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384a530111
With a functional and tested backend for virtio-block live migration, add the virtio-block device ID to the pci_device_id table. Currently, the driver supports legacy IO functionality only for virtio-net, and it is accounted for in specific parts of the code. To enforce this limitation, an explicit check for virtio-net, has been added in virtiovf_support_legacy_io(). Once a backend implements legacy IO functionality for virtio-block, the necessary support will be added to the driver, and this additional check should be removed. The module description was updated accordingly. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yishai Hadas <yishaih@nvidia.com> Link: https://lore.kernel.org/r/20250302162723.82578-1-yishaih@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
32 lines
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config VIRTIO_VFIO_PCI
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tristate "VFIO support for VIRTIO PCI VF devices"
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depends on VIRTIO_PCI
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select VFIO_PCI_CORE
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help
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This provides migration support for VIRTIO NET and BLOCK PCI VF
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devices using the VFIO framework. Migration support requires the
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SR-IOV PF device to support specific VIRTIO extensions,
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otherwise this driver provides no additional functionality
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beyond vfio-pci.
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Migration support in this driver relies on dirty page tracking
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provided by the IOMMU hardware and exposed through IOMMUFD, any
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other use cases are dis-recommended.
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If you don't know what to do here, say N.
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config VIRTIO_VFIO_PCI_ADMIN_LEGACY
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bool "Legacy I/O support for VIRTIO NET PCI VF devices"
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depends on VIRTIO_VFIO_PCI && VIRTIO_PCI_ADMIN_LEGACY
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default y
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help
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This extends the virtio-vfio-pci driver to support legacy I/O
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access, allowing use of legacy virtio drivers with VIRTIO NET
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PCI VF devices. Legacy I/O support requires the SR-IOV PF
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device to support and enable specific VIRTIO extensions,
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otherwise this driver provides no additional functionality
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beyond vfio-pci.
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If you don't know what to do here, say N.
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