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From: Jason Gunthorpe <jgg@ziepe.ca>
To: Leon Romanovsky <leon@kernel.org>
Cc: Alex Williamson <alex@shazbot.org>,
	Ankit Agrawal <ankita@nvidia.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Vivek Kasireddy <vivek.kasireddy@intel.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH vfio-rc] vfio: Prevent from pinned DMABUF importers to attach to VFIO DMABUF
Date: Wed, 21 Jan 2026 12:03:07 -0400	[thread overview]
Message-ID: <20260121160307.GG961572@ziepe.ca> (raw)
In-Reply-To: <20260121-vfio-add-pin-v1-1-4e04916b17f1@nvidia.com>

On Wed, Jan 21, 2026 at 05:45:02PM +0200, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
> 
> Some pinned importers, such as non-ODP RDMA ones, cannot invalidate their
> mappings and therefore must be prevented from attaching to this exporter.
> 
> Fixes: 5d74781ebc86 ("vfio/pci: Add dma-buf export support for MMIO regions")
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
> ---
> This is an outcome of this discussion about revoke functionality.
> https://lore.kernel.org/all/20260121134712.GZ961572@ziepe.ca
> 
> Thanks
> ---
>  drivers/vfio/pci/vfio_pci_dmabuf.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Alex this is quite important to pick up this cycle.

Thanks,
Jason

  reply	other threads:[~2026-01-21 16:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-21 15:45 [PATCH vfio-rc] vfio: Prevent from pinned DMABUF importers to attach to VFIO DMABUF Leon Romanovsky
2026-01-21 16:03 ` Jason Gunthorpe [this message]
2026-01-22  6:14 ` Pranjal Shrivastava
2026-01-23 17:34 ` Alex Williamson

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