukDzblQRXpDdpOP4p2V8pyeH91a/i5pfMA/RwPvfux4Htjp6Q53BoDAFrcB?=
 =?us-ascii?Q?xG1lX2f+StuwpciPz8O5Z5SwzyWFyI/Kuzbrw9TepDLF4O8Dxr0zoIDoGDhk?=
 =?us-ascii?Q?ztkqdTs1UZa0IAZPn4Af88P4E77pqUjctYkbGoTe/0HQ6fqVI8morowvytKc?=
 =?us-ascii?Q?jtcvdI4+dGi4T4hO0tMgPKdUW8TMNx1GWz13+nlEiVmlCBWBzYhPkRaKWAAg?=
 =?us-ascii?Q?hDkbkaUSB9DmXgUxJZN319JOhHRLEDU2Kvx6tNxhnLb6GcLbnoOYVNdRW+JL?=
 =?us-ascii?Q?pfib3oolzRy0ZGnO6NZxTHc0JFZiyKd5Z0YYyvFu1qSn041LcFTdJFNZzUBG?=
 =?us-ascii?Q?l6wShR4aLbnNG0KY1GdOBlevbZ9Y5TWzEdTRd95h2urCN8sHC1lsw+NwkB+m?=
 =?us-ascii?Q?XsbwpRXuA53+UVgrqxbp9qqdXzKugkZBt+fy6mp88lkgimUZD3JjxHFfCm90?=
 =?us-ascii?Q?BFzdklquKHDGyLgh8MBZPcFnOOyAga1965ouqEBtEnqlCkkFDn63YD92vwaM?=
 =?us-ascii?Q?pQaso3hMAy6nlZbPrVHQRa5qAxh2PDaEQBaaC5WU5SXMgmki0SvqnPj+Wfis?=
 =?us-ascii?Q?e39wEX2jdXnZsT0yzUzFdYzW7pHIbwCbzpLUfujAhR1n094AYuAgrWVsjGl+?=
 =?us-ascii?Q?15fJj7aTo400YjH7uh8YoSPWVJql1KiMIE1gsycl4CDRW7qnpMa3IA30zMGe?=
 =?us-ascii?Q?5OrLj8A/5De7i/SdN2O5TVz39Q5DjA23rR1p0a8OI9dfJiuc/1f2GPWSwFn0?=
 =?us-ascii?Q?b5GYN0hAGGY2m5QSOLlA24pdUCcbTERRArx+JHlExR1dw8oVwNR1zcWpaRkD?=
 =?us-ascii?Q?xtHTRDbi5tMLoAzOzx4htBbCGpSGMt3W1bCZZndebkggg5MhjRXP0MtyuQn5?=
 =?us-ascii?Q?dMtFzESc7pKwxQbFcjSzcShhuHZYl7OAlSByem0C?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: BL1PR11MB5271.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: c981ac57-db16-44cb-e4ae-08db0d6d66b8
X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Feb 2023 02:52:52.8578
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: 3qfSPZ76pkypdrKktn1caNp7aXyJ1dEXdDXh8o6cC/ZTyx/ldeYhYcl3RNlrwHShX5vKYgJiCulzR+XYlZsMQw==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR11MB6051
X-OriginatorOrg: intel.com
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> From: Jacob Pan <jacob.jun.pan@linux.intel.com>
> Sent: Saturday, February 11, 2023 7:02 AM
>=20
> Hi all,
>=20
> This patch set removes unused VT-d virtual command interface followed by
> clean up in the IOASID code.
>=20
> This has only been tested on x86 platforms, need help with testing on ARM
> SMMU and other architectures.
>=20
> I also hope to collect feedback on the upcoming clean up and enhancements
> below:
> 1. Consolidate VT-d private SVA PASID array with IOASID common code
> 2. As we retain the global IOASID allocator, we need some level of resour=
ce
> management. I want to restart the effort to include IOASID under misc
> cgroup.
> (https://lore.kernel.org/linux-iommu/20210303160205.151d114e@jacob-
> builder/)
>=20

this should go with adding global pasid allocator to iommufd.

before that we don't have such cgroup requirement.