[Intel-gfx] [PATCH v2 00/11] Connect VFIO to IOMMUFD

[Yi Liu]

On 2022/11/10 00:57, Jason Gunthorpe wrote:
> On Tue, Nov 08, 2022 at 11:18:03PM +0800, Yi Liu wrote:
>> On 2022/11/8 17:19, Nicolin Chen wrote:
>>> On Mon, Nov 07, 2022 at 08:52:44PM -0400, Jason Gunthorpe wrote:
>>>
>>>> This is on github: https://github.com/jgunthorpe/linux/commits/vfio_iommufd
>>> [...]
>>>> v2:
>>>>    - Rebase to v6.1-rc3, v4 iommufd series
>>>>    - Fixup comments and commit messages from list remarks
>>>>    - Fix leaking of the iommufd for mdevs
>>>>    - New patch to fix vfio modaliases when vfio container is disabled
>>>>    - Add a dmesg once when the iommufd provided /dev/vfio/vfio is opened
>>>>      to signal that iommufd is providing this
>>>
>>> I've redone my previous sanity tests. Except those reported bugs,
>>> things look fine. Once we fix those issues, GVT and other modules
>>> can run some more stressful tests, I think.
>>
>> our side is also starting test (gvt, nic passthrough) this version. need to
>> wait a while for the result.
> 
> I've updated the branches with the two functional fixes discussed on
> the list plus all the doc updates.
> 

I see, due to timzone, the kernel we grabbed is 37c9e6e44d77a, it has
slight diff in the scripts/kernel-doc compared with the latest commit
(6bb16a9c67769). I don't think it impacts the test.

https://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd.git/log/?h=for-next 
  (37c9e6e44d77a)

Our side, Yu He, Lixiao Yang has done below tests on Intel platform with
the above kernel, results are:

1) GVT-g test suit passed, Intel iGFx passthrough passed.

2) NIC passthrough test with different guest memory (1G/4G), passed.

3) Booting two different QEMUs in the same time but one QEMU opens
legacy /dev/vfio/vfio and another opens /dev/iommu. Tests passed.

4) Tried below Kconfig combinations, results are expected.

VFIO_CONTAINER=y, IOMMUFD=y   -- test pass
VFIO_CONTAINER=y, IOMMUFD=n   -- test pass
VFIO_CONTAINER=n, IOMMUFD=y , IOMMUFD_VFIO_CONTAINER=y  -- test pass
VFIO_CONTAINER=n, IOMMUFD=y , IOMMUFD_VFIO_CONTAINER=n  -- no 
/dev/vfio/vfio, so test fail, expected

5) Tested devices from multi-device group. Assign such devices to the same
VM, pass; assign them to different VMs, fail; assign them to a VM with 
Intel virtual VT-d, fail; Results are expected.

Meanwhile, I also tested the branch in development branch for nesting,
the basic functionality looks good.

Tested-by: Yi Liu <yi.l.liu at intel.com>

-- 
Regards,
Yi Liu