From: Alex Williamson <alex@shazbot.org>
To: Leon Romanovsky <leon@kernel.org>
Cc: "Bjorn Helgaas" <bhelgaas@google.com>,
"Logan Gunthorpe" <logang@deltatee.com>,
"Jens Axboe" <axboe@kernel.dk>,
"Robin Murphy" <robin.murphy@arm.com>,
"Joerg Roedel" <joro@8bytes.org>, "Will Deacon" <will@kernel.org>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Kees Cook" <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
"Ankit Agrawal" <ankita@nvidia.com>,
"Yishai Hadas" <yishaih@nvidia.com>,
"Shameer Kolothum" <skolothumtho@nvidia.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Krishnakant Jaju" <kjaju@nvidia.com>,
"Matt Ochs" <mochs@nvidia.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, iommu@lists.linux.dev,
linux-mm@kvack.org, linux-doc@vger.kernel.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org, kvm@vger.kernel.org,
linux-hardening@vger.kernel.org,
"Vivek Kasireddy" <vivek.kasireddy@intel.com>
Subject: Re: [PATCH v7 10/11] vfio/pci: Add dma-buf export support for MMIO regions
Date: Mon, 10 Nov 2025 13:05:25 -0700 [thread overview]
Message-ID: <20251110130525.6712552b.alex@shazbot.org> (raw)
In-Reply-To: <20251106-dmabuf-vfio-v7-10-2503bf390699@nvidia.com>
On Thu, 6 Nov 2025 16:16:55 +0200
Leon Romanovsky <leon@kernel.org> wrote:
> diff --git a/drivers/vfio/pci/vfio_pci_dmabuf.c b/drivers/vfio/pci/vfio_pci_dmabuf.c
> new file mode 100644
> index 000000000000..cbf502b14e3c
> --- /dev/null
> +++ b/drivers/vfio/pci/vfio_pci_dmabuf.c
...
> +
> +int vfio_pci_core_feature_dma_buf(struct vfio_pci_core_device *vdev, u32 flags,
> + struct vfio_device_feature_dma_buf __user *arg,
> + size_t argsz)
> +{
> + struct vfio_device_feature_dma_buf get_dma_buf = {};
> + struct vfio_region_dma_range *dma_ranges;
> + DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
> + struct vfio_pci_dma_buf *priv;
> + size_t length;
> + int ret;
> +
> + if (!vdev->pci_ops->get_dmabuf_phys)
vdev->pci_ops can be NULL.
Thanks,
Alex
next prev parent reply other threads:[~2025-11-10 20:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-06 14:16 [PATCH v7 00/11] vfio/pci: Allow MMIO regions to be exported through dma-buf Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 01/11] PCI/P2PDMA: Separate the mmap() support from the core logic Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 02/11] PCI/P2PDMA: Simplify bus address mapping API Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 03/11] PCI/P2PDMA: Refactor to separate core P2P functionality from memory allocation Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 04/11] PCI/P2PDMA: Provide an access to pci_p2pdma_map_type() function Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 05/11] PCI/P2PDMA: Document DMABUF model Leon Romanovsky
2025-11-07 6:15 ` Randy Dunlap
2025-11-07 16:01 ` Leon Romanovsky
2025-11-07 18:58 ` Randy Dunlap
2025-11-07 20:27 ` Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 06/11] dma-buf: provide phys_vec to scatter-gather mapping routine Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 07/11] vfio: Export vfio device get and put registration helpers Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 08/11] vfio/pci: Share the core device pointer while invoking feature functions Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 09/11] vfio/pci: Enable peer-to-peer DMA transactions by default Leon Romanovsky
2025-11-06 14:16 ` [PATCH v7 10/11] vfio/pci: Add dma-buf export support for MMIO regions Leon Romanovsky
2025-11-10 20:05 ` Alex Williamson [this message]
2025-11-06 14:16 ` [PATCH v7 11/11] vfio/nvgrace: Support get_dmabuf_phys Leon Romanovsky
2025-11-10 20:05 ` Alex Williamson
2025-11-10 20:28 ` Leon Romanovsky
2025-11-10 20:42 ` [PATCH v7 00/11] vfio/pci: Allow MMIO regions to be exported through dma-buf Alex Williamson
2025-11-11 8:54 ` Christian König
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