Hi Joerg and Alex, A description of purpose for this series could be found here.
https://lore.kernel.org/linux-iommu/20200901033422.22249-1-baolu...@linux.intel.com/ The previous version was posted here. https://lore.kernel.org/linux-iommu/20200922061042.31633-1-baolu...@linux.intel.com/ This version is evolved according to Joerg's comments posted here. https://lore.kernel.org/linux-iommu/20200924095532.gk27...@8bytes.org/ 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 <dave.ji...@intel.com> with his idxd driver posted here. Very appreciated! https://lore.kernel.org/lkml/160021250454.67751.3119489448651243709.st...@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
