Re: [PATCH v2 08/16] iommu: define and export iommu_access_remote_vm()

[Baolu Lu]

On 3/7/23 12:31 AM, Fenghua Yu wrote:
> Define and export iommu_access_remote_vm() to allow IOMMU related
> drivers to access user address space by PASID.
>
> The IDXD driver would like to use it to write the user's completion
> record that the hardware device is not able to write to due to user
> page fault.

I don't quite follow here. Isn't I/O page fault already supported?

Best regards,
baolu