RE: [PATCH v8 09/11] vfio/pci: Enable peer-to-peer DMA transactions by default

[Tian, Kevin]

> From: Leon Romanovsky <leon@xxxxxxxxxx>
> Sent: Tuesday, November 11, 2025 5:58 PM
> 
> From: Leon Romanovsky <leonro@xxxxxxxxxx>

not required with only your own s-o-b

> @@ -2090,6 +2092,9 @@ int vfio_pci_core_init_dev(struct vfio_device
> *core_vdev)
>  	INIT_LIST_HEAD(&vdev->dummy_resources_list);
>  	INIT_LIST_HEAD(&vdev->ioeventfds_list);
>  	INIT_LIST_HEAD(&vdev->sriov_pfs_item);
> +	ret = pcim_p2pdma_init(vdev->pdev);
> +	if (ret && ret != -EOPNOTSUPP)
> +		return ret;

Reading the commit msg seems -EOPNOTSUPP is only returned for fake
PCI devices, otherwise it implies regression. better add a comment for it?

otherwise,

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>