[PATCH v2 0/3] Remove iommu_group_remove_device() from fsl

Jason Gunthorpe jgg at nvidia.com
Wed May 17 10:35:25 AEST 2023

With POWER SPAPR now having a real iommu driver and using the normal group
lifecycle stuff fixing FSL will leave only VFIO's no-iommu support as a
user for the iommu_group_add/remove_device() calls. This will help
simplify the understanding of what the core code should be doing for these

Fix FSL to not need to call iommu_group_remove_device() at all.

 - Change the approach to use driver_managed_dma
 - Really simplify fsl_pamu_device_group() and just put everything in one
 - New patch to make missing OF properties a probe failure
v1: https://lore.kernel.org/r/0-v1-1421774b874b+167-ppc_device_group_jgg@nvidia.com

Jason Gunthorpe (3):
  iommu/fsl: Always allocate a group for non-pci devices
  iommu/fsl: Move ENODEV to fsl_pamu_probe_device()
  iommu/fsl: Use driver_managed_dma to allow VFIO to work

 arch/powerpc/sysdev/fsl_pci.c   |   1 +
 drivers/iommu/fsl_pamu_domain.c | 123 +++++++++-----------------------
 2 files changed, 36 insertions(+), 88 deletions(-)

base-commit: 1421774b874bfd5fd1b2b05b59b67c0c5e0d513e

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