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Wed, 22 Oct 2025 19:24:59 -0700 Date: Wed, 22 Oct 2025 19:24:57 -0700 From: Nicolin Chen To: Suravee Suthikulpanit CC: , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v4 09/16] iommu/amd: Always enable GCR3TRPMode when supported. Message-ID: References: <20251021014324.5837-1-suravee.suthikulpanit@amd.com> <20251021014324.5837-10-suravee.suthikulpanit@amd.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251021014324.5837-10-suravee.suthikulpanit@amd.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00004689:EE_|CH2PR12MB4104:EE_ X-MS-Office365-Filtering-Correlation-Id: 45b1edf1-ec4b-40cd-998f-08de11db651b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|82310400026|36860700013|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?rPd+EprUwdQFZv7SZOSirh5szjwk1weyxzLBP7/Lli1RDYSZk5pkKHWicKB2?= =?us-ascii?Q?SRyso31YvGdFWqJLnxwnsZhZtYYgUobdH/DyF8FZCumu8lo+sjHREa5lkkdG?= =?us-ascii?Q?AcTtjgy76E3WiTsZRb6BOesFV8bXV6fAnlpol3RPkc9SMaDWVPzaiVfpuqTs?= =?us-ascii?Q?ZnY5jp5VXDuysesYRmX53697glxDBBBS8OxYPO/4qJgXSbndKq5v2hhLiThu?= =?us-ascii?Q?ZtRBVCfbaV0OYTQStFXdLLnMWraBl3ytVF34pt8d93IYRyi7NN+6dA13cj70?= =?us-ascii?Q?sfMS00lvsFGwYjnyN2ibDd/ui166BDpUl9ZN2GOH4UB+1b0f0BBsTsKYds/8?= =?us-ascii?Q?7PKDc1rvH5vnSm7dgVATfBjBXGUyMOzJFEiri5u55dE1MiAJ6ilIMxGv2luy?= =?us-ascii?Q?irAso86IoH4nnj/CuEaFm43XDKrHJB7DnCbWdJVMkcAsMAR5Xbb8VWtv0otK?= =?us-ascii?Q?kDnp2huwAekzs0SupL9tra2xM9EGl/U3Mr/8XCJhZQfTWbbTVJstMQU2njjV?= =?us-ascii?Q?1L79/vw9G2g3M0n5BuMb2EA81c1cZ1L5eSvdbcD6C6ly2gjsbM20BhtQJlq6?= =?us-ascii?Q?e1/PS5n21CexR5Eb4m3c188gby047JgG0lfmzMyd83WVjSpeDS1UU3G6Qg8K?= =?us-ascii?Q?2+kd05Yn5LkKsbyr1iHbotRCCUZ2fQLBqccdR0PS7txUbwAcmmjWKPQIH30g?= =?us-ascii?Q?Q6qQZYkMeNBEx3NKTYzv2Qlmc5TV4MeZ+FIptL0t62vAZrbR+tqF3XillNI0?= =?us-ascii?Q?DWt8hPiHG/obI5t/k+f6m2YfnH8ESbCeFInxLF+Qgu43l1ZexvJ1IFBgcKVE?= =?us-ascii?Q?rjNyK0dksiPn22acHuVwpJOn6hI/UF+jtsJHQXPWVFtkdgThm+op2TuLPHVj?= =?us-ascii?Q?GNO1QJF6zeiAghZ53fYSQgdkw26XxK8pz0DyjNGReO/tGxTAl8WZFixQ7Nbg?= =?us-ascii?Q?LTbvU5gmNfTKKMoVGlH+te/Ox/Ztb/wG7VqKbRmt8MVkN020oaNfFRyKZnOK?= =?us-ascii?Q?mDjwZMGneNEsErOSjSNNBz/T2KjvYOVM2nJ4VA14PmBXoNeKv9tPn+KFrajB?= =?us-ascii?Q?1MTYIS8dMlIV/+J2Uq5i6+StlMS9HZyNg0D7VH1P/JiL6YLqXTdAz4ksiSH2?= =?us-ascii?Q?5EhgW7RORFigEpcScxNMRBIPV7qYVkLkWCfwk2d0RxpoZgbvZAq+3RWFGCt8?= =?us-ascii?Q?sEZAhzAPu0jPVG+okgnG5nd/hQWfbOpTZSqreg80PJggYaF+4oncqEuo1Ev5?= =?us-ascii?Q?zAKfsFcl1k//UnVYDbZhAnbB7lVsp3908ZR/b2kAn6sqV/n5eL67LE8A7AL1?= =?us-ascii?Q?rx/pT23hMt1BA5ptghszhK15PEZtPX3iVKGyLz1tWcqbFNsVjqo9k05Tlpub?= =?us-ascii?Q?FtiseGMNf2SMAu++Ff8OOyjLWY1bicuOE8TY3YufKjIxxWcXrK7Tu3Cif6kD?= =?us-ascii?Q?vt7SfXh45Ycu6vySEn6qniz1gkJwcumDuMjQv0zCyiQEVpWX0WJR9hND1MXe?= =?us-ascii?Q?FnVhkUMU2YwBE1b5O6oMfXZMly7tYEZ2VU0swekoJIS5Li9pPlNT2QX9F/nI?= =?us-ascii?Q?WiEttlbrIxNqkg73S+Q=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(82310400026)(36860700013)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Oct 2025 02:25:12.3108 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 45b1edf1-ec4b-40cd-998f-08de11db651b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00004689.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4104 On Tue, Oct 21, 2025 at 01:43:17AM +0000, Suravee Suthikulpanit wrote: > The GCR3TRPMode feature allows the DTE[GCR3TRP] field to be configured > with GPA (instead of SPA). This simplifies the implementation, and is > a pre-requisite for nested translation support. > > Therefore, always enable this feature if available. > > Reviewed-by: Jason Gunthorpe > Signed-off-by: Suravee Suthikulpanit Reviewed-by: Nicolin Chen