iommufd: Add iommufd_ctx_has_group()

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This adds the helper to check if any device within the given iommu_group
has been bound with the iommufd_ctx. This is helpful for the checking on
device ownership for the devices which have not been bound but cannot be
bound to any other iommufd_ctx as the iommu_group has been bound.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718105542.4138-5-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Yi Liu 2023-07-18 03:55:36 -07:00 • committed by Alex Williamson

parent eda175dfe2

commit 86b0a96c29

2 changed files with 32 additions and 0 deletions

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30

drivers/iommu/iommufd/device.c

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2

include/linux/iommufd.h

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