Re: [PATCH v3 0/6] vfio: Make emulated devices prepared for vfio device cdev

Nicolin Chen
2023-03-27T17:48:25Z

On Mon, Mar 27, 2023 at 02:33:45AM -0700, Yi Liu wrote:
> External email: Use caution opening links or attachments
>
>
> The .bind_iommufd op of vfio emulated devices are either empty or does
> nothing. This is different with the vfio physical devices, to add vfio
> device cdev, need to make them act the same.
>
> This series first makes the .bind_iommufd op of vfio emulated devices
> to create iommufd_access, this introduces a new iommufd API. Then let
> the driver that does not provide .bind_iommufd op to use the vfio emulated
> iommufd op set. This makes all vfio device drivers have consistent iommufd
> operations, which is good for adding new device uAPIs in the device cdev
> series.
>
> Change log:
>
> v3:
> - Use iommufd_get_ioas() for ioas get, hence patch 01 is added to modify
> the input parameter of iommufd_get_ioas(). (Jason)
> - Add r-b from Jason and Kevin
> - Add t-b from Terrence Xu

This runs well with iommufd selftest on x86 and QEMU sanity on
ARM64, applying nesting series on top of this and cdev series:
https://github.com/nicolinc/iommufd/commits/wip/iommufd_nesting-03272023

Tested-by: Nicolin Chen <nicolinc@nvidia.com>