iommu aux-domain APIs extensions

Hi Joerg and Alex,

A description of purpose for this series could be found here.

https://lore.kernel.org/linux-iommu/[email protected]/

The previous version was posted here.

https://lore.kernel.org/linux-iommu/[email protected]/

This version is evolved according to Joerg's comments posted here.

https://lore.kernel.org/linux-iommu/[email protected]/

This basic idea is that IOMMU registers an iommu_ops for subdevice bus (for example, the vfio/mdev bus), so that the upper layer device passthrough framework could use the standard iommu-core code to setup the IOMMU logistics.

This series was tested by Dave Jiang <[email protected]> with his idxd driver posted here. Very appreciated!

https://lore.kernel.org/lkml/160021250454.67751.3119489448651243709.stgit@djiang5-desk3.ch.intel.com/

Please help to review and comment.

Best regards,
baolu

Lu Baolu (5):
vfio/mdev: Register mdev bus earlier during boot
iommu: Use bus iommu ops for aux related callback iommu/vt-d: Make some static functions global iommu/vt-d: Add iommu_ops support for subdevice bus vfio/type1: Use mdev bus iommu_ops for IOMMU callbacks

 drivers/iommu/intel/Kconfig      |  13 ++++
 drivers/iommu/intel/Makefile     |   1 +
 drivers/iommu/intel/iommu.c      |  79 +++++--------------
 drivers/iommu/intel/siov.c       | 119 ++++++++++++++++++++++++++++
 drivers/iommu/iommu.c            |  16 ++--
 drivers/vfio/mdev/mdev_core.c    |  22 +-----
 drivers/vfio/mdev/mdev_driver.c  |   6 ++
 drivers/vfio/mdev/mdev_private.h |   1 -
 drivers/vfio/vfio_iommu_type1.c  | 128 +++----------------------------
 include/linux/intel-iommu.h      |  53 +++++++++++++
 include/linux/mdev.h             |  14 ----
 11 files changed, 236 insertions(+), 216 deletions(-)
 create mode 100644 drivers/iommu/intel/siov.c

2.25.1