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bh=sWj2rZyT42J/OYfkx+qu79O+85llJ4XsbCx+y5qZzZw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XGXUL/n8MebGFtbArYlkLWAwshlP7BxUyDbGFrxA7tRPbb+hqW7iPQf3vxeSnj6r2 qyMXiIj9C9BDcZ2F0nCo6bRuMbB008fDQprxf9k+4qs/28tmANmSNOnpCu/cxJGrb+ COka5HjkPCsWuwfgYVTAypLDEUbTY3kHhsnZpd3gQRea5XwLPJaHRqkEh3G7FaaNbI ckYAcFzI41VXtx3lufS5D1zKrJ1bnuqUWNCR9gTdAgyY2tIgLBP5DHqOmKUy/rRpZu dVHYyq/1RY2yPEja3+Lqr0G5FINVgnG7peq1zjmqJ9aem6yi9JJ+JJggSh0tyZTh4g E6DP1eCMSd9Wg== 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 v5 8/9] vfio/pci: Enable peer-to-peer DMA transactions by default Date: Mon, 13 Oct 2025 18:26:10 +0300 Message-ID: X-Mailer: git-send-email 2.51.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: 9pufiwhz15nruujuyr7hqn9xczpk3rf4 X-Rspamd-Queue-Id: 2F52B8001C X-Rspamd-Server: rspam09 X-HE-Tag: 1760369216-552207 X-HE-Meta: U2FsdGVkX1/24p8Mq0DAOFcACbw1SQhoz7/TYrhr8gISpePhPUtxpoF2+bIGKutYdYKQL5eEbG02MZ0nzV1QLIvrCQAyv2A5LiEU3sSF8CyrAckDeF7gZQktZhYcWUApod192JZPi3nfaHOfHJrnC699EFw8YPNsEXhIaZgl7GExRu4+P+ihOUBpGXwdAggtVAmvCohb3Qe83gSI8BWnnlDrcP7r6OVZXAZ635JwwPyzIAAzsj12QP4ULKlndfVfR7Cb7fs3M928+2vni2LvMtFq7Sipnkn7AEL3Va7YlMjQu1bS38JiRQSdGD4vzHMqINTmfoW7GMJPPg6oym3EQWlRTR2gOrDY1yJBsZiB8kpmDaYUT8vGY9oUCCLkeIrXT5aUaYl1dA/4Z+bKhfQeu9OTptZ55RixBz5e8PW/WhrOT8TpgDU+68UJ7/lmzN65oCJPaWmjq8R1Idyaex62E5rnv7RoJH7wJO4gfLDjHJKOaenudP/ApTKt+5VOjG8jHFG82GuKsDHQOsjr0M7PsFxQaoww9QYRj6NMLH5NJswLCvIzMvK15Z0ZnI83T8Egac2HrQu+ruyP/Qn0cFpQYebcXKWStkMQcWGnSbUPMEjnFageLDxckeX632APXIDXiD8c6flKf9Dks4+hl5CCq9L0B7Dev3jIH01ZxV64w17idnXZZ8QsQ3ya1HYY4dgoVH1Jjs/4OqeWDgR1vlMV/ErBhuG7qmAiOh6T19Q4bPInQBFJrdfbYIc926NMGg86E/vFjTwRoMa23410yjdZEzkZeBEUR0Hu8hRgD1PBgux15hQ1kKIErcCwwnrL5DvCpgnYEXBCVixyHbrQ/cBa2O/MWh13GB6gVaereTKNTgexAe7ry9GCKSc9X0OnFuyf6J66E03Dk/S3pUUX2VYmJHI0TLRVUNUzuYjWQmO8UnXF1ekEDEojPK4XJBc08MEUoNSzsGOZ0TCg0Gpupfv pX5bPIPw nXl3bybCEW+pfxHulLM9ZaofYPB/BKuRNYOw4IJgDXavTOB6vtJOPlfxf5cmnCLmfoi5izE1TMvGavZt7yiIThV2zw1MyKYC713S87qi7+wyb+6vICrOanVWhmKAnA93Q+m3VKdwdXyCxdla43CR9mcYfi3IpxPq/cOiKUwzUBzmvcUvf/LNZdcYJuWzP8Q1ON2jEUepxn/OsPmg57Tvz/zi+Y0uhdl4K/o8n/Yk2cGvKSRNQfGwDSwFyOM5W4jVAPNmSbSHPScBkoTkOlm6BCO/CqBuOmpMplHdFZTEsybeTNRs= 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 | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index ca9a95716a85..fe247d0e2831 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 @@ -2081,6 +2082,7 @@ 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 ret; vdev->pdev = to_pci_dev(core_vdev->dev); vdev->irq_type = VFIO_PCI_NUM_IRQS; @@ -2090,6 +2092,9 @@ 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); + ret = pcim_p2pdma_init(vdev->pdev); + if (ret != -EOPNOTSUPP) + return ret; init_rwsem(&vdev->memory_lock); xa_init(&vdev->ctx); -- 2.51.0