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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758806336; bh=KyvoIVO5yd9BSrcJftqBm+1vYzNbuC1mO8MyRdzIYcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ifN8f/b7xNvXk4yklfFciNbhLhFDN2pkIXiduF42mX7McmhVOTROAIJh6sdHzyR7I IgdkvMQHVN0FjSppxopIVWhetGWpoc7kqFpxnE+6X8JlNiiR4kNGHaBlnLHPqV+PPZ LOWF7+YNsb2VWjaT9ndJ/3LA6FJNOMYmVy49i8vb0YVcC4GME3GFK294j6S/HWUFN5 kcpF1JjtOTynLslV5scuGLfXWpLz9sFkXFYp3MulpMtWLJRadTHqkH3RxVyANqRyKW uoJCxqeEv5HGx32G2ndbHij44kNTxzyNHZzLt4Vc3ZrDCB3RgHP7gHcSs7FXaQlGdX dl7ukQUm8QdXQ== 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 v3 08/10] vfio/pci: Enable peer-to-peer DMA transactions by default Date: Thu, 25 Sep 2025 16:14:36 +0300 Message-ID: <79ffd43cd22763a376a3abc75fc7f9ed89ec9a9d.1758804980.git.leon@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 11FA9180011 X-Stat-Signature: wuyttu64w5dbq6xrzwqcy6ybhtuqca1j X-Rspam-User: X-HE-Tag: 1758806336-793370 X-HE-Meta: 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 1CFauGq3 0xhKpElEjGy5JAuwIvu+gBhm6TCeiFZ8aIJcfgyJNRsd5hLbc+vJzKUGIIBjPXMxiX2ZrpMI/ZYE/EAKFSrS31v9We7XV6IHMr6UgbXBZ0nk+HZ2nZerJPNdJcRD+RC+jK7jNCJ1CR2jN82KtJ8dnBl63skotgEgF78gnr7AOT87AzuY9uSFWykmAClIFnxaPGgFaqdu9aEaIrBzvjJahmLWMnUMCLD1I76tKLcM2ASZaC6RF3n7hU9Mfxa90E8/Cn7yrpr6bcbMqtrmgHPEpJfCJIjTep+WaML3PDDwqVyv7VfQ= 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 | 11 +++++++++++ include/linux/vfio_pci_core.h | 3 +++ 2 files changed, 14 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 7dcf5439dedc9..356a0e2fd3780 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 i; vdev->pdev = to_pci_dev(core_vdev->dev); vdev->irq_type = VFIO_PCI_NUM_IRQS; @@ -2094,6 +2098,13 @@ 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 + for (i = 0; i < PCI_STD_NUM_BARS; i++) { + vdev->provider[i] = pcim_p2pdma_provider(vdev->pdev, i); + if (IS_ERR(vdev->provider[i])) + return PTR_ERR(vdev->provider[i]); + } +#endif 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 f541044e42a2a..2184ba65348b8 100644 --- a/include/linux/vfio_pci_core.h +++ b/include/linux/vfio_pci_core.h @@ -94,6 +94,9 @@ struct vfio_pci_core_device { struct vfio_pci_core_device *sriov_pf_core_dev; struct notifier_block nb; struct rw_semaphore memory_lock; +#ifdef CONFIG_VFIO_PCI_DMABUF + struct p2pdma_provider *provider[PCI_STD_NUM_BARS]; +#endif }; /* Will be exported for vfio pci drivers usage */ -- 2.51.0