iommu: Turn fault_data to iommufd private pointer

Browse source

A "fault_data" was added exclusively for the iommufd_fault_iopf_handler()
used by IOPF/PRI use cases, along with the attach_handle. Now, the iommufd
version of the sw_msi function will reuse the attach_handle and fault_data
for a non-fault case.

Rename "fault_data" to "iommufd_hwpt" so as not to confine it to a "fault"
case. Move it into a union to be the iommufd private pointer. A following
patch will move the iova_cookie to the union for dma-iommu too after the
iommufd_sw_msi implementation is added.

Since we have two unions now, add some simple comments for readability.

Link: https://patch.msgid.link/r/ee5039503f28a16590916e9eef28b917e2d1607a.1740014950.git.nicolinc@nvidia.com
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

...

This commit is contained in:

Nicolin Chen 2025-02-19 17:31:40 -08:00 • committed by Jason Gunthorpe

parent 96093fe54f

commit 748706d7ca

3 changed files with 6 additions and 4 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

2

drivers/iommu/iommufd/fault.c

View file

2

drivers/iommu/iommufd/hw_pagetable.c

View file

6

include/linux/iommu.h

View file