Re: [PATCH v14 4/4] vfio: selftests: Add NVIDIA Falcon driver for DMA testing

[David Matlack]

On 2026-06-09 04:28 PM, Rubin Du wrote:
> Add a new VFIO PCI driver for NVIDIA GPUs that enables DMA testing
> via the Falcon (Fast Logic Controller) microcontrollers. This driver
> extracts and adapts the DMA test functionality from NVIDIA's
> gpu-admin-tools project and integrates it into the existing VFIO
> selftest framework.
> 
> Falcons are general-purpose microcontrollers present on NVIDIA GPUs
> that can perform DMA operations between system memory and device
> memory. By leveraging Falcon DMA, this driver allows NVIDIA GPUs to
> be tested alongside Intel IOAT and DSA devices using the same
> selftest infrastructure.
> 
> The driver is named 'nv_falcon' to reflect that it specifically
> controls the Falcon microcontrollers for DMA operations, rather
> than exposing general GPU functionality.
> 
> Reference implementation:
> https://github.com/NVIDIA/gpu-admin-tools
> 
> Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
> Signed-off-by: Rubin Du <rubind@xxxxxxxxxx>

Acked-by: David Matlack <dmatlack@xxxxxxxxxx>