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Thu, 2 Jul 2026 21:07:35 -0700 From: Nicolin Chen To: Will Deacon , Robin Murphy , "Joerg Roedel" , Bjorn Helgaas , "Jason Gunthorpe" CC: "Rafael J . Wysocki" , Len Brown , Pranjal Shrivastava , Mostafa Saleh , Lu Baolu , Kevin Tian , , , , , , , Shuai Xue Subject: [PATCH v5 04/18] iommu: Convert gdev->blocked from bool to enum gdev_blocked Date: Thu, 2 Jul 2026 21:06:29 -0700 Message-ID: <05da17325cf02758fb0eb3bde34c8ef2a22decbe.1783044582.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9DB:EE_|PH0PR12MB7012:EE_ X-MS-Office365-Filtering-Correlation-Id: 48ace43d-aef0-492f-7c80-08ded8b8a708 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|23010399003|7416014|376014|1800799024|36860700016|11063799006|56012099006|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: eO7xU3ojq/nhvQMtzOLRpEdTTq0pkIDvJ4cSlDZ9ncikWxg+tfOFnBZGvA93Vb/tYNDljds9tmWQnDiiCb1g3y9AChqGe4rTeDIZD7AnDw4lq3J/Su6KayqXKn8TqOpB+7yW2SiBzqHvM/rK8fZv+NdK6+gFrxbm/hNGRW+tVcU77XEPWZl7V82EY4Lk5vLhuM5Oe/NHdxoM4hxPskPXeogmR/a8znojx07EuURWyTouaMBLFeajXPghkYhFMyQXGcM8GtshN7GyPDyb4oG2FL3btZYiqSBEWJDwkOHqKFUxvmm+WNz9xKGtSQQam6kuLD97Ehdsy4uTfQVnpk69ANVoZ6uWIcoK5DaId/dgsBtZPlsDCcy9HvWY5zH9z7Xb4iTJM8bWYq3ECSJ0Egfbacn6TrCGyolt5pqOoSSAgQr9qWJCM4wphLXZBma09LyyvbAHS75pv5yyafUik/oRRrGjIa8bEfK/uTiCUgz/fmt9hknuRx9ulaW/Ksi98yuKheJo7HBmPXbWA8FT9d7ZoNZbh2lB+KU/vRvFgszNOLJ+RkdqS4yNVWqN7EBSehZH4d4oML3RfXqO5lYReHOaGv1hmEwoo0pjcfl0/wERLkXWPjyIYluvFM2lGzuz8XqNZXluqAyxN6CIcNJL0y+SIt5G5c3pP08wDhtalbYarjKOr/0dnT3dfCxZ8qIIrZWeqt82DGm6sHmWk470novnfQ== X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(23010399003)(7416014)(376014)(1800799024)(36860700016)(11063799006)(56012099006)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ysop+5lIvITLCViyoqvefVXQU+7itldkFkX8YmQo+GpYL1g2CNyXr/DGINpWZMVZB4iZYFtaF8O31Ij+bRh0NEFBylVVhnsp8ez4YTS1ApRYe9gYPJlUKUoVpobBQQWBBeMKDZReDsg/rNlNnlPoy5hcwhDdqycThk+p6Gr01XX5hHnqH1hgmMKG3zvlPjtYjUQ/aAZVOg35zIdroqGz3cXP0BuccALy9eHACRflhrsdkfkh9mRjdCJWOVZ3Wa9pBnmowm0zRRFkVC50JbKsy//mLzvrhzfj8elIs//tfvNL8JJD0JtfDfCcA++Gy/GZxiskTl2M7EQKuo8SwceS0+sNvUN3A93hhJuL5Gp1/07ZJgKR1v9wWcIAhTRNz6SqEfrO8ecpHTOfl8FksTptfdm7NW/hABSYQ4l6o0A1Ghxz/1Yo33iYO13RxJEzo4XH X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2026 04:07:52.0397 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 48ace43d-aef0-492f-7c80-08ded8b8a708 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9DB.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB7012 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260702_210800_192289_84C2F289 X-CRM114-Status: GOOD ( 13.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The gdev->blocked flag tracks whether a device is individually being held in the group->blocking_domain while group->domain is retained. Up to now, a PCI reset in flight is the only producer, so a bool suffices. Subsequent changes will add more reasons to keep a device blocked, e.g. a failed-reset case that must not auto-unblock, or a driver-side quarantine for a hardware fault. These reasons are cleared by different events, which a single bool cannot encode. Convert "bool blocked" into "enum gdev_blocked blocked", provisioned with two initial values: BLOCKED_NO and BLOCKED_RESETTING, for the existing use cases. All readers keep the "if (gdev->blocked)" form, as BLOCKED_NO == 0. This is a pure type change with no behavior change. Follow-on changes will add new enum values along with their producers. Assisted-by: Claude:claude-opus-4-7 Signed-off-by: Nicolin Chen --- drivers/iommu/iommu.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index e8f13dcebbde5..342e8a5ad628c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -73,16 +73,20 @@ struct iommu_group { void *owner; }; +enum gdev_blocked { + BLOCKED_NO = 0, /* Not blocked */ + BLOCKED_RESETTING, /* PCI reset in flight */ +}; + struct group_device { struct list_head list; struct device *dev; char *name; /* * Device is blocked for a pending recovery while its group->domain is - * retained. This can happen when: - * - Device is undergoing a reset + * retained. */ - bool blocked; + enum gdev_blocked blocked; unsigned int reset_depth; }; @@ -4072,7 +4076,7 @@ int pci_dev_reset_iommu_prepare(struct pci_dev *pdev) * the correct domain in iommu_driver_get_domain_for_dev() that might be * called in a set_dev_pasid callback function. */ - gdev->blocked = true; + gdev->blocked = BLOCKED_RESETTING; /* * Stage PASID domains at blocking_domain while retaining pasid_array. @@ -4198,7 +4202,7 @@ void pci_dev_reset_iommu_done(struct pci_dev *pdev) * the correct domain in iommu_driver_get_domain_for_dev() that might be * called in a set_dev_pasid callback function. */ - gdev->blocked = false; + gdev->blocked = BLOCKED_NO; /* * Re-attach PASID domains back to the domains retained in pasid_array. -- 2.43.0