iommu/vt-d: Add helper to setup pasid nested translation

Browse source

The configurations are passed in from the user when the user domain is
allocated. This helper interprets these configurations according to the
data structure defined in uapi/linux/iommufd.h. The EINVAL error will be
returned if any of configurations are not compatible with the hardware
capabilities. The caller can retry with another compatible user domain.
The encoding of fields of each pasid entry is defined in section 9.6 of
the VT-d spec.

Link: https://lore.kernel.org/r/20231026044216.64964-5-yi.l.liu@intel.com
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

...

This commit is contained in:

Lu Baolu 2023-10-25 21:42:12 -07:00 • committed by Jason Gunthorpe

parent 79ae1eccd3

commit 111bf85c68

2 changed files with 114 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

112

drivers/iommu/intel/pasid.c

View file

2

drivers/iommu/intel/pasid.h

View file