Add a sanity of the broken_unmanaged_domain flag to reject the use of iommufd in the early stage, if the flag is set by the iommu driver. Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx> --- drivers/iommu/iommufd/device.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index d81f93a321af..41b55615a693 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -73,6 +73,9 @@ struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx, if (!device_iommu_capable(dev, IOMMU_CAP_CACHE_COHERENCY)) return ERR_PTR(-EINVAL); + if (!device_iommu_unmanaged_supported(dev)) + return ERR_PTR(-EINVAL); + group = iommu_group_get(dev); if (!group) return ERR_PTR(-ENODEV); -- 2.39.1
