[Linaro-mm-sig] Re: [PATCH v7 10/11] vfio/pci: Add dma-buf export support for MMIO regions

On Thu, 6 Nov 2025 16:16:55 +0200 Leon Romanovsky leon@kernel.org wrote:

diff --git a/drivers/vfio/pci/vfio_pci_dmabuf.c b/drivers/vfio/pci/vfio_pci_dmabuf.c new file mode 100644 index 000000000000..cbf502b14e3c --- /dev/null +++ b/drivers/vfio/pci/vfio_pci_dmabuf.c

...

+int vfio_pci_core_feature_dma_buf(struct vfio_pci_core_device *vdev, u32 flags,

• 		  struct vfio_device_feature_dma_buf __user *arg,
  

• 		  size_t argsz)
  

+{

• struct vfio_device_feature_dma_buf get_dma_buf = {};
• struct vfio_region_dma_range *dma_ranges;
• DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
• struct vfio_pci_dma_buf *priv;
• size_t length;
• int ret;
• if (!vdev->pci_ops->get_dmabuf_phys)

vdev->pci_ops can be NULL.

Thanks, Alex