RE: [PATCH RFCv1 00/14] Add Tegra241 (Grace) CMDQV Support (part 2/2)

Tian, Kevin
2024-05-22T08:40:04Z

> From: Nicolin Chen <nicolinc@nvidia.com>
> Sent: Saturday, April 13, 2024 11:47 AM
>
> This is an experimental RFC series for VIOMMU infrastructure, using NVIDIA
> Tegra241 (Grace) CMDQV as a test instance.
>
> VIOMMU obj is used to represent a virtual interface (iommu) backed by an
> underlying IOMMU's HW-accelerated feature for virtualizaion: for example,
> NVIDIA's VINTF (v-interface for CMDQV) and AMD"s vIOMMU.
>
> VQUEUE obj is used to represent a virtual command queue (buffer) backed
> by
> an underlying IOMMU command queue to passthrough for VMs to use
> directly:
> for example, NVIDIA's Virtual Command Queue and AMD's Command Buffer.
>

is VCMDQ more accurate? AMD also supports fault queue passthrough
then VQUEUE sounds broader than a cmd queue...