CONFIG_VFIO_DEVICE_CDEV: Support for the VFIO cdev /dev/vfio/devices/vfioX

General informations

The Linux kernel configuration item CONFIG_VFIO_DEVICE_CDEV:

• prompt: Support for the VFIO cdev /dev/vfio/devices/vfioX
• type: bool
• depends on: CONFIG_IOMMUFD && ! CONFIG_SPAPR_TCE_IOMMU
• defined in drivers/vfio/Kconfig
• found in Linux kernels: 6.6–6.12

Help text

The VFIO device cdev is another way for userspace to get device access. Userspace gets device fd by opening device cdev under /dev/vfio/devices/vfioX, and then bind the device fd with an iommufd to set up secure DMA context for device access. This interface does not support noiommu.

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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