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[142.162.112.119]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-894655aea20sm35183896d6.3.2026.01.21.08.03.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Jan 2026 08:03:08 -0800 (PST) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1viafj-00000006Est-3jER; Wed, 21 Jan 2026 12:03:07 -0400 Date: Wed, 21 Jan 2026 12:03:07 -0400 From: Jason Gunthorpe To: Leon Romanovsky Cc: Alex Williamson , Ankit Agrawal , Kevin Tian , Vivek Kasireddy , 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 Message-ID: <20260121160307.GG961572@ziepe.ca> References: <20260121-vfio-add-pin-v1-1-4e04916b17f1@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > > 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 > --- > 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 Alex this is quite important to pick up this cycle. Thanks, Jason