From: Nicolin Chen <nicolinc@nvidia.com>
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>,
"Alex Williamson" <alex.williamson@redhat.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 v6 00/11] vfio/pci: Allow MMIO regions to be exported through dma-buf
Date: Tue, 4 Nov 2025 11:19:43 -0800 [thread overview]
Message-ID: <aQpRz74RurfhZK15@Asurada-Nvidia> (raw)
In-Reply-To: <20251102-dmabuf-vfio-v6-0-d773cff0db9f@nvidia.com>
On Sun, Nov 02, 2025 at 10:00:48AM +0200, Leon Romanovsky wrote:
> Changelog:
> v6:
> * Fixed wrong error check from pcim_p2pdma_init().
> * Documented pcim_p2pdma_provider() function.
> * Improved commit messages.
> * Added VFIO DMA-BUF selftest.
> * Added __counted_by(nr_ranges) annotation to struct vfio_device_feature_dma_buf.
> * Fixed error unwind when dma_buf_fd() fails.
> * Document latest changes to p2pmem.
> * Removed EXPORT_SYMBOL_GPL from pci_p2pdma_map_type.
> * Moved DMA mapping logic to DMA-BUF.
> * Removed types patch to avoid dependencies between subsystems.
> * Moved vfio_pci_dma_buf_move() in err_undo block.
> * Added nvgrace patch.
I have verified this v6 using Jason's iommufd dmabuf branch:
https://github.com/jgunthorpe/linux/commits/iommufd_dmabuf/
by drafting a QEMU patch on top of Shameer's vSMMU v5 series:
https://github.com/nicolinc/qemu/commits/wip/iommufd_dmabuf/
with that, I see GPU BAR memory be correctly fetched in the QEMU:
vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 0", offset: 0x0, size: 0x1000000
vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 2", offset: 0x0, size: 0x44f00000
vfio_region_dmabuf Device 0009:01:00.0, region "0009:01:00.0 BAR 4", offset: 0x0, size: 0x17a0000000
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
next prev parent reply other threads:[~2025-11-04 19:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-02 8:00 Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 01/11] PCI/P2PDMA: Separate the mmap() support from the core logic Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 02/11] PCI/P2PDMA: Simplify bus address mapping API Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 03/11] PCI/P2PDMA: Refactor to separate core P2P functionality from memory allocation Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 04/11] PCI/P2PDMA: Provide an access to pci_p2pdma_map_type() function Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 05/11] PCI/P2PDMA: Document DMABUF model Leon Romanovsky
2025-11-02 18:16 ` Randy Dunlap
2025-11-03 8:05 ` Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 06/11] dma-buf: provide phys_vec to scatter-gather mapping routine Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 07/11] vfio: Export vfio device get and put registration helpers Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 08/11] vfio/pci: Share the core device pointer while invoking feature functions Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 09/11] vfio/pci: Enable peer-to-peer DMA transactions by default Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 10/11] vfio/pci: Add dma-buf export support for MMIO regions Leon Romanovsky
2025-11-02 15:01 ` Alex Williamson
2025-11-02 15:12 ` Leon Romanovsky
2025-11-02 17:11 ` Alex Williamson
2025-11-02 17:16 ` Leon Romanovsky
2025-11-02 8:00 ` [PATCH v6 11/11] vfio/nvgrace: Support get_dmabuf_phys Leon Romanovsky
2025-11-03 20:07 ` [PATCH v6 00/11] vfio/pci: Allow MMIO regions to be exported through dma-buf Alex Mastro
2025-11-04 0:06 ` Jason Gunthorpe
2025-11-05 8:16 ` Leon Romanovsky
2025-11-04 7:00 ` Leon Romanovsky
2025-11-04 19:19 ` Nicolin Chen [this message]
2025-11-04 19:26 ` Jason Gunthorpe
2025-11-05 8:17 ` Leon Romanovsky
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