Re: [PATCH v6 00/11] vfio/pci: Allow MMIO regions to be exported through dma-buf

[Leon Romanovsky <leon@kernel.org>]

On Sun, Nov 02, 2025 at 10:00:48AM +0200, Leon Romanovsky wrote:

<...>

> ---
> Jason Gunthorpe (2):
>       PCI/P2PDMA: Document DMABUF model
>       vfio/nvgrace: Support get_dmabuf_phys
> 
> Leon Romanovsky (7):
>       PCI/P2PDMA: Separate the mmap() support from the core logic
>       PCI/P2PDMA: Simplify bus address mapping API
>       PCI/P2PDMA: Refactor to separate core P2P functionality from memory allocation
>       PCI/P2PDMA: Provide an access to pci_p2pdma_map_type() function
>       dma-buf: provide phys_vec to scatter-gather mapping routine
>       vfio/pci: Enable peer-to-peer DMA transactions by default
>       vfio/pci: Add dma-buf export support for MMIO regions
> 
> Vivek Kasireddy (2):
>       vfio: Export vfio device get and put registration helpers
>       vfio/pci: Share the core device pointer while invoking feature functions


Hi,

Can we get Acked-by for p2pdma and DMABUF parts?

Thanks

> 
>  Documentation/driver-api/pci/p2pdma.rst |  95 +++++++---
>  block/blk-mq-dma.c                      |   2 +-
>  drivers/dma-buf/dma-buf.c               | 235 ++++++++++++++++++++++++
>  drivers/iommu/dma-iommu.c               |   4 +-
>  drivers/pci/p2pdma.c                    | 182 +++++++++++++-----
>  drivers/vfio/pci/Kconfig                |   3 +
>  drivers/vfio/pci/Makefile               |   1 +
>  drivers/vfio/pci/nvgrace-gpu/main.c     |  56 ++++++
>  drivers/vfio/pci/vfio_pci.c             |   5 +
>  drivers/vfio/pci/vfio_pci_config.c      |  22 ++-
>  drivers/vfio/pci/vfio_pci_core.c        |  56 ++++--
>  drivers/vfio/pci/vfio_pci_dmabuf.c      | 315 ++++++++++++++++++++++++++++++++
>  drivers/vfio/pci/vfio_pci_priv.h        |  23 +++
>  drivers/vfio/vfio_main.c                |   2 +
>  include/linux/dma-buf.h                 |  18 ++
>  include/linux/pci-p2pdma.h              | 120 +++++++-----
>  include/linux/vfio.h                    |   2 +
>  include/linux/vfio_pci_core.h           |  42 +++++
>  include/uapi/linux/vfio.h               |  27 +++
>  kernel/dma/direct.c                     |   4 +-
>  mm/hmm.c                                |   2 +-
>  21 files changed, 1077 insertions(+), 139 deletions(-)
> ---
> base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
> change-id: 20251016-dmabuf-vfio-6cef732adf5a
> 
> Best regards,
> --  
> Leon Romanovsky <leonro@nvidia.com>
> 
>