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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Im22yX8NhgprNKugghBWmZHmzTyglWowef8EmoEFn6XuSInt9rsnyuC0q3hY9ZJ1U2/CWaSRIpXrJYc79W3oCFoS5ZK0RjYZOxxeI0EOlUFcSfs4wwWIZL2pfG+qxCSEVxPlRVv1iivOB74AGKmjY/mYoRSccZAPzDHdHnKFyRWquHBXRajQU0/4mmHkgXKFsFlom5ZvUXZozzdC4zVb4d+Br4xBaYGBlHm/Pf36QFGvYmXCzxiKCpgbl1JdgGj4z2kuJLZjXFUDAlFYq776FnWIc+E27rjt7k3dtHorXN7VIL4DFgL92sen4RVlNXJ193H35nE51Ho7WTnnl+KRtISasTt+I5cljQnrMYFZ/IZvjXHdLN58MgXmFlHQNthSIqnhBtNUfiQoMhwnjLnaAwRMR1Ssb0AK9IxcNxYUryF6aJ3luixK53xJSo9Ayb+K X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Nov 2026 18:34:16.8448 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 854d2d0f-1320-4c39-9841-08df39d91138 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: CY8PEPF00000051.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CHAPR12MB999249 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 the "bool blocked" into "enum blocked_reason blocked", provisioned with two initial values: BLOCKED_NONE and BLOCKED_RESETTING, covering the existing use cases. All readers keep the "if (gdev->blocked)" form, since BLOCKED_NONE == 0. This is a pure type change with no behavior change. Follow-on changes will add new enum values along with their producers. Reviewed-by: Jason Gunthorpe Reviewed-by: Lu Baolu 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 b486b8bbd1fcd..ee026f5f14349 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -73,16 +73,20 @@ struct iommu_group { void *owner; }; +enum blocked_reason { + BLOCKED_NONE = 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 blocked_reason 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_NONE; /* * Re-attach PASID domains back to the domains retained in pasid_array. -- 2.43.0