iommu: Add iommu_group_has_isolated_msi()

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Compute the isolated_msi over all the devices in the IOMMU group because
iommufd and vfio both need to know that the entire group is isolated
before granting access to it.

Link: https://lore.kernel.org/r/2-v3-3313bb5dd3a3+10f11-secure_msi_jgg@nvidia.com
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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This commit is contained in:

Jason Gunthorpe 2022-12-09 13:23:08 -04:00

parent 17cde5e601

commit efc30a8f15

2 changed files with 27 additions and 0 deletions

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26

drivers/iommu/iommu.c

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1

include/linux/iommu.h

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