Re: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3

[Nicolin Chen <nicolinc@nvidia.com>]

On Thu, Jan 23, 2025 at 08:28:34AM +0000, Shameerali Kolothum Thodi wrote:
> > -----Original Message-----
> > From: Nicolin Chen <nicolinc@nvidia.com>
> > I wonder if we can make some progress in Feb? If so, we can start
> > to wrap up the iommufd uAPI patches for HWPT, which was a part of
> > intel's series but never got sent since their emulated series is
> > seemingly still pending?
> 
> I think these are the  5 patches that we require from Intel pass-through series,
> 
> vfio/iommufd: Implement [at|de]tach_hwpt handlers
> vfio/iommufd: Implement HostIOMMUDeviceClass::realize_late() handler
> HostIOMMUDevice: Introduce realize_late callback
> vfio/iommufd: Add properties and handlers to TYPE_HOST_IOMMU_DEVICE_IOMMUFD
> backends/iommufd: Add helpers for invalidating user-managed HWPT
 
> Hi Zhenzhong,
> 
> Just wondering what your plans are for the above patches.  If it make sense and you
> are fine with it, I think it is a good idea one of us can pick up those from that series
> and sent out separately so that it can get some review and take it forward.

+1

These uAPI/backend patches can be sent in a smaller series to
get reviewed prior to the intel/arm series. It can merge with
either of the intel/arm series that runs faster at the end of
the day :)

Nicolin