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[v2,0/3] Cleanup around iommu_set_fault_handler()

Message ID 0-v2-25fc75484cab+ab-iommu_set_fault_jgg@nvidia.com (mailing list archive)
Headers
Series Cleanup around iommu_set_fault_handler() |

Message

Jason Gunthorpe Nov. 6, 2025, 8:34 p.m. UTC 
report_iommu_fault() is an older API that has been superseded by
iommu_report_device_fault() which is capable to support PRI.

Only four external drivers consume this via iommu_set_fault_handler()
  drivers/remoteproc/omap_remoteproc.c
  drivers/remoteproc/qcom_q6v5_adsp.c
  drivers/gpu/drm/msm
  drivers/infiniband/hw/usnic

Remove the use in usnic as the iommu driver logging is good enough these
days.

Remove generation support from the AMD iommu driver since msm and two
remoteproc drivers are not used on AMD x86 CPUs.

Fail iommu_set_fault_handler() if the underlying iommu driver does not
support it.

v2:
 - Revise commit messages
 - Move report_iommu_fault_supported into the struct iommu_ops
 - Put back the pr_err in the AMD driver
v1: https://patch.msgid.link/r/0-v1-391058a85f30+14b-iommu_set_fault_jgg@nvidia.com

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Jason Gunthorpe (3):
  RDMA/usnic: Remove iommu_set_fault_handler()
  iommu/amd: Don't call report_iommu_fault()
  iommu: Allow drivers to say if they use report_iommu_fault()

 drivers/infiniband/hw/usnic/usnic_uiom.c | 13 -------------
 drivers/iommu/amd/iommu.c                |  7 -------
 drivers/iommu/arm/arm-smmu/arm-smmu.c    |  1 +
 drivers/iommu/arm/arm-smmu/qcom_iommu.c  |  1 +
 drivers/iommu/iommu.c                    |  6 +++++-
 drivers/iommu/ipmmu-vmsa.c               |  1 +
 drivers/iommu/mtk_iommu.c                |  1 +
 drivers/iommu/mtk_iommu_v1.c             |  1 +
 drivers/iommu/omap-iommu.c               |  1 +
 drivers/iommu/rockchip-iommu.c           |  1 +
 drivers/iommu/sun50i-iommu.c             |  1 +
 include/linux/iommu.h                    |  3 +++
 12 files changed, 16 insertions(+), 21 deletions(-)


base-commit: 211ddde0823f1442e4ad052a2f30f050145ccada