vfio: Wait for dma-buf invalidation to complete

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dma-buf invalidation is handled asynchronously by the hardware, so VFIO
must wait until all affected objects have been fully invalidated.

In addition, the dma-buf exporter is expecting that all importers unmap any
buffers they previously mapped.

Fixes: 5d74781ebc ("vfio/pci: Add dma-buf export support for MMIO regions")
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20260131-dmabuf-revoke-v7-4-463d956bd527@nvidia.com

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Leon Romanovsky 2026-01-31 07:34:14 +02:00 • committed by Christian König

parent a408c0ca0c

commit 1a8a5227f2

1 changed files with 57 additions and 4 deletions

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drivers/vfio/pci/vfio_pci_dmabuf.c

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