Re: [Intel-gfx] [PATCH 00/10] Connect VFIO to IOMMUFD

Nicolin Chen
2022-10-31T09:39:40Z

On Fri, Oct 28, 2022 at 04:53:21PM -0700, Nicolin Chen wrote:
> On Tue, Oct 25, 2022 at 03:17:06PM -0300, Jason Gunthorpe wrote:
> > This series provides an alternative container layer for VFIO implemented
> > using iommufd. This is optional, if CONFIG_IOMMUFD is not set then it will
> > not be compiled in.
> >
> > At this point iommufd can be injected by passing in a iommfd FD to
> > VFIO_GROUP_SET_CONTAINER which will use the VFIO compat layer in iommufd
> > to obtain the compat IOAS and then connect up all the VFIO drivers as
> > appropriate.
> >
> > This is temporary stopping point, a following series will provide a way to
> > directly open a VFIO device FD and directly connect it to IOMMUFD using
> > native ioctls that can expose the IOMMUFD features like hwpt, future
> > vPASID and dynamic attachment.
> >
> > This series, in compat mode, has passed all the qemu tests we have
> > available, including the test suites for the Intel GVT mdev. Aside from
> > the temporary limitation with P2P memory this is belived to be fully
> > compatible with VFIO.
> >
> > This is on github: https://github.com/jgunthorpe/linux/commits/vfio_iommufd
>
> Tested-by: Nicolin Chen <nicoleotsuka@nvidia.com>

Sorry, wrong email -- should be:
Tested-by: Nicolin Chen <nicolinc@nvidia.com>

> Tested this branch on ARM64+SMMUv3 with the iommufd selftest and
> QEMU passthrough sanity using noiommu and virtio-iommu setups by
> combining with both CONFIG_VFIO_CONTAINER=y and =n.