iommufd: Allow MMIO pages in a batch

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Addresses intended for MMIO should be propagated through to the iommu with
the IOMMU_MMIO flag set.

Keep track in the batch if all the pfns are cachable or mmio and flush the
batch out of it ever needs to be changed. Switch to IOMMU_MMIO if the
batch is MMIO when mapping the iommu.

Link: https://patch.msgid.link/r/5-v2-b2c110338e3f+5c2-iommufd_dmabuf_jgg@nvidia.com
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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This commit is contained in:

Jason Gunthorpe 2025-11-21 11:51:02 -04:00

parent fc7063abd9

commit 3114c67440

1 changed files with 24 additions and 5 deletions

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drivers/iommu/iommufd/pages.c

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