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b=oV6re8fiGNwYDZzCzdRzp9XpjScFB7jHhr0bUqrsSd/RU8VD1+cDyB4db1ivcuz67 ZbqOoy4QDgWahTEBLZIkeuGoLDtCxufGY1mXb4uUNEIIogWWDZKxvNPNgmGAOQfthR M88oaFlWV16G0mYbetwlnMeQOqlSTPkZtmJgNfx1DBxt8qHsi8vzBGtgUSwzfG/EF/ +feKrcxhDRe2w3XUDGmoRDhE/Z6LPttQLNSWEXlBJ9NMAhEVqOVOLoQfSfWwEFlJa9 t+8VS5mhktJavv7v+cSijhYGtO53nybwj4RxWUn/B2l2HWenabrQ2aR3U+cNT0+v2t iMQ+fAg6U3ZtQ== From: Leon Romanovsky To: Alex Williamson Cc: Leon Romanovsky , Jason Gunthorpe , Andrew Morton , Bjorn Helgaas , =?UTF-8?q?Christian=20K=C3=B6nig?= , Christoph Hellwig , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, Jens Axboe , Joerg Roedel , kvm@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Logan Gunthorpe , Marek Szyprowski , Robin Murphy , Sumit Semwal , Vivek Kasireddy , Will Deacon Subject: [PATCH v1 08/10] vfio/pci: Enable peer-to-peer DMA transactions by default Date: Mon, 4 Aug 2025 16:00:43 +0300 Message-ID: X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: z8acrmsskz6gagigytaqhdr1f1r7qeih X-Rspam-User: X-Rspamd-Queue-Id: D6F7D2000D X-Rspamd-Server: rspam02 X-HE-Tag: 1754312502-564139 X-HE-Meta: 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 3PLluGSa 5GQR2TT9fwiOsWAbb5smy4Nm0GikYIziFHIegmYuFmzE+oIpE649O9aM0SkpdWwDaW6V2XK6peZN5yWDg5pFA5d2WI+fkstPcGPAbdhGy13dvr19DMjp5gVMUjK1qpSjS563qklLJHxVMmi/IKidX/2SgE+2v+7RW10Anej1DEZ3VkSN5s3Um8s34hiRhNuYXJOXSCI6JT4e5gtdZLBUoH8utvD9jubXWKMvWaKK/hBJQUrj+Swjm+BmUbbPXD3Uqm3HdIhLAeEHab9/LBg0O/NZ/IMgxTYFh6WYPZsdQICa/dVE= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Leon Romanovsky Make sure that all VFIO PCI devices have peer-to-peer capabilities enables, so we would be able to export their MMIO memory through DMABUF, Signed-off-by: Leon Romanovsky --- drivers/vfio/pci/vfio_pci_core.c | 4 ++++ include/linux/vfio_pci_core.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 31bdb9110cc0f..df9a32d3deac9 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -28,6 +28,7 @@ #include #include #include +#include #if IS_ENABLED(CONFIG_EEH) #include #endif @@ -2088,6 +2089,9 @@ int vfio_pci_core_init_dev(struct vfio_device *core_vdev) INIT_LIST_HEAD(&vdev->dummy_resources_list); INIT_LIST_HEAD(&vdev->ioeventfds_list); INIT_LIST_HEAD(&vdev->sriov_pfs_item); + vdev->provider = pci_p2pdma_enable(vdev->pdev); + if (IS_ERR(vdev->provider)) + return PTR_ERR(vdev->provider); init_rwsem(&vdev->memory_lock); xa_init(&vdev->ctx); diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h index fbb472dd99b36..b017fae251811 100644 --- a/include/linux/vfio_pci_core.h +++ b/include/linux/vfio_pci_core.h @@ -94,6 +94,7 @@ struct vfio_pci_core_device { struct vfio_pci_core_device *sriov_pf_core_dev; struct notifier_block nb; struct rw_semaphore memory_lock; + struct p2pdma_provider *provider; }; /* Will be exported for vfio pci drivers usage */ -- 2.50.1