RE: [PATCH v3 1/5] vfio: Do not allow !ops->dma_unmap in vfio_pin/unpin_pages()

From: Nicolin Chen nicolinc@nvidia.com Sent: Saturday, February 25, 2023 9:52 AM

A driver that doesn't implement ops->dma_unmap shouldn't be allowed to do vfio_pin/unpin_pages(), though it can use vfio_dma_rw() to access an iova range. Deny !ops->dma_unmap cases in vfio_pin/unpin_pages().

Suggested-by: Kevin Tian kevin.tian@intel.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com

Reviewed-by: Kevin Tian kevin.tian@intel.com