Re: [PATCH v7] vfio/cdx: add support for CDX bus

[Alex Williamson]

On Wed, 31 May 2023 18:15:57 +0530
Nipun Gupta <nipun.gupta@xxxxxxx> wrote:

> vfio-cdx driver enables IOCTLs for user space to query
> MMIO regions for CDX devices and mmap them. This change
> also adds support for reset of CDX devices. With VFIO
> enabled on CDX devices, user-space applications can also
> exercise DMA securely via IOMMU on these devices.
> 
> This change adds the VFIO CDX driver and enables the following
> ioctls for CDX devices:
>  - VFIO_DEVICE_GET_INFO:
>  - VFIO_DEVICE_GET_REGION_INFO
>  - VFIO_DEVICE_RESET
> 
> Signed-off-by: Nipun Gupta <nipun.gupta@xxxxxxx>
> Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@xxxxxxx>
> Tested-by: Nikhil Agarwal <nikhil.agarwal@xxxxxxx>
> ---
> 
> Changed to support driver managed dma in CDX bus has been
> submitted at:
> https://lore.kernel.org/lkml/20230117134139.1298-1-nipun.gupta@xxxxxxx/T/
> 
> Changes v6->v7:
> - updated GFP_KERNEL to GFP_KERNEL_ACCOUNT in kcalloc
> - remove redundant error condition
> - updated return codes

Applied to vfio next branch for v6.5.  Thanks,

Alex