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[3/4] iommufd: Do not allocate device object if broken_unmanaged_domain

Message ID 74f7033192488c472ca04b7d03e4dc5705f80cc0.1674849118.git.nicolinc@nvidia.com (mailing list archive)
State New, archived
Headers show
Series iommu: Reject drivers with broken_unmanaged_domain | expand

Commit Message

Nicolin Chen Jan. 27, 2023, 8:04 p.m. UTC
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@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
 drivers/iommu/iommufd/device.c | 3 +++
 1 file changed, 3 insertions(+)
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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);