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b=MXWBemyst2DNL4Nx0TAlj+1GLFiWX9QtAuizKw6bPWVd+d1GjMbABZgdikCVqKrNB k+ekJUujdc+dXJX/TQGz6h7B/KkC2ygc3ieVxnnAdlZflRhVo0EUuZojYmcH0lKr3r NgFC0Xd24eGucNH1bDepZ10SkBSL4/4HS1VWSmKckK8PjHAU/cq6pIkwCyjCLl2vU/ uVzKxC18j3BNJHGLIpsM/zz7pFrvfWFIJxSMT9bPpnUo9KwegpIbpNCY+YyYxSaXQz yJDhBxW2XHOS3xz779v9FPbbO+dCOxaMQrwRKja2yAPZOzMVPs+BFtKnIawYwXFApC PappgcsvPHiOQ== From: Leon Romanovsky To: Alex Williamson Cc: Leon Romanovsky , Jason Gunthorpe , Andrew Morton , Bjorn Helgaas , =?UTF-8?q?Christian=20K=C3=B6nig?= , 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 v4 08/10] vfio/pci: Enable peer-to-peer DMA transactions by default Date: Sun, 28 Sep 2025 17:50:18 +0300 Message-ID: X-Mailer: git-send-email 2.51.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: q517q356ftde37bt8hd6m4eja4dgywpb X-Rspamd-Queue-Id: 4869F180008 X-Rspam-User: X-Rspamd-Server: rspam03 X-HE-Tag: 1759071091-72901 X-HE-Meta: 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 Avkc+QKk J9mp387RbuiFCNVAoG7Ax8fYDqe4xdTxJnYry+xI5xs6nrFz6ksOhC4tJrqQ6/kvEXYg6mDoZrV0rSJAjiy6SmCvkLgS6U89c6OTzlfVCxhSSRo5VJ2IGr8TujFjHvaZLHcLFZR/frkY6NqVOFIqkSnQOAO78hk4hXrYLWwVP0l+7vp2NL38LEf7M6AOP6T8v3QWe9s5GlAbATFOS7AVZ9F5fNKVkhul9VLpREvRkBS+lLStCcLE+MGxBo8YfE0DRY+DdL7UW0jIgUM1hl9kJFJUScXjGu0TtiKZCQ7ZYV0cnZ2E= 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 | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 7dcf5439dedc..608af135308e 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -28,6 +28,9 @@ #include #include #include +#ifdef CONFIG_VFIO_PCI_DMABUF +#include +#endif #if IS_ENABLED(CONFIG_EEH) #include #endif @@ -2085,6 +2088,7 @@ int vfio_pci_core_init_dev(struct vfio_device *core_vdev) { struct vfio_pci_core_device *vdev = container_of(core_vdev, struct vfio_pci_core_device, vdev); + int __maybe_unused ret; vdev->pdev = to_pci_dev(core_vdev->dev); vdev->irq_type = VFIO_PCI_NUM_IRQS; @@ -2094,6 +2098,11 @@ 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); +#ifdef CONFIG_VFIO_PCI_DMABUF + ret = pcim_p2pdma_init(vdev->pdev); + if (ret) + return ret; +#endif init_rwsem(&vdev->memory_lock); xa_init(&vdev->ctx); -- 2.51.0