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The IOMMU_CAP_CACHE_COHERENCY check only applies to the physical devices
that are IOMMU-backed. But it is now in the group code. If want to compile
vfio_group infrastructure out, this check needs to be moved out of the group
code.
Another reason for this change is to fail the device registration for the
physical devices that do not have IOMMU if the group code is not compiled
as the cdev interface does not support such devices.
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718135551.6592-25-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
5398be2564